/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/parallel-bakery-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 20:13:13,725 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 20:13:13,769 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 20:13:13,772 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 20:13:13,773 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 20:13:13,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 20:13:13,787 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 20:13:13,787 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 20:13:13,787 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 20:13:13,787 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 20:13:13,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 20:13:13,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 20:13:13,788 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 20:13:13,788 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 20:13:13,788 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 20:13:13,789 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:13:13,789 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:13:13,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 20:13:13,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 20:13:13,790 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 20:13:13,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 20:13:13,790 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 20:13:13,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 20:13:13,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 20:13:13,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 20:13:13,990 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 20:13:13,990 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 20:13:13,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-bakery-4.wvr.c [2025-04-13 20:13:15,264 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75159b4a0/29fcc699a50e4f0d99c5d49b3c30e1d3/FLAG077a8aed7 [2025-04-13 20:13:15,485 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 20:13:15,485 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-bakery-4.wvr.c [2025-04-13 20:13:15,497 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75159b4a0/29fcc699a50e4f0d99c5d49b3c30e1d3/FLAG077a8aed7 [2025-04-13 20:13:16,314 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75159b4a0/29fcc699a50e4f0d99c5d49b3c30e1d3 [2025-04-13 20:13:16,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 20:13:16,317 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 20:13:16,318 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 20:13:16,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 20:13:16,321 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 20:13:16,321 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,322 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@580a1487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16, skipping insertion in model container [2025-04-13 20:13:16,322 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,335 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 20:13:16,485 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/parallel-bakery-4.wvr.c[5088,5101] [2025-04-13 20:13:16,488 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:13:16,495 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 20:13:16,537 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/parallel-bakery-4.wvr.c[5088,5101] [2025-04-13 20:13:16,538 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 20:13:16,547 INFO L204 MainTranslator]: Completed translation [2025-04-13 20:13:16,547 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16 WrapperNode [2025-04-13 20:13:16,547 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 20:13:16,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 20:13:16,548 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 20:13:16,548 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 20:13:16,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,565 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,596 INFO L138 Inliner]: procedures = 20, calls = 36, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 365 [2025-04-13 20:13:16,596 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 20:13:16,601 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 20:13:16,601 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 20:13:16,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 20:13:16,612 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,615 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,629 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 20:13:16,629 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,634 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,635 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,637 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,638 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 20:13:16,648 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-13 20:13:16,649 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-13 20:13:16,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-13 20:13:16,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (1/1) ... [2025-04-13 20:13:16,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 20:13:16,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 20:13:16,675 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 20:13:16,677 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 20:13:16,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 20:13:16,691 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-13 20:13:16,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-13 20:13:16,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-13 20:13:16,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-13 20:13:16,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-13 20:13:16,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-13 20:13:16,692 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-04-13 20:13:16,692 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-04-13 20:13:16,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 20:13:16,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 20:13:16,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 20:13:16,693 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 20:13:16,760 INFO L234 CfgBuilder]: Building ICFG [2025-04-13 20:13:16,762 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 20:13:17,167 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 20:13:17,167 INFO L289 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 20:13:17,167 INFO L294 CfgBuilder]: Performing block encoding [2025-04-13 20:13:17,439 INFO L313 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 20:13:17,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:13:17 BoogieIcfgContainer [2025-04-13 20:13:17,440 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-13 20:13:17,442 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 20:13:17,442 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 20:13:17,446 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 20:13:17,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 08:13:16" (1/3) ... [2025-04-13 20:13:17,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478a3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:13:17, skipping insertion in model container [2025-04-13 20:13:17,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 08:13:16" (2/3) ... [2025-04-13 20:13:17,446 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478a3e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 08:13:17, skipping insertion in model container [2025-04-13 20:13:17,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.04 08:13:17" (3/3) ... [2025-04-13 20:13:17,447 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-bakery-4.wvr.c [2025-04-13 20:13:17,459 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 20:13:17,460 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-bakery-4.wvr.c that has 5 procedures, 110 locations, 117 edges, 1 initial locations, 0 loop locations, and 1 error locations. [2025-04-13 20:13:17,460 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 20:13:17,524 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-04-13 20:13:17,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 121 transitions, 270 flow [2025-04-13 20:13:17,602 INFO L116 PetriNetUnfolderBase]: 12/117 cut-off events. [2025-04-13 20:13:17,606 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-13 20:13:17,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 117 events. 12/117 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 242 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 96. Up to 2 conditions per place. [2025-04-13 20:13:17,611 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 121 transitions, 270 flow [2025-04-13 20:13:17,614 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 116 transitions, 256 flow [2025-04-13 20:13:17,622 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 20:13:17,632 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;@29e9efc2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 20:13:17,632 INFO L341 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2025-04-13 20:13:17,693 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 20:13:17,693 INFO L116 PetriNetUnfolderBase]: 12/115 cut-off events. [2025-04-13 20:13:17,693 INFO L117 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-04-13 20:13:17,693 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:17,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:17,694 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 2 more)] === [2025-04-13 20:13:17,699 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:17,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1264693668, now seen corresponding path program 1 times [2025-04-13 20:13:17,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:17,704 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262128437] [2025-04-13 20:13:17,705 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 20:13:17,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:17,777 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 92 statements into 1 equivalence classes. [2025-04-13 20:13:17,870 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-04-13 20:13:17,871 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 20:13:17,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:18,442 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 20:13:18,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:18,443 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262128437] [2025-04-13 20:13:18,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262128437] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:13:18,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:13:18,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-04-13 20:13:18,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829652094] [2025-04-13 20:13:18,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:13:18,451 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-13 20:13:18,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:18,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-13 20:13:18,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2025-04-13 20:13:18,558 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 121 [2025-04-13 20:13:18,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 116 transitions, 256 flow. Second operand has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:18,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:18,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 121 [2025-04-13 20:13:18,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:13:37,043 INFO L116 PetriNetUnfolderBase]: 242754/350193 cut-off events. [2025-04-13 20:13:37,044 INFO L117 PetriNetUnfolderBase]: For 10122/10122 co-relation queries the response was YES. [2025-04-13 20:13:37,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 673300 conditions, 350193 events. 242754/350193 cut-off events. For 10122/10122 co-relation queries the response was YES. Maximal size of possible extension queue 7281. Compared 2902337 event pairs, 97473 based on Foata normal form. 1/283939 useless extension candidates. Maximal degree in co-relation 640602. Up to 119592 conditions per place. [2025-04-13 20:13:39,085 INFO L140 encePairwiseOnDemand]: 108/121 looper letters, 377 selfloop transitions, 28 changer transitions 21/462 dead transitions. [2025-04-13 20:13:39,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 462 transitions, 1929 flow [2025-04-13 20:13:39,086 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-13 20:13:39,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-13 20:13:39,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 987 transitions. [2025-04-13 20:13:39,098 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5826446280991735 [2025-04-13 20:13:39,099 INFO L175 Difference]: Start difference. First operand has 117 places, 116 transitions, 256 flow. Second operand 14 states and 987 transitions. [2025-04-13 20:13:39,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 462 transitions, 1929 flow [2025-04-13 20:13:41,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 462 transitions, 1827 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-04-13 20:13:41,661 INFO L231 Difference]: Finished difference. Result has 127 places, 145 transitions, 401 flow [2025-04-13 20:13:41,662 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=401, PETRI_PLACES=127, PETRI_TRANSITIONS=145} [2025-04-13 20:13:41,664 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 10 predicate places. [2025-04-13 20:13:41,665 INFO L485 AbstractCegarLoop]: Abstraction has has 127 places, 145 transitions, 401 flow [2025-04-13 20:13:41,665 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.18181818181818) internal successors, (508), 11 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:41,665 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:13:41,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:13:41,665 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 20:13:41,665 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 2 more)] === [2025-04-13 20:13:41,666 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:13:41,666 INFO L85 PathProgramCache]: Analyzing trace with hash 371618278, now seen corresponding path program 2 times [2025-04-13 20:13:41,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:13:41,666 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064243626] [2025-04-13 20:13:41,666 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 20:13:41,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:13:41,678 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 92 statements into 1 equivalence classes. [2025-04-13 20:13:41,705 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-04-13 20:13:41,705 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-13 20:13:41,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:13:41,878 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 20:13:41,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:13:41,878 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064243626] [2025-04-13 20:13:41,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064243626] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:13:41,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:13:41,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:13:41,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953362911] [2025-04-13 20:13:41,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:13:41,879 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:13:41,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:13:41,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:13:41,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:13:41,898 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 121 [2025-04-13 20:13:41,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 145 transitions, 401 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:13:41,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:13:41,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 121 [2025-04-13 20:13:41,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 20:14:01,753 INFO L116 PetriNetUnfolderBase]: 273711/398413 cut-off events. [2025-04-13 20:14:01,753 INFO L117 PetriNetUnfolderBase]: For 2791/2949 co-relation queries the response was YES. [2025-04-13 20:14:02,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784836 conditions, 398413 events. 273711/398413 cut-off events. For 2791/2949 co-relation queries the response was YES. Maximal size of possible extension queue 9223. Compared 3456451 event pairs, 57759 based on Foata normal form. 0/318512 useless extension candidates. Maximal degree in co-relation 784807. Up to 231487 conditions per place. [2025-04-13 20:14:04,093 INFO L140 encePairwiseOnDemand]: 104/121 looper letters, 161 selfloop transitions, 24 changer transitions 0/253 dead transitions. [2025-04-13 20:14:04,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 253 transitions, 996 flow [2025-04-13 20:14:04,094 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-13 20:14:04,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-13 20:14:04,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 360 transitions. [2025-04-13 20:14:04,095 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.743801652892562 [2025-04-13 20:14:04,095 INFO L175 Difference]: Start difference. First operand has 127 places, 145 transitions, 401 flow. Second operand 4 states and 360 transitions. [2025-04-13 20:14:04,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 253 transitions, 996 flow [2025-04-13 20:14:04,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 253 transitions, 994 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-13 20:14:04,162 INFO L231 Difference]: Finished difference. Result has 130 places, 166 transitions, 567 flow [2025-04-13 20:14:04,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=121, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=567, PETRI_PLACES=130, PETRI_TRANSITIONS=166} [2025-04-13 20:14:04,163 INFO L279 CegarLoopForPetriNet]: 117 programPoint places, 13 predicate places. [2025-04-13 20:14:04,163 INFO L485 AbstractCegarLoop]: Abstraction has has 130 places, 166 transitions, 567 flow [2025-04-13 20:14:04,164 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:04,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 20:14:04,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 20:14:04,164 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-13 20:14:04,164 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 2 more)] === [2025-04-13 20:14:04,164 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 20:14:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1321322890, now seen corresponding path program 3 times [2025-04-13 20:14:04,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 20:14:04,165 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743075421] [2025-04-13 20:14:04,165 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 20:14:04,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 20:14:04,173 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 1 equivalence classes. [2025-04-13 20:14:04,183 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 92 of 92 statements. [2025-04-13 20:14:04,184 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-04-13 20:14:04,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 20:14:04,285 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 20:14:04,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 20:14:04,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743075421] [2025-04-13 20:14:04,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743075421] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 20:14:04,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 20:14:04,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-13 20:14:04,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98343088] [2025-04-13 20:14:04,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 20:14:04,286 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-13 20:14:04,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 20:14:04,286 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-13 20:14:04,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-13 20:14:04,295 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 121 [2025-04-13 20:14:04,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 166 transitions, 567 flow. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 20:14:04,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 20:14:04,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 121 [2025-04-13 20:14:04,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand