/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET -i ../../../trunk/examples/svcomp/weaver/chl-simpl-str-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:05:11,861 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:05:11,902 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-13 20:05:11,905 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:05:11,906 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:05:11,926 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:05:11,926 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:05:11,926 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:05:11,926 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:05:11,927 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:05:11,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:05:11,927 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:05:11,927 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:05:11,927 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:05:11,927 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:05:11,927 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:05:11,927 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:05:11,927 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:05:11,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:05:11,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:05:11,928 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:05:11,928 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:05:11,928 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:05:11,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:05:11,929 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET [2025-04-13 20:05:12,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:05:12,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:05:12,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:05:12,161 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:05:12,162 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:05:12,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-simpl-str-subst.wvr.c [2025-04-13 20:05:13,423 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/999ca0502/1da775ea890f4d13b65cc6dc7929927a/FLAG02bf23d2c [2025-04-13 20:05:13,640 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:05:13,641 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-simpl-str-subst.wvr.c [2025-04-13 20:05:13,653 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/999ca0502/1da775ea890f4d13b65cc6dc7929927a/FLAG02bf23d2c [2025-04-13 20:05:14,625 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/999ca0502/1da775ea890f4d13b65cc6dc7929927a [2025-04-13 20:05:14,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:05:14,628 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:05:14,629 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:05:14,629 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:05:14,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:05:14,632 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428d5b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14, skipping insertion in model container [2025-04-13 20:05:14,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,642 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:05:14,789 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-simpl-str-subst.wvr.c[2614,2627] [2025-04-13 20:05:14,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:05:14,804 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:05:14,825 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-simpl-str-subst.wvr.c[2614,2627] [2025-04-13 20:05:14,827 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:05:14,836 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:05:14,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14 WrapperNode [2025-04-13 20:05:14,836 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:05:14,837 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:05:14,837 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:05:14,837 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:05:14,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,846 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,861 INFO L138 Inliner]: procedures = 22, calls = 16, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 157 [2025-04-13 20:05:14,861 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:05:14,861 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:05:14,861 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:05:14,861 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:05:14,870 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,871 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,872 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,890 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-04-13 20:05:14,890 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,890 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,906 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,908 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,914 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:05:14,914 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:05:14,914 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:05:14,914 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:05:14,915 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (1/1) ... [2025-04-13 20:05:14,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:05:14,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:05:14,941 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-13 20:05:14,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-13 20:05:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:05:14,961 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:05:14,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:05:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:05:14,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:05:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-13 20:05:14,962 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-13 20:05:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:05:14,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:05:14,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:05:14,963 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 20:05:15,040 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:05:15,042 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:05:15,228 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:05:15,228 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:05:15,229 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:05:15,472 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:05:15,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:05:15 BoogieIcfgContainer [2025-04-13 20:05:15,472 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:05:15,474 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:05:15,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:05:15,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:05:15,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:05:14" (1/3) ... [2025-04-13 20:05:15,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62195823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:05:15, skipping insertion in model container [2025-04-13 20:05:15,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:05:14" (2/3) ... [2025-04-13 20:05:15,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62195823 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:05:15, skipping insertion in model container [2025-04-13 20:05:15,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:05:15" (3/3) ... [2025-04-13 20:05:15,481 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-simpl-str-subst.wvr.c [2025-04-13 20:05:15,492 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:05:15,494 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-simpl-str-subst.wvr.c that has 4 procedures, 19 locations, 15 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-13 20:05:15,494 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:05:15,539 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-13 20:05:15,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 18 transitions, 57 flow [2025-04-13 20:05:15,588 INFO L116 PetriNetUnfolderBase]: 0/15 cut-off events. [2025-04-13 20:05:15,590 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:05:15,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 15 events. 0/15 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 5 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2025-04-13 20:05:15,591 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 18 transitions, 57 flow [2025-04-13 20:05:15,593 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 14 transitions, 46 flow [2025-04-13 20:05:15,602 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:05:15,611 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;@43feca40, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:05:15,611 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-13 20:05:15,620 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:05:15,620 INFO L116 PetriNetUnfolderBase]: 0/13 cut-off events. [2025-04-13 20:05:15,620 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-13 20:05:15,621 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:15,622 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:05:15,622 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:15,626 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1311865488, now seen corresponding path program 1 times [2025-04-13 20:05:15,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:15,632 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396925298] [2025-04-13 20:05:15,632 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:05:15,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:15,691 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-13 20:05:15,806 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 20:05:15,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:05:15,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:05:17,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:17,005 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396925298] [2025-04-13 20:05:17,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396925298] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:17,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:17,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:17,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596578559] [2025-04-13 20:05:17,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:17,013 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:17,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:17,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:17,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:17,033 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-13 20:05:17,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 14 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:17,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:17,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-13 20:05:17,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:17,324 INFO L116 PetriNetUnfolderBase]: 32/83 cut-off events. [2025-04-13 20:05:17,324 INFO L117 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2025-04-13 20:05:17,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 83 events. 32/83 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 228 event pairs, 1 based on Foata normal form. 1/84 useless extension candidates. Maximal degree in co-relation 145. Up to 34 conditions per place. [2025-04-13 20:05:17,329 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 26 selfloop transitions, 6 changer transitions 5/37 dead transitions. [2025-04-13 20:05:17,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 37 transitions, 196 flow [2025-04-13 20:05:17,329 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:05:17,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:05:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 56 transitions. [2025-04-13 20:05:17,339 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2025-04-13 20:05:17,340 INFO L175 Difference]: Start difference. First operand has 24 places, 14 transitions, 46 flow. Second operand 6 states and 56 transitions. [2025-04-13 20:05:17,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 37 transitions, 196 flow [2025-04-13 20:05:17,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 37 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-13 20:05:17,350 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 67 flow [2025-04-13 20:05:17,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=67, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2025-04-13 20:05:17,354 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2025-04-13 20:05:17,354 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 67 flow [2025-04-13 20:05:17,354 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:17,354 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:17,354 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:05:17,354 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:05:17,354 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:17,355 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash 436979452, now seen corresponding path program 2 times [2025-04-13 20:05:17,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:17,355 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662612329] [2025-04-13 20:05:17,355 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:05:17,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:17,367 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 1 equivalence classes. [2025-04-13 20:05:17,396 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 20:05:17,396 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:05:17,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:05:18,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:18,158 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662612329] [2025-04-13 20:05:18,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662612329] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:18,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:18,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:18,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208568962] [2025-04-13 20:05:18,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:18,159 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:18,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:18,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:18,159 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-13 20:05:18,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 18 transitions, 67 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:18,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:18,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-13 20:05:18,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:18,335 INFO L116 PetriNetUnfolderBase]: 31/94 cut-off events. [2025-04-13 20:05:18,335 INFO L117 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2025-04-13 20:05:18,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 94 events. 31/94 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 315 event pairs, 3 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 256. Up to 46 conditions per place. [2025-04-13 20:05:18,336 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 26 selfloop transitions, 7 changer transitions 7/40 dead transitions. [2025-04-13 20:05:18,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 40 transitions, 211 flow [2025-04-13 20:05:18,337 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:05:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:05:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 58 transitions. [2025-04-13 20:05:18,338 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2025-04-13 20:05:18,338 INFO L175 Difference]: Start difference. First operand has 26 places, 18 transitions, 67 flow. Second operand 6 states and 58 transitions. [2025-04-13 20:05:18,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 40 transitions, 211 flow [2025-04-13 20:05:18,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 40 transitions, 207 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-04-13 20:05:18,339 INFO L231 Difference]: Finished difference. Result has 32 places, 19 transitions, 96 flow [2025-04-13 20:05:18,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=96, PETRI_PLACES=32, PETRI_TRANSITIONS=19} [2025-04-13 20:05:18,340 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 8 predicate places. [2025-04-13 20:05:18,340 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 19 transitions, 96 flow [2025-04-13 20:05:18,340 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:18,340 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:18,340 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:05:18,340 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:05:18,340 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:18,341 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:18,341 INFO L85 PathProgramCache]: Analyzing trace with hash 465348172, now seen corresponding path program 3 times [2025-04-13 20:05:18,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:18,341 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880570185] [2025-04-13 20:05:18,341 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:05:18,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:18,355 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 1 equivalence classes. [2025-04-13 20:05:18,383 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 20:05:18,383 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:05:18,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:19,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:05:19,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:19,004 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880570185] [2025-04-13 20:05:19,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880570185] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:19,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:19,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:19,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710345386] [2025-04-13 20:05:19,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:19,005 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:19,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:19,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:19,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:19,005 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-13 20:05:19,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 19 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:19,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:19,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-13 20:05:19,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:19,219 INFO L116 PetriNetUnfolderBase]: 28/85 cut-off events. [2025-04-13 20:05:19,220 INFO L117 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2025-04-13 20:05:19,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 85 events. 28/85 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 270 event pairs, 1 based on Foata normal form. 1/86 useless extension candidates. Maximal degree in co-relation 284. Up to 42 conditions per place. [2025-04-13 20:05:19,221 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 23 selfloop transitions, 6 changer transitions 9/38 dead transitions. [2025-04-13 20:05:19,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 233 flow [2025-04-13 20:05:19,221 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:05:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:05:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 56 transitions. [2025-04-13 20:05:19,222 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2025-04-13 20:05:19,222 INFO L175 Difference]: Start difference. First operand has 32 places, 19 transitions, 96 flow. Second operand 6 states and 56 transitions. [2025-04-13 20:05:19,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 233 flow [2025-04-13 20:05:19,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 38 transitions, 219 flow, removed 5 selfloop flow, removed 2 redundant places. [2025-04-13 20:05:19,224 INFO L231 Difference]: Finished difference. Result has 36 places, 18 transitions, 96 flow [2025-04-13 20:05:19,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=96, PETRI_PLACES=36, PETRI_TRANSITIONS=18} [2025-04-13 20:05:19,225 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 12 predicate places. [2025-04-13 20:05:19,225 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 18 transitions, 96 flow [2025-04-13 20:05:19,225 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:19,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:19,225 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:05:19,225 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-13 20:05:19,225 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:19,227 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:19,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1295853982, now seen corresponding path program 4 times [2025-04-13 20:05:19,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:19,227 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145739435] [2025-04-13 20:05:19,228 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 20:05:19,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:19,237 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 14 statements into 2 equivalence classes. [2025-04-13 20:05:19,251 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 20:05:19,251 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 20:05:19,252 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:05:19,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:19,705 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145739435] [2025-04-13 20:05:19,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145739435] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:19,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:19,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:19,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263733749] [2025-04-13 20:05:19,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:19,705 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:19,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:19,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:19,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:19,706 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-13 20:05:19,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 18 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:19,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:19,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-13 20:05:19,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:19,930 INFO L116 PetriNetUnfolderBase]: 15/50 cut-off events. [2025-04-13 20:05:19,930 INFO L117 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2025-04-13 20:05:19,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 50 events. 15/50 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 112 event pairs, 0 based on Foata normal form. 1/51 useless extension candidates. Maximal degree in co-relation 179. Up to 16 conditions per place. [2025-04-13 20:05:19,931 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 16 selfloop transitions, 5 changer transitions 10/31 dead transitions. [2025-04-13 20:05:19,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 31 transitions, 199 flow [2025-04-13 20:05:19,933 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:05:19,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:05:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 49 transitions. [2025-04-13 20:05:19,934 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4537037037037037 [2025-04-13 20:05:19,934 INFO L175 Difference]: Start difference. First operand has 36 places, 18 transitions, 96 flow. Second operand 6 states and 49 transitions. [2025-04-13 20:05:19,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 31 transitions, 199 flow [2025-04-13 20:05:19,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 31 transitions, 182 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-04-13 20:05:19,936 INFO L231 Difference]: Finished difference. Result has 35 places, 16 transitions, 77 flow [2025-04-13 20:05:19,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=16} [2025-04-13 20:05:19,937 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 11 predicate places. [2025-04-13 20:05:19,937 INFO L485 AbstractCegarLoop]: Abstraction has has 35 places, 16 transitions, 77 flow [2025-04-13 20:05:19,937 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:19,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:19,937 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:05:19,937 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-13 20:05:19,939 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:19,940 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1344778492, now seen corresponding path program 5 times [2025-04-13 20:05:19,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:19,940 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204927113] [2025-04-13 20:05:19,940 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-13 20:05:19,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:19,948 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 14 statements into 1 equivalence classes. [2025-04-13 20:05:19,961 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 20:05:19,961 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:05:19,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:20,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:05:20,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:20,546 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204927113] [2025-04-13 20:05:20,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204927113] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:20,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:20,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:20,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34564619] [2025-04-13 20:05:20,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:20,546 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:20,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:20,547 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:20,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:20,547 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-13 20:05:20,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 16 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:20,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:20,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-13 20:05:20,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:20,782 INFO L116 PetriNetUnfolderBase]: 8/36 cut-off events. [2025-04-13 20:05:20,782 INFO L117 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2025-04-13 20:05:20,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 36 events. 8/36 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 1/37 useless extension candidates. Maximal degree in co-relation 126. Up to 17 conditions per place. [2025-04-13 20:05:20,783 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 13 selfloop transitions, 3 changer transitions 10/26 dead transitions. [2025-04-13 20:05:20,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 26 transitions, 162 flow [2025-04-13 20:05:20,783 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:05:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:05:20,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 45 transitions. [2025-04-13 20:05:20,783 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-04-13 20:05:20,783 INFO L175 Difference]: Start difference. First operand has 35 places, 16 transitions, 77 flow. Second operand 6 states and 45 transitions. [2025-04-13 20:05:20,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 26 transitions, 162 flow [2025-04-13 20:05:20,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 128 flow, removed 4 selfloop flow, removed 9 redundant places. [2025-04-13 20:05:20,786 INFO L231 Difference]: Finished difference. Result has 31 places, 14 transitions, 52 flow [2025-04-13 20:05:20,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=52, PETRI_PLACES=31, PETRI_TRANSITIONS=14} [2025-04-13 20:05:20,787 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 7 predicate places. [2025-04-13 20:05:20,787 INFO L485 AbstractCegarLoop]: Abstraction has has 31 places, 14 transitions, 52 flow [2025-04-13 20:05:20,787 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:20,787 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:05:20,787 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:05:20,787 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-13 20:05:20,787 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-13 20:05:20,787 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:05:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2091314274, now seen corresponding path program 6 times [2025-04-13 20:05:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:05:20,788 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467935058] [2025-04-13 20:05:20,788 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-13 20:05:20,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:05:20,796 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 14 statements into 1 equivalence classes. [2025-04-13 20:05:20,809 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-13 20:05:20,810 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-04-13 20:05:20,810 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:05:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 20:05:21,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:05:21,202 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467935058] [2025-04-13 20:05:21,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467935058] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:05:21,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:05:21,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:05:21,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101933424] [2025-04-13 20:05:21,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:05:21,203 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-13 20:05:21,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:05:21,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-13 20:05:21,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-13 20:05:21,203 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-13 20:05:21,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 14 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:21,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:05:21,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-13 20:05:21,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:05:21,351 INFO L116 PetriNetUnfolderBase]: 3/19 cut-off events. [2025-04-13 20:05:21,351 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-13 20:05:21,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 19 events. 3/19 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 1/20 useless extension candidates. Maximal degree in co-relation 58. Up to 7 conditions per place. [2025-04-13 20:05:21,351 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2025-04-13 20:05:21,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 16 transitions, 86 flow [2025-04-13 20:05:21,353 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 20:05:21,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 20:05:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 35 transitions. [2025-04-13 20:05:21,353 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.32407407407407407 [2025-04-13 20:05:21,354 INFO L175 Difference]: Start difference. First operand has 31 places, 14 transitions, 52 flow. Second operand 6 states and 35 transitions. [2025-04-13 20:05:21,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 16 transitions, 86 flow [2025-04-13 20:05:21,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 16 transitions, 74 flow, removed 1 selfloop flow, removed 6 redundant places. [2025-04-13 20:05:21,354 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2025-04-13 20:05:21,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2025-04-13 20:05:21,355 INFO L279 CegarLoopForPetriNet]: 24 programPoint places, 3 predicate places. [2025-04-13 20:05:21,355 INFO L485 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2025-04-13 20:05:21,355 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:05:21,358 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-04-13 20:05:21,358 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-13 20:05:21,358 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-13 20:05:21,358 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-04-13 20:05:21,358 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-13 20:05:21,358 INFO L422 BasicCegarLoop]: Path program histogram: [6] [2025-04-13 20:05:21,360 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-13 20:05:21,360 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-13 20:05:21,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.04 08:05:21 BasicIcfg [2025-04-13 20:05:21,365 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-13 20:05:21,365 INFO L158 Benchmark]: Toolchain (without parser) took 6736.95ms. Allocated memory was 155.2MB in the beginning and 427.8MB in the end (delta: 272.6MB). Free memory was 110.6MB in the beginning and 172.0MB in the end (delta: -61.5MB). Peak memory consumption was 211.0MB. Max. memory is 8.0GB. [2025-04-13 20:05:21,366 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory was 86.5MB in the beginning and 86.4MB in the end (delta: 104.9kB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:05:21,366 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.22ms. Allocated memory is still 155.2MB. Free memory was 110.6MB in the beginning and 95.8MB in the end (delta: 14.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2025-04-13 20:05:21,367 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.08ms. Allocated memory is still 155.2MB. Free memory was 95.8MB in the beginning and 93.6MB in the end (delta: 2.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-13 20:05:21,368 INFO L158 Benchmark]: Boogie Preprocessor took 52.37ms. Allocated memory is still 155.2MB. Free memory was 93.6MB in the beginning and 92.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-13 20:05:21,368 INFO L158 Benchmark]: RCFGBuilder took 558.25ms. Allocated memory is still 155.2MB. Free memory was 91.6MB in the beginning and 99.0MB in the end (delta: -7.5MB). Peak memory consumption was 74.0MB. Max. memory is 8.0GB. [2025-04-13 20:05:21,368 INFO L158 Benchmark]: TraceAbstraction took 5891.01ms. Allocated memory was 155.2MB in the beginning and 427.8MB in the end (delta: 272.6MB). Free memory was 98.3MB in the beginning and 172.0MB in the end (delta: -73.7MB). Peak memory consumption was 199.9MB. Max. memory is 8.0GB. [2025-04-13 20:05:21,369 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 159.4MB. Free memory was 86.5MB in the beginning and 86.4MB in the end (delta: 104.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.22ms. Allocated memory is still 155.2MB. Free memory was 110.6MB in the beginning and 95.8MB in the end (delta: 14.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.08ms. Allocated memory is still 155.2MB. Free memory was 95.8MB in the beginning and 93.6MB in the end (delta: 2.2MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 52.37ms. Allocated memory is still 155.2MB. Free memory was 93.6MB in the beginning and 92.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 558.25ms. Allocated memory is still 155.2MB. Free memory was 91.6MB in the beginning and 99.0MB in the end (delta: -7.5MB). Peak memory consumption was 74.0MB. Max. memory is 8.0GB. * TraceAbstraction took 5891.01ms. Allocated memory was 155.2MB in the beginning and 427.8MB in the end (delta: 272.6MB). Free memory was 98.3MB in the beginning and 172.0MB in the end (delta: -73.7MB). Peak memory consumption was 199.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 81]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 28 locations, 27 edges, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.8s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 146 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 146 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 380 IncrementalHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 0 mSDtfsCounter, 380 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=2, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 2051 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2025-04-13 20:05:21,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...