/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:12:28,401 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:12:28,460 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 20:12:28,464 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:12:28,464 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:12:28,485 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:12:28,485 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:12:28,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:12:28,485 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:12:28,485 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:12:28,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:12:28,485 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:12:28,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:12:28,486 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:12:28,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:12:28,487 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:12:28,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:12:28,487 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:12:28,487 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:12:28,487 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:12:28,487 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:12:28,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:12:28,488 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:12:28,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:12:28,489 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:12:28,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:12:28,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:12:28,489 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET [2025-04-13 20:12:28,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:12:28,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:12:28,692 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:12:28,693 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:12:28,694 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:12:28,694 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2025-04-13 20:12:29,941 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a0753c4/d822360bbd1240e489b71742fc955645/FLAGd005ddbc6 [2025-04-13 20:12:30,142 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:12:30,142 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2025-04-13 20:12:30,149 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a0753c4/d822360bbd1240e489b71742fc955645/FLAGd005ddbc6 [2025-04-13 20:12:30,942 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19a0753c4/d822360bbd1240e489b71742fc955645 [2025-04-13 20:12:30,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:12:30,945 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:12:30,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:12:30,946 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:12:30,949 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:12:30,950 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:12:30" (1/1) ... [2025-04-13 20:12:30,950 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127d9550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:30, skipping insertion in model container [2025-04-13 20:12:30,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:12:30" (1/1) ... [2025-04-13 20:12:30,966 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:12:31,093 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c[2155,2168] [2025-04-13 20:12:31,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:12:31,102 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:12:31,121 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c[2155,2168] [2025-04-13 20:12:31,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:12:31,132 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:12:31,132 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31 WrapperNode [2025-04-13 20:12:31,133 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:12:31,134 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:12:31,134 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:12:31,134 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:12:31,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,144 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,155 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2025-04-13 20:12:31,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:12:31,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:12:31,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:12:31,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:12:31,161 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,161 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,162 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,174 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-04-13 20:12:31,174 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,174 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,179 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,180 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:12:31,190 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:12:31,190 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:12:31,190 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:12:31,190 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (1/1) ... [2025-04-13 20:12:31,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:12:31,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:31,214 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-13 20:12:31,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-13 20:12:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:12:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:12:31,234 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:12:31,234 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:12:31,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:12:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-13 20:12:31,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-13 20:12:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:12:31,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:12:31,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:12:31,236 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 20:12:31,293 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:12:31,295 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:12:31,398 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:12:31,399 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:12:31,399 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:12:31,523 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:12:31,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:12:31 BoogieIcfgContainer [2025-04-13 20:12:31,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:12:31,527 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:12:31,527 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:12:31,530 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:12:31,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:12:30" (1/3) ... [2025-04-13 20:12:31,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d9824d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:12:31, skipping insertion in model container [2025-04-13 20:12:31,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:12:31" (2/3) ... [2025-04-13 20:12:31,531 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16d9824d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:12:31, skipping insertion in model container [2025-04-13 20:12:31,531 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:12:31" (3/3) ... [2025-04-13 20:12:31,532 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2025-04-13 20:12:31,541 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:12:31,542 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-dist.wvr.c that has 4 procedures, 22 locations, 21 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 20:12:31,542 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:12:31,579 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-13 20:12:31,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 24 transitions, 69 flow [2025-04-13 20:12:31,630 INFO L116 PetriNetUnfolderBase]: 3/21 cut-off events. [2025-04-13 20:12:31,636 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:12:31,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 21 events. 3/21 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-04-13 20:12:31,637 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 24 transitions, 69 flow [2025-04-13 20:12:31,639 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 20 transitions, 58 flow [2025-04-13 20:12:31,651 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:12:31,658 INFO L340 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@1d6d23e3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:12:31,658 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 20:12:31,664 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:12:31,664 INFO L116 PetriNetUnfolderBase]: 3/19 cut-off events. [2025-04-13 20:12:31,664 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:12:31,664 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:31,665 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:31,665 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:31,668 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1194039399, now seen corresponding path program 1 times [2025-04-13 20:12:31,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:31,673 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770272767] [2025-04-13 20:12:31,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:12:31,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:31,720 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-13 20:12:31,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-13 20:12:31,751 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:12:31,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:32,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:32,119 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770272767] [2025-04-13 20:12:32,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770272767] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:12:32,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:12:32,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 20:12:32,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226113308] [2025-04-13 20:12:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:32,127 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 20:12:32,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:32,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 20:12:32,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 20:12:32,145 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:32,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:32,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:32,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:32,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:32,322 INFO L116 PetriNetUnfolderBase]: 386/564 cut-off events. [2025-04-13 20:12:32,322 INFO L117 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2025-04-13 20:12:32,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 564 events. 386/564 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1772 event pairs, 124 based on Foata normal form. 1/415 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2025-04-13 20:12:32,333 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 32 selfloop transitions, 4 changer transitions 1/37 dead transitions. [2025-04-13 20:12:32,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 37 transitions, 181 flow [2025-04-13 20:12:32,334 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 20:12:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 20:12:32,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2025-04-13 20:12:32,345 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2025-04-13 20:12:32,347 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 58 flow. Second operand 3 states and 47 transitions. [2025-04-13 20:12:32,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 37 transitions, 181 flow [2025-04-13 20:12:32,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 37 transitions, 159 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-13 20:12:32,356 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 72 flow [2025-04-13 20:12:32,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2025-04-13 20:12:32,362 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-13 20:12:32,362 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 72 flow [2025-04-13 20:12:32,363 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:32,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:32,363 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:32,363 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:12:32,363 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:32,364 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:32,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1477693646, now seen corresponding path program 1 times [2025-04-13 20:12:32,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:32,364 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233074144] [2025-04-13 20:12:32,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:12:32,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:32,374 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:12:32,390 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:32,390 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:12:32,390 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:32,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:32,617 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233074144] [2025-04-13 20:12:32,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233074144] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:12:32,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:12:32,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 20:12:32,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519833756] [2025-04-13 20:12:32,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:32,618 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:12:32,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:32,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:12:32,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:12:32,619 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:32,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 72 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:32,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:32,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:32,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:32,930 INFO L116 PetriNetUnfolderBase]: 555/832 cut-off events. [2025-04-13 20:12:32,930 INFO L117 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2025-04-13 20:12:32,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 832 events. 555/832 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3168 event pairs, 144 based on Foata normal form. 12/844 useless extension candidates. Maximal degree in co-relation 549. Up to 361 conditions per place. [2025-04-13 20:12:32,937 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 64 selfloop transitions, 8 changer transitions 7/79 dead transitions. [2025-04-13 20:12:32,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 79 transitions, 393 flow [2025-04-13 20:12:32,939 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:12:32,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:12:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 93 transitions. [2025-04-13 20:12:32,941 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2025-04-13 20:12:32,941 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 72 flow. Second operand 7 states and 93 transitions. [2025-04-13 20:12:32,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 79 transitions, 393 flow [2025-04-13 20:12:32,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 79 transitions, 383 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 20:12:32,943 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 137 flow [2025-04-13 20:12:32,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=137, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2025-04-13 20:12:32,944 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2025-04-13 20:12:32,944 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 137 flow [2025-04-13 20:12:32,944 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:32,944 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:32,944 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:32,944 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:12:32,944 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:32,946 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:32,946 INFO L85 PathProgramCache]: Analyzing trace with hash -2016132663, now seen corresponding path program 1 times [2025-04-13 20:12:32,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:32,946 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801210422] [2025-04-13 20:12:32,946 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:12:32,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:32,958 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:12:32,968 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:32,969 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:12:32,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:33,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:33,113 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801210422] [2025-04-13 20:12:33,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801210422] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:33,113 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402194010] [2025-04-13 20:12:33,113 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:12:33,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:33,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:33,115 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) [2025-04-13 20:12:33,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 20:12:33,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:12:33,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:33,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:12:33,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:33,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 20:12:33,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:33,350 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:33,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402194010] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:33,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:12:33,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 9 [2025-04-13 20:12:33,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568227242] [2025-04-13 20:12:33,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:33,482 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:12:33,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:33,482 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:12:33,482 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2025-04-13 20:12:33,482 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:33,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 137 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:33,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:33,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:33,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:33,763 INFO L116 PetriNetUnfolderBase]: 821/1216 cut-off events. [2025-04-13 20:12:33,763 INFO L117 PetriNetUnfolderBase]: For 1385/1385 co-relation queries the response was YES. [2025-04-13 20:12:33,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4000 conditions, 1216 events. 821/1216 cut-off events. For 1385/1385 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4730 event pairs, 229 based on Foata normal form. 4/1220 useless extension candidates. Maximal degree in co-relation 2273. Up to 435 conditions per place. [2025-04-13 20:12:33,772 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 82 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2025-04-13 20:12:33,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 99 transitions, 625 flow [2025-04-13 20:12:33,773 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:12:33,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:12:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2025-04-13 20:12:33,775 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2025-04-13 20:12:33,775 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 137 flow. Second operand 8 states and 115 transitions. [2025-04-13 20:12:33,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 99 transitions, 625 flow [2025-04-13 20:12:33,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 99 transitions, 585 flow, removed 15 selfloop flow, removed 2 redundant places. [2025-04-13 20:12:33,782 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 268 flow [2025-04-13 20:12:33,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=268, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2025-04-13 20:12:33,785 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2025-04-13 20:12:33,785 INFO L485 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 268 flow [2025-04-13 20:12:33,785 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:33,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:33,785 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:33,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-13 20:12:33,986 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:33,986 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:33,986 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:33,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1891546140, now seen corresponding path program 1 times [2025-04-13 20:12:33,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:33,987 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151008840] [2025-04-13 20:12:33,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:12:33,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:33,991 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:12:34,001 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:34,002 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:12:34,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:34,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:34,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:34,104 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151008840] [2025-04-13 20:12:34,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151008840] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:12:34,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:12:34,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 20:12:34,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802401705] [2025-04-13 20:12:34,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:34,105 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:12:34,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:34,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:12:34,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:12:34,105 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:34,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 268 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:34,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:34,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:34,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:34,344 INFO L116 PetriNetUnfolderBase]: 911/1334 cut-off events. [2025-04-13 20:12:34,344 INFO L117 PetriNetUnfolderBase]: For 3560/3560 co-relation queries the response was YES. [2025-04-13 20:12:34,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5341 conditions, 1334 events. 911/1334 cut-off events. For 3560/3560 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5158 event pairs, 412 based on Foata normal form. 2/1336 useless extension candidates. Maximal degree in co-relation 3531. Up to 1056 conditions per place. [2025-04-13 20:12:34,352 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 63 selfloop transitions, 23 changer transitions 3/89 dead transitions. [2025-04-13 20:12:34,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 89 transitions, 736 flow [2025-04-13 20:12:34,352 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:12:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:12:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2025-04-13 20:12:34,353 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2025-04-13 20:12:34,353 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 268 flow. Second operand 7 states and 80 transitions. [2025-04-13 20:12:34,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 89 transitions, 736 flow [2025-04-13 20:12:34,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 724 flow, removed 6 selfloop flow, removed 0 redundant places. [2025-04-13 20:12:34,362 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 455 flow [2025-04-13 20:12:34,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=455, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2025-04-13 20:12:34,362 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 28 predicate places. [2025-04-13 20:12:34,362 INFO L485 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 455 flow [2025-04-13 20:12:34,363 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:34,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:34,363 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:34,363 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 20:12:34,363 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:34,363 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:34,363 INFO L85 PathProgramCache]: Analyzing trace with hash -306076918, now seen corresponding path program 2 times [2025-04-13 20:12:34,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:34,363 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327703094] [2025-04-13 20:12:34,363 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:12:34,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:34,369 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:34,378 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:34,378 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:34,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:34,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:34,549 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327703094] [2025-04-13 20:12:34,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327703094] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:34,549 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826294643] [2025-04-13 20:12:34,549 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:12:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:34,552 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) [2025-04-13 20:12:34,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 20:12:34,586 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:34,607 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:34,607 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:34,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:34,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:12:34,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:34,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:35,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826294643] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:35,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:12:35,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 14 [2025-04-13 20:12:35,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628903149] [2025-04-13 20:12:35,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:35,285 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:12:35,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:35,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:12:35,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-04-13 20:12:35,285 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:35,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 455 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:35,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:35,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:35,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:35,644 INFO L116 PetriNetUnfolderBase]: 1219/1775 cut-off events. [2025-04-13 20:12:35,644 INFO L117 PetriNetUnfolderBase]: For 7005/7005 co-relation queries the response was YES. [2025-04-13 20:12:35,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8102 conditions, 1775 events. 1219/1775 cut-off events. For 7005/7005 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7216 event pairs, 317 based on Foata normal form. 6/1781 useless extension candidates. Maximal degree in co-relation 5785. Up to 599 conditions per place. [2025-04-13 20:12:35,656 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 103 selfloop transitions, 27 changer transitions 1/131 dead transitions. [2025-04-13 20:12:35,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 131 transitions, 1159 flow [2025-04-13 20:12:35,657 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:12:35,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:12:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2025-04-13 20:12:35,658 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2025-04-13 20:12:35,658 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 455 flow. Second operand 8 states and 115 transitions. [2025-04-13 20:12:35,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 131 transitions, 1159 flow [2025-04-13 20:12:35,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 131 transitions, 1081 flow, removed 17 selfloop flow, removed 2 redundant places. [2025-04-13 20:12:35,671 INFO L231 Difference]: Finished difference. Result has 64 places, 70 transitions, 628 flow [2025-04-13 20:12:35,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=628, PETRI_PLACES=64, PETRI_TRANSITIONS=70} [2025-04-13 20:12:35,672 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 37 predicate places. [2025-04-13 20:12:35,672 INFO L485 AbstractCegarLoop]: Abstraction has has 64 places, 70 transitions, 628 flow [2025-04-13 20:12:35,672 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:35,672 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:35,672 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:35,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 20:12:35,873 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:35,873 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:35,874 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:35,874 INFO L85 PathProgramCache]: Analyzing trace with hash 423222162, now seen corresponding path program 3 times [2025-04-13 20:12:35,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:35,874 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3702901] [2025-04-13 20:12:35,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:12:35,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:35,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:35,884 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:35,884 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:12:35,884 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:36,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:36,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:36,005 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3702901] [2025-04-13 20:12:36,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3702901] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:36,006 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429340862] [2025-04-13 20:12:36,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:12:36,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:36,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:36,007 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) [2025-04-13 20:12:36,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 20:12:36,038 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:36,065 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:36,065 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:12:36,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:36,066 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:12:36,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:36,099 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:12:36,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429340862] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:12:36,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:12:36,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-04-13 20:12:36,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652021377] [2025-04-13 20:12:36,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:36,100 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:12:36,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:36,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:12:36,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:12:36,100 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:36,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 70 transitions, 628 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:36,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:36,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:36,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:36,343 INFO L116 PetriNetUnfolderBase]: 1256/1828 cut-off events. [2025-04-13 20:12:36,343 INFO L117 PetriNetUnfolderBase]: For 9999/9999 co-relation queries the response was YES. [2025-04-13 20:12:36,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9193 conditions, 1828 events. 1256/1828 cut-off events. For 9999/9999 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7507 event pairs, 485 based on Foata normal form. 2/1830 useless extension candidates. Maximal degree in co-relation 7181. Up to 1423 conditions per place. [2025-04-13 20:12:36,356 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 78 selfloop transitions, 33 changer transitions 3/114 dead transitions. [2025-04-13 20:12:36,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 114 transitions, 1219 flow [2025-04-13 20:12:36,356 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:12:36,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:12:36,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2025-04-13 20:12:36,357 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2025-04-13 20:12:36,357 INFO L175 Difference]: Start difference. First operand has 64 places, 70 transitions, 628 flow. Second operand 7 states and 79 transitions. [2025-04-13 20:12:36,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 114 transitions, 1219 flow [2025-04-13 20:12:36,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 114 transitions, 1175 flow, removed 22 selfloop flow, removed 0 redundant places. [2025-04-13 20:12:36,377 INFO L231 Difference]: Finished difference. Result has 73 places, 85 transitions, 861 flow [2025-04-13 20:12:36,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=861, PETRI_PLACES=73, PETRI_TRANSITIONS=85} [2025-04-13 20:12:36,379 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 46 predicate places. [2025-04-13 20:12:36,379 INFO L485 AbstractCegarLoop]: Abstraction has has 73 places, 85 transitions, 861 flow [2025-04-13 20:12:36,379 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:36,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:36,379 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:36,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 20:12:36,579 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:36,580 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:36,580 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash -80946416, now seen corresponding path program 2 times [2025-04-13 20:12:36,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:36,580 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241386503] [2025-04-13 20:12:36,580 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:12:36,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:36,585 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:36,591 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:36,591 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:36,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:36,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:36,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:36,726 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241386503] [2025-04-13 20:12:36,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241386503] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:36,726 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647526666] [2025-04-13 20:12:36,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:12:36,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:36,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:36,729 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) [2025-04-13 20:12:36,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 20:12:36,759 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:36,780 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:36,780 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:36,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:36,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:12:36,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:36,821 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:12:36,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647526666] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:12:36,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:12:36,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-04-13 20:12:36,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503282654] [2025-04-13 20:12:36,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:36,821 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:12:36,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:36,822 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:12:36,822 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-04-13 20:12:36,822 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:36,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 85 transitions, 861 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:36,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:36,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:36,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:37,088 INFO L116 PetriNetUnfolderBase]: 1263/1862 cut-off events. [2025-04-13 20:12:37,088 INFO L117 PetriNetUnfolderBase]: For 13159/13159 co-relation queries the response was YES. [2025-04-13 20:12:37,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10229 conditions, 1862 events. 1263/1862 cut-off events. For 13159/13159 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8006 event pairs, 344 based on Foata normal form. 12/1874 useless extension candidates. Maximal degree in co-relation 7977. Up to 973 conditions per place. [2025-04-13 20:12:37,099 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 103 selfloop transitions, 26 changer transitions 7/136 dead transitions. [2025-04-13 20:12:37,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 136 transitions, 1502 flow [2025-04-13 20:12:37,100 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:12:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:12:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2025-04-13 20:12:37,101 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2025-04-13 20:12:37,101 INFO L175 Difference]: Start difference. First operand has 73 places, 85 transitions, 861 flow. Second operand 7 states and 89 transitions. [2025-04-13 20:12:37,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 136 transitions, 1502 flow [2025-04-13 20:12:37,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 136 transitions, 1450 flow, removed 26 selfloop flow, removed 0 redundant places. [2025-04-13 20:12:37,127 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 941 flow [2025-04-13 20:12:37,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=941, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2025-04-13 20:12:37,128 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 55 predicate places. [2025-04-13 20:12:37,128 INFO L485 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 941 flow [2025-04-13 20:12:37,128 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:37,128 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:37,128 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:37,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 20:12:37,328 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:37,329 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:37,329 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash -41220750, now seen corresponding path program 4 times [2025-04-13 20:12:37,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:37,329 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9052929] [2025-04-13 20:12:37,330 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:12:37,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:37,333 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:37,338 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:37,338 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:12:37,338 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:37,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:37,432 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9052929] [2025-04-13 20:12:37,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9052929] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:37,432 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164970936] [2025-04-13 20:12:37,432 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:12:37,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:37,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:37,435 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) [2025-04-13 20:12:37,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 20:12:37,464 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:37,485 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:37,485 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:12:37,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:37,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:12:37,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:37,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:37,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164970936] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:37,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:12:37,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 13 [2025-04-13 20:12:37,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028779805] [2025-04-13 20:12:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:37,631 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:12:37,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:37,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:12:37,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:12:37,632 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:37,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 941 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:37,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:37,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:37,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:37,940 INFO L116 PetriNetUnfolderBase]: 1459/2139 cut-off events. [2025-04-13 20:12:37,941 INFO L117 PetriNetUnfolderBase]: For 17598/17598 co-relation queries the response was YES. [2025-04-13 20:12:37,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12124 conditions, 2139 events. 1459/2139 cut-off events. For 17598/17598 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9157 event pairs, 337 based on Foata normal form. 5/2144 useless extension candidates. Maximal degree in co-relation 10010. Up to 736 conditions per place. [2025-04-13 20:12:37,976 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 115 selfloop transitions, 46 changer transitions 0/161 dead transitions. [2025-04-13 20:12:37,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 161 transitions, 1810 flow [2025-04-13 20:12:37,977 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-13 20:12:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-13 20:12:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2025-04-13 20:12:37,978 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-04-13 20:12:37,978 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 941 flow. Second operand 8 states and 116 transitions. [2025-04-13 20:12:37,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 161 transitions, 1810 flow [2025-04-13 20:12:38,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 161 transitions, 1729 flow, removed 12 selfloop flow, removed 3 redundant places. [2025-04-13 20:12:38,009 INFO L231 Difference]: Finished difference. Result has 90 places, 104 transitions, 1250 flow [2025-04-13 20:12:38,009 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1250, PETRI_PLACES=90, PETRI_TRANSITIONS=104} [2025-04-13 20:12:38,010 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 63 predicate places. [2025-04-13 20:12:38,010 INFO L485 AbstractCegarLoop]: Abstraction has has 90 places, 104 transitions, 1250 flow [2025-04-13 20:12:38,010 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:38,010 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:38,010 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:38,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-13 20:12:38,216 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:38,216 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:38,216 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash -651282219, now seen corresponding path program 2 times [2025-04-13 20:12:38,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:38,216 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279473017] [2025-04-13 20:12:38,217 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:12:38,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:38,220 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:38,228 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:38,228 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:38,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:38,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:38,330 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279473017] [2025-04-13 20:12:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279473017] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:38,330 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150302665] [2025-04-13 20:12:38,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:12:38,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:38,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:38,332 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) [2025-04-13 20:12:38,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-13 20:12:38,367 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:38,385 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:38,385 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:38,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:38,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:12:38,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:38,415 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:12:38,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150302665] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:12:38,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:12:38,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-04-13 20:12:38,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269096692] [2025-04-13 20:12:38,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:38,415 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:12:38,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:38,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:12:38,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:12:38,416 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:38,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 104 transitions, 1250 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:38,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:38,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:38,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:38,680 INFO L116 PetriNetUnfolderBase]: 1472/2158 cut-off events. [2025-04-13 20:12:38,680 INFO L117 PetriNetUnfolderBase]: For 21403/21403 co-relation queries the response was YES. [2025-04-13 20:12:38,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12900 conditions, 2158 events. 1472/2158 cut-off events. For 21403/21403 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9553 event pairs, 417 based on Foata normal form. 3/2161 useless extension candidates. Maximal degree in co-relation 12084. Up to 1302 conditions per place. [2025-04-13 20:12:38,695 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 115 selfloop transitions, 38 changer transitions 5/158 dead transitions. [2025-04-13 20:12:38,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 158 transitions, 2021 flow [2025-04-13 20:12:38,695 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:12:38,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:12:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2025-04-13 20:12:38,696 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2025-04-13 20:12:38,696 INFO L175 Difference]: Start difference. First operand has 90 places, 104 transitions, 1250 flow. Second operand 7 states and 88 transitions. [2025-04-13 20:12:38,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 158 transitions, 2021 flow [2025-04-13 20:12:38,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 158 transitions, 1940 flow, removed 28 selfloop flow, removed 1 redundant places. [2025-04-13 20:12:38,743 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 1309 flow [2025-04-13 20:12:38,743 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1172, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1309, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2025-04-13 20:12:38,743 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 70 predicate places. [2025-04-13 20:12:38,743 INFO L485 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 1309 flow [2025-04-13 20:12:38,744 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:38,744 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:38,744 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:38,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-13 20:12:38,944 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:38,944 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:38,945 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:38,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1141642517, now seen corresponding path program 3 times [2025-04-13 20:12:38,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:38,945 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436460026] [2025-04-13 20:12:38,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:12:38,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:38,948 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:38,953 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:38,954 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:12:38,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:39,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:39,075 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436460026] [2025-04-13 20:12:39,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436460026] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:39,075 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361963405] [2025-04-13 20:12:39,075 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:12:39,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:39,077 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) [2025-04-13 20:12:39,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-13 20:12:39,106 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:39,124 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:39,125 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:12:39,125 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:39,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:12:39,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:39,181 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:39,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:39,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361963405] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:12:39,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:12:39,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2025-04-13 20:12:39,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138335392] [2025-04-13 20:12:39,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:12:39,241 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-13 20:12:39,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:39,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-13 20:12:39,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-04-13 20:12:39,242 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:39,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 1309 flow. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:39,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:39,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:39,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:40,055 INFO L116 PetriNetUnfolderBase]: 2251/3235 cut-off events. [2025-04-13 20:12:40,055 INFO L117 PetriNetUnfolderBase]: For 33526/33526 co-relation queries the response was YES. [2025-04-13 20:12:40,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19575 conditions, 3235 events. 2251/3235 cut-off events. For 33526/33526 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14540 event pairs, 338 based on Foata normal form. 12/3247 useless extension candidates. Maximal degree in co-relation 18677. Up to 1184 conditions per place. [2025-04-13 20:12:40,075 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 167 selfloop transitions, 170 changer transitions 1/338 dead transitions. [2025-04-13 20:12:40,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 338 transitions, 4225 flow [2025-04-13 20:12:40,076 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-13 20:12:40,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-13 20:12:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 270 transitions. [2025-04-13 20:12:40,077 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4891304347826087 [2025-04-13 20:12:40,077 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 1309 flow. Second operand 23 states and 270 transitions. [2025-04-13 20:12:40,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 338 transitions, 4225 flow [2025-04-13 20:12:40,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 338 transitions, 3999 flow, removed 29 selfloop flow, removed 4 redundant places. [2025-04-13 20:12:40,151 INFO L231 Difference]: Finished difference. Result has 126 places, 230 transitions, 3418 flow [2025-04-13 20:12:40,152 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1213, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3418, PETRI_PLACES=126, PETRI_TRANSITIONS=230} [2025-04-13 20:12:40,152 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 99 predicate places. [2025-04-13 20:12:40,152 INFO L485 AbstractCegarLoop]: Abstraction has has 126 places, 230 transitions, 3418 flow [2025-04-13 20:12:40,152 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:40,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:40,152 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:40,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-13 20:12:40,352 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:40,353 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:40,353 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:40,353 INFO L85 PathProgramCache]: Analyzing trace with hash 568138057, now seen corresponding path program 4 times [2025-04-13 20:12:40,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:40,353 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98360669] [2025-04-13 20:12:40,353 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:12:40,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:40,356 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:40,362 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:40,363 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:12:40,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:40,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:40,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:40,447 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98360669] [2025-04-13 20:12:40,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98360669] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:40,447 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601096882] [2025-04-13 20:12:40,447 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:12:40,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:40,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:40,449 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) [2025-04-13 20:12:40,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-13 20:12:40,474 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:40,490 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:40,491 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:12:40,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:40,491 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:12:40,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:40,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:40,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601096882] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:12:40,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:12:40,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2025-04-13 20:12:40,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120183878] [2025-04-13 20:12:40,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:12:40,662 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 20:12:40,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:40,663 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 20:12:40,663 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2025-04-13 20:12:40,663 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:40,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 230 transitions, 3418 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:40,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:40,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:40,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:41,442 INFO L116 PetriNetUnfolderBase]: 2476/3613 cut-off events. [2025-04-13 20:12:41,442 INFO L117 PetriNetUnfolderBase]: For 48540/48540 co-relation queries the response was YES. [2025-04-13 20:12:41,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25098 conditions, 3613 events. 2476/3613 cut-off events. For 48540/48540 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 17062 event pairs, 343 based on Foata normal form. 21/3634 useless extension candidates. Maximal degree in co-relation 23938. Up to 1344 conditions per place. [2025-04-13 20:12:41,465 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 220 selfloop transitions, 183 changer transitions 7/410 dead transitions. [2025-04-13 20:12:41,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 410 transitions, 6380 flow [2025-04-13 20:12:41,465 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-13 20:12:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-13 20:12:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 161 transitions. [2025-04-13 20:12:41,466 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2025-04-13 20:12:41,466 INFO L175 Difference]: Start difference. First operand has 126 places, 230 transitions, 3418 flow. Second operand 14 states and 161 transitions. [2025-04-13 20:12:41,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 410 transitions, 6380 flow [2025-04-13 20:12:41,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 410 transitions, 5603 flow, removed 292 selfloop flow, removed 3 redundant places. [2025-04-13 20:12:41,710 INFO L231 Difference]: Finished difference. Result has 147 places, 299 transitions, 4581 flow [2025-04-13 20:12:41,710 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2815, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4581, PETRI_PLACES=147, PETRI_TRANSITIONS=299} [2025-04-13 20:12:41,710 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 120 predicate places. [2025-04-13 20:12:41,710 INFO L485 AbstractCegarLoop]: Abstraction has has 147 places, 299 transitions, 4581 flow [2025-04-13 20:12:41,711 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:41,711 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:41,711 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:41,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-04-13 20:12:41,911 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-04-13 20:12:41,911 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:41,912 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1913446090, now seen corresponding path program 5 times [2025-04-13 20:12:41,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:41,912 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311514538] [2025-04-13 20:12:41,912 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:12:41,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:41,916 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:41,920 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:41,920 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:41,920 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:42,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:42,028 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311514538] [2025-04-13 20:12:42,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311514538] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:42,028 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238740310] [2025-04-13 20:12:42,028 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:12:42,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:42,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:42,032 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) [2025-04-13 20:12:42,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-13 20:12:42,059 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:42,073 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:42,073 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:42,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:42,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:12:42,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:42,136 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:42,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238740310] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:42,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:12:42,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 14 [2025-04-13 20:12:42,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980205177] [2025-04-13 20:12:42,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:42,218 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:12:42,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:42,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:12:42,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-04-13 20:12:42,218 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:42,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 299 transitions, 4581 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:42,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:42,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:42,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:42,671 INFO L116 PetriNetUnfolderBase]: 2467/3604 cut-off events. [2025-04-13 20:12:42,671 INFO L117 PetriNetUnfolderBase]: For 55332/55332 co-relation queries the response was YES. [2025-04-13 20:12:42,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26614 conditions, 3604 events. 2467/3604 cut-off events. For 55332/55332 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17182 event pairs, 711 based on Foata normal form. 6/3610 useless extension candidates. Maximal degree in co-relation 25706. Up to 1778 conditions per place. [2025-04-13 20:12:42,698 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 242 selfloop transitions, 89 changer transitions 0/331 dead transitions. [2025-04-13 20:12:42,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 331 transitions, 5491 flow [2025-04-13 20:12:42,698 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:12:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:12:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 81 transitions. [2025-04-13 20:12:42,699 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-04-13 20:12:42,699 INFO L175 Difference]: Start difference. First operand has 147 places, 299 transitions, 4581 flow. Second operand 6 states and 81 transitions. [2025-04-13 20:12:42,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 331 transitions, 5491 flow [2025-04-13 20:12:42,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 331 transitions, 5301 flow, removed 94 selfloop flow, removed 1 redundant places. [2025-04-13 20:12:42,895 INFO L231 Difference]: Finished difference. Result has 154 places, 301 transitions, 4646 flow [2025-04-13 20:12:42,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4646, PETRI_PLACES=154, PETRI_TRANSITIONS=301} [2025-04-13 20:12:42,896 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 127 predicate places. [2025-04-13 20:12:42,896 INFO L485 AbstractCegarLoop]: Abstraction has has 154 places, 301 transitions, 4646 flow [2025-04-13 20:12:42,896 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:42,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:42,896 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:42,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-04-13 20:12:43,096 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:43,097 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:43,097 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:43,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1730333639, now seen corresponding path program 5 times [2025-04-13 20:12:43,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:43,097 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657360436] [2025-04-13 20:12:43,097 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:12:43,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:43,100 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:43,108 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:43,108 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:43,108 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:43,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:43,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:43,235 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657360436] [2025-04-13 20:12:43,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657360436] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:43,235 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951365141] [2025-04-13 20:12:43,235 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:12:43,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:43,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:43,237 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) [2025-04-13 20:12:43,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-13 20:12:43,277 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:43,291 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:43,291 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:43,291 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:43,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:12:43,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:43,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:43,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951365141] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:43,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:12:43,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 17 [2025-04-13 20:12:43,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538312821] [2025-04-13 20:12:43,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:43,492 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:12:43,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:43,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:12:43,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-04-13 20:12:43,493 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:43,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 301 transitions, 4646 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:43,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:43,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:43,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:44,132 INFO L116 PetriNetUnfolderBase]: 2893/4268 cut-off events. [2025-04-13 20:12:44,132 INFO L117 PetriNetUnfolderBase]: For 65364/65364 co-relation queries the response was YES. [2025-04-13 20:12:44,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31292 conditions, 4268 events. 2893/4268 cut-off events. For 65364/65364 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 21271 event pairs, 328 based on Foata normal form. 4/4272 useless extension candidates. Maximal degree in co-relation 30654. Up to 1517 conditions per place. [2025-04-13 20:12:44,157 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 332 selfloop transitions, 154 changer transitions 2/488 dead transitions. [2025-04-13 20:12:44,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 488 transitions, 7837 flow [2025-04-13 20:12:44,158 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-13 20:12:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-13 20:12:44,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2025-04-13 20:12:44,158 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2025-04-13 20:12:44,159 INFO L175 Difference]: Start difference. First operand has 154 places, 301 transitions, 4646 flow. Second operand 9 states and 124 transitions. [2025-04-13 20:12:44,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 488 transitions, 7837 flow [2025-04-13 20:12:44,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 488 transitions, 7739 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-04-13 20:12:44,364 INFO L231 Difference]: Finished difference. Result has 167 places, 373 transitions, 6363 flow [2025-04-13 20:12:44,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6363, PETRI_PLACES=167, PETRI_TRANSITIONS=373} [2025-04-13 20:12:44,364 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 140 predicate places. [2025-04-13 20:12:44,364 INFO L485 AbstractCegarLoop]: Abstraction has has 167 places, 373 transitions, 6363 flow [2025-04-13 20:12:44,364 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:44,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:44,364 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:44,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-13 20:12:44,565 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-04-13 20:12:44,565 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:44,565 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:44,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1245484975, now seen corresponding path program 6 times [2025-04-13 20:12:44,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:44,566 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708049015] [2025-04-13 20:12:44,566 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:12:44,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:44,569 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:44,574 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:44,574 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:12:44,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:44,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:44,675 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708049015] [2025-04-13 20:12:44,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708049015] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:44,675 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591436552] [2025-04-13 20:12:44,676 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:12:44,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:44,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:44,678 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) [2025-04-13 20:12:44,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-13 20:12:44,706 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:44,724 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:44,724 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:12:44,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:44,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:12:44,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:44,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:44,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:45,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591436552] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:12:45,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:12:45,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-04-13 20:12:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011170779] [2025-04-13 20:12:45,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:12:45,103 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 20:12:45,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:45,103 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 20:12:45,103 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2025-04-13 20:12:45,104 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:45,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 373 transitions, 6363 flow. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:45,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:45,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:45,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:46,395 INFO L116 PetriNetUnfolderBase]: 4438/6577 cut-off events. [2025-04-13 20:12:46,395 INFO L117 PetriNetUnfolderBase]: For 125598/125598 co-relation queries the response was YES. [2025-04-13 20:12:46,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50626 conditions, 6577 events. 4438/6577 cut-off events. For 125598/125598 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 36734 event pairs, 243 based on Foata normal form. 39/6616 useless extension candidates. Maximal degree in co-relation 49281. Up to 2376 conditions per place. [2025-04-13 20:12:46,447 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 568 selfloop transitions, 358 changer transitions 3/929 dead transitions. [2025-04-13 20:12:46,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 929 transitions, 15549 flow [2025-04-13 20:12:46,448 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 20:12:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 20:12:46,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 278 transitions. [2025-04-13 20:12:46,449 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5265151515151515 [2025-04-13 20:12:46,449 INFO L175 Difference]: Start difference. First operand has 167 places, 373 transitions, 6363 flow. Second operand 22 states and 278 transitions. [2025-04-13 20:12:46,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 929 transitions, 15549 flow [2025-04-13 20:12:46,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 929 transitions, 15225 flow, removed 133 selfloop flow, removed 1 redundant places. [2025-04-13 20:12:46,981 INFO L231 Difference]: Finished difference. Result has 204 places, 542 transitions, 10482 flow [2025-04-13 20:12:46,982 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10482, PETRI_PLACES=204, PETRI_TRANSITIONS=542} [2025-04-13 20:12:46,982 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 177 predicate places. [2025-04-13 20:12:46,982 INFO L485 AbstractCegarLoop]: Abstraction has has 204 places, 542 transitions, 10482 flow [2025-04-13 20:12:46,982 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:46,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:46,982 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:46,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-13 20:12:47,183 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-13 20:12:47,183 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:47,183 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:47,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1103969752, now seen corresponding path program 6 times [2025-04-13 20:12:47,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:47,184 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614107081] [2025-04-13 20:12:47,184 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:12:47,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:47,186 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:47,190 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:47,191 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:12:47,191 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:47,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:47,295 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614107081] [2025-04-13 20:12:47,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614107081] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:47,295 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831243109] [2025-04-13 20:12:47,295 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:12:47,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:47,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:47,297 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) [2025-04-13 20:12:47,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-13 20:12:47,325 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:47,343 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:47,343 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:12:47,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:47,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:12:47,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:47,407 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:47,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831243109] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:47,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:12:47,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 15 [2025-04-13 20:12:47,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529728775] [2025-04-13 20:12:47,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:47,475 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:12:47,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:47,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:12:47,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:12:47,476 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:47,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 542 transitions, 10482 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:47,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:47,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:47,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:48,525 INFO L116 PetriNetUnfolderBase]: 4428/6546 cut-off events. [2025-04-13 20:12:48,525 INFO L117 PetriNetUnfolderBase]: For 146901/146901 co-relation queries the response was YES. [2025-04-13 20:12:48,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55497 conditions, 6546 events. 4428/6546 cut-off events. For 146901/146901 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 35592 event pairs, 1090 based on Foata normal form. 13/6559 useless extension candidates. Maximal degree in co-relation 54528. Up to 3402 conditions per place. [2025-04-13 20:12:48,584 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 450 selfloop transitions, 132 changer transitions 0/582 dead transitions. [2025-04-13 20:12:48,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 582 transitions, 12080 flow [2025-04-13 20:12:48,584 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:12:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:12:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 80 transitions. [2025-04-13 20:12:48,585 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2025-04-13 20:12:48,585 INFO L175 Difference]: Start difference. First operand has 204 places, 542 transitions, 10482 flow. Second operand 6 states and 80 transitions. [2025-04-13 20:12:48,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 582 transitions, 12080 flow [2025-04-13 20:12:49,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 582 transitions, 11606 flow, removed 150 selfloop flow, removed 3 redundant places. [2025-04-13 20:12:49,390 INFO L231 Difference]: Finished difference. Result has 205 places, 544 transitions, 10354 flow [2025-04-13 20:12:49,390 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10042, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10354, PETRI_PLACES=205, PETRI_TRANSITIONS=544} [2025-04-13 20:12:49,391 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 178 predicate places. [2025-04-13 20:12:49,391 INFO L485 AbstractCegarLoop]: Abstraction has has 205 places, 544 transitions, 10354 flow [2025-04-13 20:12:49,391 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:49,391 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:49,391 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:49,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-13 20:12:49,591 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-13 20:12:49,591 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:49,592 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1865104981, now seen corresponding path program 7 times [2025-04-13 20:12:49,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:49,592 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188898407] [2025-04-13 20:12:49,592 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:12:49,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:49,595 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:12:49,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:49,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:12:49,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:49,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:49,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:49,681 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188898407] [2025-04-13 20:12:49,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188898407] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:49,681 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246786708] [2025-04-13 20:12:49,681 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:12:49,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:49,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:49,683 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) [2025-04-13 20:12:49,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-13 20:12:49,714 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:12:49,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:49,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:12:49,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:49,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 20:12:49,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:49,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:50,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246786708] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:12:50,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:12:50,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 20:12:50,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917684619] [2025-04-13 20:12:50,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:12:50,074 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 20:12:50,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:50,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 20:12:50,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:12:50,074 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:50,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 544 transitions, 10354 flow. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:50,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:50,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:50,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:51,416 INFO L116 PetriNetUnfolderBase]: 4694/7022 cut-off events. [2025-04-13 20:12:51,417 INFO L117 PetriNetUnfolderBase]: For 140967/140967 co-relation queries the response was YES. [2025-04-13 20:12:51,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57515 conditions, 7022 events. 4694/7022 cut-off events. For 140967/140967 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39324 event pairs, 1128 based on Foata normal form. 18/7040 useless extension candidates. Maximal degree in co-relation 56795. Up to 3705 conditions per place. [2025-04-13 20:12:51,476 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 393 selfloop transitions, 331 changer transitions 0/724 dead transitions. [2025-04-13 20:12:51,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 724 transitions, 13979 flow [2025-04-13 20:12:51,476 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-13 20:12:51,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-13 20:12:51,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2025-04-13 20:12:51,477 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2025-04-13 20:12:51,477 INFO L175 Difference]: Start difference. First operand has 205 places, 544 transitions, 10354 flow. Second operand 11 states and 141 transitions. [2025-04-13 20:12:51,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 724 transitions, 13979 flow [2025-04-13 20:12:52,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 724 transitions, 13695 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-04-13 20:12:52,157 INFO L231 Difference]: Finished difference. Result has 214 places, 564 transitions, 11417 flow [2025-04-13 20:12:52,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10080, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11417, PETRI_PLACES=214, PETRI_TRANSITIONS=564} [2025-04-13 20:12:52,157 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 187 predicate places. [2025-04-13 20:12:52,157 INFO L485 AbstractCegarLoop]: Abstraction has has 214 places, 564 transitions, 11417 flow [2025-04-13 20:12:52,158 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:52,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:52,158 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:52,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-13 20:12:52,358 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-13 20:12:52,358 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:52,358 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:52,359 INFO L85 PathProgramCache]: Analyzing trace with hash -516231269, now seen corresponding path program 8 times [2025-04-13 20:12:52,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:52,359 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103196747] [2025-04-13 20:12:52,359 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:12:52,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:52,361 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:52,367 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:52,367 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:52,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:52,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:52,453 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103196747] [2025-04-13 20:12:52,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103196747] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:52,454 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390739374] [2025-04-13 20:12:52,454 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:12:52,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:52,456 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) [2025-04-13 20:12:52,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-13 20:12:52,482 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:52,503 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:52,503 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:12:52,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:52,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:12:52,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:52,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:52,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390739374] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:12:52,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:12:52,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2025-04-13 20:12:52,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440981561] [2025-04-13 20:12:52,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:12:52,744 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 20:12:52,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:52,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 20:12:52,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:12:52,745 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:52,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 564 transitions, 11417 flow. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:52,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:52,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:52,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:54,340 INFO L116 PetriNetUnfolderBase]: 4817/7221 cut-off events. [2025-04-13 20:12:54,340 INFO L117 PetriNetUnfolderBase]: For 160949/160949 co-relation queries the response was YES. [2025-04-13 20:12:54,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60468 conditions, 7221 events. 4817/7221 cut-off events. For 160949/160949 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 41615 event pairs, 504 based on Foata normal form. 29/7250 useless extension candidates. Maximal degree in co-relation 59850. Up to 2419 conditions per place. [2025-04-13 20:12:54,397 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 667 selfloop transitions, 237 changer transitions 1/905 dead transitions. [2025-04-13 20:12:54,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 905 transitions, 17579 flow [2025-04-13 20:12:54,397 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-13 20:12:54,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-13 20:12:54,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 216 transitions. [2025-04-13 20:12:54,400 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2025-04-13 20:12:54,400 INFO L175 Difference]: Start difference. First operand has 214 places, 564 transitions, 11417 flow. Second operand 19 states and 216 transitions. [2025-04-13 20:12:54,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 905 transitions, 17579 flow [2025-04-13 20:12:54,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 905 transitions, 17052 flow, removed 33 selfloop flow, removed 5 redundant places. [2025-04-13 20:12:54,986 INFO L231 Difference]: Finished difference. Result has 238 places, 605 transitions, 12261 flow [2025-04-13 20:12:54,986 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=10893, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=12261, PETRI_PLACES=238, PETRI_TRANSITIONS=605} [2025-04-13 20:12:54,986 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 211 predicate places. [2025-04-13 20:12:54,986 INFO L485 AbstractCegarLoop]: Abstraction has has 238 places, 605 transitions, 12261 flow [2025-04-13 20:12:54,986 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:54,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:54,987 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:54,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-13 20:12:55,187 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:55,187 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:55,187 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -6269589, now seen corresponding path program 9 times [2025-04-13 20:12:55,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:55,188 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037410205] [2025-04-13 20:12:55,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:12:55,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:55,190 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:55,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:55,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:12:55,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:55,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:55,281 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037410205] [2025-04-13 20:12:55,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037410205] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:55,281 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481519332] [2025-04-13 20:12:55,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:12:55,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:55,283 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) [2025-04-13 20:12:55,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-13 20:12:55,309 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:12:55,325 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:55,325 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:12:55,326 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:55,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:12:55,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:55,369 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:55,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481519332] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:12:55,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:12:55,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-04-13 20:12:55,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194108664] [2025-04-13 20:12:55,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:12:55,478 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 20:12:55,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:55,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 20:12:55,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2025-04-13 20:12:55,479 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:55,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 605 transitions, 12261 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:55,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:55,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:55,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:12:57,286 INFO L116 PetriNetUnfolderBase]: 5595/8295 cut-off events. [2025-04-13 20:12:57,286 INFO L117 PetriNetUnfolderBase]: For 186854/186854 co-relation queries the response was YES. [2025-04-13 20:12:57,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71301 conditions, 8295 events. 5595/8295 cut-off events. For 186854/186854 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 46867 event pairs, 1152 based on Foata normal form. 64/8359 useless extension candidates. Maximal degree in co-relation 70619. Up to 5839 conditions per place. [2025-04-13 20:12:57,364 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 468 selfloop transitions, 441 changer transitions 0/909 dead transitions. [2025-04-13 20:12:57,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 909 transitions, 19090 flow [2025-04-13 20:12:57,365 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-13 20:12:57,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-13 20:12:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 173 transitions. [2025-04-13 20:12:57,366 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42401960784313725 [2025-04-13 20:12:57,366 INFO L175 Difference]: Start difference. First operand has 238 places, 605 transitions, 12261 flow. Second operand 17 states and 173 transitions. [2025-04-13 20:12:57,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 909 transitions, 19090 flow [2025-04-13 20:12:58,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 909 transitions, 18681 flow, removed 40 selfloop flow, removed 5 redundant places. [2025-04-13 20:12:58,491 INFO L231 Difference]: Finished difference. Result has 261 places, 774 transitions, 16625 flow [2025-04-13 20:12:58,491 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=11930, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=16625, PETRI_PLACES=261, PETRI_TRANSITIONS=774} [2025-04-13 20:12:58,492 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 234 predicate places. [2025-04-13 20:12:58,492 INFO L485 AbstractCegarLoop]: Abstraction has has 261 places, 774 transitions, 16625 flow [2025-04-13 20:12:58,492 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:58,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:12:58,492 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:12:58,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-04-13 20:12:58,692 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-04-13 20:12:58,693 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:12:58,693 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:12:58,693 INFO L85 PathProgramCache]: Analyzing trace with hash 344911204, now seen corresponding path program 7 times [2025-04-13 20:12:58,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:12:58,693 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774057270] [2025-04-13 20:12:58,693 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:12:58,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:12:58,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:12:58,698 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:58,699 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:12:58,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:58,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:58,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:12:58,781 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774057270] [2025-04-13 20:12:58,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774057270] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:58,781 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137096885] [2025-04-13 20:12:58,781 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:12:58,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:12:58,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:12:58,783 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) [2025-04-13 20:12:58,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-13 20:12:58,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:12:58,829 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:12:58,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:12:58,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:12:58,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 20:12:58,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:12:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:58,884 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:12:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:12:58,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137096885] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:12:58,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:12:58,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 11 [2025-04-13 20:12:58,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108964793] [2025-04-13 20:12:58,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:12:58,947 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:12:58,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:12:58,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:12:58,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-04-13 20:12:58,947 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:12:58,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 774 transitions, 16625 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:12:58,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:12:58,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:12:58,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:00,453 INFO L116 PetriNetUnfolderBase]: 5582/8282 cut-off events. [2025-04-13 20:13:00,453 INFO L117 PetriNetUnfolderBase]: For 201826/201826 co-relation queries the response was YES. [2025-04-13 20:13:00,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76184 conditions, 8282 events. 5582/8282 cut-off events. For 201826/201826 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 46842 event pairs, 1284 based on Foata normal form. 13/8295 useless extension candidates. Maximal degree in co-relation 75832. Up to 4000 conditions per place. [2025-04-13 20:13:00,533 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 629 selfloop transitions, 193 changer transitions 0/822 dead transitions. [2025-04-13 20:13:00,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 822 transitions, 18824 flow [2025-04-13 20:13:00,533 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:13:00,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:13:00,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2025-04-13 20:13:00,534 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2025-04-13 20:13:00,534 INFO L175 Difference]: Start difference. First operand has 261 places, 774 transitions, 16625 flow. Second operand 6 states and 79 transitions. [2025-04-13 20:13:00,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 822 transitions, 18824 flow [2025-04-13 20:13:01,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 822 transitions, 18304 flow, removed 260 selfloop flow, removed 0 redundant places. [2025-04-13 20:13:01,815 INFO L231 Difference]: Finished difference. Result has 269 places, 779 transitions, 16704 flow [2025-04-13 20:13:01,816 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=16105, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=774, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16704, PETRI_PLACES=269, PETRI_TRANSITIONS=779} [2025-04-13 20:13:01,816 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 242 predicate places. [2025-04-13 20:13:01,816 INFO L485 AbstractCegarLoop]: Abstraction has has 269 places, 779 transitions, 16704 flow [2025-04-13 20:13:01,816 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:01,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:01,816 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:01,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-04-13 20:13:02,017 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:02,017 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:13:02,017 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:02,017 INFO L85 PathProgramCache]: Analyzing trace with hash 787415030, now seen corresponding path program 8 times [2025-04-13 20:13:02,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:02,017 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413332204] [2025-04-13 20:13:02,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:13:02,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:02,020 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:02,023 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:02,023 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:13:02,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:02,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:02,130 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413332204] [2025-04-13 20:13:02,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413332204] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:13:02,131 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188550978] [2025-04-13 20:13:02,131 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:13:02,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:02,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:13:02,133 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) [2025-04-13 20:13:02,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-04-13 20:13:02,158 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:02,174 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:02,174 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:13:02,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:02,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:13:02,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:13:02,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:02,234 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:13:02,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:02,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188550978] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:13:02,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:13:02,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 15 [2025-04-13 20:13:02,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606205312] [2025-04-13 20:13:02,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:13:02,284 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-13 20:13:02,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:02,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-13 20:13:02,285 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:13:02,285 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:13:02,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 779 transitions, 16704 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:02,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:02,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:13:02,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:03,904 INFO L116 PetriNetUnfolderBase]: 5566/8250 cut-off events. [2025-04-13 20:13:03,905 INFO L117 PetriNetUnfolderBase]: For 199819/199819 co-relation queries the response was YES. [2025-04-13 20:13:03,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75988 conditions, 8250 events. 5566/8250 cut-off events. For 199819/199819 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 46542 event pairs, 1285 based on Foata normal form. 12/8262 useless extension candidates. Maximal degree in co-relation 75632. Up to 4000 conditions per place. [2025-04-13 20:13:03,987 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 632 selfloop transitions, 190 changer transitions 0/822 dead transitions. [2025-04-13 20:13:03,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 822 transitions, 18777 flow [2025-04-13 20:13:03,988 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:13:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:13:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 80 transitions. [2025-04-13 20:13:03,989 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2025-04-13 20:13:03,989 INFO L175 Difference]: Start difference. First operand has 269 places, 779 transitions, 16704 flow. Second operand 6 states and 80 transitions. [2025-04-13 20:13:03,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 822 transitions, 18777 flow [2025-04-13 20:13:05,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 822 transitions, 18424 flow, removed 14 selfloop flow, removed 3 redundant places. [2025-04-13 20:13:05,217 INFO L231 Difference]: Finished difference. Result has 271 places, 778 transitions, 16712 flow [2025-04-13 20:13:05,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=16332, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=16712, PETRI_PLACES=271, PETRI_TRANSITIONS=778} [2025-04-13 20:13:05,218 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 244 predicate places. [2025-04-13 20:13:05,218 INFO L485 AbstractCegarLoop]: Abstraction has has 271 places, 778 transitions, 16712 flow [2025-04-13 20:13:05,218 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:05,218 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:05,218 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:05,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-04-13 20:13:05,419 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:05,419 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:13:05,419 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1054643475, now seen corresponding path program 10 times [2025-04-13 20:13:05,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:05,420 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134727086] [2025-04-13 20:13:05,420 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:13:05,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:05,423 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:05,426 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:05,426 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:13:05,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:05,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:05,495 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134727086] [2025-04-13 20:13:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134727086] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:13:05,496 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903684096] [2025-04-13 20:13:05,496 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:13:05,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:13:05,499 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) [2025-04-13 20:13:05,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-04-13 20:13:05,529 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:05,542 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:05,543 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:13:05,543 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:05,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:13:05,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:13:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:05,620 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:13:05,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:05,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903684096] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:13:05,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:13:05,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 15 [2025-04-13 20:13:05,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852882036] [2025-04-13 20:13:05,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:13:05,747 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 20:13:05,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:05,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 20:13:05,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:13:05,748 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:13:05,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 778 transitions, 16712 flow. Second operand has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:05,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:05,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:13:05,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:07,629 INFO L116 PetriNetUnfolderBase]: 5756/8522 cut-off events. [2025-04-13 20:13:07,629 INFO L117 PetriNetUnfolderBase]: For 220115/220115 co-relation queries the response was YES. [2025-04-13 20:13:07,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79022 conditions, 8522 events. 5756/8522 cut-off events. For 220115/220115 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 48736 event pairs, 1082 based on Foata normal form. 68/8590 useless extension candidates. Maximal degree in co-relation 78667. Up to 6074 conditions per place. [2025-04-13 20:13:07,701 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 700 selfloop transitions, 394 changer transitions 0/1094 dead transitions. [2025-04-13 20:13:07,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1094 transitions, 24198 flow [2025-04-13 20:13:07,702 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-13 20:13:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-13 20:13:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 191 transitions. [2025-04-13 20:13:07,702 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44212962962962965 [2025-04-13 20:13:07,702 INFO L175 Difference]: Start difference. First operand has 271 places, 778 transitions, 16712 flow. Second operand 18 states and 191 transitions. [2025-04-13 20:13:07,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1094 transitions, 24198 flow [2025-04-13 20:13:08,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1094 transitions, 23713 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-04-13 20:13:08,697 INFO L231 Difference]: Finished difference. Result has 297 places, 916 transitions, 20647 flow [2025-04-13 20:13:08,698 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=16331, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=20647, PETRI_PLACES=297, PETRI_TRANSITIONS=916} [2025-04-13 20:13:08,698 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 270 predicate places. [2025-04-13 20:13:08,698 INFO L485 AbstractCegarLoop]: Abstraction has has 297 places, 916 transitions, 20647 flow [2025-04-13 20:13:08,698 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.2) internal successors, (78), 15 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:08,698 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:08,698 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:08,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-04-13 20:13:08,898 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:08,899 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:13:08,899 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash -495232445, now seen corresponding path program 11 times [2025-04-13 20:13:08,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:08,899 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851001102] [2025-04-13 20:13:08,899 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:13:08,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:08,901 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:08,905 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:08,905 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:13:08,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:09,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:09,005 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851001102] [2025-04-13 20:13:09,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851001102] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:13:09,005 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394601532] [2025-04-13 20:13:09,005 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:13:09,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:09,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:13:09,008 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) [2025-04-13 20:13:09,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-04-13 20:13:09,038 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:09,054 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:09,054 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:13:09,054 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:09,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:13:09,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:13:09,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:09,089 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:13:09,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394601532] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:13:09,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:13:09,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-04-13 20:13:09,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378188710] [2025-04-13 20:13:09,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:13:09,090 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:13:09,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:09,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:13:09,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-04-13 20:13:09,090 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:13:09,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 916 transitions, 20647 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:09,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:09,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:13:09,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:11,019 INFO L116 PetriNetUnfolderBase]: 5816/8648 cut-off events. [2025-04-13 20:13:11,020 INFO L117 PetriNetUnfolderBase]: For 234466/234466 co-relation queries the response was YES. [2025-04-13 20:13:11,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83568 conditions, 8648 events. 5816/8648 cut-off events. For 234466/234466 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 49259 event pairs, 879 based on Foata normal form. 18/8666 useless extension candidates. Maximal degree in co-relation 83156. Up to 3584 conditions per place. [2025-04-13 20:13:11,121 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 493 selfloop transitions, 522 changer transitions 12/1027 dead transitions. [2025-04-13 20:13:11,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 1027 transitions, 24733 flow [2025-04-13 20:13:11,121 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:13:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:13:11,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2025-04-13 20:13:11,122 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2025-04-13 20:13:11,122 INFO L175 Difference]: Start difference. First operand has 297 places, 916 transitions, 20647 flow. Second operand 7 states and 80 transitions. [2025-04-13 20:13:11,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 1027 transitions, 24733 flow [2025-04-13 20:13:12,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1027 transitions, 23986 flow, removed 263 selfloop flow, removed 2 redundant places. [2025-04-13 20:13:12,630 INFO L231 Difference]: Finished difference. Result has 305 places, 931 transitions, 21694 flow [2025-04-13 20:13:12,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=19927, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=916, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=507, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21694, PETRI_PLACES=305, PETRI_TRANSITIONS=931} [2025-04-13 20:13:12,632 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 278 predicate places. [2025-04-13 20:13:12,632 INFO L485 AbstractCegarLoop]: Abstraction has has 305 places, 931 transitions, 21694 flow [2025-04-13 20:13:12,632 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:12,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:12,632 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:12,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-04-13 20:13:12,833 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:12,833 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:13:12,833 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -893087061, now seen corresponding path program 12 times [2025-04-13 20:13:12,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:12,834 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516624796] [2025-04-13 20:13:12,834 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:13:12,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:12,837 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:12,841 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:12,841 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:13:12,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:12,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:12,920 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516624796] [2025-04-13 20:13:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516624796] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:13:12,920 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320610918] [2025-04-13 20:13:12,920 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:13:12,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:12,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:13:12,922 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) [2025-04-13 20:13:12,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-04-13 20:13:12,949 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:12,965 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:12,965 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:13:12,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:12,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:13:12,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:13:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:12,985 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:13:12,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320610918] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:13:12,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:13:12,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-04-13 20:13:12,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473833045] [2025-04-13 20:13:12,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:13:12,986 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:13:12,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:12,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:13:12,986 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:13:12,986 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:13:12,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 931 transitions, 21694 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:12,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:12,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:13:12,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:14,873 INFO L116 PetriNetUnfolderBase]: 5799/8617 cut-off events. [2025-04-13 20:13:14,873 INFO L117 PetriNetUnfolderBase]: For 251652/251652 co-relation queries the response was YES. [2025-04-13 20:13:14,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83713 conditions, 8617 events. 5799/8617 cut-off events. For 251652/251652 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 49383 event pairs, 1131 based on Foata normal form. 3/8620 useless extension candidates. Maximal degree in co-relation 83485. Up to 4831 conditions per place. [2025-04-13 20:13:14,974 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 780 selfloop transitions, 229 changer transitions 5/1014 dead transitions. [2025-04-13 20:13:14,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1014 transitions, 24752 flow [2025-04-13 20:13:14,974 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:13:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:13:14,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2025-04-13 20:13:14,975 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2025-04-13 20:13:14,975 INFO L175 Difference]: Start difference. First operand has 305 places, 931 transitions, 21694 flow. Second operand 7 states and 85 transitions. [2025-04-13 20:13:14,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1014 transitions, 24752 flow [2025-04-13 20:13:16,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1014 transitions, 23917 flow, removed 16 selfloop flow, removed 3 redundant places. [2025-04-13 20:13:16,522 INFO L231 Difference]: Finished difference. Result has 310 places, 934 transitions, 21468 flow [2025-04-13 20:13:16,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=20863, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21468, PETRI_PLACES=310, PETRI_TRANSITIONS=934} [2025-04-13 20:13:16,523 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 283 predicate places. [2025-04-13 20:13:16,523 INFO L485 AbstractCegarLoop]: Abstraction has has 310 places, 934 transitions, 21468 flow [2025-04-13 20:13:16,524 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:16,524 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:16,524 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:16,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-04-13 20:13:16,727 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2025-04-13 20:13:16,727 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:13:16,728 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:16,728 INFO L85 PathProgramCache]: Analyzing trace with hash 2125775269, now seen corresponding path program 13 times [2025-04-13 20:13:16,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:16,728 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114311167] [2025-04-13 20:13:16,728 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:13:16,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:16,731 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:13:16,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:16,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:13:16,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:16,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:16,812 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114311167] [2025-04-13 20:13:16,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114311167] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:13:16,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:13:16,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 20:13:16,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984721211] [2025-04-13 20:13:16,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:13:16,812 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:13:16,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:16,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:13:16,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:13:16,813 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:13:16,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 934 transitions, 21468 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:16,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:16,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:13:16,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:18,773 INFO L116 PetriNetUnfolderBase]: 5929/8907 cut-off events. [2025-04-13 20:13:18,773 INFO L117 PetriNetUnfolderBase]: For 253490/253490 co-relation queries the response was YES. [2025-04-13 20:13:18,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86113 conditions, 8907 events. 5929/8907 cut-off events. For 253490/253490 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 52478 event pairs, 1563 based on Foata normal form. 39/8946 useless extension candidates. Maximal degree in co-relation 85873. Up to 7701 conditions per place. [2025-04-13 20:13:18,875 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 791 selfloop transitions, 228 changer transitions 10/1029 dead transitions. [2025-04-13 20:13:18,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1029 transitions, 25177 flow [2025-04-13 20:13:18,876 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:13:18,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:13:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2025-04-13 20:13:18,876 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2025-04-13 20:13:18,876 INFO L175 Difference]: Start difference. First operand has 310 places, 934 transitions, 21468 flow. Second operand 7 states and 79 transitions. [2025-04-13 20:13:18,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1029 transitions, 25177 flow [2025-04-13 20:13:20,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 1029 transitions, 24718 flow, removed 16 selfloop flow, removed 4 redundant places. [2025-04-13 20:13:20,595 INFO L231 Difference]: Finished difference. Result has 313 places, 953 transitions, 22071 flow [2025-04-13 20:13:20,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=21050, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=725, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22071, PETRI_PLACES=313, PETRI_TRANSITIONS=953} [2025-04-13 20:13:20,595 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 286 predicate places. [2025-04-13 20:13:20,595 INFO L485 AbstractCegarLoop]: Abstraction has has 313 places, 953 transitions, 22071 flow [2025-04-13 20:13:20,596 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:20,596 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:20,596 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:20,596 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2025-04-13 20:13:20,596 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:13:20,596 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:20,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1449134135, now seen corresponding path program 14 times [2025-04-13 20:13:20,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:20,596 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039474664] [2025-04-13 20:13:20,596 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:13:20,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:20,598 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:20,602 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:20,602 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:13:20,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:20,681 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039474664] [2025-04-13 20:13:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039474664] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:13:20,681 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569729734] [2025-04-13 20:13:20,681 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:13:20,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:13:20,683 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) [2025-04-13 20:13:20,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-04-13 20:13:20,709 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:20,724 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:20,725 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:13:20,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:20,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:13:20,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:13:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:20,777 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:13:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:20,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569729734] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:13:20,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:13:20,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2025-04-13 20:13:20,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771112912] [2025-04-13 20:13:20,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:13:20,907 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 20:13:20,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:20,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 20:13:20,907 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2025-04-13 20:13:20,907 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:13:20,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 953 transitions, 22071 flow. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:20,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:20,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:13:20,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:23,263 INFO L116 PetriNetUnfolderBase]: 5914/8864 cut-off events. [2025-04-13 20:13:23,263 INFO L117 PetriNetUnfolderBase]: For 251351/251351 co-relation queries the response was YES. [2025-04-13 20:13:23,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85793 conditions, 8864 events. 5914/8864 cut-off events. For 251351/251351 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 52169 event pairs, 609 based on Foata normal form. 37/8901 useless extension candidates. Maximal degree in co-relation 85562. Up to 2978 conditions per place. [2025-04-13 20:13:23,351 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 879 selfloop transitions, 328 changer transitions 1/1208 dead transitions. [2025-04-13 20:13:23,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1208 transitions, 27916 flow [2025-04-13 20:13:23,351 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 20:13:23,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 20:13:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 225 transitions. [2025-04-13 20:13:23,352 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2025-04-13 20:13:23,352 INFO L175 Difference]: Start difference. First operand has 313 places, 953 transitions, 22071 flow. Second operand 21 states and 225 transitions. [2025-04-13 20:13:23,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1208 transitions, 27916 flow [2025-04-13 20:13:24,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1208 transitions, 27613 flow, removed 24 selfloop flow, removed 3 redundant places. [2025-04-13 20:13:24,992 INFO L231 Difference]: Finished difference. Result has 337 places, 984 transitions, 23270 flow [2025-04-13 20:13:24,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=21670, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=23270, PETRI_PLACES=337, PETRI_TRANSITIONS=984} [2025-04-13 20:13:24,993 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 310 predicate places. [2025-04-13 20:13:24,993 INFO L485 AbstractCegarLoop]: Abstraction has has 337 places, 984 transitions, 23270 flow [2025-04-13 20:13:24,998 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:24,998 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:24,998 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:25,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-04-13 20:13:25,198 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-04-13 20:13:25,198 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:13:25,199 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:25,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1807209917, now seen corresponding path program 15 times [2025-04-13 20:13:25,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:25,199 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782002499] [2025-04-13 20:13:25,199 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:13:25,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:25,204 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:25,211 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:25,212 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:13:25,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:25,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:25,329 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782002499] [2025-04-13 20:13:25,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782002499] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:13:25,330 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930313175] [2025-04-13 20:13:25,330 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:13:25,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:25,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:13:25,332 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) [2025-04-13 20:13:25,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-04-13 20:13:25,364 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:25,385 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:25,385 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:13:25,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:25,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:13:25,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:13:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:25,435 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:13:25,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930313175] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:13:25,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:13:25,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-04-13 20:13:25,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568434673] [2025-04-13 20:13:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:13:25,436 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:13:25,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:25,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:13:25,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:13:25,436 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:13:25,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 984 transitions, 23270 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:25,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:25,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:13:25,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:27,620 INFO L116 PetriNetUnfolderBase]: 5916/8895 cut-off events. [2025-04-13 20:13:27,620 INFO L117 PetriNetUnfolderBase]: For 263452/263452 co-relation queries the response was YES. [2025-04-13 20:13:27,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87678 conditions, 8895 events. 5916/8895 cut-off events. For 263452/263452 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 52403 event pairs, 1147 based on Foata normal form. 9/8904 useless extension candidates. Maximal degree in co-relation 87322. Up to 4890 conditions per place. [2025-04-13 20:13:27,713 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 815 selfloop transitions, 242 changer transitions 7/1064 dead transitions. [2025-04-13 20:13:27,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1064 transitions, 26308 flow [2025-04-13 20:13:27,713 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:13:27,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:13:27,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2025-04-13 20:13:27,714 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2025-04-13 20:13:27,714 INFO L175 Difference]: Start difference. First operand has 337 places, 984 transitions, 23270 flow. Second operand 7 states and 88 transitions. [2025-04-13 20:13:27,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1064 transitions, 26308 flow [2025-04-13 20:13:29,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1064 transitions, 25458 flow, removed 153 selfloop flow, removed 7 redundant places. [2025-04-13 20:13:29,345 INFO L231 Difference]: Finished difference. Result has 338 places, 982 transitions, 22869 flow [2025-04-13 20:13:29,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=22420, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22869, PETRI_PLACES=338, PETRI_TRANSITIONS=982} [2025-04-13 20:13:29,346 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 311 predicate places. [2025-04-13 20:13:29,346 INFO L485 AbstractCegarLoop]: Abstraction has has 338 places, 982 transitions, 22869 flow [2025-04-13 20:13:29,346 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:29,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:29,346 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:29,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-04-13 20:13:29,546 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-04-13 20:13:29,547 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:13:29,547 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:29,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1463848936, now seen corresponding path program 9 times [2025-04-13 20:13:29,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:29,547 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823862119] [2025-04-13 20:13:29,547 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:13:29,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:29,550 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:29,554 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:29,554 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:13:29,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:29,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:29,657 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823862119] [2025-04-13 20:13:29,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823862119] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:13:29,657 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863446750] [2025-04-13 20:13:29,657 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:13:29,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:13:29,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:13:29,659 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) [2025-04-13 20:13:29,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-04-13 20:13:29,692 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:13:29,714 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:13:29,714 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:13:29,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:29,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:13:29,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:13:29,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:29,779 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:13:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:13:29,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863446750] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:13:29,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:13:29,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2025-04-13 20:13:29,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743977196] [2025-04-13 20:13:29,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:13:29,879 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 20:13:29,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:29,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 20:13:29,880 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:13:29,880 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:13:29,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 982 transitions, 22869 flow. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:29,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:29,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:13:29,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:31,969 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-13 20:13:36,898 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-13 20:14:01,359 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-13 20:14:04,146 INFO L116 PetriNetUnfolderBase]: 7169/10650 cut-off events. [2025-04-13 20:14:04,146 INFO L117 PetriNetUnfolderBase]: For 307446/307446 co-relation queries the response was YES. [2025-04-13 20:14:04,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102388 conditions, 10650 events. 7169/10650 cut-off events. For 307446/307446 co-relation queries the response was YES. Maximal size of possible extension queue 713. Compared 63563 event pairs, 1077 based on Foata normal form. 22/10672 useless extension candidates. Maximal degree in co-relation 102161. Up to 5147 conditions per place. [2025-04-13 20:14:04,260 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 666 selfloop transitions, 720 changer transitions 0/1386 dead transitions. [2025-04-13 20:14:04,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1386 transitions, 32137 flow [2025-04-13 20:14:04,261 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-13 20:14:04,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-13 20:14:04,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 336 transitions. [2025-04-13 20:14:04,263 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4827586206896552 [2025-04-13 20:14:04,263 INFO L175 Difference]: Start difference. First operand has 338 places, 982 transitions, 22869 flow. Second operand 29 states and 336 transitions. [2025-04-13 20:14:04,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1386 transitions, 32137 flow [2025-04-13 20:14:06,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1386 transitions, 31723 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-04-13 20:14:06,246 INFO L231 Difference]: Finished difference. Result has 375 places, 1170 transitions, 28983 flow [2025-04-13 20:14:06,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=22461, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=28983, PETRI_PLACES=375, PETRI_TRANSITIONS=1170} [2025-04-13 20:14:06,247 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 348 predicate places. [2025-04-13 20:14:06,247 INFO L485 AbstractCegarLoop]: Abstraction has has 375 places, 1170 transitions, 28983 flow [2025-04-13 20:14:06,247 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:06,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:14:06,247 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:14:06,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-04-13 20:14:06,447 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:06,448 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:14:06,448 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:14:06,448 INFO L85 PathProgramCache]: Analyzing trace with hash 414341706, now seen corresponding path program 10 times [2025-04-13 20:14:06,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:14:06,448 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074353063] [2025-04-13 20:14:06,448 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:14:06,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:14:06,451 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:06,453 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:06,453 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:14:06,453 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:06,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:06,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:14:06,510 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074353063] [2025-04-13 20:14:06,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074353063] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:14:06,510 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891465169] [2025-04-13 20:14:06,510 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:14:06,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:06,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:14:06,512 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) [2025-04-13 20:14:06,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-04-13 20:14:06,540 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:06,556 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:06,556 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:14:06,556 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:06,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 20:14:06,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:14:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:06,623 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:14:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:06,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891465169] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:14:06,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:14:06,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2025-04-13 20:14:06,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240195880] [2025-04-13 20:14:06,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:14:06,825 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-13 20:14:06,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:14:06,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-13 20:14:06,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-04-13 20:14:06,826 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:14:06,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1170 transitions, 28983 flow. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:06,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:14:06,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:14:06,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:14:10,204 INFO L116 PetriNetUnfolderBase]: 7600/11486 cut-off events. [2025-04-13 20:14:10,205 INFO L117 PetriNetUnfolderBase]: For 391775/391775 co-relation queries the response was YES. [2025-04-13 20:14:10,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119542 conditions, 11486 events. 7600/11486 cut-off events. For 391775/391775 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 71743 event pairs, 1159 based on Foata normal form. 20/11506 useless extension candidates. Maximal degree in co-relation 119163. Up to 5317 conditions per place. [2025-04-13 20:14:10,476 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 700 selfloop transitions, 760 changer transitions 3/1463 dead transitions. [2025-04-13 20:14:10,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1463 transitions, 37176 flow [2025-04-13 20:14:10,477 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-13 20:14:10,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-13 20:14:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 212 transitions. [2025-04-13 20:14:10,478 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5196078431372549 [2025-04-13 20:14:10,478 INFO L175 Difference]: Start difference. First operand has 375 places, 1170 transitions, 28983 flow. Second operand 17 states and 212 transitions. [2025-04-13 20:14:10,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1463 transitions, 37176 flow [2025-04-13 20:14:13,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 1463 transitions, 36121 flow, removed 329 selfloop flow, removed 3 redundant places. [2025-04-13 20:14:13,676 INFO L231 Difference]: Finished difference. Result has 397 places, 1263 transitions, 33169 flow [2025-04-13 20:14:13,677 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=28012, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=671, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=33169, PETRI_PLACES=397, PETRI_TRANSITIONS=1263} [2025-04-13 20:14:13,678 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 370 predicate places. [2025-04-13 20:14:13,678 INFO L485 AbstractCegarLoop]: Abstraction has has 397 places, 1263 transitions, 33169 flow [2025-04-13 20:14:13,678 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:13,678 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:14:13,678 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:14:13,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-04-13 20:14:13,878 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-04-13 20:14:13,879 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:14:13,879 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:14:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1771767612, now seen corresponding path program 3 times [2025-04-13 20:14:13,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:14:13,879 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13134787] [2025-04-13 20:14:13,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:14:13,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:14:13,882 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:13,886 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:13,886 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:14:13,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:13,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:13,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:14:13,973 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13134787] [2025-04-13 20:14:13,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13134787] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:14:13,973 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688322243] [2025-04-13 20:14:13,973 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:14:13,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:13,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:14:13,975 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) [2025-04-13 20:14:13,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-04-13 20:14:14,001 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:14,021 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:14,021 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:14:14,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:14,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:14:14,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:14:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:14,061 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:14:14,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688322243] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:14:14,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:14:14,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-04-13 20:14:14,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391608133] [2025-04-13 20:14:14,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:14:14,061 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:14:14,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:14:14,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:14:14,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-04-13 20:14:14,062 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:14:14,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1263 transitions, 33169 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:14,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:14:14,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:14:14,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:14:17,776 INFO L116 PetriNetUnfolderBase]: 7604/11527 cut-off events. [2025-04-13 20:14:17,776 INFO L117 PetriNetUnfolderBase]: For 441251/441251 co-relation queries the response was YES. [2025-04-13 20:14:17,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124095 conditions, 11527 events. 7604/11527 cut-off events. For 441251/441251 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 72342 event pairs, 1893 based on Foata normal form. 28/11555 useless extension candidates. Maximal degree in co-relation 123706. Up to 10316 conditions per place. [2025-04-13 20:14:17,984 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 1097 selfloop transitions, 217 changer transitions 13/1327 dead transitions. [2025-04-13 20:14:17,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1327 transitions, 36552 flow [2025-04-13 20:14:17,985 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:14:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:14:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2025-04-13 20:14:17,985 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2025-04-13 20:14:17,985 INFO L175 Difference]: Start difference. First operand has 397 places, 1263 transitions, 33169 flow. Second operand 7 states and 87 transitions. [2025-04-13 20:14:17,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1327 transitions, 36552 flow [2025-04-13 20:14:22,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1327 transitions, 36202 flow, removed 46 selfloop flow, removed 4 redundant places. [2025-04-13 20:14:22,080 INFO L231 Difference]: Finished difference. Result has 402 places, 1263 transitions, 33279 flow [2025-04-13 20:14:22,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=32788, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=33279, PETRI_PLACES=402, PETRI_TRANSITIONS=1263} [2025-04-13 20:14:22,082 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 375 predicate places. [2025-04-13 20:14:22,082 INFO L485 AbstractCegarLoop]: Abstraction has has 402 places, 1263 transitions, 33279 flow [2025-04-13 20:14:22,082 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:22,082 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:14:22,082 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:14:22,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-04-13 20:14:22,284 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-04-13 20:14:22,284 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:14:22,284 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:14:22,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1004737898, now seen corresponding path program 11 times [2025-04-13 20:14:22,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:14:22,284 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472770092] [2025-04-13 20:14:22,284 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:14:22,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:14:22,287 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:22,289 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:22,289 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:14:22,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:22,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:14:22,428 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472770092] [2025-04-13 20:14:22,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472770092] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:14:22,428 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035288888] [2025-04-13 20:14:22,428 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:14:22,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:22,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:14:22,431 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) [2025-04-13 20:14:22,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-04-13 20:14:22,458 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:22,472 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:22,472 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:14:22,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:22,473 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:14:22,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:14:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:22,504 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:14:22,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035288888] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:14:22,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:14:22,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 10 [2025-04-13 20:14:22,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958316187] [2025-04-13 20:14:22,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:14:22,505 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:14:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:14:22,505 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:14:22,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-04-13 20:14:22,505 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:14:22,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1263 transitions, 33279 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:22,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:14:22,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:14:22,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:14:25,519 INFO L116 PetriNetUnfolderBase]: 7576/11472 cut-off events. [2025-04-13 20:14:25,519 INFO L117 PetriNetUnfolderBase]: For 437733/437733 co-relation queries the response was YES. [2025-04-13 20:14:25,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123645 conditions, 11472 events. 7576/11472 cut-off events. For 437733/437733 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 71797 event pairs, 1902 based on Foata normal form. 2/11474 useless extension candidates. Maximal degree in co-relation 123279. Up to 10432 conditions per place. [2025-04-13 20:14:25,672 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1090 selfloop transitions, 214 changer transitions 2/1306 dead transitions. [2025-04-13 20:14:25,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 1306 transitions, 36436 flow [2025-04-13 20:14:25,672 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:14:25,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:14:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2025-04-13 20:14:25,673 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-04-13 20:14:25,673 INFO L175 Difference]: Start difference. First operand has 402 places, 1263 transitions, 33279 flow. Second operand 7 states and 77 transitions. [2025-04-13 20:14:25,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 1306 transitions, 36436 flow [2025-04-13 20:14:29,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1306 transitions, 35981 flow, removed 14 selfloop flow, removed 4 redundant places. [2025-04-13 20:14:29,698 INFO L231 Difference]: Finished difference. Result has 405 places, 1268 transitions, 33410 flow [2025-04-13 20:14:29,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=32831, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1052, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=33410, PETRI_PLACES=405, PETRI_TRANSITIONS=1268} [2025-04-13 20:14:29,699 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 378 predicate places. [2025-04-13 20:14:29,699 INFO L485 AbstractCegarLoop]: Abstraction has has 405 places, 1268 transitions, 33410 flow [2025-04-13 20:14:29,699 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:29,699 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:14:29,699 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:14:29,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-04-13 20:14:29,900 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:29,900 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:14:29,900 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:14:29,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1111876390, now seen corresponding path program 12 times [2025-04-13 20:14:29,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:14:29,901 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731975484] [2025-04-13 20:14:29,901 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:14:29,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:14:29,903 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:29,906 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:29,906 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:14:29,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:29,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:14:29,975 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731975484] [2025-04-13 20:14:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731975484] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:14:29,975 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466983211] [2025-04-13 20:14:29,975 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:14:29,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:29,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:14:29,977 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) [2025-04-13 20:14:29,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-04-13 20:14:30,000 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:30,020 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:30,020 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:14:30,020 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:30,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:14:30,022 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:14:30,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:30,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:14:30,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:30,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466983211] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:14:30,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:14:30,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 13 [2025-04-13 20:14:30,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550074868] [2025-04-13 20:14:30,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:14:30,138 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 20:14:30,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:14:30,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 20:14:30,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:14:30,139 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:14:30,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1268 transitions, 33410 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:30,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:14:30,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:14:30,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:14:33,667 INFO L116 PetriNetUnfolderBase]: 7647/11603 cut-off events. [2025-04-13 20:14:33,668 INFO L117 PetriNetUnfolderBase]: For 444422/444422 co-relation queries the response was YES. [2025-04-13 20:14:33,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125088 conditions, 11603 events. 7647/11603 cut-off events. For 444422/444422 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 73178 event pairs, 1518 based on Foata normal form. 12/11615 useless extension candidates. Maximal degree in co-relation 124688. Up to 8618 conditions per place. [2025-04-13 20:14:33,798 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 983 selfloop transitions, 451 changer transitions 4/1438 dead transitions. [2025-04-13 20:14:33,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1438 transitions, 39331 flow [2025-04-13 20:14:33,799 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 20:14:33,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 20:14:33,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2025-04-13 20:14:33,799 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4826388888888889 [2025-04-13 20:14:33,799 INFO L175 Difference]: Start difference. First operand has 405 places, 1268 transitions, 33410 flow. Second operand 12 states and 139 transitions. [2025-04-13 20:14:33,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1438 transitions, 39331 flow [2025-04-13 20:14:37,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 1438 transitions, 38933 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-13 20:14:37,584 INFO L231 Difference]: Finished difference. Result has 417 places, 1313 transitions, 35281 flow [2025-04-13 20:14:37,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=33014, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=832, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=35281, PETRI_PLACES=417, PETRI_TRANSITIONS=1313} [2025-04-13 20:14:37,585 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 390 predicate places. [2025-04-13 20:14:37,585 INFO L485 AbstractCegarLoop]: Abstraction has has 417 places, 1313 transitions, 35281 flow [2025-04-13 20:14:37,585 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:37,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:14:37,585 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:14:37,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-04-13 20:14:37,785 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:37,786 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:14:37,786 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:14:37,786 INFO L85 PathProgramCache]: Analyzing trace with hash 944250554, now seen corresponding path program 4 times [2025-04-13 20:14:37,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:14:37,786 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091894331] [2025-04-13 20:14:37,786 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:14:37,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:14:37,788 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:37,791 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:37,791 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:14:37,791 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:37,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:14:37,852 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091894331] [2025-04-13 20:14:37,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091894331] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:14:37,852 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104609747] [2025-04-13 20:14:37,852 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:14:37,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:37,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:14:37,855 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) [2025-04-13 20:14:37,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-04-13 20:14:37,882 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:37,898 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:37,898 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:14:37,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:37,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-13 20:14:37,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:14:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:37,950 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:14:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:38,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104609747] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:14:38,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:14:38,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 20:14:38,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974414598] [2025-04-13 20:14:38,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:14:38,016 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 20:14:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:14:38,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 20:14:38,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:14:38,016 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:14:38,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1313 transitions, 35281 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:38,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:14:38,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:14:38,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:14:41,525 INFO L116 PetriNetUnfolderBase]: 7645/11597 cut-off events. [2025-04-13 20:14:41,525 INFO L117 PetriNetUnfolderBase]: For 461982/461982 co-relation queries the response was YES. [2025-04-13 20:14:41,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127411 conditions, 11597 events. 7645/11597 cut-off events. For 461982/461982 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 72969 event pairs, 1923 based on Foata normal form. 12/11609 useless extension candidates. Maximal degree in co-relation 127007. Up to 10470 conditions per place. [2025-04-13 20:14:41,669 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 1135 selfloop transitions, 228 changer transitions 0/1363 dead transitions. [2025-04-13 20:14:41,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 1363 transitions, 38550 flow [2025-04-13 20:14:41,669 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:14:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:14:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2025-04-13 20:14:41,670 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2025-04-13 20:14:41,670 INFO L175 Difference]: Start difference. First operand has 417 places, 1313 transitions, 35281 flow. Second operand 7 states and 83 transitions. [2025-04-13 20:14:41,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 1363 transitions, 38550 flow [2025-04-13 20:14:45,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 1363 transitions, 38015 flow, removed 71 selfloop flow, removed 5 redundant places. [2025-04-13 20:14:45,688 INFO L231 Difference]: Finished difference. Result has 419 places, 1316 transitions, 35287 flow [2025-04-13 20:14:45,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=34747, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1086, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=35287, PETRI_PLACES=419, PETRI_TRANSITIONS=1316} [2025-04-13 20:14:45,689 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 392 predicate places. [2025-04-13 20:14:45,689 INFO L485 AbstractCegarLoop]: Abstraction has has 419 places, 1316 transitions, 35287 flow [2025-04-13 20:14:45,690 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:45,690 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:14:45,690 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:14:45,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2025-04-13 20:14:45,890 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:45,890 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:14:45,891 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:14:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1586488770, now seen corresponding path program 5 times [2025-04-13 20:14:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:14:45,891 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482118161] [2025-04-13 20:14:45,891 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:14:45,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:14:45,893 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:45,895 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:45,895 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:14:45,895 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:45,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:14:45,951 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482118161] [2025-04-13 20:14:45,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482118161] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:14:45,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:14:45,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 20:14:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329558529] [2025-04-13 20:14:45,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:14:45,951 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:14:45,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:14:45,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:14:45,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:14:45,952 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:14:45,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1316 transitions, 35287 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:45,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:14:45,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:14:45,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:14:49,513 INFO L116 PetriNetUnfolderBase]: 7619/11561 cut-off events. [2025-04-13 20:14:49,513 INFO L117 PetriNetUnfolderBase]: For 456527/456527 co-relation queries the response was YES. [2025-04-13 20:14:49,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127222 conditions, 11561 events. 7619/11561 cut-off events. For 456527/456527 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 72757 event pairs, 1937 based on Foata normal form. 20/11581 useless extension candidates. Maximal degree in co-relation 126810. Up to 10468 conditions per place. [2025-04-13 20:14:49,646 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 1140 selfloop transitions, 208 changer transitions 14/1362 dead transitions. [2025-04-13 20:14:49,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 1362 transitions, 38422 flow [2025-04-13 20:14:49,646 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:14:49,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:14:49,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2025-04-13 20:14:49,647 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-04-13 20:14:49,647 INFO L175 Difference]: Start difference. First operand has 419 places, 1316 transitions, 35287 flow. Second operand 6 states and 78 transitions. [2025-04-13 20:14:49,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 1362 transitions, 38422 flow [2025-04-13 20:14:53,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 1362 transitions, 37968 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-04-13 20:14:53,508 INFO L231 Difference]: Finished difference. Result has 420 places, 1306 transitions, 34943 flow [2025-04-13 20:14:53,509 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=34661, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=34943, PETRI_PLACES=420, PETRI_TRANSITIONS=1306} [2025-04-13 20:14:53,509 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 393 predicate places. [2025-04-13 20:14:53,509 INFO L485 AbstractCegarLoop]: Abstraction has has 420 places, 1306 transitions, 34943 flow [2025-04-13 20:14:53,509 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:53,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:14:53,510 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:14:53,510 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-04-13 20:14:53,510 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:14:53,510 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:14:53,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1154413949, now seen corresponding path program 16 times [2025-04-13 20:14:53,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:14:53,510 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714155456] [2025-04-13 20:14:53,510 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:14:53,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:14:53,512 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:53,515 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:53,515 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:14:53,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:53,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:14:53,603 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714155456] [2025-04-13 20:14:53,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714155456] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:14:53,603 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123588728] [2025-04-13 20:14:53,603 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:14:53,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:14:53,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:14:53,605 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) [2025-04-13 20:14:53,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-04-13 20:14:53,636 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:14:53,650 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:14:53,650 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:14:53,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:53,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:14:53,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:14:53,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:53,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:14:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:14:53,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123588728] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:14:53,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:14:53,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-04-13 20:14:53,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162015827] [2025-04-13 20:14:53,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:14:53,823 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-13 20:14:53,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:14:53,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-13 20:14:53,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2025-04-13 20:14:53,824 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:14:53,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1306 transitions, 34943 flow. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:53,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:14:53,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:14:53,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:14:57,537 INFO L116 PetriNetUnfolderBase]: 7627/11545 cut-off events. [2025-04-13 20:14:57,538 INFO L117 PetriNetUnfolderBase]: For 455129/455129 co-relation queries the response was YES. [2025-04-13 20:14:57,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127273 conditions, 11545 events. 7627/11545 cut-off events. For 455129/455129 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 72288 event pairs, 1472 based on Foata normal form. 16/11561 useless extension candidates. Maximal degree in co-relation 126861. Up to 6616 conditions per place. [2025-04-13 20:14:57,685 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 783 selfloop transitions, 635 changer transitions 0/1418 dead transitions. [2025-04-13 20:14:57,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 1418 transitions, 39420 flow [2025-04-13 20:14:57,686 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-13 20:14:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-13 20:14:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2025-04-13 20:14:57,686 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5037878787878788 [2025-04-13 20:14:57,686 INFO L175 Difference]: Start difference. First operand has 420 places, 1306 transitions, 34943 flow. Second operand 11 states and 133 transitions. [2025-04-13 20:14:57,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 1418 transitions, 39420 flow [2025-04-13 20:15:01,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1418 transitions, 38986 flow, removed 3 selfloop flow, removed 4 redundant places. [2025-04-13 20:15:01,726 INFO L231 Difference]: Finished difference. Result has 427 places, 1319 transitions, 36234 flow [2025-04-13 20:15:01,727 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=34521, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=622, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=36234, PETRI_PLACES=427, PETRI_TRANSITIONS=1319} [2025-04-13 20:15:01,727 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 400 predicate places. [2025-04-13 20:15:01,727 INFO L485 AbstractCegarLoop]: Abstraction has has 427 places, 1319 transitions, 36234 flow [2025-04-13 20:15:01,727 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:01,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:15:01,727 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:15:01,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-04-13 20:15:01,928 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:15:01,928 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:15:01,929 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:15:01,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1456118538, now seen corresponding path program 13 times [2025-04-13 20:15:01,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:15:01,929 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546830375] [2025-04-13 20:15:01,929 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:15:01,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:15:01,932 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:15:01,934 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:15:01,934 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:15:01,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:15:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:02,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:15:02,002 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546830375] [2025-04-13 20:15:02,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546830375] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:15:02,003 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052314160] [2025-04-13 20:15:02,003 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:15:02,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:15:02,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:15:02,005 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) [2025-04-13 20:15:02,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-04-13 20:15:02,033 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:15:02,053 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:15:02,053 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:15:02,053 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:15:02,055 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:15:02,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:15:02,126 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:02,126 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:15:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:02,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052314160] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:15:02,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:15:02,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-04-13 20:15:02,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571656307] [2025-04-13 20:15:02,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:15:02,238 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 20:15:02,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:15:02,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 20:15:02,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:15:02,238 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:15:02,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1319 transitions, 36234 flow. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:02,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:15:02,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:15:02,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:15:06,566 INFO L116 PetriNetUnfolderBase]: 8704/12949 cut-off events. [2025-04-13 20:15:06,566 INFO L117 PetriNetUnfolderBase]: For 535440/535440 co-relation queries the response was YES. [2025-04-13 20:15:06,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145346 conditions, 12949 events. 8704/12949 cut-off events. For 535440/535440 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 80108 event pairs, 1673 based on Foata normal form. 14/12963 useless extension candidates. Maximal degree in co-relation 144932. Up to 10129 conditions per place. [2025-04-13 20:15:06,734 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1142 selfloop transitions, 535 changer transitions 0/1677 dead transitions. [2025-04-13 20:15:06,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 1677 transitions, 46826 flow [2025-04-13 20:15:06,734 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 20:15:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 20:15:06,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 250 transitions. [2025-04-13 20:15:06,735 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2025-04-13 20:15:06,735 INFO L175 Difference]: Start difference. First operand has 427 places, 1319 transitions, 36234 flow. Second operand 22 states and 250 transitions. [2025-04-13 20:15:06,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 1677 transitions, 46826 flow [2025-04-13 20:15:11,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1677 transitions, 46014 flow, removed 7 selfloop flow, removed 7 redundant places. [2025-04-13 20:15:11,651 INFO L231 Difference]: Finished difference. Result has 454 places, 1491 transitions, 41302 flow [2025-04-13 20:15:11,652 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=35498, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=869, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=41302, PETRI_PLACES=454, PETRI_TRANSITIONS=1491} [2025-04-13 20:15:11,652 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 427 predicate places. [2025-04-13 20:15:11,652 INFO L485 AbstractCegarLoop]: Abstraction has has 454 places, 1491 transitions, 41302 flow [2025-04-13 20:15:11,652 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:11,652 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:15:11,652 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:15:11,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-04-13 20:15:11,856 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2025-04-13 20:15:11,857 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:15:11,857 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:15:11,857 INFO L85 PathProgramCache]: Analyzing trace with hash -593200817, now seen corresponding path program 17 times [2025-04-13 20:15:11,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:15:11,857 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580699017] [2025-04-13 20:15:11,857 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:15:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:15:11,859 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:15:11,862 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:15:11,862 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:15:11,862 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:15:11,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:11,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:15:11,973 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580699017] [2025-04-13 20:15:11,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580699017] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:15:11,973 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525006633] [2025-04-13 20:15:11,973 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:15:11,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:15:11,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:15:11,975 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:15:11,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-04-13 20:15:12,003 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:15:12,026 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:15:12,027 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:15:12,027 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:15:12,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:15:12,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:15:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:12,103 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:15:12,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:12,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525006633] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:15:12,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:15:12,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2025-04-13 20:15:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759985807] [2025-04-13 20:15:12,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:15:12,218 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-13 20:15:12,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:15:12,218 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-13 20:15:12,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2025-04-13 20:15:12,218 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:15:12,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1491 transitions, 41302 flow. Second operand has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:12,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:15:12,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:15:12,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:15:16,949 INFO L116 PetriNetUnfolderBase]: 9125/13527 cut-off events. [2025-04-13 20:15:16,950 INFO L117 PetriNetUnfolderBase]: For 609125/609125 co-relation queries the response was YES. [2025-04-13 20:15:17,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157174 conditions, 13527 events. 9125/13527 cut-off events. For 609125/609125 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 83784 event pairs, 1777 based on Foata normal form. 18/13545 useless extension candidates. Maximal degree in co-relation 156741. Up to 10367 conditions per place. [2025-04-13 20:15:17,122 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1304 selfloop transitions, 502 changer transitions 0/1806 dead transitions. [2025-04-13 20:15:17,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1806 transitions, 50908 flow [2025-04-13 20:15:17,123 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-13 20:15:17,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-13 20:15:17,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 223 transitions. [2025-04-13 20:15:17,124 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.48903508771929827 [2025-04-13 20:15:17,124 INFO L175 Difference]: Start difference. First operand has 454 places, 1491 transitions, 41302 flow. Second operand 19 states and 223 transitions. [2025-04-13 20:15:17,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1806 transitions, 50908 flow [2025-04-13 20:15:23,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 1806 transitions, 49918 flow, removed 479 selfloop flow, removed 1 redundant places. [2025-04-13 20:15:23,492 INFO L231 Difference]: Finished difference. Result has 481 places, 1611 transitions, 45229 flow [2025-04-13 20:15:23,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=40542, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=45229, PETRI_PLACES=481, PETRI_TRANSITIONS=1611} [2025-04-13 20:15:23,494 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 454 predicate places. [2025-04-13 20:15:23,494 INFO L485 AbstractCegarLoop]: Abstraction has has 481 places, 1611 transitions, 45229 flow [2025-04-13 20:15:23,494 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.0) internal successors, (85), 17 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:23,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:15:23,494 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:15:23,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2025-04-13 20:15:23,694 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2025-04-13 20:15:23,694 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:15:23,695 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:15:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash -771518959, now seen corresponding path program 18 times [2025-04-13 20:15:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:15:23,695 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278683425] [2025-04-13 20:15:23,695 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:15:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:15:23,698 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:15:23,702 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:15:23,702 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:15:23,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:15:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:23,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:15:23,786 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278683425] [2025-04-13 20:15:23,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278683425] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:15:23,786 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936903551] [2025-04-13 20:15:23,786 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:15:23,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:15:23,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:15:23,788 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:15:23,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-04-13 20:15:23,812 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:15:23,827 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:15:23,827 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:15:23,827 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:15:23,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:15:23,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:15:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:23,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:15:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:24,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936903551] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:15:24,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:15:24,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2025-04-13 20:15:24,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555791] [2025-04-13 20:15:24,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:15:24,005 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 20:15:24,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:15:24,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 20:15:24,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:15:24,005 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:15:24,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 1611 transitions, 45229 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:24,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:15:24,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:15:24,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:15:29,098 INFO L116 PetriNetUnfolderBase]: 9285/13755 cut-off events. [2025-04-13 20:15:29,098 INFO L117 PetriNetUnfolderBase]: For 631368/631368 co-relation queries the response was YES. [2025-04-13 20:15:29,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162263 conditions, 13755 events. 9285/13755 cut-off events. For 631368/631368 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 85330 event pairs, 1797 based on Foata normal form. 49/13804 useless extension candidates. Maximal degree in co-relation 161808. Up to 10517 conditions per place. [2025-04-13 20:15:29,472 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1337 selfloop transitions, 547 changer transitions 0/1884 dead transitions. [2025-04-13 20:15:29,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 1884 transitions, 54489 flow [2025-04-13 20:15:29,472 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-13 20:15:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-13 20:15:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 220 transitions. [2025-04-13 20:15:29,473 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4824561403508772 [2025-04-13 20:15:29,473 INFO L175 Difference]: Start difference. First operand has 481 places, 1611 transitions, 45229 flow. Second operand 19 states and 220 transitions. [2025-04-13 20:15:29,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 1884 transitions, 54489 flow [2025-04-13 20:15:35,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1884 transitions, 53583 flow, removed 342 selfloop flow, removed 3 redundant places. [2025-04-13 20:15:35,481 INFO L231 Difference]: Finished difference. Result has 499 places, 1684 transitions, 48022 flow [2025-04-13 20:15:35,482 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=44308, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=48022, PETRI_PLACES=499, PETRI_TRANSITIONS=1684} [2025-04-13 20:15:35,482 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 472 predicate places. [2025-04-13 20:15:35,482 INFO L485 AbstractCegarLoop]: Abstraction has has 499 places, 1684 transitions, 48022 flow [2025-04-13 20:15:35,482 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:35,482 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:15:35,482 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:15:35,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2025-04-13 20:15:35,682 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:15:35,683 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:15:35,683 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:15:35,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1324629248, now seen corresponding path program 14 times [2025-04-13 20:15:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:15:35,683 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275594920] [2025-04-13 20:15:35,683 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:15:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:15:35,688 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:15:35,693 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:15:35,694 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:15:35,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:15:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:35,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:15:35,770 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275594920] [2025-04-13 20:15:35,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275594920] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:15:35,770 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946817095] [2025-04-13 20:15:35,770 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:15:35,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:15:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:15:35,772 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:15:35,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-04-13 20:15:35,797 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:15:35,816 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:15:35,816 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:15:35,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:15:35,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:15:35,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:15:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:35,871 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:15:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:35,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946817095] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:15:35,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:15:35,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2025-04-13 20:15:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889903622] [2025-04-13 20:15:35,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:15:35,982 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-13 20:15:35,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:15:35,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-13 20:15:35,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-04-13 20:15:35,982 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:15:35,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1684 transitions, 48022 flow. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:35,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:15:35,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:15:35,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:15:41,324 INFO L116 PetriNetUnfolderBase]: 9512/14046 cut-off events. [2025-04-13 20:15:41,324 INFO L117 PetriNetUnfolderBase]: For 652003/652003 co-relation queries the response was YES. [2025-04-13 20:15:41,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167249 conditions, 14046 events. 9512/14046 cut-off events. For 652003/652003 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 86756 event pairs, 1739 based on Foata normal form. 38/14084 useless extension candidates. Maximal degree in co-relation 166781. Up to 10920 conditions per place. [2025-04-13 20:15:41,526 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1274 selfloop transitions, 681 changer transitions 0/1955 dead transitions. [2025-04-13 20:15:41,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 1955 transitions, 57038 flow [2025-04-13 20:15:41,527 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-13 20:15:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-13 20:15:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 228 transitions. [2025-04-13 20:15:41,527 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-13 20:15:41,527 INFO L175 Difference]: Start difference. First operand has 499 places, 1684 transitions, 48022 flow. Second operand 19 states and 228 transitions. [2025-04-13 20:15:41,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 1955 transitions, 57038 flow [2025-04-13 20:15:48,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1955 transitions, 56198 flow, removed 142 selfloop flow, removed 7 redundant places. [2025-04-13 20:15:48,433 INFO L231 Difference]: Finished difference. Result has 517 places, 1772 transitions, 51003 flow [2025-04-13 20:15:48,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=47184, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=597, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=51003, PETRI_PLACES=517, PETRI_TRANSITIONS=1772} [2025-04-13 20:15:48,435 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 490 predicate places. [2025-04-13 20:15:48,435 INFO L485 AbstractCegarLoop]: Abstraction has has 517 places, 1772 transitions, 51003 flow [2025-04-13 20:15:48,435 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:48,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:15:48,435 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:15:48,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-04-13 20:15:48,635 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-04-13 20:15:48,636 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:15:48,636 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:15:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1648542303, now seen corresponding path program 19 times [2025-04-13 20:15:48,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:15:48,636 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566977458] [2025-04-13 20:15:48,636 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:15:48,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:15:48,638 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:15:48,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:15:48,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:15:48,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:15:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:15:48,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:15:48,705 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566977458] [2025-04-13 20:15:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566977458] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:15:48,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:15:48,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 20:15:48,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506524894] [2025-04-13 20:15:48,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:15:48,705 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:15:48,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:15:48,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:15:48,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:15:48,706 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:15:48,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 1772 transitions, 51003 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:15:48,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:15:48,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:15:48,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:15:54,122 INFO L116 PetriNetUnfolderBase]: 9511/14048 cut-off events. [2025-04-13 20:15:54,123 INFO L117 PetriNetUnfolderBase]: For 675063/675063 co-relation queries the response was YES. [2025-04-13 20:15:54,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170176 conditions, 14048 events. 9511/14048 cut-off events. For 675063/675063 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 86712 event pairs, 2159 based on Foata normal form. 3/14051 useless extension candidates. Maximal degree in co-relation 169707. Up to 12783 conditions per place. [2025-04-13 20:15:54,330 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1533 selfloop transitions, 271 changer transitions 3/1807 dead transitions. [2025-04-13 20:15:54,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 1807 transitions, 54965 flow [2025-04-13 20:15:54,331 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:15:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:15:54,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2025-04-13 20:15:54,331 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2025-04-13 20:15:54,331 INFO L175 Difference]: Start difference. First operand has 517 places, 1772 transitions, 51003 flow. Second operand 7 states and 79 transitions. [2025-04-13 20:15:54,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 1807 transitions, 54965 flow [2025-04-13 20:16:01,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 1807 transitions, 54058 flow, removed 193 selfloop flow, removed 6 redundant places. [2025-04-13 20:16:01,876 INFO L231 Difference]: Finished difference. Result has 519 places, 1772 transitions, 50645 flow [2025-04-13 20:16:01,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=50096, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=50645, PETRI_PLACES=519, PETRI_TRANSITIONS=1772} [2025-04-13 20:16:01,878 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 492 predicate places. [2025-04-13 20:16:01,878 INFO L485 AbstractCegarLoop]: Abstraction has has 519 places, 1772 transitions, 50645 flow [2025-04-13 20:16:01,878 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:01,878 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:01,878 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:16:01,878 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2025-04-13 20:16:01,878 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:16:01,879 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1945932005, now seen corresponding path program 20 times [2025-04-13 20:16:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:01,879 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813754018] [2025-04-13 20:16:01,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:16:01,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:01,882 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:16:01,885 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:16:01,885 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:16:01,885 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:01,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:01,968 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813754018] [2025-04-13 20:16:01,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813754018] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:16:01,968 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701699508] [2025-04-13 20:16:01,968 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:16:01,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:16:01,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:16:01,970 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:16:01,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-04-13 20:16:01,995 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:16:02,014 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:16:02,014 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:16:02,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:02,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:16:02,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:16:02,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:02,063 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:16:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:02,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701699508] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:16:02,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:16:02,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2025-04-13 20:16:02,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473939095] [2025-04-13 20:16:02,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:16:02,173 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 20:16:02,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:02,173 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 20:16:02,173 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2025-04-13 20:16:02,173 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:16:02,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1772 transitions, 50645 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:02,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:02,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:16:02,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:08,293 INFO L116 PetriNetUnfolderBase]: 9646/14316 cut-off events. [2025-04-13 20:16:08,294 INFO L117 PetriNetUnfolderBase]: For 679683/679683 co-relation queries the response was YES. [2025-04-13 20:16:08,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172304 conditions, 14316 events. 9646/14316 cut-off events. For 679683/679683 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 89637 event pairs, 1852 based on Foata normal form. 47/14363 useless extension candidates. Maximal degree in co-relation 171909. Up to 10910 conditions per place. [2025-04-13 20:16:08,484 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1419 selfloop transitions, 585 changer transitions 1/2005 dead transitions. [2025-04-13 20:16:08,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 2005 transitions, 58951 flow [2025-04-13 20:16:08,485 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-13 20:16:08,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-13 20:16:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 258 transitions. [2025-04-13 20:16:08,485 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43 [2025-04-13 20:16:08,485 INFO L175 Difference]: Start difference. First operand has 519 places, 1772 transitions, 50645 flow. Second operand 25 states and 258 transitions. [2025-04-13 20:16:08,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 2005 transitions, 58951 flow [2025-04-13 20:16:15,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 2005 transitions, 58320 flow, removed 12 selfloop flow, removed 5 redundant places. [2025-04-13 20:16:15,636 INFO L231 Difference]: Finished difference. Result has 549 places, 1879 transitions, 54447 flow [2025-04-13 20:16:15,637 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=50060, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=54447, PETRI_PLACES=549, PETRI_TRANSITIONS=1879} [2025-04-13 20:16:15,637 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 522 predicate places. [2025-04-13 20:16:15,637 INFO L485 AbstractCegarLoop]: Abstraction has has 549 places, 1879 transitions, 54447 flow [2025-04-13 20:16:15,638 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:15,638 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:15,638 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:16:15,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2025-04-13 20:16:15,838 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-04-13 20:16:15,838 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:16:15,839 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:15,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1594626730, now seen corresponding path program 15 times [2025-04-13 20:16:15,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:15,839 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481902984] [2025-04-13 20:16:15,839 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:16:15,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:15,841 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:16:15,844 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:16:15,844 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:16:15,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:15,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:15,922 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481902984] [2025-04-13 20:16:15,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481902984] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:16:15,922 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156942318] [2025-04-13 20:16:15,922 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:16:15,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:16:15,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:16:15,924 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:16:15,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-04-13 20:16:15,950 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:16:15,971 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:16:15,972 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:16:15,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:15,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:16:15,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:16:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:16,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:16:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:16,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156942318] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:16:16,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:16:16,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2025-04-13 20:16:16,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656050788] [2025-04-13 20:16:16,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:16:16,120 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-13 20:16:16,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:16,120 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-13 20:16:16,120 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-04-13 20:16:16,120 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:16:16,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 1879 transitions, 54447 flow. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:16,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:16,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:16:16,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:22,199 INFO L116 PetriNetUnfolderBase]: 10044/14952 cut-off events. [2025-04-13 20:16:22,199 INFO L117 PetriNetUnfolderBase]: For 735556/735556 co-relation queries the response was YES. [2025-04-13 20:16:22,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183314 conditions, 14952 events. 10044/14952 cut-off events. For 735556/735556 co-relation queries the response was YES. Maximal size of possible extension queue 1054. Compared 94705 event pairs, 1968 based on Foata normal form. 32/14984 useless extension candidates. Maximal degree in co-relation 182842. Up to 12480 conditions per place. [2025-04-13 20:16:22,607 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1458 selfloop transitions, 705 changer transitions 0/2163 dead transitions. [2025-04-13 20:16:22,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 2163 transitions, 64686 flow [2025-04-13 20:16:22,608 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 20:16:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 20:16:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 235 transitions. [2025-04-13 20:16:22,609 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4662698412698413 [2025-04-13 20:16:22,609 INFO L175 Difference]: Start difference. First operand has 549 places, 1879 transitions, 54447 flow. Second operand 21 states and 235 transitions. [2025-04-13 20:16:22,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 2163 transitions, 64686 flow [2025-04-13 20:16:30,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 2163 transitions, 63875 flow, removed 298 selfloop flow, removed 8 redundant places. [2025-04-13 20:16:30,583 INFO L231 Difference]: Finished difference. Result has 571 places, 2043 transitions, 60261 flow [2025-04-13 20:16:30,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=53699, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=60261, PETRI_PLACES=571, PETRI_TRANSITIONS=2043} [2025-04-13 20:16:30,584 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 544 predicate places. [2025-04-13 20:16:30,584 INFO L485 AbstractCegarLoop]: Abstraction has has 571 places, 2043 transitions, 60261 flow [2025-04-13 20:16:30,584 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:30,584 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:30,584 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:16:30,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-04-13 20:16:30,785 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:16:30,785 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:16:30,785 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:30,785 INFO L85 PathProgramCache]: Analyzing trace with hash -605416314, now seen corresponding path program 16 times [2025-04-13 20:16:30,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:30,785 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422592453] [2025-04-13 20:16:30,786 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:16:30,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:30,787 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:16:30,790 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:16:30,790 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:16:30,790 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:30,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:30,858 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422592453] [2025-04-13 20:16:30,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422592453] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:16:30,858 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664753689] [2025-04-13 20:16:30,858 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:16:30,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:16:30,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:16:30,860 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:16:30,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-04-13 20:16:30,885 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:16:30,905 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:16:30,905 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:16:30,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:30,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:16:30,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:16:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:30,969 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:16:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:31,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664753689] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:16:31,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:16:31,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-04-13 20:16:31,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223536381] [2025-04-13 20:16:31,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:16:31,068 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-13 20:16:31,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:31,068 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-13 20:16:31,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-04-13 20:16:31,069 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:16:31,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 2043 transitions, 60261 flow. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:31,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:31,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:16:31,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:38,039 INFO L116 PetriNetUnfolderBase]: 10106/15077 cut-off events. [2025-04-13 20:16:38,039 INFO L117 PetriNetUnfolderBase]: For 772664/772664 co-relation queries the response was YES. [2025-04-13 20:16:38,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188451 conditions, 15077 events. 10106/15077 cut-off events. For 772664/772664 co-relation queries the response was YES. Maximal size of possible extension queue 1069. Compared 96115 event pairs, 2050 based on Foata normal form. 25/15102 useless extension candidates. Maximal degree in co-relation 187970. Up to 12802 conditions per place. [2025-04-13 20:16:38,287 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1500 selfloop transitions, 678 changer transitions 0/2178 dead transitions. [2025-04-13 20:16:38,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 592 places, 2178 transitions, 66464 flow [2025-04-13 20:16:38,288 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 20:16:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 20:16:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 241 transitions. [2025-04-13 20:16:38,288 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4564393939393939 [2025-04-13 20:16:38,288 INFO L175 Difference]: Start difference. First operand has 571 places, 2043 transitions, 60261 flow. Second operand 22 states and 241 transitions. [2025-04-13 20:16:38,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 592 places, 2178 transitions, 66464 flow [2025-04-13 20:16:46,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 2178 transitions, 65863 flow, removed 222 selfloop flow, removed 6 redundant places. [2025-04-13 20:16:46,879 INFO L231 Difference]: Finished difference. Result has 592 places, 2071 transitions, 61818 flow [2025-04-13 20:16:46,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=59562, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2039, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=647, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=61818, PETRI_PLACES=592, PETRI_TRANSITIONS=2071} [2025-04-13 20:16:46,881 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 565 predicate places. [2025-04-13 20:16:46,881 INFO L485 AbstractCegarLoop]: Abstraction has has 592 places, 2071 transitions, 61818 flow [2025-04-13 20:16:46,881 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:46,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:16:46,881 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:16:46,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-04-13 20:16:47,081 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:16:47,082 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:16:47,082 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:16:47,082 INFO L85 PathProgramCache]: Analyzing trace with hash 38791010, now seen corresponding path program 17 times [2025-04-13 20:16:47,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:16:47,083 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697286722] [2025-04-13 20:16:47,083 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:16:47,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:16:47,085 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:16:47,088 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:16:47,088 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:16:47,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:47,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:47,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:16:47,166 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697286722] [2025-04-13 20:16:47,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697286722] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:16:47,166 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34832313] [2025-04-13 20:16:47,166 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:16:47,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:16:47,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:16:47,168 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:16:47,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-04-13 20:16:47,193 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:16:47,215 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:16:47,215 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:16:47,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:16:47,215 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 20:16:47,216 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:16:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:47,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:16:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:16:47,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34832313] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:16:47,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:16:47,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 13 [2025-04-13 20:16:47,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292936818] [2025-04-13 20:16:47,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:16:47,367 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 20:16:47,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:16:47,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 20:16:47,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:16:47,367 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:16:47,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 2071 transitions, 61818 flow. Second operand has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:16:47,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:16:47,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:16:47,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:16:53,844 INFO L116 PetriNetUnfolderBase]: 10076/15031 cut-off events. [2025-04-13 20:16:53,844 INFO L117 PetriNetUnfolderBase]: For 790945/790945 co-relation queries the response was YES. [2025-04-13 20:16:53,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190145 conditions, 15031 events. 10076/15031 cut-off events. For 790945/790945 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 95708 event pairs, 2044 based on Foata normal form. 30/15061 useless extension candidates. Maximal degree in co-relation 189658. Up to 12473 conditions per place. [2025-04-13 20:16:54,073 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1512 selfloop transitions, 660 changer transitions 0/2172 dead transitions. [2025-04-13 20:16:54,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 2172 transitions, 67874 flow [2025-04-13 20:16:54,074 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 20:16:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 20:16:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2025-04-13 20:16:54,075 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2025-04-13 20:16:54,075 INFO L175 Difference]: Start difference. First operand has 592 places, 2071 transitions, 61818 flow. Second operand 12 states and 136 transitions. [2025-04-13 20:16:54,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 2172 transitions, 67874 flow [2025-04-13 20:17:02,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 592 places, 2172 transitions, 67194 flow, removed 101 selfloop flow, removed 11 redundant places. [2025-04-13 20:17:02,688 INFO L231 Difference]: Finished difference. Result has 598 places, 2101 transitions, 63730 flow [2025-04-13 20:17:02,690 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=61127, PETRI_DIFFERENCE_MINUEND_PLACES=581, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2069, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=628, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=63730, PETRI_PLACES=598, PETRI_TRANSITIONS=2101} [2025-04-13 20:17:02,690 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 571 predicate places. [2025-04-13 20:17:02,690 INFO L485 AbstractCegarLoop]: Abstraction has has 598 places, 2101 transitions, 63730 flow [2025-04-13 20:17:02,690 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.230769230769231) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:17:02,690 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:17:02,691 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:17:02,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2025-04-13 20:17:02,891 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:17:02,891 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:17:02,892 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:17:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1700365306, now seen corresponding path program 18 times [2025-04-13 20:17:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:17:02,892 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886010762] [2025-04-13 20:17:02,892 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:17:02,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:17:02,894 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:17:02,897 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:17:02,897 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:17:02,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:17:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:02,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:17:02,965 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886010762] [2025-04-13 20:17:02,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886010762] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:17:02,965 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652330903] [2025-04-13 20:17:02,965 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:17:02,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:17:02,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:17:02,967 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:17:02,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-04-13 20:17:02,992 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:17:03,011 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:17:03,012 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:17:03,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:17:03,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:17:03,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:17:03,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:03,026 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:17:03,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652330903] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:17:03,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:17:03,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-04-13 20:17:03,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529421165] [2025-04-13 20:17:03,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:17:03,026 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:17:03,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:17:03,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:17:03,027 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:17:03,027 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:17:03,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 598 places, 2101 transitions, 63730 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:17:03,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:17:03,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:17:03,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:17:09,961 INFO L116 PetriNetUnfolderBase]: 10075/15032 cut-off events. [2025-04-13 20:17:09,962 INFO L117 PetriNetUnfolderBase]: For 800342/800342 co-relation queries the response was YES. [2025-04-13 20:17:10,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193325 conditions, 15032 events. 10075/15032 cut-off events. For 800342/800342 co-relation queries the response was YES. Maximal size of possible extension queue 1068. Compared 95546 event pairs, 2317 based on Foata normal form. 2/15034 useless extension candidates. Maximal degree in co-relation 192832. Up to 13661 conditions per place. [2025-04-13 20:17:10,191 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1806 selfloop transitions, 325 changer transitions 2/2133 dead transitions. [2025-04-13 20:17:10,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 2133 transitions, 68335 flow [2025-04-13 20:17:10,192 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:17:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:17:10,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2025-04-13 20:17:10,192 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-04-13 20:17:10,192 INFO L175 Difference]: Start difference. First operand has 598 places, 2101 transitions, 63730 flow. Second operand 7 states and 77 transitions. [2025-04-13 20:17:10,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 2133 transitions, 68335 flow [2025-04-13 20:17:19,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 600 places, 2133 transitions, 67845 flow, removed 69 selfloop flow, removed 4 redundant places. [2025-04-13 20:17:19,666 INFO L231 Difference]: Finished difference. Result has 600 places, 2100 transitions, 63868 flow [2025-04-13 20:17:19,667 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=63240, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1776, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=63868, PETRI_PLACES=600, PETRI_TRANSITIONS=2100} [2025-04-13 20:17:19,668 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 573 predicate places. [2025-04-13 20:17:19,668 INFO L485 AbstractCegarLoop]: Abstraction has has 600 places, 2100 transitions, 63868 flow [2025-04-13 20:17:19,668 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:17:19,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:17:19,668 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:17:19,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2025-04-13 20:17:19,869 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2025-04-13 20:17:19,869 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:17:19,869 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:17:19,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1017740141, now seen corresponding path program 21 times [2025-04-13 20:17:19,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:17:19,870 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892502893] [2025-04-13 20:17:19,870 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:17:19,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:17:19,872 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:17:19,876 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:17:19,876 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:17:19,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:17:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:19,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:17:19,956 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892502893] [2025-04-13 20:17:19,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892502893] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:17:19,956 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174489482] [2025-04-13 20:17:19,956 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:17:19,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:17:19,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:17:19,958 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:17:19,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-04-13 20:17:19,983 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:17:19,998 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:17:19,998 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:17:19,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:17:19,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:17:19,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:17:20,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:20,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:17:20,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:20,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174489482] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:17:20,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:17:20,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 15 [2025-04-13 20:17:20,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907905248] [2025-04-13 20:17:20,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:17:20,190 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 20:17:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:17:20,190 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 20:17:20,190 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:17:20,190 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:17:20,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 2100 transitions, 63868 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:17:20,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:17:20,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:17:20,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:17:27,008 INFO L116 PetriNetUnfolderBase]: 10203/15283 cut-off events. [2025-04-13 20:17:27,008 INFO L117 PetriNetUnfolderBase]: For 812583/812583 co-relation queries the response was YES. [2025-04-13 20:17:27,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196475 conditions, 15283 events. 10203/15283 cut-off events. For 812583/812583 co-relation queries the response was YES. Maximal size of possible extension queue 1087. Compared 98312 event pairs, 1911 based on Foata normal form. 24/15307 useless extension candidates. Maximal degree in co-relation 195981. Up to 11378 conditions per place. [2025-04-13 20:17:27,266 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1526 selfloop transitions, 764 changer transitions 0/2290 dead transitions. [2025-04-13 20:17:27,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 2290 transitions, 71587 flow [2025-04-13 20:17:27,266 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 20:17:27,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 20:17:27,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 238 transitions. [2025-04-13 20:17:27,267 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45075757575757575 [2025-04-13 20:17:27,267 INFO L175 Difference]: Start difference. First operand has 600 places, 2100 transitions, 63868 flow. Second operand 22 states and 238 transitions. [2025-04-13 20:17:27,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 2290 transitions, 71587 flow [2025-04-13 20:17:37,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 2290 transitions, 70921 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-04-13 20:17:37,230 INFO L231 Difference]: Finished difference. Result has 623 places, 2164 transitions, 66812 flow [2025-04-13 20:17:37,232 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=63190, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=701, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=66812, PETRI_PLACES=623, PETRI_TRANSITIONS=2164} [2025-04-13 20:17:37,232 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 596 predicate places. [2025-04-13 20:17:37,232 INFO L485 AbstractCegarLoop]: Abstraction has has 623 places, 2164 transitions, 66812 flow [2025-04-13 20:17:37,232 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:17:37,232 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:17:37,232 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:17:37,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2025-04-13 20:17:37,433 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2025-04-13 20:17:37,433 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:17:37,434 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:17:37,434 INFO L85 PathProgramCache]: Analyzing trace with hash 227588299, now seen corresponding path program 22 times [2025-04-13 20:17:37,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:17:37,434 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198077832] [2025-04-13 20:17:37,434 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:17:37,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:17:37,436 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:17:37,439 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:17:37,439 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:17:37,439 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:17:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:37,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:17:37,519 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198077832] [2025-04-13 20:17:37,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198077832] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:17:37,519 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191978254] [2025-04-13 20:17:37,519 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:17:37,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:17:37,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:17:37,521 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:17:37,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-04-13 20:17:37,546 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:17:37,557 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:17:37,558 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:17:37,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:17:37,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 20:17:37,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:17:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:37,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:17:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:37,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191978254] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 20:17:37,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-13 20:17:37,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 13 [2025-04-13 20:17:37,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691409350] [2025-04-13 20:17:37,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:17:37,730 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:17:37,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:17:37,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:17:37,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:17:37,731 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:17:37,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 623 places, 2164 transitions, 66812 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:17:37,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:17:37,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:17:37,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:17:44,597 INFO L116 PetriNetUnfolderBase]: 10187/15217 cut-off events. [2025-04-13 20:17:44,597 INFO L117 PetriNetUnfolderBase]: For 829593/829593 co-relation queries the response was YES. [2025-04-13 20:17:44,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199358 conditions, 15217 events. 10187/15217 cut-off events. For 829593/829593 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 97169 event pairs, 2328 based on Foata normal form. 28/15245 useless extension candidates. Maximal degree in co-relation 198856. Up to 13810 conditions per place. [2025-04-13 20:17:44,857 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1827 selfloop transitions, 372 changer transitions 0/2199 dead transitions. [2025-04-13 20:17:44,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 2199 transitions, 71636 flow [2025-04-13 20:17:44,857 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:17:44,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:17:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2025-04-13 20:17:44,858 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2025-04-13 20:17:44,858 INFO L175 Difference]: Start difference. First operand has 623 places, 2164 transitions, 66812 flow. Second operand 7 states and 79 transitions. [2025-04-13 20:17:44,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 2199 transitions, 71636 flow [2025-04-13 20:17:55,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 2199 transitions, 71196 flow, removed 176 selfloop flow, removed 7 redundant places. [2025-04-13 20:17:55,789 INFO L231 Difference]: Finished difference. Result has 622 places, 2163 transitions, 67081 flow [2025-04-13 20:17:55,791 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66286, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=67081, PETRI_PLACES=622, PETRI_TRANSITIONS=2163} [2025-04-13 20:17:55,791 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 595 predicate places. [2025-04-13 20:17:55,791 INFO L485 AbstractCegarLoop]: Abstraction has has 622 places, 2163 transitions, 67081 flow [2025-04-13 20:17:55,791 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:17:55,791 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:17:55,792 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:17:55,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-04-13 20:17:55,992 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2025-04-13 20:17:55,992 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:17:55,993 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:17:55,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1015058951, now seen corresponding path program 23 times [2025-04-13 20:17:55,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:17:55,993 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408433362] [2025-04-13 20:17:55,993 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:17:55,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:17:55,996 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:17:55,999 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:17:55,999 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:17:55,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:17:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:56,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:17:56,086 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408433362] [2025-04-13 20:17:56,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408433362] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:17:56,086 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129470619] [2025-04-13 20:17:56,086 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:17:56,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:17:56,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:17:56,088 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:17:56,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-04-13 20:17:56,114 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:17:56,131 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:17:56,131 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:17:56,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:17:56,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:17:56,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:17:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:56,192 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:17:56,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:17:56,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129470619] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:17:56,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:17:56,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-04-13 20:17:56,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92886974] [2025-04-13 20:17:56,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:17:56,305 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-13 20:17:56,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:17:56,305 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-13 20:17:56,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2025-04-13 20:17:56,305 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:17:56,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 2163 transitions, 67081 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:17:56,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:17:56,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:17:56,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:18:03,513 INFO L116 PetriNetUnfolderBase]: 10205/15236 cut-off events. [2025-04-13 20:18:03,514 INFO L117 PetriNetUnfolderBase]: For 839696/839696 co-relation queries the response was YES. [2025-04-13 20:18:03,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200532 conditions, 15236 events. 10205/15236 cut-off events. For 839696/839696 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 97588 event pairs, 1897 based on Foata normal form. 82/15318 useless extension candidates. Maximal degree in co-relation 200030. Up to 11276 conditions per place. [2025-04-13 20:18:03,770 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1514 selfloop transitions, 783 changer transitions 0/2297 dead transitions. [2025-04-13 20:18:03,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 2297 transitions, 73742 flow [2025-04-13 20:18:03,770 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-13 20:18:03,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-13 20:18:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 247 transitions. [2025-04-13 20:18:03,771 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.447463768115942 [2025-04-13 20:18:03,771 INFO L175 Difference]: Start difference. First operand has 622 places, 2163 transitions, 67081 flow. Second operand 23 states and 247 transitions. [2025-04-13 20:18:03,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 2297 transitions, 73742 flow [2025-04-13 20:18:14,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 640 places, 2297 transitions, 73326 flow, removed 13 selfloop flow, removed 2 redundant places. [2025-04-13 20:18:14,448 INFO L231 Difference]: Finished difference. Result has 643 places, 2173 transitions, 68866 flow [2025-04-13 20:18:14,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=66332, PETRI_DIFFERENCE_MINUEND_PLACES=618, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=68866, PETRI_PLACES=643, PETRI_TRANSITIONS=2173} [2025-04-13 20:18:14,450 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 616 predicate places. [2025-04-13 20:18:14,450 INFO L485 AbstractCegarLoop]: Abstraction has has 643 places, 2173 transitions, 68866 flow [2025-04-13 20:18:14,450 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:18:14,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:18:14,450 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:18:14,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2025-04-13 20:18:14,651 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2025-04-13 20:18:14,651 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:18:14,652 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:18:14,652 INFO L85 PathProgramCache]: Analyzing trace with hash 201572171, now seen corresponding path program 24 times [2025-04-13 20:18:14,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:18:14,652 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957353142] [2025-04-13 20:18:14,652 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:18:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:18:14,655 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:18:14,660 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:18:14,660 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:18:14,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:18:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:18:14,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:18:14,759 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957353142] [2025-04-13 20:18:14,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957353142] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:18:14,760 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545489781] [2025-04-13 20:18:14,760 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:18:14,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:18:14,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:18:14,761 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:18:14,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-04-13 20:18:14,787 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:18:14,802 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:18:14,803 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:18:14,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:18:14,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-13 20:18:14,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:18:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:18:14,904 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:18:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:18:15,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545489781] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:18:15,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:18:15,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-04-13 20:18:15,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018173977] [2025-04-13 20:18:15,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:18:15,033 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-13 20:18:15,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:18:15,034 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-13 20:18:15,034 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2025-04-13 20:18:15,034 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:18:15,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 643 places, 2173 transitions, 68866 flow. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:18:15,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:18:15,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:18:15,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:18:22,264 INFO L116 PetriNetUnfolderBase]: 10226/15246 cut-off events. [2025-04-13 20:18:22,264 INFO L117 PetriNetUnfolderBase]: For 861684/861684 co-relation queries the response was YES. [2025-04-13 20:18:22,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203633 conditions, 15246 events. 10226/15246 cut-off events. For 861684/861684 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 96976 event pairs, 1775 based on Foata normal form. 30/15276 useless extension candidates. Maximal degree in co-relation 203128. Up to 8355 conditions per place. [2025-04-13 20:18:22,506 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 1384 selfloop transitions, 899 changer transitions 0/2283 dead transitions. [2025-04-13 20:18:22,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 656 places, 2283 transitions, 75328 flow [2025-04-13 20:18:22,506 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-13 20:18:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-13 20:18:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 158 transitions. [2025-04-13 20:18:22,507 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2025-04-13 20:18:22,507 INFO L175 Difference]: Start difference. First operand has 643 places, 2173 transitions, 68866 flow. Second operand 14 states and 158 transitions. [2025-04-13 20:18:22,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 656 places, 2283 transitions, 75328 flow [2025-04-13 20:18:33,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 2283 transitions, 73831 flow, removed 45 selfloop flow, removed 15 redundant places. [2025-04-13 20:18:33,212 INFO L231 Difference]: Finished difference. Result has 646 places, 2192 transitions, 69747 flow [2025-04-13 20:18:33,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=67247, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=878, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=69747, PETRI_PLACES=646, PETRI_TRANSITIONS=2192} [2025-04-13 20:18:33,214 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 619 predicate places. [2025-04-13 20:18:33,214 INFO L485 AbstractCegarLoop]: Abstraction has has 646 places, 2192 transitions, 69747 flow [2025-04-13 20:18:33,214 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 19 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:18:33,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:18:33,214 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:18:33,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-04-13 20:18:33,414 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:18:33,414 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:18:33,415 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:18:33,415 INFO L85 PathProgramCache]: Analyzing trace with hash 27395922, now seen corresponding path program 19 times [2025-04-13 20:18:33,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:18:33,415 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469315011] [2025-04-13 20:18:33,415 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:18:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:18:33,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:18:33,419 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:18:33,419 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:18:33,419 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:18:33,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:18:33,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:18:33,475 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469315011] [2025-04-13 20:18:33,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469315011] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:18:33,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:18:33,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 20:18:33,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049408087] [2025-04-13 20:18:33,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:18:33,475 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:18:33,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:18:33,476 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:18:33,476 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:18:33,476 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:18:33,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 2192 transitions, 69747 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:18:33,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:18:33,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:18:33,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:18:40,631 INFO L116 PetriNetUnfolderBase]: 10225/15247 cut-off events. [2025-04-13 20:18:40,631 INFO L117 PetriNetUnfolderBase]: For 893371/893371 co-relation queries the response was YES. [2025-04-13 20:18:40,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204323 conditions, 15247 events. 10225/15247 cut-off events. For 893371/893371 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 97155 event pairs, 2345 based on Foata normal form. 2/15249 useless extension candidates. Maximal degree in co-relation 203809. Up to 13835 conditions per place. [2025-04-13 20:18:40,903 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1829 selfloop transitions, 392 changer transitions 2/2223 dead transitions. [2025-04-13 20:18:40,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 2223 transitions, 74632 flow [2025-04-13 20:18:40,903 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:18:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:18:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2025-04-13 20:18:40,905 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2025-04-13 20:18:40,905 INFO L175 Difference]: Start difference. First operand has 646 places, 2192 transitions, 69747 flow. Second operand 7 states and 75 transitions. [2025-04-13 20:18:40,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 2223 transitions, 74632 flow [2025-04-13 20:18:51,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 2223 transitions, 73174 flow, removed 130 selfloop flow, removed 3 redundant places. [2025-04-13 20:18:51,627 INFO L231 Difference]: Finished difference. Result has 650 places, 2193 transitions, 69110 flow [2025-04-13 20:18:51,629 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68289, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=391, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1800, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=69110, PETRI_PLACES=650, PETRI_TRANSITIONS=2193} [2025-04-13 20:18:51,629 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 623 predicate places. [2025-04-13 20:18:51,629 INFO L485 AbstractCegarLoop]: Abstraction has has 650 places, 2193 transitions, 69110 flow [2025-04-13 20:18:51,629 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:18:51,629 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:18:51,630 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:18:51,630 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2025-04-13 20:18:51,630 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:18:51,630 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:18:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash -49819257, now seen corresponding path program 25 times [2025-04-13 20:18:51,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:18:51,630 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002622214] [2025-04-13 20:18:51,630 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:18:51,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:18:51,633 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:18:51,637 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:18:51,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:18:51,637 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:18:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:18:51,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:18:51,704 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002622214] [2025-04-13 20:18:51,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002622214] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:18:51,704 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514774564] [2025-04-13 20:18:51,704 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:18:51,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:18:51,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:18:51,706 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:18:51,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-04-13 20:18:51,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:18:51,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:18:51,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:18:51,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:18:51,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 20:18:51,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:18:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:18:51,801 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:18:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:18:51,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514774564] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:18:51,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:18:51,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 20:18:51,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688395766] [2025-04-13 20:18:51,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:18:51,884 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 20:18:51,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:18:51,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 20:18:51,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:18:51,884 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:18:51,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 2193 transitions, 69110 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:18:51,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:18:51,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:18:51,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:18:59,539 INFO L116 PetriNetUnfolderBase]: 10210/15201 cut-off events. [2025-04-13 20:18:59,539 INFO L117 PetriNetUnfolderBase]: For 865431/865431 co-relation queries the response was YES. [2025-04-13 20:18:59,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203542 conditions, 15201 events. 10210/15201 cut-off events. For 865431/865431 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 96487 event pairs, 2334 based on Foata normal form. 22/15223 useless extension candidates. Maximal degree in co-relation 203026. Up to 13786 conditions per place. [2025-04-13 20:18:59,778 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1833 selfloop transitions, 396 changer transitions 0/2229 dead transitions. [2025-04-13 20:18:59,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 2229 transitions, 74110 flow [2025-04-13 20:18:59,779 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:18:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:18:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 81 transitions. [2025-04-13 20:18:59,780 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2025-04-13 20:18:59,780 INFO L175 Difference]: Start difference. First operand has 650 places, 2193 transitions, 69110 flow. Second operand 7 states and 81 transitions. [2025-04-13 20:18:59,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 2229 transitions, 74110 flow [2025-04-13 20:19:10,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 652 places, 2229 transitions, 73648 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-04-13 20:19:10,095 INFO L231 Difference]: Finished difference. Result has 652 places, 2192 transitions, 69435 flow [2025-04-13 20:19:10,096 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68590, PETRI_DIFFERENCE_MINUEND_PLACES=646, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1796, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=69435, PETRI_PLACES=652, PETRI_TRANSITIONS=2192} [2025-04-13 20:19:10,096 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 625 predicate places. [2025-04-13 20:19:10,096 INFO L485 AbstractCegarLoop]: Abstraction has has 652 places, 2192 transitions, 69435 flow [2025-04-13 20:19:10,096 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:19:10,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:19:10,096 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:19:10,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2025-04-13 20:19:10,297 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2025-04-13 20:19:10,297 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:19:10,298 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:19:10,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1439585739, now seen corresponding path program 26 times [2025-04-13 20:19:10,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:19:10,298 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589338102] [2025-04-13 20:19:10,298 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:19:10,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:19:10,301 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:19:10,308 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:19:10,308 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:19:10,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:19:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:19:10,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:19:10,391 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589338102] [2025-04-13 20:19:10,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589338102] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:19:10,391 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118369759] [2025-04-13 20:19:10,391 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:19:10,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:19:10,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:19:10,393 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:19:10,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-04-13 20:19:10,420 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:19:10,441 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:19:10,441 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:19:10,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:19:10,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:19:10,442 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:19:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:19:10,486 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:19:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:19:10,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118369759] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:19:10,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:19:10,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2025-04-13 20:19:10,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194978510] [2025-04-13 20:19:10,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:19:10,615 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 20:19:10,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:19:10,615 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 20:19:10,616 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2025-04-13 20:19:10,616 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:19:10,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 652 places, 2192 transitions, 69435 flow. Second operand has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:19:10,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:19:10,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:19:10,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:19:18,380 INFO L116 PetriNetUnfolderBase]: 10383/15516 cut-off events. [2025-04-13 20:19:18,380 INFO L117 PetriNetUnfolderBase]: For 893575/893575 co-relation queries the response was YES. [2025-04-13 20:19:18,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208365 conditions, 15516 events. 10383/15516 cut-off events. For 893575/893575 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 100033 event pairs, 2023 based on Foata normal form. 29/15545 useless extension candidates. Maximal degree in co-relation 207849. Up to 11780 conditions per place. [2025-04-13 20:19:18,678 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1611 selfloop transitions, 793 changer transitions 1/2405 dead transitions. [2025-04-13 20:19:18,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 673 places, 2405 transitions, 79164 flow [2025-04-13 20:19:18,679 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 20:19:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 20:19:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 226 transitions. [2025-04-13 20:19:18,679 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42803030303030304 [2025-04-13 20:19:18,679 INFO L175 Difference]: Start difference. First operand has 652 places, 2192 transitions, 69435 flow. Second operand 22 states and 226 transitions. [2025-04-13 20:19:18,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 673 places, 2405 transitions, 79164 flow [2025-04-13 20:19:29,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 669 places, 2405 transitions, 78669 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-13 20:19:29,945 INFO L231 Difference]: Finished difference. Result has 680 places, 2278 transitions, 74270 flow [2025-04-13 20:19:29,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68967, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=715, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=74270, PETRI_PLACES=680, PETRI_TRANSITIONS=2278} [2025-04-13 20:19:29,947 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 653 predicate places. [2025-04-13 20:19:29,947 INFO L485 AbstractCegarLoop]: Abstraction has has 680 places, 2278 transitions, 74270 flow [2025-04-13 20:19:29,947 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.8125) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:19:29,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:19:29,947 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:19:29,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2025-04-13 20:19:30,147 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:19:30,147 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:19:30,148 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:19:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1100202597, now seen corresponding path program 27 times [2025-04-13 20:19:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:19:30,148 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181154270] [2025-04-13 20:19:30,148 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:19:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:19:30,150 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:19:30,153 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:19:30,153 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:19:30,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:19:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:19:30,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:19:30,216 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181154270] [2025-04-13 20:19:30,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181154270] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:19:30,216 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561085915] [2025-04-13 20:19:30,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:19:30,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:19:30,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:19:30,218 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:19:30,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-04-13 20:19:30,243 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:19:30,259 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:19:30,259 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:19:30,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:19:30,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:19:30,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:19:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:19:30,279 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:19:30,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561085915] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:19:30,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:19:30,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-04-13 20:19:30,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149755658] [2025-04-13 20:19:30,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:19:30,279 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:19:30,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:19:30,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:19:30,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:19:30,280 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:19:30,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 2278 transitions, 74270 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:19:30,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:19:30,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:19:30,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:19:38,032 INFO L116 PetriNetUnfolderBase]: 10381/15514 cut-off events. [2025-04-13 20:19:38,032 INFO L117 PetriNetUnfolderBase]: For 938189/938189 co-relation queries the response was YES. [2025-04-13 20:19:38,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212785 conditions, 15514 events. 10381/15514 cut-off events. For 938189/938189 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 99715 event pairs, 2359 based on Foata normal form. 3/15517 useless extension candidates. Maximal degree in co-relation 212258. Up to 14028 conditions per place. [2025-04-13 20:19:38,287 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1887 selfloop transitions, 419 changer transitions 3/2309 dead transitions. [2025-04-13 20:19:38,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 2309 transitions, 79298 flow [2025-04-13 20:19:38,287 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:19:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:19:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2025-04-13 20:19:38,288 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-04-13 20:19:38,288 INFO L175 Difference]: Start difference. First operand has 680 places, 2278 transitions, 74270 flow. Second operand 7 states and 77 transitions. [2025-04-13 20:19:38,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 2309 transitions, 79298 flow [2025-04-13 20:19:50,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 2309 transitions, 78251 flow, removed 244 selfloop flow, removed 3 redundant places. [2025-04-13 20:19:50,904 INFO L231 Difference]: Finished difference. Result has 684 places, 2277 transitions, 74051 flow [2025-04-13 20:19:50,906 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=73227, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1859, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=74051, PETRI_PLACES=684, PETRI_TRANSITIONS=2277} [2025-04-13 20:19:50,906 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 657 predicate places. [2025-04-13 20:19:50,906 INFO L485 AbstractCegarLoop]: Abstraction has has 684 places, 2277 transitions, 74051 flow [2025-04-13 20:19:50,906 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:19:50,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:19:50,906 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:19:50,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2025-04-13 20:19:51,107 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2025-04-13 20:19:51,107 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:19:51,108 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:19:51,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1712379637, now seen corresponding path program 28 times [2025-04-13 20:19:51,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:19:51,108 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614162826] [2025-04-13 20:19:51,109 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:19:51,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:19:51,112 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:19:51,118 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:19:51,119 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:19:51,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:19:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:19:51,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:19:51,214 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614162826] [2025-04-13 20:19:51,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614162826] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:19:51,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:19:51,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 20:19:51,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092637440] [2025-04-13 20:19:51,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:19:51,214 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:19:51,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:19:51,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:19:51,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:19:51,215 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:19:51,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 2277 transitions, 74051 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:19:51,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:19:51,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:19:51,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:19:59,080 INFO L116 PetriNetUnfolderBase]: 10381/15540 cut-off events. [2025-04-13 20:19:59,080 INFO L117 PetriNetUnfolderBase]: For 932905/932905 co-relation queries the response was YES. [2025-04-13 20:19:59,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213050 conditions, 15540 events. 10381/15540 cut-off events. For 932905/932905 co-relation queries the response was YES. Maximal size of possible extension queue 1141. Compared 100299 event pairs, 2288 based on Foata normal form. 9/15549 useless extension candidates. Maximal degree in co-relation 212698. Up to 13557 conditions per place. [2025-04-13 20:19:59,390 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1839 selfloop transitions, 483 changer transitions 3/2325 dead transitions. [2025-04-13 20:19:59,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 2325 transitions, 79388 flow [2025-04-13 20:19:59,390 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:19:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:19:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2025-04-13 20:19:59,391 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2025-04-13 20:19:59,391 INFO L175 Difference]: Start difference. First operand has 684 places, 2277 transitions, 74051 flow. Second operand 7 states and 83 transitions. [2025-04-13 20:19:59,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 2325 transitions, 79388 flow [2025-04-13 20:20:12,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 2325 transitions, 78542 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-04-13 20:20:12,228 INFO L231 Difference]: Finished difference. Result has 684 places, 2277 transitions, 74205 flow [2025-04-13 20:20:12,230 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=73205, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1794, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=74205, PETRI_PLACES=684, PETRI_TRANSITIONS=2277} [2025-04-13 20:20:12,230 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 657 predicate places. [2025-04-13 20:20:12,230 INFO L485 AbstractCegarLoop]: Abstraction has has 684 places, 2277 transitions, 74205 flow [2025-04-13 20:20:12,230 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:20:12,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:20:12,230 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:20:12,230 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2025-04-13 20:20:12,230 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:20:12,231 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:20:12,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1409005962, now seen corresponding path program 20 times [2025-04-13 20:20:12,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:20:12,231 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756010006] [2025-04-13 20:20:12,231 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:20:12,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:20:12,234 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:20:12,237 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:20:12,237 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:20:12,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:20:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:20:12,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:20:12,308 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756010006] [2025-04-13 20:20:12,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756010006] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:20:12,308 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972673761] [2025-04-13 20:20:12,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:20:12,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:20:12,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:20:12,310 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:20:12,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-04-13 20:20:12,336 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:20:12,348 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:20:12,348 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:20:12,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:20:12,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:20:12,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:20:12,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:20:12,394 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:20:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:20:12,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972673761] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:20:12,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:20:12,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2025-04-13 20:20:12,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380138056] [2025-04-13 20:20:12,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:20:12,477 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 20:20:12,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:20:12,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 20:20:12,478 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:20:12,478 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:20:12,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 2277 transitions, 74205 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:20:12,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:20:12,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:20:12,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:20:21,752 INFO L116 PetriNetUnfolderBase]: 12117/17872 cut-off events. [2025-04-13 20:20:21,753 INFO L117 PetriNetUnfolderBase]: For 1093489/1093489 co-relation queries the response was YES. [2025-04-13 20:20:21,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244791 conditions, 17872 events. 12117/17872 cut-off events. For 1093489/1093489 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 114782 event pairs, 1707 based on Foata normal form. 53/17925 useless extension candidates. Maximal degree in co-relation 244262. Up to 12515 conditions per place. [2025-04-13 20:20:22,068 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1478 selfloop transitions, 1409 changer transitions 0/2887 dead transitions. [2025-04-13 20:20:22,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 2887 transitions, 95848 flow [2025-04-13 20:20:22,069 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-13 20:20:22,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-13 20:20:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 174 transitions. [2025-04-13 20:20:22,069 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.453125 [2025-04-13 20:20:22,069 INFO L175 Difference]: Start difference. First operand has 684 places, 2277 transitions, 74205 flow. Second operand 16 states and 174 transitions. [2025-04-13 20:20:22,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 2887 transitions, 95848 flow [2025-04-13 20:20:36,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2887 transitions, 94874 flow, removed 5 selfloop flow, removed 6 redundant places. [2025-04-13 20:20:36,525 INFO L231 Difference]: Finished difference. Result has 701 places, 2663 transitions, 88735 flow [2025-04-13 20:20:36,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=73158, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=88735, PETRI_PLACES=701, PETRI_TRANSITIONS=2663} [2025-04-13 20:20:36,527 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 674 predicate places. [2025-04-13 20:20:36,527 INFO L485 AbstractCegarLoop]: Abstraction has has 701 places, 2663 transitions, 88735 flow [2025-04-13 20:20:36,527 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:20:36,527 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:20:36,527 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:20:36,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2025-04-13 20:20:36,727 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:20:36,728 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:20:36,728 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:20:36,728 INFO L85 PathProgramCache]: Analyzing trace with hash -993656204, now seen corresponding path program 21 times [2025-04-13 20:20:36,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:20:36,728 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919886552] [2025-04-13 20:20:36,728 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:20:36,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:20:36,731 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:20:36,735 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:20:36,735 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:20:36,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:20:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:20:36,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:20:36,823 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919886552] [2025-04-13 20:20:36,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919886552] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:20:36,823 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435618122] [2025-04-13 20:20:36,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:20:36,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:20:36,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:20:36,825 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:20:36,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-04-13 20:20:36,852 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:20:36,873 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:20:36,874 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:20:36,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:20:36,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:20:36,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:20:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:20:36,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:20:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:20:37,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435618122] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:20:37,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:20:37,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2025-04-13 20:20:37,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774469170] [2025-04-13 20:20:37,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:20:37,011 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-13 20:20:37,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:20:37,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-13 20:20:37,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-04-13 20:20:37,012 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:20:37,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 701 places, 2663 transitions, 88735 flow. Second operand has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:20:37,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:20:37,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:20:37,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:20:48,223 INFO L116 PetriNetUnfolderBase]: 12237/18124 cut-off events. [2025-04-13 20:20:48,224 INFO L117 PetriNetUnfolderBase]: For 1160903/1160903 co-relation queries the response was YES. [2025-04-13 20:20:48,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257150 conditions, 18124 events. 12237/18124 cut-off events. For 1160903/1160903 co-relation queries the response was YES. Maximal size of possible extension queue 1311. Compared 117647 event pairs, 1732 based on Foata normal form. 14/18138 useless extension candidates. Maximal degree in co-relation 256592. Up to 12707 conditions per place. [2025-04-13 20:20:48,600 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1527 selfloop transitions, 1429 changer transitions 0/2956 dead transitions. [2025-04-13 20:20:48,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 722 places, 2956 transitions, 101056 flow [2025-04-13 20:20:48,601 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-13 20:20:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-13 20:20:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 232 transitions. [2025-04-13 20:20:48,601 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2025-04-13 20:20:48,601 INFO L175 Difference]: Start difference. First operand has 701 places, 2663 transitions, 88735 flow. Second operand 22 states and 232 transitions. [2025-04-13 20:20:48,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 722 places, 2956 transitions, 101056 flow [2025-04-13 20:21:05,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 717 places, 2956 transitions, 99293 flow, removed 448 selfloop flow, removed 5 redundant places. [2025-04-13 20:21:05,093 INFO L231 Difference]: Finished difference. Result has 723 places, 2729 transitions, 91967 flow [2025-04-13 20:21:05,095 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=87098, PETRI_DIFFERENCE_MINUEND_PLACES=696, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=91967, PETRI_PLACES=723, PETRI_TRANSITIONS=2729} [2025-04-13 20:21:05,095 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 696 predicate places. [2025-04-13 20:21:05,096 INFO L485 AbstractCegarLoop]: Abstraction has has 723 places, 2729 transitions, 91967 flow [2025-04-13 20:21:05,096 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.142857142857143) internal successors, (72), 14 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:21:05,096 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:21:05,096 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:21:05,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-04-13 20:21:05,300 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:21:05,300 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:21:05,300 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:21:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash -876079183, now seen corresponding path program 29 times [2025-04-13 20:21:05,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:21:05,301 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38688680] [2025-04-13 20:21:05,301 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:21:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:21:05,305 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:21:05,309 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:21:05,309 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:21:05,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:21:05,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:21:05,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:21:05,377 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38688680] [2025-04-13 20:21:05,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38688680] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:21:05,378 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384354334] [2025-04-13 20:21:05,378 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:21:05,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:21:05,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:21:05,380 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:21:05,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-04-13 20:21:05,405 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:21:05,425 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:21:05,425 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:21:05,425 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:21:05,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:21:05,426 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:21:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:21:05,451 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:21:05,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384354334] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:21:05,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:21:05,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 9 [2025-04-13 20:21:05,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920530544] [2025-04-13 20:21:05,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:21:05,451 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:21:05,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:21:05,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:21:05,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-04-13 20:21:05,451 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:21:05,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 2729 transitions, 91967 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:21:05,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:21:05,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:21:05,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:21:16,423 INFO L116 PetriNetUnfolderBase]: 12235/18131 cut-off events. [2025-04-13 20:21:16,423 INFO L117 PetriNetUnfolderBase]: For 1177577/1177577 co-relation queries the response was YES. [2025-04-13 20:21:16,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260000 conditions, 18131 events. 12235/18131 cut-off events. For 1177577/1177577 co-relation queries the response was YES. Maximal size of possible extension queue 1314. Compared 117650 event pairs, 2569 based on Foata normal form. 3/18134 useless extension candidates. Maximal degree in co-relation 259426. Up to 16145 conditions per place. [2025-04-13 20:21:16,757 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 2292 selfloop transitions, 478 changer transitions 4/2774 dead transitions. [2025-04-13 20:21:16,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 2774 transitions, 98133 flow [2025-04-13 20:21:16,758 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:21:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:21:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 80 transitions. [2025-04-13 20:21:16,758 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2025-04-13 20:21:16,758 INFO L175 Difference]: Start difference. First operand has 723 places, 2729 transitions, 91967 flow. Second operand 7 states and 80 transitions. [2025-04-13 20:21:16,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 2774 transitions, 98133 flow [2025-04-13 20:21:32,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 2774 transitions, 96149 flow, removed 373 selfloop flow, removed 7 redundant places. [2025-04-13 20:21:32,595 INFO L231 Difference]: Finished difference. Result has 723 places, 2727 transitions, 90869 flow [2025-04-13 20:21:32,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=89983, PETRI_DIFFERENCE_MINUEND_PLACES=716, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2729, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=90869, PETRI_PLACES=723, PETRI_TRANSITIONS=2727} [2025-04-13 20:21:32,597 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 696 predicate places. [2025-04-13 20:21:32,597 INFO L485 AbstractCegarLoop]: Abstraction has has 723 places, 2727 transitions, 90869 flow [2025-04-13 20:21:32,597 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:21:32,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:21:32,597 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:21:32,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2025-04-13 20:21:32,797 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2025-04-13 20:21:32,798 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:21:32,798 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:21:32,798 INFO L85 PathProgramCache]: Analyzing trace with hash -622727324, now seen corresponding path program 22 times [2025-04-13 20:21:32,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:21:32,798 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62866853] [2025-04-13 20:21:32,798 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:21:32,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:21:32,801 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:21:32,804 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:21:32,804 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:21:32,804 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:21:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:21:32,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:21:32,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62866853] [2025-04-13 20:21:32,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62866853] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:21:32,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627099022] [2025-04-13 20:21:32,867 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:21:32,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:21:32,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:21:32,869 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:21:32,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-04-13 20:21:32,896 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:21:32,928 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:21:32,928 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:21:32,928 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:21:32,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 20:21:32,929 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:21:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:21:33,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:21:33,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:21:33,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627099022] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:21:33,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:21:33,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2025-04-13 20:21:33,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382619043] [2025-04-13 20:21:33,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:21:33,219 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 20:21:33,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:21:33,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 20:21:33,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2025-04-13 20:21:33,219 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:21:33,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 2727 transitions, 90869 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:21:33,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:21:33,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:21:33,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:21:44,552 INFO L116 PetriNetUnfolderBase]: 12194/18027 cut-off events. [2025-04-13 20:21:44,552 INFO L117 PetriNetUnfolderBase]: For 1128932/1128932 co-relation queries the response was YES. [2025-04-13 20:21:44,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257543 conditions, 18027 events. 12194/18027 cut-off events. For 1128932/1128932 co-relation queries the response was YES. Maximal size of possible extension queue 1306. Compared 116565 event pairs, 1761 based on Foata normal form. 78/18105 useless extension candidates. Maximal degree in co-relation 257118. Up to 12694 conditions per place. [2025-04-13 20:21:44,898 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1512 selfloop transitions, 1446 changer transitions 0/2958 dead transitions. [2025-04-13 20:21:44,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 743 places, 2958 transitions, 101511 flow [2025-04-13 20:21:44,899 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-13 20:21:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-13 20:21:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 235 transitions. [2025-04-13 20:21:44,899 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4257246376811594 [2025-04-13 20:21:44,900 INFO L175 Difference]: Start difference. First operand has 723 places, 2727 transitions, 90869 flow. Second operand 23 states and 235 transitions. [2025-04-13 20:21:44,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 743 places, 2958 transitions, 101511 flow [2025-04-13 20:22:00,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 737 places, 2958 transitions, 100537 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-04-13 20:22:00,768 INFO L231 Difference]: Finished difference. Result has 737 places, 2727 transitions, 92933 flow [2025-04-13 20:22:00,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=89733, PETRI_DIFFERENCE_MINUEND_PLACES=715, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=92933, PETRI_PLACES=737, PETRI_TRANSITIONS=2727} [2025-04-13 20:22:00,769 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 710 predicate places. [2025-04-13 20:22:00,770 INFO L485 AbstractCegarLoop]: Abstraction has has 737 places, 2727 transitions, 92933 flow [2025-04-13 20:22:00,770 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:00,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:00,770 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:00,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-04-13 20:22:00,970 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2025-04-13 20:22:00,970 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:22:00,971 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:00,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1153913210, now seen corresponding path program 6 times [2025-04-13 20:22:00,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:00,971 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613003175] [2025-04-13 20:22:00,971 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:00,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:00,974 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:00,977 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:00,977 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:22:00,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:01,101 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613003175] [2025-04-13 20:22:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613003175] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:01,101 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46843929] [2025-04-13 20:22:01,101 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:22:01,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:01,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:01,104 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:22:01,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-04-13 20:22:01,130 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:01,145 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:01,145 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:22:01,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:01,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-13 20:22:01,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:01,280 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:01,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46843929] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:01,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:01,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-04-13 20:22:01,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766827787] [2025-04-13 20:22:01,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:01,367 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-13 20:22:01,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:01,367 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-13 20:22:01,367 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2025-04-13 20:22:01,367 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:22:01,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 2727 transitions, 92933 flow. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:01,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:01,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:22:01,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:13,634 INFO L116 PetriNetUnfolderBase]: 14161/20761 cut-off events. [2025-04-13 20:22:13,634 INFO L117 PetriNetUnfolderBase]: For 1321123/1321123 co-relation queries the response was YES. [2025-04-13 20:22:13,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299697 conditions, 20761 events. 14161/20761 cut-off events. For 1321123/1321123 co-relation queries the response was YES. Maximal size of possible extension queue 1482. Compared 134377 event pairs, 735 based on Foata normal form. 9/20770 useless extension candidates. Maximal degree in co-relation 299112. Up to 9957 conditions per place. [2025-04-13 20:22:14,034 INFO L140 encePairwiseOnDemand]: 14/24 looper letters, 2291 selfloop transitions, 887 changer transitions 1/3179 dead transitions. [2025-04-13 20:22:14,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 756 places, 3179 transitions, 111799 flow [2025-04-13 20:22:14,035 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-13 20:22:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-13 20:22:14,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 225 transitions. [2025-04-13 20:22:14,036 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.46875 [2025-04-13 20:22:14,036 INFO L175 Difference]: Start difference. First operand has 737 places, 2727 transitions, 92933 flow. Second operand 20 states and 225 transitions. [2025-04-13 20:22:14,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 756 places, 3179 transitions, 111799 flow [2025-04-13 20:22:33,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 744 places, 3179 transitions, 109516 flow, removed 41 selfloop flow, removed 12 redundant places. [2025-04-13 20:22:33,717 INFO L231 Difference]: Finished difference. Result has 754 places, 2850 transitions, 98314 flow [2025-04-13 20:22:33,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=90904, PETRI_DIFFERENCE_MINUEND_PLACES=725, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=765, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1908, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=98314, PETRI_PLACES=754, PETRI_TRANSITIONS=2850} [2025-04-13 20:22:33,719 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 727 predicate places. [2025-04-13 20:22:33,719 INFO L485 AbstractCegarLoop]: Abstraction has has 754 places, 2850 transitions, 98314 flow [2025-04-13 20:22:33,719 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 19 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:33,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:22:33,719 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:22:33,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-04-13 20:22:33,920 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2025-04-13 20:22:33,920 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:22:33,920 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:22:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1137340802, now seen corresponding path program 23 times [2025-04-13 20:22:33,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:22:33,921 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551953270] [2025-04-13 20:22:33,921 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:33,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:22:33,923 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:33,926 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:33,926 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:33,926 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:34,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:22:34,004 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551953270] [2025-04-13 20:22:34,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551953270] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:22:34,004 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803231154] [2025-04-13 20:22:34,004 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:22:34,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:22:34,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:22:34,005 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:22:34,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-04-13 20:22:34,030 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:22:34,052 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:22:34,052 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:22:34,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:22:34,052 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 20:22:34,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:22:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:34,082 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:22:34,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:22:34,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803231154] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:22:34,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:22:34,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 13 [2025-04-13 20:22:34,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364774044] [2025-04-13 20:22:34,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:22:34,168 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 20:22:34,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:22:34,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 20:22:34,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:22:34,169 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:22:34,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 2850 transitions, 98314 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:22:34,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:22:34,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:22:34,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:22:47,614 INFO L116 PetriNetUnfolderBase]: 14143/20743 cut-off events. [2025-04-13 20:22:47,614 INFO L117 PetriNetUnfolderBase]: For 1425992/1425992 co-relation queries the response was YES. [2025-04-13 20:22:47,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301825 conditions, 20743 events. 14143/20743 cut-off events. For 1425992/1425992 co-relation queries the response was YES. Maximal size of possible extension queue 1482. Compared 135100 event pairs, 2352 based on Foata normal form. 18/20761 useless extension candidates. Maximal degree in co-relation 301242. Up to 16414 conditions per place. [2025-04-13 20:22:48,040 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1806 selfloop transitions, 1164 changer transitions 0/2970 dead transitions. [2025-04-13 20:22:48,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 2970 transitions, 106731 flow [2025-04-13 20:22:48,040 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 20:22:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 20:22:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2025-04-13 20:22:48,041 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2025-04-13 20:22:48,041 INFO L175 Difference]: Start difference. First operand has 754 places, 2850 transitions, 98314 flow. Second operand 12 states and 133 transitions. [2025-04-13 20:22:48,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 2970 transitions, 106731 flow [2025-04-13 20:23:08,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 761 places, 2970 transitions, 105618 flow, removed 146 selfloop flow, removed 4 redundant places. [2025-04-13 20:23:08,768 INFO L231 Difference]: Finished difference. Result has 767 places, 2869 transitions, 101097 flow [2025-04-13 20:23:08,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=97239, PETRI_DIFFERENCE_MINUEND_PLACES=750, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1689, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=101097, PETRI_PLACES=767, PETRI_TRANSITIONS=2869} [2025-04-13 20:23:08,770 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 740 predicate places. [2025-04-13 20:23:08,770 INFO L485 AbstractCegarLoop]: Abstraction has has 767 places, 2869 transitions, 101097 flow [2025-04-13 20:23:08,770 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:23:08,770 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:08,770 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:08,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2025-04-13 20:23:08,971 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2025-04-13 20:23:08,971 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:23:08,972 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:08,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2088255724, now seen corresponding path program 24 times [2025-04-13 20:23:08,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:08,972 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841845315] [2025-04-13 20:23:08,972 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:23:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:08,975 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:23:08,978 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:23:08,978 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:23:08,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:09,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:09,042 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841845315] [2025-04-13 20:23:09,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841845315] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:23:09,042 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66150992] [2025-04-13 20:23:09,042 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:23:09,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:23:09,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:23:09,044 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:23:09,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-04-13 20:23:09,071 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:23:09,093 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:23:09,093 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:23:09,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:09,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:23:09,094 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:23:09,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:09,110 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 20:23:09,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66150992] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:23:09,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 20:23:09,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 8 [2025-04-13 20:23:09,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058443272] [2025-04-13 20:23:09,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:23:09,110 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:23:09,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:09,111 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:23:09,111 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2025-04-13 20:23:09,111 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:23:09,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 767 places, 2869 transitions, 101097 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:23:09,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:09,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:23:09,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:22,161 INFO L116 PetriNetUnfolderBase]: 14141/20741 cut-off events. [2025-04-13 20:23:22,161 INFO L117 PetriNetUnfolderBase]: For 1426922/1426922 co-relation queries the response was YES. [2025-04-13 20:23:22,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304727 conditions, 20741 events. 14141/20741 cut-off events. For 1426922/1426922 co-relation queries the response was YES. Maximal size of possible extension queue 1482. Compared 134598 event pairs, 3077 based on Foata normal form. 2/20743 useless extension candidates. Maximal degree in co-relation 304119. Up to 19044 conditions per place. [2025-04-13 20:23:22,744 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 2432 selfloop transitions, 463 changer transitions 2/2897 dead transitions. [2025-04-13 20:23:22,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 2897 transitions, 107242 flow [2025-04-13 20:23:22,744 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:23:22,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:23:22,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 75 transitions. [2025-04-13 20:23:22,745 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2025-04-13 20:23:22,745 INFO L175 Difference]: Start difference. First operand has 767 places, 2869 transitions, 101097 flow. Second operand 7 states and 75 transitions. [2025-04-13 20:23:22,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 2897 transitions, 107242 flow [2025-04-13 20:23:46,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 2897 transitions, 105537 flow, removed 105 selfloop flow, removed 5 redundant places. [2025-04-13 20:23:46,299 INFO L231 Difference]: Finished difference. Result has 768 places, 2867 transitions, 100236 flow [2025-04-13 20:23:46,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=99331, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2868, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=463, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=100236, PETRI_PLACES=768, PETRI_TRANSITIONS=2867} [2025-04-13 20:23:46,301 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 741 predicate places. [2025-04-13 20:23:46,301 INFO L485 AbstractCegarLoop]: Abstraction has has 768 places, 2867 transitions, 100236 flow [2025-04-13 20:23:46,301 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:23:46,301 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:23:46,301 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:23:46,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2025-04-13 20:23:46,501 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2025-04-13 20:23:46,501 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:23:46,502 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:23:46,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2118774838, now seen corresponding path program 25 times [2025-04-13 20:23:46,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:23:46,502 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202230965] [2025-04-13 20:23:46,502 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-13 20:23:46,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:23:46,504 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 20:23:46,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:23:46,506 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:23:46,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:23:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:23:46,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:23:46,572 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202230965] [2025-04-13 20:23:46,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202230965] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:23:46,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:23:46,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-13 20:23:46,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326677350] [2025-04-13 20:23:46,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:23:46,572 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 20:23:46,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:23:46,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 20:23:46,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-04-13 20:23:46,573 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:23:46,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 2867 transitions, 100236 flow. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:23:46,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:23:46,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:23:46,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:23:59,329 INFO L116 PetriNetUnfolderBase]: 14138/20736 cut-off events. [2025-04-13 20:23:59,330 INFO L117 PetriNetUnfolderBase]: For 1419223/1419223 co-relation queries the response was YES. [2025-04-13 20:24:00,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302207 conditions, 20736 events. 14138/20736 cut-off events. For 1419223/1419223 co-relation queries the response was YES. Maximal size of possible extension queue 1482. Compared 134513 event pairs, 3075 based on Foata normal form. 2/20738 useless extension candidates. Maximal degree in co-relation 301610. Up to 19042 conditions per place. [2025-04-13 20:24:00,184 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 2439 selfloop transitions, 461 changer transitions 2/2902 dead transitions. [2025-04-13 20:24:00,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 2902 transitions, 106573 flow [2025-04-13 20:24:00,184 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-13 20:24:00,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-13 20:24:00,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2025-04-13 20:24:00,185 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2025-04-13 20:24:00,185 INFO L175 Difference]: Start difference. First operand has 768 places, 2867 transitions, 100236 flow. Second operand 7 states and 74 transitions. [2025-04-13 20:24:00,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 2902 transitions, 106573 flow [2025-04-13 20:24:22,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 768 places, 2902 transitions, 105645 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-04-13 20:24:22,396 INFO L231 Difference]: Finished difference. Result has 769 places, 2867 transitions, 100208 flow [2025-04-13 20:24:22,397 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=99248, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=460, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=100208, PETRI_PLACES=769, PETRI_TRANSITIONS=2867} [2025-04-13 20:24:22,398 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 742 predicate places. [2025-04-13 20:24:22,398 INFO L485 AbstractCegarLoop]: Abstraction has has 769 places, 2867 transitions, 100208 flow [2025-04-13 20:24:22,398 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:24:22,398 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:22,398 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:22,398 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2025-04-13 20:24:22,398 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:24:22,399 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1250866591, now seen corresponding path program 30 times [2025-04-13 20:24:22,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:22,399 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536394979] [2025-04-13 20:24:22,399 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:24:22,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:22,402 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:24:22,404 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:24:22,405 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:24:22,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:24:22,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:22,480 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536394979] [2025-04-13 20:24:22,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536394979] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:22,480 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696379522] [2025-04-13 20:24:22,480 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:24:22,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:22,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:22,482 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:22,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2025-04-13 20:24:22,507 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:24:22,522 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:24:22,522 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-13 20:24:22,522 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:22,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:24:22,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:24:22,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:24:22,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696379522] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:22,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:22,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2025-04-13 20:24:22,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70488918] [2025-04-13 20:24:22,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:22,708 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-13 20:24:22,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:22,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-13 20:24:22,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2025-04-13 20:24:22,709 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:24:22,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 769 places, 2867 transitions, 100208 flow. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:24:22,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:22,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:24:22,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:24:35,449 INFO L116 PetriNetUnfolderBase]: 14319/21093 cut-off events. [2025-04-13 20:24:35,450 INFO L117 PetriNetUnfolderBase]: For 1443161/1443161 co-relation queries the response was YES. [2025-04-13 20:24:35,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306447 conditions, 21093 events. 14319/21093 cut-off events. For 1443161/1443161 co-relation queries the response was YES. Maximal size of possible extension queue 1532. Compared 138915 event pairs, 2612 based on Foata normal form. 26/21119 useless extension candidates. Maximal degree in co-relation 305806. Up to 16134 conditions per place. [2025-04-13 20:24:35,886 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 2156 selfloop transitions, 923 changer transitions 0/3079 dead transitions. [2025-04-13 20:24:35,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 788 places, 3079 transitions, 110584 flow [2025-04-13 20:24:35,886 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-13 20:24:35,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-13 20:24:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 206 transitions. [2025-04-13 20:24:35,887 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2025-04-13 20:24:35,887 INFO L175 Difference]: Start difference. First operand has 769 places, 2867 transitions, 100208 flow. Second operand 21 states and 206 transitions. [2025-04-13 20:24:35,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 788 places, 3079 transitions, 110584 flow [2025-04-13 20:24:59,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 3079 transitions, 109666 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-04-13 20:24:59,358 INFO L231 Difference]: Finished difference. Result has 796 places, 2925 transitions, 103213 flow [2025-04-13 20:24:59,359 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=99031, PETRI_DIFFERENCE_MINUEND_PLACES=764, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=860, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1970, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=103213, PETRI_PLACES=796, PETRI_TRANSITIONS=2925} [2025-04-13 20:24:59,359 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 769 predicate places. [2025-04-13 20:24:59,359 INFO L485 AbstractCegarLoop]: Abstraction has has 796 places, 2925 transitions, 103213 flow [2025-04-13 20:24:59,359 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:24:59,359 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:24:59,360 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:24:59,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2025-04-13 20:24:59,560 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:59,560 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:24:59,561 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:24:59,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1638789968, now seen corresponding path program 26 times [2025-04-13 20:24:59,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:24:59,561 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765716407] [2025-04-13 20:24:59,561 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:24:59,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:24:59,563 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:24:59,566 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:24:59,566 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:24:59,566 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:24:59,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:24:59,638 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765716407] [2025-04-13 20:24:59,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765716407] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:24:59,638 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721422472] [2025-04-13 20:24:59,638 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:24:59,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:24:59,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:24:59,640 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:24:59,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2025-04-13 20:24:59,665 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:24:59,677 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:24:59,677 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 20:24:59,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:24:59,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-13 20:24:59,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:24:59,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:24:59,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:24:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:24:59,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721422472] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:24:59,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:24:59,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2025-04-13 20:24:59,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519397068] [2025-04-13 20:24:59,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:24:59,830 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 20:24:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:24:59,830 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 20:24:59,830 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-04-13 20:24:59,831 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:24:59,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 2925 transitions, 103213 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:24:59,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:24:59,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:24:59,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:25:13,538 INFO L116 PetriNetUnfolderBase]: 14488/21334 cut-off events. [2025-04-13 20:25:13,539 INFO L117 PetriNetUnfolderBase]: For 1495065/1495065 co-relation queries the response was YES. [2025-04-13 20:25:13,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313202 conditions, 21334 events. 14488/21334 cut-off events. For 1495065/1495065 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 140643 event pairs, 2440 based on Foata normal form. 30/21364 useless extension candidates. Maximal degree in co-relation 312547. Up to 16838 conditions per place. [2025-04-13 20:25:13,965 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1870 selfloop transitions, 1254 changer transitions 0/3124 dead transitions. [2025-04-13 20:25:13,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 812 places, 3124 transitions, 114118 flow [2025-04-13 20:25:13,966 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-13 20:25:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-13 20:25:13,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 184 transitions. [2025-04-13 20:25:13,966 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2025-04-13 20:25:13,966 INFO L175 Difference]: Start difference. First operand has 796 places, 2925 transitions, 103213 flow. Second operand 17 states and 184 transitions. [2025-04-13 20:25:13,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 812 places, 3124 transitions, 114118 flow [2025-04-13 20:25:38,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 805 places, 3124 transitions, 112268 flow, removed 187 selfloop flow, removed 7 redundant places. [2025-04-13 20:25:38,535 INFO L231 Difference]: Finished difference. Result has 815 places, 3013 transitions, 107624 flow [2025-04-13 20:25:38,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=101324, PETRI_DIFFERENCE_MINUEND_PLACES=789, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=107624, PETRI_PLACES=815, PETRI_TRANSITIONS=3013} [2025-04-13 20:25:38,537 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 788 predicate places. [2025-04-13 20:25:38,537 INFO L485 AbstractCegarLoop]: Abstraction has has 815 places, 3013 transitions, 107624 flow [2025-04-13 20:25:38,537 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:25:38,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:25:38,537 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:25:38,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2025-04-13 20:25:38,738 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:38,738 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:25:38,739 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:25:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash -400079070, now seen corresponding path program 27 times [2025-04-13 20:25:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:25:38,739 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806118674] [2025-04-13 20:25:38,739 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:25:38,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:25:38,742 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:25:38,746 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:25:38,746 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:25:38,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:38,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:25:38,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:25:38,823 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806118674] [2025-04-13 20:25:38,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806118674] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 20:25:38,823 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004502843] [2025-04-13 20:25:38,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:25:38,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:38,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:25:38,825 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 20:25:38,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2025-04-13 20:25:38,852 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-13 20:25:38,867 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 20:25:38,868 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-13 20:25:38,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:25:38,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-13 20:25:38,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 20:25:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:25:38,995 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 20:25:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:25:39,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004502843] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 20:25:39,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 20:25:39,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2025-04-13 20:25:39,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852514992] [2025-04-13 20:25:39,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 20:25:39,136 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-13 20:25:39,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:25:39,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-13 20:25:39,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2025-04-13 20:25:39,137 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-13 20:25:39,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 815 places, 3013 transitions, 107624 flow. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:25:39,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:25:39,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-13 20:25:39,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2025-04-13 20:25:50,831 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 20:25:50,835 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-13 20:25:51,229 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-04-13 20:25:51,237 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-04-13 20:25:51,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2025-04-13 20:25:51,437 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 20:25:51,438 WARN L610 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 3/24 universal loopers) in iteration 64,while PetriNetUnfolder was constructing finite prefix that currently has 264173 conditions, 16909 events (11974/16908 cut-off events. For 1251678/1251678 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 108350 event pairs, 1572 based on Foata normal form. 13/17866 useless extension candidates. Maximal degree in co-relation 263539. Up to 7051 conditions per place.). [2025-04-13 20:25:51,440 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-13 20:25:51,440 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-13 20:25:51,440 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-04-13 20:25:51,440 INFO L422 BasicCegarLoop]: Path program histogram: [30, 27, 6, 1] [2025-04-13 20:25:51,450 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 20:25:51,450 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 20:25:51,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 08:25:51 BasicIcfg [2025-04-13 20:25:51,459 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 20:25:51,460 INFO L158 Benchmark]: Toolchain (without parser) took 800514.84ms. Allocated memory was 155.2MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 107.2MB in the beginning and 2.1GB in the end (delta: -2.0GB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. [2025-04-13 20:25:51,460 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:25:51,460 INFO L158 Benchmark]: CACSL2BoogieTranslator took 187.00ms. Allocated memory is still 155.2MB. Free memory was 107.2MB in the beginning and 92.7MB in the end (delta: 14.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-13 20:25:51,464 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.04ms. Allocated memory is still 155.2MB. Free memory was 92.7MB in the beginning and 91.2MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 20:25:51,465 INFO L158 Benchmark]: Boogie Preprocessor took 33.18ms. Allocated memory is still 155.2MB. Free memory was 91.2MB in the beginning and 89.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:25:51,465 INFO L158 Benchmark]: RCFGBuilder took 334.39ms. Allocated memory is still 155.2MB. Free memory was 89.9MB in the beginning and 62.5MB in the end (delta: 27.4MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-13 20:25:51,465 INFO L158 Benchmark]: TraceAbstraction took 799932.05ms. Allocated memory was 155.2MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 61.8MB in the beginning and 2.1GB in the end (delta: -2.1GB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. [2025-04-13 20:25:51,466 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 86.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 187.00ms. Allocated memory is still 155.2MB. Free memory was 107.2MB in the beginning and 92.7MB in the end (delta: 14.5MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.04ms. Allocated memory is still 155.2MB. Free memory was 92.7MB in the beginning and 91.2MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.18ms. Allocated memory is still 155.2MB. Free memory was 91.2MB in the beginning and 89.9MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 334.39ms. Allocated memory is still 155.2MB. Free memory was 89.9MB in the beginning and 62.5MB in the end (delta: 27.4MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 799932.05ms. Allocated memory was 155.2MB in the beginning and 4.2GB in the end (delta: 4.1GB). Free memory was 61.8MB in the beginning and 2.1GB in the end (delta: -2.1GB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 3/24 universal loopers) in iteration 64,while PetriNetUnfolder was constructing finite prefix that currently has 264173 conditions, 16909 events (11974/16908 cut-off events. For 1251678/1251678 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 108350 event pairs, 1572 based on Foata normal form. 13/17866 useless extension candidates. Maximal degree in co-relation 263539. Up to 7051 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 3/24 universal loopers) in iteration 64,while PetriNetUnfolder was constructing finite prefix that currently has 264173 conditions, 16909 events (11974/16908 cut-off events. For 1251678/1251678 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 108350 event pairs, 1572 based on Foata normal form. 13/17866 useless extension candidates. Maximal degree in co-relation 263539. Up to 7051 conditions per place.). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 3/24 universal loopers) in iteration 64,while PetriNetUnfolder was constructing finite prefix that currently has 264173 conditions, 16909 events (11974/16908 cut-off events. For 1251678/1251678 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 108350 event pairs, 1572 based on Foata normal form. 13/17866 useless extension candidates. Maximal degree in co-relation 263539. Up to 7051 conditions per place.). - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (20states, 3/24 universal loopers) in iteration 64,while PetriNetUnfolder was constructing finite prefix that currently has 264173 conditions, 16909 events (11974/16908 cut-off events. For 1251678/1251678 co-relation queries the response was YES. Maximal size of possible extension queue 1581. Compared 108350 event pairs, 1572 based on Foata normal form. 13/17866 useless extension candidates. Maximal degree in co-relation 263539. Up to 7051 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 34 locations, 39 edges, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 799.8s, OverallIterations: 64, TraceHistogramMax: 1, PathProgramHistogramMax: 30, EmptinessCheckTime: 0.0s, AutomataDifference: 770.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 3680 SdHoareTripleChecker+Valid, 26.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3680 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 24.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 439 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28157 IncrementalHoareTripleChecker+Invalid, 28598 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 439 mSolverCounterUnsat, 0 mSDtfsCounter, 28157 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2486 GetRequests, 1480 SyntacticMatches, 58 SemanticMatches, 948 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4317 ImplicationChecksByTransitivity, 29.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107624occurred in iteration=63, InterpolantAutomatonStates: 805, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 14.8s InterpolantComputationTime, 2141 NumberOfCodeBlocks, 2141 NumberOfCodeBlocksAsserted, 221 NumberOfCheckSat, 2753 ConstructedInterpolants, 0 QuantifiedInterpolants, 15856 SizeOfPredicates, 215 NumberOfNonLiveVariables, 7095 ConjunctsInSsa, 720 ConjunctsInUnsatCore, 162 InterpolantComputations, 30 PerfectInterpolantSequences, 29/161 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, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown