/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/pthread-theta/exponential-nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 21:07:05,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 21:07:05,594 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 21:07:05,597 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 21:07:05,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 21:07:05,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 21:07:05,620 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 21:07:05,620 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 21:07:05,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 21:07:05,620 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 21:07:05,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 21:07:05,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 21:07:05,620 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 21:07:05,621 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 21:07:05,622 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 21:07:05,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 21:07:05,622 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 21:07:05,622 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 21:07:05,622 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 21:07:05,622 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 21:07:05,622 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 21:07:05,622 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 21:07:05,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 21:07:05,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 21:07:05,623 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 21:07:05,623 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 21:07:05,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 21:07:05,623 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 21:07:05,624 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 21:07:05,624 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 21:07:05,624 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 21:07:05,624 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 21:07:05,624 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 21:07:05,624 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 21:07:05,624 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 21:07:05,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 21:07:05,624 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 21:07:05,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 21:07:05,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 21:07:05,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 21:07:05,824 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 21:07:05,824 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 21:07:05,825 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-theta/exponential-nondet.i [2025-04-13 21:07:07,094 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c6af239/cec5b8b1daf6443885f49436da911a93/FLAG0a1c3dc53 [2025-04-13 21:07:07,308 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 21:07:07,309 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-theta/exponential-nondet.i [2025-04-13 21:07:07,321 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c6af239/cec5b8b1daf6443885f49436da911a93/FLAG0a1c3dc53 [2025-04-13 21:07:09,196 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67c6af239/cec5b8b1daf6443885f49436da911a93 [2025-04-13 21:07:09,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 21:07:09,199 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 21:07:09,199 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 21:07:09,200 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 21:07:09,202 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 21:07:09,202 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,203 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a530c31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09, skipping insertion in model container [2025-04-13 21:07:09,203 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,224 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 21:07:09,507 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-theta/exponential-nondet.i[33030,33043] [2025-04-13 21:07:09,524 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 21:07:09,532 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 21:07:09,593 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-theta/exponential-nondet.i[33030,33043] [2025-04-13 21:07:09,597 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 21:07:09,629 INFO L204 MainTranslator]: Completed translation [2025-04-13 21:07:09,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09 WrapperNode [2025-04-13 21:07:09,630 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 21:07:09,630 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 21:07:09,630 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 21:07:09,630 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 21:07:09,635 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,643 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,661 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2025-04-13 21:07:09,661 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 21:07:09,662 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 21:07:09,662 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 21:07:09,662 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 21:07:09,667 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,670 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,684 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 21:07:09,684 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,685 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,690 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,690 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,693 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,695 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,696 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,701 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 21:07:09,702 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 21:07:09,702 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 21:07:09,702 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 21:07:09,703 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (1/1) ... [2025-04-13 21:07:09,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 21:07:09,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:09,723 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 21:07:09,725 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 21:07:09,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 21:07:09,738 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-04-13 21:07:09,738 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-04-13 21:07:09,738 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-04-13 21:07:09,739 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-04-13 21:07:09,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 21:07:09,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 21:07:09,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 21:07:09,739 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 21:07:09,827 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 21:07:09,828 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 21:07:09,908 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 21:07:09,909 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 21:07:09,909 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 21:07:10,002 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 21:07:10,007 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 21:07:10,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 09:07:10 BoogieIcfgContainer [2025-04-13 21:07:10,008 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 21:07:10,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 21:07:10,009 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 21:07:10,012 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 21:07:10,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 09:07:09" (1/3) ... [2025-04-13 21:07:10,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564c2006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 09:07:10, skipping insertion in model container [2025-04-13 21:07:10,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 09:07:09" (2/3) ... [2025-04-13 21:07:10,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564c2006 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 09:07:10, skipping insertion in model container [2025-04-13 21:07:10,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 09:07:10" (3/3) ... [2025-04-13 21:07:10,014 INFO L128 eAbstractionObserver]: Analyzing ICFG exponential-nondet.i [2025-04-13 21:07:10,023 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 21:07:10,024 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG exponential-nondet.i that has 3 procedures, 16 locations, 16 edges, 1 initial locations, 2 loop locations, and 1 error locations. [2025-04-13 21:07:10,024 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 21:07:10,048 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 21:07:10,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 18 transitions, 44 flow [2025-04-13 21:07:10,084 INFO L116 PetriNetUnfolderBase]: 2/20 cut-off events. [2025-04-13 21:07:10,085 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 21:07:10,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 20 events. 2/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 15. Up to 4 conditions per place. [2025-04-13 21:07:10,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 18 transitions, 44 flow [2025-04-13 21:07:10,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 16 transitions, 39 flow [2025-04-13 21:07:10,099 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 21:07:10,109 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;@2ac827ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 21:07:10,111 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 21:07:10,114 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 21:07:10,114 INFO L116 PetriNetUnfolderBase]: 1/3 cut-off events. [2025-04-13 21:07:10,114 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 21:07:10,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:10,114 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1] [2025-04-13 21:07:10,115 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:10,118 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:10,118 INFO L85 PathProgramCache]: Analyzing trace with hash 6714, now seen corresponding path program 1 times [2025-04-13 21:07:10,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:10,123 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948502295] [2025-04-13 21:07:10,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:10,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:10,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:10,212 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:10,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:10,214 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560137397] [2025-04-13 21:07:10,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:10,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:10,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:10,216 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 21:07:10,217 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 21:07:10,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:10,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:10,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:10,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:10,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 21:07:10,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:10,277 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 21:07:10,278 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 21:07:10,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:10,278 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948502295] [2025-04-13 21:07:10,278 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:10,278 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560137397] [2025-04-13 21:07:10,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560137397] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:07:10,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:07:10,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 21:07:10,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859897719] [2025-04-13 21:07:10,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:10,284 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:07:10,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:10,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:07:10,303 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 21:07:10,312 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 18 [2025-04-13 21:07:10,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 21:07:10,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:10,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 18 [2025-04-13 21:07:10,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:10,348 INFO L116 PetriNetUnfolderBase]: 31/66 cut-off events. [2025-04-13 21:07:10,348 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 21:07:10,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 66 events. 31/66 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 193 event pairs, 4 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 123. Up to 47 conditions per place. [2025-04-13 21:07:10,349 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 15 selfloop transitions, 2 changer transitions 1/22 dead transitions. [2025-04-13 21:07:10,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 90 flow [2025-04-13 21:07:10,350 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:10,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 34 transitions. [2025-04-13 21:07:10,357 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2025-04-13 21:07:10,358 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 39 flow. Second operand 3 states and 34 transitions. [2025-04-13 21:07:10,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 90 flow [2025-04-13 21:07:10,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 21:07:10,361 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 44 flow [2025-04-13 21:07:10,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2025-04-13 21:07:10,364 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2025-04-13 21:07:10,365 INFO L485 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 44 flow [2025-04-13 21:07:10,365 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 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 21:07:10,365 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:10,365 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-13 21:07:10,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-13 21:07:10,565 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-04-13 21:07:10,566 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:10,566 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:10,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1960201831, now seen corresponding path program 1 times [2025-04-13 21:07:10,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:10,566 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589314184] [2025-04-13 21:07:10,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:10,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:10,574 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 21:07:10,578 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 21:07:10,578 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:10,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 21:07:10,578 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 21:07:10,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-13 21:07:10,585 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-13 21:07:10,585 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:10,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 21:07:10,594 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 21:07:10,594 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 21:07:10,594 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-04-13 21:07:10,595 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-04-13 21:07:10,596 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 21:07:10,596 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 21:07:10,596 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-04-13 21:07:10,597 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 21:07:10,597 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-04-13 21:07:10,611 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 21:07:10,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 26 transitions, 72 flow [2025-04-13 21:07:10,617 INFO L116 PetriNetUnfolderBase]: 3/34 cut-off events. [2025-04-13 21:07:10,617 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 21:07:10,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 34 events. 3/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 60 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 33. Up to 6 conditions per place. [2025-04-13 21:07:10,617 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 26 transitions, 72 flow [2025-04-13 21:07:10,618 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 24 transitions, 66 flow [2025-04-13 21:07:10,618 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 21:07:10,619 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;@2ac827ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 21:07:10,619 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 21:07:10,620 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 21:07:10,622 INFO L116 PetriNetUnfolderBase]: 1/3 cut-off events. [2025-04-13 21:07:10,622 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 21:07:10,623 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:10,623 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1] [2025-04-13 21:07:10,623 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:10,623 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:10,623 INFO L85 PathProgramCache]: Analyzing trace with hash 7546, now seen corresponding path program 1 times [2025-04-13 21:07:10,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:10,623 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075897775] [2025-04-13 21:07:10,623 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:10,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:10,634 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:10,645 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:10,645 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:10,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:10,646 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146355964] [2025-04-13 21:07:10,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:10,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:10,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:10,648 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 21:07:10,649 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 21:07:10,689 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:10,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:10,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:10,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:10,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 21:07:10,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:10,699 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 21:07:10,699 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 21:07:10,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:10,699 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075897775] [2025-04-13 21:07:10,699 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:10,699 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146355964] [2025-04-13 21:07:10,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146355964] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:07:10,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:07:10,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 21:07:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128787675] [2025-04-13 21:07:10,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:10,700 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:07:10,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:10,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:07:10,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 21:07:10,707 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 26 [2025-04-13 21:07:10,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 66 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 21:07:10,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:10,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 26 [2025-04-13 21:07:10,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:10,799 INFO L116 PetriNetUnfolderBase]: 427/646 cut-off events. [2025-04-13 21:07:10,799 INFO L117 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2025-04-13 21:07:10,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 646 events. 427/646 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2829 event pairs, 80 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 687. Up to 587 conditions per place. [2025-04-13 21:07:10,808 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 24 selfloop transitions, 3 changer transitions 1/35 dead transitions. [2025-04-13 21:07:10,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 157 flow [2025-04-13 21:07:10,809 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-04-13 21:07:10,810 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6794871794871795 [2025-04-13 21:07:10,810 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 66 flow. Second operand 3 states and 53 transitions. [2025-04-13 21:07:10,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 157 flow [2025-04-13 21:07:10,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 21:07:10,812 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 82 flow [2025-04-13 21:07:10,813 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2025-04-13 21:07:10,813 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2025-04-13 21:07:10,813 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 82 flow [2025-04-13 21:07:10,814 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 21:07:10,814 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:10,814 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:10,819 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 21:07:11,014 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-04-13 21:07:11,014 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:11,015 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:11,015 INFO L85 PathProgramCache]: Analyzing trace with hash 640588881, now seen corresponding path program 1 times [2025-04-13 21:07:11,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:11,015 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044052719] [2025-04-13 21:07:11,015 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:11,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:11,021 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 21:07:11,030 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 21:07:11,030 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:11,030 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:11,138 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 21:07:11,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:11,138 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044052719] [2025-04-13 21:07:11,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044052719] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:07:11,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:07:11,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 21:07:11,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050846921] [2025-04-13 21:07:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:11,139 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 21:07:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:11,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 21:07:11,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 21:07:11,139 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 26 [2025-04-13 21:07:11,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 21:07:11,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:11,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 26 [2025-04-13 21:07:11,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:11,209 INFO L116 PetriNetUnfolderBase]: 279/492 cut-off events. [2025-04-13 21:07:11,209 INFO L117 PetriNetUnfolderBase]: For 52/62 co-relation queries the response was YES. [2025-04-13 21:07:11,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 492 events. 279/492 cut-off events. For 52/62 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2705 event pairs, 158 based on Foata normal form. 25/438 useless extension candidates. Maximal degree in co-relation 808. Up to 350 conditions per place. [2025-04-13 21:07:11,216 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 16 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2025-04-13 21:07:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 130 flow [2025-04-13 21:07:11,217 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 21:07:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 21:07:11,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2025-04-13 21:07:11,218 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2025-04-13 21:07:11,218 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 82 flow. Second operand 4 states and 60 transitions. [2025-04-13 21:07:11,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 130 flow [2025-04-13 21:07:11,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 21:07:11,219 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 93 flow [2025-04-13 21:07:11,219 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2025-04-13 21:07:11,220 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2025-04-13 21:07:11,220 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 93 flow [2025-04-13 21:07:11,220 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 21:07:11,220 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:11,220 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:11,220 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 21:07:11,220 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:11,221 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:11,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2123743481, now seen corresponding path program 1 times [2025-04-13 21:07:11,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:11,222 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969491703] [2025-04-13 21:07:11,222 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:11,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:11,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 21:07:11,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:11,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:11,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:11,259 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1366127338] [2025-04-13 21:07:11,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:11,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:11,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:11,261 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 21:07:11,262 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 21:07:11,300 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 21:07:11,314 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:11,314 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:11,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:11,315 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 21:07:11,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:11,353 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 21:07:11,353 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:07:11,435 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 21:07:11,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:11,435 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969491703] [2025-04-13 21:07:11,435 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:11,435 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366127338] [2025-04-13 21:07:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366127338] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 21:07:11,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 21:07:11,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2025-04-13 21:07:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117849081] [2025-04-13 21:07:11,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:11,436 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 21:07:11,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:11,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 21:07:11,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-04-13 21:07:11,436 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 26 [2025-04-13 21:07:11,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 21:07:11,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:11,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 26 [2025-04-13 21:07:11,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:11,485 INFO L116 PetriNetUnfolderBase]: 215/392 cut-off events. [2025-04-13 21:07:11,486 INFO L117 PetriNetUnfolderBase]: For 86/118 co-relation queries the response was YES. [2025-04-13 21:07:11,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 392 events. 215/392 cut-off events. For 86/118 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2117 event pairs, 101 based on Foata normal form. 28/372 useless extension candidates. Maximal degree in co-relation 465. Up to 175 conditions per place. [2025-04-13 21:07:11,487 INFO L140 encePairwiseOnDemand]: 24/26 looper letters, 16 selfloop transitions, 1 changer transitions 1/29 dead transitions. [2025-04-13 21:07:11,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 131 flow [2025-04-13 21:07:11,488 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:11,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 48 transitions. [2025-04-13 21:07:11,488 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2025-04-13 21:07:11,488 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 93 flow. Second operand 3 states and 48 transitions. [2025-04-13 21:07:11,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 131 flow [2025-04-13 21:07:11,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 125 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-13 21:07:11,491 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 83 flow [2025-04-13 21:07:11,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2025-04-13 21:07:11,492 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2025-04-13 21:07:11,492 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 83 flow [2025-04-13 21:07:11,492 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 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 21:07:11,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:11,492 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:11,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-13 21:07:11,693 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:11,693 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:11,693 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:11,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1354297085, now seen corresponding path program 1 times [2025-04-13 21:07:11,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:11,694 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226534344] [2025-04-13 21:07:11,694 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:11,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:11,699 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 21:07:11,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 21:07:11,702 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:11,702 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 21:07:11,702 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 21:07:11,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-13 21:07:11,708 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-13 21:07:11,708 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:11,708 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 21:07:11,711 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 21:07:11,711 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 21:07:11,711 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-04-13 21:07:11,711 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-04-13 21:07:11,711 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 21:07:11,711 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 21:07:11,711 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2025-04-13 21:07:11,711 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 21:07:11,711 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-04-13 21:07:11,736 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 21:07:11,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 34 transitions, 104 flow [2025-04-13 21:07:11,742 INFO L116 PetriNetUnfolderBase]: 4/48 cut-off events. [2025-04-13 21:07:11,742 INFO L117 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-04-13 21:07:11,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 48 events. 4/48 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 86 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 55. Up to 8 conditions per place. [2025-04-13 21:07:11,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 34 transitions, 104 flow [2025-04-13 21:07:11,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 32 transitions, 97 flow [2025-04-13 21:07:11,743 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 21:07:11,744 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;@2ac827ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 21:07:11,744 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 21:07:11,745 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 21:07:11,745 INFO L116 PetriNetUnfolderBase]: 1/3 cut-off events. [2025-04-13 21:07:11,745 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 21:07:11,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:11,745 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1] [2025-04-13 21:07:11,745 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:11,745 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:11,745 INFO L85 PathProgramCache]: Analyzing trace with hash 8634, now seen corresponding path program 1 times [2025-04-13 21:07:11,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:11,745 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011114998] [2025-04-13 21:07:11,745 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:11,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:11,752 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:11,755 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:11,755 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:11,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:11,756 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684500863] [2025-04-13 21:07:11,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:11,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:11,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:11,758 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 21:07:11,760 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 21:07:11,802 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:11,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:11,806 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:11,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:11,807 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 21:07:11,808 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:11,811 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 21:07:11,811 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 21:07:11,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:11,811 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011114998] [2025-04-13 21:07:11,811 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:11,811 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684500863] [2025-04-13 21:07:11,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684500863] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:07:11,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:07:11,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 21:07:11,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292283382] [2025-04-13 21:07:11,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:11,812 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:07:11,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:11,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:07:11,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 21:07:11,827 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-04-13 21:07:11,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 21:07:11,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:11,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-04-13 21:07:11,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:12,180 INFO L116 PetriNetUnfolderBase]: 4099/5406 cut-off events. [2025-04-13 21:07:12,181 INFO L117 PetriNetUnfolderBase]: For 930/930 co-relation queries the response was YES. [2025-04-13 21:07:12,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11447 conditions, 5406 events. 4099/5406 cut-off events. For 930/930 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 24523 event pairs, 2526 based on Foata normal form. 0/4878 useless extension candidates. Maximal degree in co-relation 9603. Up to 5251 conditions per place. [2025-04-13 21:07:12,212 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 32 selfloop transitions, 4 changer transitions 1/47 dead transitions. [2025-04-13 21:07:12,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 47 transitions, 228 flow [2025-04-13 21:07:12,212 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:12,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2025-04-13 21:07:12,215 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.696078431372549 [2025-04-13 21:07:12,215 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 97 flow. Second operand 3 states and 71 transitions. [2025-04-13 21:07:12,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 47 transitions, 228 flow [2025-04-13 21:07:12,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 218 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-04-13 21:07:12,217 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 116 flow [2025-04-13 21:07:12,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2025-04-13 21:07:12,219 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2025-04-13 21:07:12,219 INFO L485 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 116 flow [2025-04-13 21:07:12,219 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 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 21:07:12,219 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:12,219 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:12,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-13 21:07:12,421 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 21:07:12,421 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:12,422 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:12,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1322665274, now seen corresponding path program 1 times [2025-04-13 21:07:12,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:12,422 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986446203] [2025-04-13 21:07:12,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:12,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:12,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 21:07:12,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 21:07:12,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:12,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:12,464 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 21:07:12,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:12,464 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986446203] [2025-04-13 21:07:12,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986446203] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:07:12,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:07:12,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 21:07:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443181837] [2025-04-13 21:07:12,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:12,464 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 21:07:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:12,465 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 21:07:12,465 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 21:07:12,465 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2025-04-13 21:07:12,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 21:07:12,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:12,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2025-04-13 21:07:12,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:12,850 INFO L116 PetriNetUnfolderBase]: 2495/3728 cut-off events. [2025-04-13 21:07:12,850 INFO L117 PetriNetUnfolderBase]: For 608/656 co-relation queries the response was YES. [2025-04-13 21:07:12,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 3728 events. 2495/3728 cut-off events. For 608/656 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 23480 event pairs, 1558 based on Foata normal form. 143/3243 useless extension candidates. Maximal degree in co-relation 5544. Up to 2654 conditions per place. [2025-04-13 21:07:12,879 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 22 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2025-04-13 21:07:12,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 180 flow [2025-04-13 21:07:12,880 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 21:07:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 21:07:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2025-04-13 21:07:12,881 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6029411764705882 [2025-04-13 21:07:12,881 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 116 flow. Second operand 4 states and 82 transitions. [2025-04-13 21:07:12,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 180 flow [2025-04-13 21:07:12,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 41 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 21:07:12,883 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 126 flow [2025-04-13 21:07:12,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2025-04-13 21:07:12,883 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2025-04-13 21:07:12,883 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 126 flow [2025-04-13 21:07:12,884 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 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 21:07:12,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:12,884 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:12,884 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-13 21:07:12,884 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:12,884 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2136536068, now seen corresponding path program 1 times [2025-04-13 21:07:12,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:12,884 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577233158] [2025-04-13 21:07:12,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:12,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:12,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 21:07:12,904 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:12,904 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:12,904 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:12,909 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421178132] [2025-04-13 21:07:12,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:12,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:12,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:12,911 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 21:07:12,912 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 21:07:12,954 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 21:07:12,963 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:12,964 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:12,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:12,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 21:07:12,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:12,997 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 21:07:12,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:07:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 21:07:13,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:13,038 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577233158] [2025-04-13 21:07:13,038 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:13,038 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421178132] [2025-04-13 21:07:13,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421178132] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 21:07:13,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 21:07:13,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2025-04-13 21:07:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468730552] [2025-04-13 21:07:13,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:13,039 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:07:13,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:13,039 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:07:13,039 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-04-13 21:07:13,133 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 34 [2025-04-13 21:07:13,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:07:13,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:13,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 34 [2025-04-13 21:07:13,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:13,572 INFO L116 PetriNetUnfolderBase]: 6537/8589 cut-off events. [2025-04-13 21:07:13,572 INFO L117 PetriNetUnfolderBase]: For 3786/3786 co-relation queries the response was YES. [2025-04-13 21:07:13,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21759 conditions, 8589 events. 6537/8589 cut-off events. For 3786/3786 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 42406 event pairs, 3013 based on Foata normal form. 244/8801 useless extension candidates. Maximal degree in co-relation 21075. Up to 6497 conditions per place. [2025-04-13 21:07:13,616 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 36 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2025-04-13 21:07:13,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 288 flow [2025-04-13 21:07:13,616 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2025-04-13 21:07:13,617 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7156862745098039 [2025-04-13 21:07:13,617 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 126 flow. Second operand 3 states and 73 transitions. [2025-04-13 21:07:13,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 288 flow [2025-04-13 21:07:13,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 278 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-13 21:07:13,621 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 178 flow [2025-04-13 21:07:13,621 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2025-04-13 21:07:13,622 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2025-04-13 21:07:13,622 INFO L485 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 178 flow [2025-04-13 21:07:13,622 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 21:07:13,622 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:13,622 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:13,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-13 21:07:13,822 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:13,823 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:13,823 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:13,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1947030138, now seen corresponding path program 2 times [2025-04-13 21:07:13,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:13,823 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092419731] [2025-04-13 21:07:13,823 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:07:13,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:13,828 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-04-13 21:07:13,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:13,844 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:07:13,844 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:13,844 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044578288] [2025-04-13 21:07:13,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:07:13,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:13,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:13,846 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 21:07:13,847 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 21:07:13,887 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-04-13 21:07:13,898 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:13,898 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:07:13,898 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:13,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 21:07:13,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:13,919 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 21:07:13,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:07:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 21:07:13,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:13,951 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092419731] [2025-04-13 21:07:13,951 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:13,951 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044578288] [2025-04-13 21:07:13,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044578288] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 21:07:13,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 21:07:13,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2025-04-13 21:07:13,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299072580] [2025-04-13 21:07:13,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:13,951 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:07:13,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:13,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:07:13,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-04-13 21:07:13,952 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 34 [2025-04-13 21:07:13,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 21:07:13,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:13,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 34 [2025-04-13 21:07:13,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:14,328 INFO L116 PetriNetUnfolderBase]: 3409/5008 cut-off events. [2025-04-13 21:07:14,328 INFO L117 PetriNetUnfolderBase]: For 2997/3445 co-relation queries the response was YES. [2025-04-13 21:07:14,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11885 conditions, 5008 events. 3409/5008 cut-off events. For 2997/3445 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31347 event pairs, 1111 based on Foata normal form. 266/4693 useless extension candidates. Maximal degree in co-relation 4437. Up to 2954 conditions per place. [2025-04-13 21:07:14,346 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 15 selfloop transitions, 0 changer transitions 13/44 dead transitions. [2025-04-13 21:07:14,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 232 flow [2025-04-13 21:07:14,348 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2025-04-13 21:07:14,350 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2025-04-13 21:07:14,350 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 178 flow. Second operand 3 states and 66 transitions. [2025-04-13 21:07:14,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 232 flow [2025-04-13 21:07:14,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 44 transitions, 210 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-04-13 21:07:14,357 INFO L231 Difference]: Finished difference. Result has 50 places, 31 transitions, 112 flow [2025-04-13 21:07:14,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=31} [2025-04-13 21:07:14,359 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2025-04-13 21:07:14,359 INFO L485 AbstractCegarLoop]: Abstraction has has 50 places, 31 transitions, 112 flow [2025-04-13 21:07:14,359 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 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 21:07:14,359 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:14,359 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:14,366 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 21:07:14,560 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:14,560 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:14,560 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:14,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1665021573, now seen corresponding path program 1 times [2025-04-13 21:07:14,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:14,561 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769812558] [2025-04-13 21:07:14,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:14,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:14,567 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 21:07:14,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 21:07:14,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:14,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 21:07:14,572 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 21:07:14,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 21:07:14,580 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 21:07:14,580 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:14,580 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 21:07:14,586 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 21:07:14,587 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 21:07:14,587 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-04-13 21:07:14,587 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-04-13 21:07:14,587 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 21:07:14,587 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-04-13 21:07:14,587 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2025-04-13 21:07:14,587 WARN L247 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 21:07:14,587 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-04-13 21:07:14,606 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 21:07:14,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 42 transitions, 140 flow [2025-04-13 21:07:14,615 INFO L116 PetriNetUnfolderBase]: 5/62 cut-off events. [2025-04-13 21:07:14,615 INFO L117 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-04-13 21:07:14,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 62 events. 5/62 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 113 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 79. Up to 10 conditions per place. [2025-04-13 21:07:14,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 42 transitions, 140 flow [2025-04-13 21:07:14,615 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 40 transitions, 132 flow [2025-04-13 21:07:14,618 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 21:07:14,618 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;@2ac827ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 21:07:14,618 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 21:07:14,619 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 21:07:14,619 INFO L116 PetriNetUnfolderBase]: 1/3 cut-off events. [2025-04-13 21:07:14,619 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 21:07:14,619 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:14,619 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1] [2025-04-13 21:07:14,619 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:14,619 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:14,619 INFO L85 PathProgramCache]: Analyzing trace with hash 9978, now seen corresponding path program 1 times [2025-04-13 21:07:14,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:14,619 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820913001] [2025-04-13 21:07:14,619 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:14,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:14,623 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:14,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:14,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:14,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:14,626 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1844799729] [2025-04-13 21:07:14,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:14,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:14,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:14,628 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 21:07:14,629 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 21:07:14,668 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:14,672 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:14,672 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:14,672 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:14,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 21:07:14,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:14,678 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 21:07:14,678 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 21:07:14,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:14,678 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820913001] [2025-04-13 21:07:14,678 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:14,678 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844799729] [2025-04-13 21:07:14,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844799729] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:07:14,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:07:14,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 21:07:14,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996579360] [2025-04-13 21:07:14,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:14,678 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:07:14,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:14,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:07:14,679 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 21:07:14,692 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2025-04-13 21:07:14,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 21:07:14,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:14,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2025-04-13 21:07:14,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:16,811 INFO L116 PetriNetUnfolderBase]: 33811/41614 cut-off events. [2025-04-13 21:07:16,812 INFO L117 PetriNetUnfolderBase]: For 9578/9578 co-relation queries the response was YES. [2025-04-13 21:07:16,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88153 conditions, 41614 events. 33811/41614 cut-off events. For 9578/9578 co-relation queries the response was YES. Maximal size of possible extension queue 1923. Compared 197230 event pairs, 23778 based on Foata normal form. 0/38479 useless extension candidates. Maximal degree in co-relation 74391. Up to 41235 conditions per place. [2025-04-13 21:07:17,093 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 40 selfloop transitions, 5 changer transitions 1/59 dead transitions. [2025-04-13 21:07:17,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 59 transitions, 307 flow [2025-04-13 21:07:17,094 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2025-04-13 21:07:17,094 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7063492063492064 [2025-04-13 21:07:17,094 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 132 flow. Second operand 3 states and 89 transitions. [2025-04-13 21:07:17,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 59 transitions, 307 flow [2025-04-13 21:07:17,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 281 flow, removed 12 selfloop flow, removed 1 redundant places. [2025-04-13 21:07:17,100 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 150 flow [2025-04-13 21:07:17,100 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2025-04-13 21:07:17,100 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2025-04-13 21:07:17,100 INFO L485 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 150 flow [2025-04-13 21:07:17,100 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 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 21:07:17,100 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:17,101 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:17,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-13 21:07:17,301 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:17,301 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:17,302 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:17,302 INFO L85 PathProgramCache]: Analyzing trace with hash 464219129, now seen corresponding path program 1 times [2025-04-13 21:07:17,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:17,302 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050083584] [2025-04-13 21:07:17,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:17,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:17,308 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 21:07:17,311 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 21:07:17,312 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:17,312 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:17,354 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 21:07:17,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:17,355 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050083584] [2025-04-13 21:07:17,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050083584] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:07:17,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:07:17,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 21:07:17,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352527737] [2025-04-13 21:07:17,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:17,355 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 21:07:17,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:17,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 21:07:17,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 21:07:17,356 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2025-04-13 21:07:17,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 21:07:17,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:17,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2025-04-13 21:07:17,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:18,782 INFO L116 PetriNetUnfolderBase]: 19919/27160 cut-off events. [2025-04-13 21:07:18,782 INFO L117 PetriNetUnfolderBase]: For 4544/7280 co-relation queries the response was YES. [2025-04-13 21:07:18,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56154 conditions, 27160 events. 19919/27160 cut-off events. For 4544/7280 co-relation queries the response was YES. Maximal size of possible extension queue 1811. Compared 183302 event pairs, 15297 based on Foata normal form. 944/23319 useless extension candidates. Maximal degree in co-relation 38808. Up to 19254 conditions per place. [2025-04-13 21:07:18,985 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 28 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2025-04-13 21:07:18,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 230 flow [2025-04-13 21:07:18,986 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 21:07:18,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 21:07:18,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2025-04-13 21:07:18,987 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2025-04-13 21:07:18,987 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 150 flow. Second operand 4 states and 104 transitions. [2025-04-13 21:07:18,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 230 flow [2025-04-13 21:07:18,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 52 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 21:07:18,993 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 159 flow [2025-04-13 21:07:18,994 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2025-04-13 21:07:18,994 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2025-04-13 21:07:18,994 INFO L485 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 159 flow [2025-04-13 21:07:18,994 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 21:07:18,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:18,994 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:18,994 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-04-13 21:07:18,994 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:18,994 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:18,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1714418745, now seen corresponding path program 1 times [2025-04-13 21:07:18,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:18,995 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426021951] [2025-04-13 21:07:18,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:18,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:18,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 21:07:19,008 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:19,008 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:19,008 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:19,013 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849504355] [2025-04-13 21:07:19,013 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:19,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:19,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:19,016 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 21:07:19,018 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 21:07:19,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 21:07:19,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:19,067 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:19,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:19,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 21:07:19,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:19,095 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 21:07:19,095 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:07:19,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 21:07:19,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:19,129 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426021951] [2025-04-13 21:07:19,129 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:19,129 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849504355] [2025-04-13 21:07:19,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849504355] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 21:07:19,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 21:07:19,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2025-04-13 21:07:19,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805504917] [2025-04-13 21:07:19,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:19,130 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:07:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:19,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:07:19,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-04-13 21:07:19,215 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2025-04-13 21:07:19,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 21:07:19,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:19,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2025-04-13 21:07:19,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:22,337 INFO L116 PetriNetUnfolderBase]: 54201/66605 cut-off events. [2025-04-13 21:07:22,338 INFO L117 PetriNetUnfolderBase]: For 22360/22360 co-relation queries the response was YES. [2025-04-13 21:07:22,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165569 conditions, 66605 events. 54201/66605 cut-off events. For 22360/22360 co-relation queries the response was YES. Maximal size of possible extension queue 3056. Compared 352353 event pairs, 17965 based on Foata normal form. 1524/68031 useless extension candidates. Maximal degree in co-relation 88787. Up to 51825 conditions per place. [2025-04-13 21:07:22,938 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 45 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2025-04-13 21:07:22,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 68 transitions, 365 flow [2025-04-13 21:07:22,939 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 92 transitions. [2025-04-13 21:07:22,940 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7301587301587301 [2025-04-13 21:07:22,940 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 159 flow. Second operand 3 states and 92 transitions. [2025-04-13 21:07:22,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 68 transitions, 365 flow [2025-04-13 21:07:22,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 68 transitions, 355 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-13 21:07:22,953 INFO L231 Difference]: Finished difference. Result has 63 places, 49 transitions, 225 flow [2025-04-13 21:07:22,953 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=63, PETRI_TRANSITIONS=49} [2025-04-13 21:07:22,954 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2025-04-13 21:07:22,954 INFO L485 AbstractCegarLoop]: Abstraction has has 63 places, 49 transitions, 225 flow [2025-04-13 21:07:22,954 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 21:07:22,954 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:22,954 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:22,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-13 21:07:23,154 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,SelfDestructingSolverStorable13 [2025-04-13 21:07:23,154 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:23,155 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:23,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1505473785, now seen corresponding path program 2 times [2025-04-13 21:07:23,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:23,155 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808666502] [2025-04-13 21:07:23,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:07:23,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:23,161 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-04-13 21:07:23,176 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:23,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:07:23,177 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:23,177 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450788643] [2025-04-13 21:07:23,177 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 21:07:23,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:23,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:23,179 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 21:07:23,181 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 21:07:23,223 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-04-13 21:07:23,232 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:23,232 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 21:07:23,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:23,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-13 21:07:23,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:23,255 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 21:07:23,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:07:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-13 21:07:23,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:23,280 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808666502] [2025-04-13 21:07:23,280 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:23,280 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450788643] [2025-04-13 21:07:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450788643] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 21:07:23,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 21:07:23,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2025-04-13 21:07:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702576050] [2025-04-13 21:07:23,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:23,281 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:07:23,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:23,281 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:07:23,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-04-13 21:07:23,282 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2025-04-13 21:07:23,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 49 transitions, 225 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 21:07:23,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:23,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2025-04-13 21:07:23,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:25,153 INFO L116 PetriNetUnfolderBase]: 27993/37512 cut-off events. [2025-04-13 21:07:25,153 INFO L117 PetriNetUnfolderBase]: For 23813/28129 co-relation queries the response was YES. [2025-04-13 21:07:25,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88399 conditions, 37512 events. 27993/37512 cut-off events. For 23813/28129 co-relation queries the response was YES. Maximal size of possible extension queue 2204. Compared 243406 event pairs, 9375 based on Foata normal form. 1778/34707 useless extension candidates. Maximal degree in co-relation 32509. Up to 22058 conditions per place. [2025-04-13 21:07:25,380 INFO L140 encePairwiseOnDemand]: 40/42 looper letters, 19 selfloop transitions, 0 changer transitions 16/56 dead transitions. [2025-04-13 21:07:25,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 56 transitions, 295 flow [2025-04-13 21:07:25,381 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:25,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2025-04-13 21:07:25,381 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-04-13 21:07:25,381 INFO L175 Difference]: Start difference. First operand has 63 places, 49 transitions, 225 flow. Second operand 3 states and 84 transitions. [2025-04-13 21:07:25,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 56 transitions, 295 flow [2025-04-13 21:07:25,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 56 transitions, 267 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-04-13 21:07:25,548 INFO L231 Difference]: Finished difference. Result has 62 places, 40 transitions, 147 flow [2025-04-13 21:07:25,548 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=147, PETRI_PLACES=62, PETRI_TRANSITIONS=40} [2025-04-13 21:07:25,549 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2025-04-13 21:07:25,549 INFO L485 AbstractCegarLoop]: Abstraction has has 62 places, 40 transitions, 147 flow [2025-04-13 21:07:25,549 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 21:07:25,549 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:25,550 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:25,555 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 21:07:25,750 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-13 21:07:25,750 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:25,751 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:25,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1864539825, now seen corresponding path program 1 times [2025-04-13 21:07:25,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:25,751 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391058065] [2025-04-13 21:07:25,751 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:25,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:25,756 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 21:07:25,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 21:07:25,759 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:25,759 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 21:07:25,759 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-13 21:07:25,761 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-13 21:07:25,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-13 21:07:25,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:25,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-13 21:07:25,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-13 21:07:25,769 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-13 21:07:25,769 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-04-13 21:07:25,769 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-04-13 21:07:25,769 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-13 21:07:25,769 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-04-13 21:07:25,769 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2025-04-13 21:07:25,770 WARN L247 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-13 21:07:25,770 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2025-04-13 21:07:25,789 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 21:07:25,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 50 transitions, 180 flow [2025-04-13 21:07:25,795 INFO L116 PetriNetUnfolderBase]: 6/76 cut-off events. [2025-04-13 21:07:25,795 INFO L117 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2025-04-13 21:07:25,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 76 events. 6/76 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 147 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 105. Up to 12 conditions per place. [2025-04-13 21:07:25,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 50 transitions, 180 flow [2025-04-13 21:07:25,795 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 48 transitions, 171 flow [2025-04-13 21:07:25,797 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 21:07:25,797 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;@2ac827ec, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 21:07:25,797 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 21:07:25,797 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 21:07:25,797 INFO L116 PetriNetUnfolderBase]: 1/3 cut-off events. [2025-04-13 21:07:25,798 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 21:07:25,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:25,798 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1] [2025-04-13 21:07:25,798 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:25,798 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:25,798 INFO L85 PathProgramCache]: Analyzing trace with hash 11578, now seen corresponding path program 1 times [2025-04-13 21:07:25,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:25,798 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64428112] [2025-04-13 21:07:25,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:25,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:25,803 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:25,805 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:25,805 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:25,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:25,806 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174729792] [2025-04-13 21:07:25,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:25,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:25,808 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 21:07:25,810 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 21:07:25,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-13 21:07:25,860 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-13 21:07:25,860 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:25,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:25,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-13 21:07:25,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:25,866 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 21:07:25,866 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-13 21:07:25,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:25,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64428112] [2025-04-13 21:07:25,867 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:25,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174729792] [2025-04-13 21:07:25,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174729792] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:07:25,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:07:25,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-13 21:07:25,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157210010] [2025-04-13 21:07:25,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:25,868 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 21:07:25,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:25,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 21:07:25,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 21:07:25,891 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2025-04-13 21:07:25,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 48 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:07:25,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:25,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2025-04-13 21:07:25,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:40,402 INFO L116 PetriNetUnfolderBase]: 257779/304494 cut-off events. [2025-04-13 21:07:40,402 INFO L117 PetriNetUnfolderBase]: For 87402/87402 co-relation queries the response was YES. [2025-04-13 21:07:41,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644955 conditions, 304494 events. 257779/304494 cut-off events. For 87402/87402 co-relation queries the response was YES. Maximal size of possible extension queue 10687. Compared 1481452 event pairs, 196283 based on Foata normal form. 0/285778 useless extension candidates. Maximal degree in co-relation 544315. Up to 303603 conditions per place. [2025-04-13 21:07:43,212 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 48 selfloop transitions, 6 changer transitions 1/71 dead transitions. [2025-04-13 21:07:43,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 71 transitions, 394 flow [2025-04-13 21:07:43,213 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 21:07:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 21:07:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2025-04-13 21:07:43,214 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.7133333333333334 [2025-04-13 21:07:43,214 INFO L175 Difference]: Start difference. First operand has 68 places, 48 transitions, 171 flow. Second operand 3 states and 107 transitions. [2025-04-13 21:07:43,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 71 transitions, 394 flow [2025-04-13 21:07:43,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 344 flow, removed 24 selfloop flow, removed 1 redundant places. [2025-04-13 21:07:43,249 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 184 flow [2025-04-13 21:07:43,249 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2025-04-13 21:07:43,249 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2025-04-13 21:07:43,249 INFO L485 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 184 flow [2025-04-13 21:07:43,249 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 21:07:43,249 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:43,249 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:43,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-04-13 21:07:43,450 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,SelfDestructingSolverStorable16 [2025-04-13 21:07:43,450 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:43,450 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:43,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2056761146, now seen corresponding path program 1 times [2025-04-13 21:07:43,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:43,451 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633454484] [2025-04-13 21:07:43,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:43,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-13 21:07:43,456 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-13 21:07:43,456 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:43,456 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:43,484 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 21:07:43,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:43,484 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633454484] [2025-04-13 21:07:43,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633454484] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 21:07:43,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 21:07:43,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-13 21:07:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457525472] [2025-04-13 21:07:43,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:43,485 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 21:07:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:43,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 21:07:43,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 21:07:43,485 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2025-04-13 21:07:43,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 21:07:43,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:43,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2025-04-13 21:07:43,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 21:07:54,168 INFO L116 PetriNetUnfolderBase]: 149071/191988 cut-off events. [2025-04-13 21:07:54,168 INFO L117 PetriNetUnfolderBase]: For 52724/56404 co-relation queries the response was YES. [2025-04-13 21:07:55,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396300 conditions, 191988 events. 149071/191988 cut-off events. For 52724/56404 co-relation queries the response was YES. Maximal size of possible extension queue 11237. Compared 1344022 event pairs, 105093 based on Foata normal form. 4770/162246 useless extension candidates. Maximal degree in co-relation 270552. Up to 135782 conditions per place. [2025-04-13 21:07:56,483 INFO L140 encePairwiseOnDemand]: 46/50 looper letters, 34 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2025-04-13 21:07:56,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 63 transitions, 280 flow [2025-04-13 21:07:56,484 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 21:07:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 21:07:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2025-04-13 21:07:56,484 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.63 [2025-04-13 21:07:56,485 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 184 flow. Second operand 4 states and 126 transitions. [2025-04-13 21:07:56,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 63 transitions, 280 flow [2025-04-13 21:07:56,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 63 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 21:07:56,683 INFO L231 Difference]: Finished difference. Result has 73 places, 53 transitions, 192 flow [2025-04-13 21:07:56,683 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=192, PETRI_PLACES=73, PETRI_TRANSITIONS=53} [2025-04-13 21:07:56,683 INFO L279 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2025-04-13 21:07:56,683 INFO L485 AbstractCegarLoop]: Abstraction has has 73 places, 53 transitions, 192 flow [2025-04-13 21:07:56,683 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 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 21:07:56,683 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 21:07:56,683 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 21:07:56,683 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-04-13 21:07:56,684 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 21:07:56,684 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 21:07:56,684 INFO L85 PathProgramCache]: Analyzing trace with hash 664496638, now seen corresponding path program 1 times [2025-04-13 21:07:56,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 21:07:56,684 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327555812] [2025-04-13 21:07:56,684 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:56,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 21:07:56,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 21:07:56,692 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:56,692 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:56,692 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-13 21:07:56,693 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169704462] [2025-04-13 21:07:56,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 21:07:56,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 21:07:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 21:07:56,695 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 21:07:56,696 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 21:07:56,744 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-13 21:07:56,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-13 21:07:56,752 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 21:07:56,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 21:07:56,752 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-13 21:07:56,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 21:07:56,771 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 21:07:56,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 21:07:56,802 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 21:07:56,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 21:07:56,802 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327555812] [2025-04-13 21:07:56,802 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-13 21:07:56,802 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169704462] [2025-04-13 21:07:56,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169704462] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-13 21:07:56,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-13 21:07:56,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2025-04-13 21:07:56,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011141024] [2025-04-13 21:07:56,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 21:07:56,803 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 21:07:56,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 21:07:56,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 21:07:56,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2025-04-13 21:07:56,803 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 50 [2025-04-13 21:07:56,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 53 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 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 21:07:56,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 21:07:56,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 50 [2025-04-13 21:07:56,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand