/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_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/pthread-wmm/safe036.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 00:10:56,718 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 00:10:56,768 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 [2025-04-14 00:10:56,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 00:10:56,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 00:10:56,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 00:10:56,785 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 00:10:56,785 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 00:10:56,785 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 00:10:56,785 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 00:10:56,786 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 00:10:56,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 00:10:56,786 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 00:10:56,786 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 00:10:56,786 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 00:10:56,787 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 00:10:56,787 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 00:10:56,787 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 00:10:56,787 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 00:10:56,787 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 00:10:56,788 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:10:56,788 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:10:56,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:10:56,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 00:10:56,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 00:10:56,789 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 00:10:56,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 00:10:56,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 00:10:56,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 00:10:56,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 00:10:56,789 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 00:10:56,789 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 00:10:56,789 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-14 00:10:57,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 00:10:57,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 00:10:57,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 00:10:57,029 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 00:10:57,030 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 00:10:57,030 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe036.i [2025-04-14 00:10:58,378 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a80e6d90a/b58a1695b8e041379cf532efc9d8c88e/FLAGef7ce867e [2025-04-14 00:10:58,630 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 00:10:58,630 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe036.i [2025-04-14 00:10:58,644 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a80e6d90a/b58a1695b8e041379cf532efc9d8c88e/FLAGef7ce867e [2025-04-14 00:10:59,428 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a80e6d90a/b58a1695b8e041379cf532efc9d8c88e [2025-04-14 00:10:59,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 00:10:59,431 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 00:10:59,432 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 00:10:59,432 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 00:10:59,437 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 00:10:59,438 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,438 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e1559b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59, skipping insertion in model container [2025-04-14 00:10:59,438 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,462 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 00:10:59,621 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-wmm/safe036.i[941,954] [2025-04-14 00:10:59,756 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:10:59,766 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 00:10:59,788 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-wmm/safe036.i[941,954] [2025-04-14 00:10:59,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:10:59,844 INFO L204 MainTranslator]: Completed translation [2025-04-14 00:10:59,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59 WrapperNode [2025-04-14 00:10:59,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 00:10:59,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 00:10:59,847 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 00:10:59,847 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 00:10:59,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,863 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,880 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 50 [2025-04-14 00:10:59,880 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 00:10:59,881 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 00:10:59,881 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 00:10:59,881 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 00:10:59,886 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,891 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,906 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]. [2025-04-14 00:10:59,906 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,906 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,909 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,909 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,910 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,911 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,914 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 00:10:59,915 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 00:10:59,915 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 00:10:59,915 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 00:10:59,916 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (1/1) ... [2025-04-14 00:10:59,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:10:59,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:10:59,948 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) [2025-04-14 00:10:59,954 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 [2025-04-14 00:10:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-14 00:10:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 00:10:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2025-04-14 00:10:59,972 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2025-04-14 00:10:59,972 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2025-04-14 00:10:59,973 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2025-04-14 00:10:59,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 00:10:59,973 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-14 00:10:59,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 00:10:59,973 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 00:10:59,974 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-14 00:11:00,077 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 00:11:00,079 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 00:11:00,220 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 00:11:00,221 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 00:11:00,221 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 00:11:00,322 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 00:11:00,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:11:00 BoogieIcfgContainer [2025-04-14 00:11:00,323 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 00:11:00,325 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 00:11:00,325 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 00:11:00,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 00:11:00,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 12:10:59" (1/3) ... [2025-04-14 00:11:00,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2605dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:11:00, skipping insertion in model container [2025-04-14 00:11:00,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:10:59" (2/3) ... [2025-04-14 00:11:00,330 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a2605dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:11:00, skipping insertion in model container [2025-04-14 00:11:00,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:11:00" (3/3) ... [2025-04-14 00:11:00,331 INFO L128 eAbstractionObserver]: Analyzing ICFG safe036.i [2025-04-14 00:11:00,341 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 00:11:00,344 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG safe036.i that has 3 procedures, 28 locations, 25 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-14 00:11:00,344 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 00:11:00,379 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-14 00:11:00,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 27 transitions, 62 flow [2025-04-14 00:11:00,437 INFO L116 PetriNetUnfolderBase]: 0/25 cut-off events. [2025-04-14 00:11:00,440 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-14 00:11:00,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 25 events. 0/25 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 39 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2025-04-14 00:11:00,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 27 transitions, 62 flow [2025-04-14 00:11:00,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 31 places, 24 transitions, 54 flow [2025-04-14 00:11:00,451 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 00:11:00,461 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;@750af7f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 00:11:00,461 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 00:11:00,470 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 00:11:00,470 INFO L116 PetriNetUnfolderBase]: 0/21 cut-off events. [2025-04-14 00:11:00,470 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-14 00:11:00,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:11:00,471 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:11:00,471 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:11:00,476 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:11:00,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1202128238, now seen corresponding path program 1 times [2025-04-14 00:11:00,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:11:00,482 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38888329] [2025-04-14 00:11:00,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:11:00,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:11:00,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-14 00:11:00,572 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-14 00:11:00,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:11:00,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:11:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:11:00,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:11:00,856 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38888329] [2025-04-14 00:11:00,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38888329] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:11:00,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:11:00,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 00:11:00,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906591924] [2025-04-14 00:11:00,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:11:00,862 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 00:11:00,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:11:00,880 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 00:11:00,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 00:11:00,882 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-04-14 00:11:00,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 54 flow. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2025-04-14 00:11:00,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:11:00,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-04-14 00:11:00,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:11:01,115 INFO L116 PetriNetUnfolderBase]: 362/647 cut-off events. [2025-04-14 00:11:01,116 INFO L117 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-04-14 00:11:01,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 647 events. 362/647 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2676 event pairs, 110 based on Foata normal form. 49/695 useless extension candidates. Maximal degree in co-relation 1301. Up to 291 conditions per place. [2025-04-14 00:11:01,125 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 43 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2025-04-14 00:11:01,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 50 transitions, 205 flow [2025-04-14 00:11:01,127 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 00:11:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 00:11:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2025-04-14 00:11:01,136 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2025-04-14 00:11:01,138 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 54 flow. Second operand 4 states and 66 transitions. [2025-04-14 00:11:01,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 50 transitions, 205 flow [2025-04-14 00:11:01,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 50 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-14 00:11:01,144 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 78 flow [2025-04-14 00:11:01,146 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=78, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2025-04-14 00:11:01,149 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2025-04-14 00:11:01,149 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 78 flow [2025-04-14 00:11:01,149 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2025-04-14 00:11:01,149 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:11:01,150 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:11:01,150 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 00:11:01,150 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:11:01,151 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:11:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1492432429, now seen corresponding path program 1 times [2025-04-14 00:11:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:11:01,151 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483276626] [2025-04-14 00:11:01,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:11:01,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:11:01,159 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:11:01,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:11:01,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:11:01,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:11:01,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:11:01,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:11:01,331 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483276626] [2025-04-14 00:11:01,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483276626] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:11:01,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:11:01,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 00:11:01,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797448296] [2025-04-14 00:11:01,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:11:01,332 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:11:01,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:11:01,332 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:11:01,332 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-14 00:11:01,332 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-04-14 00:11:01,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2025-04-14 00:11:01,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:11:01,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-04-14 00:11:01,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:11:01,448 INFO L116 PetriNetUnfolderBase]: 182/342 cut-off events. [2025-04-14 00:11:01,448 INFO L117 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2025-04-14 00:11:01,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 342 events. 182/342 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1149 event pairs, 74 based on Foata normal form. 24/365 useless extension candidates. Maximal degree in co-relation 803. Up to 146 conditions per place. [2025-04-14 00:11:01,451 INFO L140 encePairwiseOnDemand]: 22/27 looper letters, 34 selfloop transitions, 6 changer transitions 1/43 dead transitions. [2025-04-14 00:11:01,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 199 flow [2025-04-14 00:11:01,451 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:11:01,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:11:01,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 63 transitions. [2025-04-14 00:11:01,452 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-04-14 00:11:01,452 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 78 flow. Second operand 5 states and 63 transitions. [2025-04-14 00:11:01,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 199 flow [2025-04-14 00:11:01,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 43 transitions, 190 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-14 00:11:01,454 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 94 flow [2025-04-14 00:11:01,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2025-04-14 00:11:01,454 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2025-04-14 00:11:01,454 INFO L485 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 94 flow [2025-04-14 00:11:01,455 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 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) [2025-04-14 00:11:01,455 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:11:01,455 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:11:01,455 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 00:11:01,455 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:11:01,455 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:11:01,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2103500492, now seen corresponding path program 1 times [2025-04-14 00:11:01,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:11:01,455 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076221941] [2025-04-14 00:11:01,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:11:01,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:11:01,461 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-04-14 00:11:01,483 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 00:11:01,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:11:01,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:11:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:11:01,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:11:01,649 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076221941] [2025-04-14 00:11:01,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076221941] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:11:01,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:11:01,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 00:11:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477091869] [2025-04-14 00:11:01,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:11:01,649 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:11:01,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:11:01,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:11:01,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-14 00:11:01,650 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-04-14 00:11:01,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:11:01,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:11:01,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-04-14 00:11:01,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:11:01,835 INFO L116 PetriNetUnfolderBase]: 220/420 cut-off events. [2025-04-14 00:11:01,835 INFO L117 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2025-04-14 00:11:01,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 420 events. 220/420 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1531 event pairs, 34 based on Foata normal form. 4/423 useless extension candidates. Maximal degree in co-relation 1037. Up to 226 conditions per place. [2025-04-14 00:11:01,840 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 27 selfloop transitions, 1 changer transitions 20/50 dead transitions. [2025-04-14 00:11:01,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 278 flow [2025-04-14 00:11:01,840 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:11:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:11:01,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 65 transitions. [2025-04-14 00:11:01,841 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2025-04-14 00:11:01,841 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 94 flow. Second operand 5 states and 65 transitions. [2025-04-14 00:11:01,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 278 flow [2025-04-14 00:11:01,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 221 flow, removed 10 selfloop flow, removed 6 redundant places. [2025-04-14 00:11:01,843 INFO L231 Difference]: Finished difference. Result has 39 places, 26 transitions, 75 flow [2025-04-14 00:11:01,843 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=39, PETRI_TRANSITIONS=26} [2025-04-14 00:11:01,844 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 8 predicate places. [2025-04-14 00:11:01,844 INFO L485 AbstractCegarLoop]: Abstraction has has 39 places, 26 transitions, 75 flow [2025-04-14 00:11:01,844 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:11:01,844 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:11:01,844 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:11:01,844 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-14 00:11:01,844 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:11:01,852 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:11:01,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1734051824, now seen corresponding path program 2 times [2025-04-14 00:11:01,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:11:01,852 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236657989] [2025-04-14 00:11:01,852 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:11:01,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:11:01,861 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 1 equivalence classes. [2025-04-14 00:11:01,865 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-04-14 00:11:01,865 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-14 00:11:01,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:11:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:11:01,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:11:01,982 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236657989] [2025-04-14 00:11:01,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236657989] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:11:01,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:11:01,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 00:11:01,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159953012] [2025-04-14 00:11:01,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:11:01,982 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:11:01,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:11:01,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:11:01,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-04-14 00:11:01,983 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 27 [2025-04-14 00:11:01,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 26 transitions, 75 flow. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:11:01,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:11:01,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 27 [2025-04-14 00:11:01,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:11:02,121 INFO L116 PetriNetUnfolderBase]: 148/295 cut-off events. [2025-04-14 00:11:02,121 INFO L117 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2025-04-14 00:11:02,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 295 events. 148/295 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1010 event pairs, 24 based on Foata normal form. 4/298 useless extension candidates. Maximal degree in co-relation 661. Up to 134 conditions per place. [2025-04-14 00:11:02,122 INFO L140 encePairwiseOnDemand]: 23/27 looper letters, 0 selfloop transitions, 0 changer transitions 44/44 dead transitions. [2025-04-14 00:11:02,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 44 transitions, 204 flow [2025-04-14 00:11:02,123 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:11:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:11:02,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2025-04-14 00:11:02,124 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45185185185185184 [2025-04-14 00:11:02,124 INFO L175 Difference]: Start difference. First operand has 39 places, 26 transitions, 75 flow. Second operand 5 states and 61 transitions. [2025-04-14 00:11:02,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 44 transitions, 204 flow [2025-04-14 00:11:02,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 200 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-14 00:11:02,125 INFO L231 Difference]: Finished difference. Result has 38 places, 0 transitions, 0 flow [2025-04-14 00:11:02,125 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=27, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=38, PETRI_TRANSITIONS=0} [2025-04-14 00:11:02,125 INFO L279 CegarLoopForPetriNet]: 31 programPoint places, 7 predicate places. [2025-04-14 00:11:02,125 INFO L485 AbstractCegarLoop]: Abstraction has has 38 places, 0 transitions, 0 flow [2025-04-14 00:11:02,126 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:11:02,128 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-14 00:11:02,129 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-14 00:11:02,129 INFO L790 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-14 00:11:02,129 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-14 00:11:02,129 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2025-04-14 00:11:02,132 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 00:11:02,132 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 00:11:02,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 12:11:02 BasicIcfg [2025-04-14 00:11:02,135 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 00:11:02,135 INFO L158 Benchmark]: Toolchain (without parser) took 2704.06ms. Allocated memory is still 142.6MB. Free memory was 97.3MB in the beginning and 101.2MB in the end (delta: -3.8MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 00:11:02,135 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 159.4MB. Free memory is still 87.0MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 00:11:02,136 INFO L158 Benchmark]: CACSL2BoogieTranslator took 414.41ms. Allocated memory is still 142.6MB. Free memory was 96.8MB in the beginning and 74.0MB in the end (delta: 22.8MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-14 00:11:02,136 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.26ms. Allocated memory is still 142.6MB. Free memory was 74.0MB in the beginning and 71.8MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 00:11:02,136 INFO L158 Benchmark]: Boogie Preprocessor took 33.32ms. Allocated memory is still 142.6MB. Free memory was 71.8MB in the beginning and 70.3MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-14 00:11:02,136 INFO L158 Benchmark]: IcfgBuilder took 407.91ms. Allocated memory is still 142.6MB. Free memory was 70.3MB in the beginning and 48.8MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. [2025-04-14 00:11:02,136 INFO L158 Benchmark]: TraceAbstraction took 1810.20ms. Allocated memory is still 142.6MB. Free memory was 48.3MB in the beginning and 101.2MB in the end (delta: -52.9MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 00:11:02,137 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 159.4MB. Free memory is still 87.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 414.41ms. Allocated memory is still 142.6MB. Free memory was 96.8MB in the beginning and 74.0MB in the end (delta: 22.8MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.26ms. Allocated memory is still 142.6MB. Free memory was 74.0MB in the beginning and 71.8MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Preprocessor took 33.32ms. Allocated memory is still 142.6MB. Free memory was 71.8MB in the beginning and 70.3MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * IcfgBuilder took 407.91ms. Allocated memory is still 142.6MB. Free memory was 70.3MB in the beginning and 48.8MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1810.20ms. Allocated memory is still 142.6MB. Free memory was 48.3MB in the beginning and 101.2MB in the end (delta: -52.9MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 18]: 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 5 procedures, 46 locations, 43 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 127 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 355 IncrementalHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 0 mSDtfsCounter, 355 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=2, InterpolantAutomatonStates: 19, 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, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 70 NumberOfCodeBlocks, 70 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 66 ConstructedInterpolants, 0 QuantifiedInterpolants, 232 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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! [2025-04-14 00:11:02,155 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...