/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/fib_unsafe-5.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:44:14,222 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:44:14,279 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 23:44:14,285 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:44:14,285 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:44:14,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:44:14,306 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:44:14,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:44:14,307 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:44:14,307 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:44:14,307 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:44:14,307 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:44:14,307 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:44:14,307 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:44:14,307 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:44:14,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:44:14,308 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:44:14,308 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:44:14,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:44:14,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:44:14,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:44:14,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:44:14,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:44:14,308 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:44:14,308 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:44:14,309 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:44:14,309 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:44:14,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:44:14,310 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:44:14,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:44:14,310 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:44:14,310 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:44:14,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:44:14,310 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 [2025-04-13 23:44:14,539 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:44:14,547 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:44:14,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:44:14,549 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:44:14,549 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:44:14,551 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-5.i [2025-04-13 23:44:15,837 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f19975d/bff230b4f03641bc937c9996b885d34d/FLAG51625db7b [2025-04-13 23:44:16,098 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:44:16,098 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-5.i [2025-04-13 23:44:16,111 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f19975d/bff230b4f03641bc937c9996b885d34d/FLAG51625db7b [2025-04-13 23:44:16,887 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f19975d/bff230b4f03641bc937c9996b885d34d [2025-04-13 23:44:16,888 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:44:16,889 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:44:16,890 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:16,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:44:16,895 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:44:16,895 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:16" (1/1) ... [2025-04-13 23:44:16,896 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6364b40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:16, skipping insertion in model container [2025-04-13 23:44:16,896 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:16" (1/1) ... [2025-04-13 23:44:16,925 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:44:17,209 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/fib_unsafe-5.i[30243,30256] [2025-04-13 23:44:17,230 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,240 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:44:17,296 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/fib_unsafe-5.i[30243,30256] [2025-04-13 23:44:17,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,329 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:44:17,330 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17 WrapperNode [2025-04-13 23:44:17,330 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:17,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,331 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:44:17,331 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:44:17,334 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,344 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,357 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 23:44:17,357 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:44:17,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:44:17,362 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,365 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,381 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 23:44:17,381 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,381 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,385 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,385 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,386 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,386 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,389 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:44:17,389 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:44:17,389 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:44:17,390 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:17,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:17,411 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 23:44:17,413 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 23:44:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 23:44:17,428 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 23:44:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 23:44:17,428 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 23:44:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 23:44:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:44:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:44:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 23:44:17,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:44:17,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:44:17,429 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 23:44:17,506 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:44:17,507 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:44:17,621 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:44:17,621 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:44:17,621 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:44:17,719 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:17,722 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:17,726 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:44:17,727 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:44:17 BoogieIcfgContainer [2025-04-13 23:44:17,727 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:44:17,729 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:44:17,729 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:44:17,732 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:44:17,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:44:16" (1/3) ... [2025-04-13 23:44:17,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5826c50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:44:17, skipping insertion in model container [2025-04-13 23:44:17,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (2/3) ... [2025-04-13 23:44:17,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5826c50e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:44:17, skipping insertion in model container [2025-04-13 23:44:17,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:44:17" (3/3) ... [2025-04-13 23:44:17,734 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-5.i [2025-04-13 23:44:17,743 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:44:17,745 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-5.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 23:44:17,745 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:44:17,775 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:44:17,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:17,820 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 23:44:17,823 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:17,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 23 events. 5/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2025-04-13 23:44:17,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:17,826 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 52 flow [2025-04-13 23:44:17,831 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:44:17,840 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;@4b6662b5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:44:17,840 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 23:44:17,848 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:44:17,849 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 23:44:17,849 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:17,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:17,851 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:17,851 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:17,855 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:17,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1578653316, now seen corresponding path program 1 times [2025-04-13 23:44:17,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:17,861 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322183066] [2025-04-13 23:44:17,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:17,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:17,917 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 23:44:17,937 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 23:44:17,938 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:17,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,083 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 23:44:18,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,084 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322183066] [2025-04-13 23:44:18,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322183066] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:44:18,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:44:18,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 23:44:18,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309691417] [2025-04-13 23:44:18,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,090 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:44:18,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:44:18,107 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:44:18,108 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:44:18,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:18,215 INFO L116 PetriNetUnfolderBase]: 233/357 cut-off events. [2025-04-13 23:44:18,216 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:44:18,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 357 events. 233/357 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 986 event pairs, 39 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 712. Up to 257 conditions per place. [2025-04-13 23:44:18,224 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 27 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2025-04-13 23:44:18,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,225 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:44:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:44:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-04-13 23:44:18,233 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-04-13 23:44:18,234 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 52 flow. Second operand 3 states and 41 transitions. [2025-04-13 23:44:18,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 23:44:18,242 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2025-04-13 23:44:18,245 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2025-04-13 23:44:18,245 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,246 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:44:18,246 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,246 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,246 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:44:18,246 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:18,246 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576751, now seen corresponding path program 1 times [2025-04-13 23:44:18,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,247 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510286384] [2025-04-13 23:44:18,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,264 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:18,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510286384] [2025-04-13 23:44:18,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510286384] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:18,314 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927161856] [2025-04-13 23:44:18,314 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:18,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:18,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:44:18,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 23:44:18,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,370 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,370 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 23:44:18,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:18,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:18,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:18,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927161856] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:18,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:18,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 23:44:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313405299] [2025-04-13 23:44:18,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,410 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:44:18,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:44:18,411 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:44:18,411 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 56 flow. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 23:44:18,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:18,514 INFO L116 PetriNetUnfolderBase]: 297/453 cut-off events. [2025-04-13 23:44:18,514 INFO L117 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-04-13 23:44:18,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 453 events. 297/453 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1244 event pairs, 39 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1016. Up to 209 conditions per place. [2025-04-13 23:44:18,517 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 51 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2025-04-13 23:44:18,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:18,518 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 23:44:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 23:44:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2025-04-13 23:44:18,518 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2025-04-13 23:44:18,518 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 56 flow. Second operand 6 states and 71 transitions. [2025-04-13 23:44:18,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:18,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 56 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 23:44:18,520 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:18,520 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2025-04-13 23:44:18,520 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-04-13 23:44:18,520 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:18,520 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 23:44:18,521 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,521 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-13 23:44:18,725 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:18,725 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:18,726 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash 328624452, now seen corresponding path program 2 times [2025-04-13 23:44:18,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,726 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605477770] [2025-04-13 23:44:18,726 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:18,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,738 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:18,771 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:18,771 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:18,771 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:18,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,867 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605477770] [2025-04-13 23:44:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605477770] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:18,868 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124991330] [2025-04-13 23:44:18,868 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:18,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:18,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:18,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:44:18,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 23:44:18,910 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:18,936 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:18,936 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:18,936 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 23:44:18,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:18,956 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:19,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124991330] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:19,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:19,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 23:44:19,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138274590] [2025-04-13 23:44:19,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:19,012 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:44:19,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:19,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:44:19,013 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:44:19,013 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:19,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 90 flow. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:44:19,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:19,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:19,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:19,207 INFO L116 PetriNetUnfolderBase]: 489/741 cut-off events. [2025-04-13 23:44:19,207 INFO L117 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2025-04-13 23:44:19,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 741 events. 489/741 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2115 event pairs, 39 based on Foata normal form. 96/715 useless extension candidates. Maximal degree in co-relation 1944. Up to 209 conditions per place. [2025-04-13 23:44:19,211 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 99 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2025-04-13 23:44:19,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,212 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 23:44:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 23:44:19,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2025-04-13 23:44:19,213 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-04-13 23:44:19,213 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 90 flow. Second operand 12 states and 140 transitions. [2025-04-13 23:44:19,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 110 transitions, 492 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-04-13 23:44:19,216 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=30} [2025-04-13 23:44:19,216 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-04-13 23:44:19,217 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,217 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-13 23:44:19,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:19,217 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:19,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-13 23:44:19,421 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-04-13 23:44:19,421 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:19,421 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:19,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2090552988, now seen corresponding path program 3 times [2025-04-13 23:44:19,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:19,422 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652044075] [2025-04-13 23:44:19,422 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:19,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:19,431 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:19,462 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:19,463 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:19,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,613 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:19,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:19,614 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652044075] [2025-04-13 23:44:19,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652044075] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:19,614 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983053393] [2025-04-13 23:44:19,614 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:19,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:19,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:19,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:44:19,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 23:44:19,654 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:19,674 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:19,674 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:19,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 23:44:19,676 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:19,720 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:19,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983053393] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:19,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:19,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2025-04-13 23:44:19,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612157445] [2025-04-13 23:44:19,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:19,819 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-13 23:44:19,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:19,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-13 23:44:19,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2025-04-13 23:44:19,819 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:19,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 160 flow. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 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 23:44:19,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:19,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:19,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:20,009 INFO L116 PetriNetUnfolderBase]: 553/837 cut-off events. [2025-04-13 23:44:20,010 INFO L117 PetriNetUnfolderBase]: For 1732/1732 co-relation queries the response was YES. [2025-04-13 23:44:20,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2532 conditions, 837 events. 553/837 cut-off events. For 1732/1732 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2394 event pairs, 39 based on Foata normal form. 32/731 useless extension candidates. Maximal degree in co-relation 2504. Up to 209 conditions per place. [2025-04-13 23:44:20,015 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 115 selfloop transitions, 13 changer transitions 0/128 dead transitions. [2025-04-13 23:44:20,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 128 transitions, 624 flow [2025-04-13 23:44:20,016 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-13 23:44:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-13 23:44:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 158 transitions. [2025-04-13 23:44:20,017 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4514285714285714 [2025-04-13 23:44:20,017 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 160 flow. Second operand 14 states and 158 transitions. [2025-04-13 23:44:20,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 128 transitions, 624 flow [2025-04-13 23:44:20,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 128 transitions, 572 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-04-13 23:44:20,026 INFO L231 Difference]: Finished difference. Result has 58 places, 32 transitions, 160 flow [2025-04-13 23:44:20,026 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=160, PETRI_PLACES=58, PETRI_TRANSITIONS=32} [2025-04-13 23:44:20,026 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 33 predicate places. [2025-04-13 23:44:20,026 INFO L485 AbstractCegarLoop]: Abstraction has has 58 places, 32 transitions, 160 flow [2025-04-13 23:44:20,026 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 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 23:44:20,026 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:20,027 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:20,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 23:44:20,231 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:20,231 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:20,232 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1022127812, now seen corresponding path program 4 times [2025-04-13 23:44:20,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:20,232 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117971751] [2025-04-13 23:44:20,232 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:20,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:20,240 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-13 23:44:20,257 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 23:44:20,258 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:20,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:20,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:20,911 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117971751] [2025-04-13 23:44:20,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117971751] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:20,911 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399273375] [2025-04-13 23:44:20,911 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:20,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:20,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:20,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:44:20,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 23:44:20,953 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 23 statements into 2 equivalence classes. [2025-04-13 23:44:20,972 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-04-13 23:44:20,972 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:20,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:20,974 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-04-13 23:44:20,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 55 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:21,599 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:22,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399273375] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:22,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:22,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2025-04-13 23:44:22,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598475932] [2025-04-13 23:44:22,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:22,383 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-04-13 23:44:22,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:22,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-04-13 23:44:22,385 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=2369, Unknown=0, NotChecked=0, Total=2756 [2025-04-13 23:44:22,385 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:22,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 32 transitions, 160 flow. Second operand has 53 states, 53 states have (on average 3.30188679245283) internal successors, (175), 53 states have internal predecessors, (175), 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 23:44:22,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:22,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:22,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:28,761 INFO L116 PetriNetUnfolderBase]: 8593/13018 cut-off events. [2025-04-13 23:44:28,762 INFO L117 PetriNetUnfolderBase]: For 29066/29066 co-relation queries the response was YES. [2025-04-13 23:44:28,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37222 conditions, 13018 events. 8593/13018 cut-off events. For 29066/29066 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 69112 event pairs, 85 based on Foata normal form. 232/11058 useless extension candidates. Maximal degree in co-relation 37192. Up to 1909 conditions per place. [2025-04-13 23:44:28,816 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 412 selfloop transitions, 445 changer transitions 164/1021 dead transitions. [2025-04-13 23:44:28,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 1021 transitions, 6619 flow [2025-04-13 23:44:28,817 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2025-04-13 23:44:28,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2025-04-13 23:44:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 938 transitions. [2025-04-13 23:44:28,822 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38285714285714284 [2025-04-13 23:44:28,822 INFO L175 Difference]: Start difference. First operand has 58 places, 32 transitions, 160 flow. Second operand 98 states and 938 transitions. [2025-04-13 23:44:28,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 1021 transitions, 6619 flow [2025-04-13 23:44:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 1021 transitions, 5637 flow, removed 210 selfloop flow, removed 11 redundant places. [2025-04-13 23:44:28,868 INFO L231 Difference]: Finished difference. Result has 178 places, 522 transitions, 3104 flow [2025-04-13 23:44:28,868 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=98, PETRI_FLOW=3104, PETRI_PLACES=178, PETRI_TRANSITIONS=522} [2025-04-13 23:44:28,868 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 153 predicate places. [2025-04-13 23:44:28,869 INFO L485 AbstractCegarLoop]: Abstraction has has 178 places, 522 transitions, 3104 flow [2025-04-13 23:44:28,869 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.30188679245283) internal successors, (175), 53 states have internal predecessors, (175), 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 23:44:28,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:28,869 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:28,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 23:44:29,071 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:29,071 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:29,071 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:29,071 INFO L85 PathProgramCache]: Analyzing trace with hash 927339933, now seen corresponding path program 1 times [2025-04-13 23:44:29,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:29,072 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447212031] [2025-04-13 23:44:29,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:29,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:29,076 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-13 23:44:29,086 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 23:44:29,086 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:29,086 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:29,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:29,672 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447212031] [2025-04-13 23:44:29,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447212031] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:29,672 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036994298] [2025-04-13 23:44:29,672 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:29,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:29,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:29,674 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:44:29,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 23:44:29,704 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-13 23:44:29,722 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 23:44:29,722 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:29,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:29,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 23:44:29,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 55 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:30,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:30,857 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:30,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036994298] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:30,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:30,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 56 [2025-04-13 23:44:30,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373340056] [2025-04-13 23:44:30,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:30,858 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-04-13 23:44:30,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:30,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-04-13 23:44:30,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2872, Unknown=0, NotChecked=0, Total=3306 [2025-04-13 23:44:30,862 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:30,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 522 transitions, 3104 flow. Second operand has 58 states, 58 states have (on average 3.3793103448275863) internal successors, (196), 58 states have internal predecessors, (196), 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 23:44:30,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:30,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:30,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:45:02,924 INFO L116 PetriNetUnfolderBase]: 81491/123910 cut-off events. [2025-04-13 23:45:02,925 INFO L117 PetriNetUnfolderBase]: For 3876423/3876423 co-relation queries the response was YES. [2025-04-13 23:45:03,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548576 conditions, 123910 events. 81491/123910 cut-off events. For 3876423/3876423 co-relation queries the response was YES. Maximal size of possible extension queue 2155. Compared 932291 event pairs, 5003 based on Foata normal form. 3762/107288 useless extension candidates. Maximal degree in co-relation 548510. Up to 18761 conditions per place. [2025-04-13 23:45:04,261 INFO L140 encePairwiseOnDemand]: 16/25 looper letters, 1313 selfloop transitions, 4724 changer transitions 1383/7420 dead transitions. [2025-04-13 23:45:04,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 7420 transitions, 58181 flow [2025-04-13 23:45:04,262 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2025-04-13 23:45:04,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2025-04-13 23:45:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 2486 transitions. [2025-04-13 23:45:04,275 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3738345864661654 [2025-04-13 23:45:04,275 INFO L175 Difference]: Start difference. First operand has 178 places, 522 transitions, 3104 flow. Second operand 266 states and 2486 transitions. [2025-04-13 23:45:04,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 7420 transitions, 58181 flow [2025-04-13 23:46:49,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 7420 transitions, 53121 flow, removed 2507 selfloop flow, removed 32 redundant places. [2025-04-13 23:46:50,037 INFO L231 Difference]: Finished difference. Result has 525 places, 5182 transitions, 41707 flow [2025-04-13 23:46:50,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=266, PETRI_FLOW=41707, PETRI_PLACES=525, PETRI_TRANSITIONS=5182} [2025-04-13 23:46:50,038 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 500 predicate places. [2025-04-13 23:46:50,038 INFO L485 AbstractCegarLoop]: Abstraction has has 525 places, 5182 transitions, 41707 flow [2025-04-13 23:46:50,039 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.3793103448275863) internal successors, (196), 58 states have internal predecessors, (196), 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 23:46:50,039 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:46:50,039 INFO L206 CegarLoopForPetriNet]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:46:50,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-13 23:46:50,239 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:46:50,240 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:46:50,240 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:46:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 895804028, now seen corresponding path program 1 times [2025-04-13 23:46:50,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:46:50,240 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248463067] [2025-04-13 23:46:50,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:46:50,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:46:50,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-13 23:46:50,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 23:46:50,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:46:50,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:50,796 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:50,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:46:50,797 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248463067] [2025-04-13 23:46:50,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248463067] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:46:50,797 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935182308] [2025-04-13 23:46:50,797 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:46:50,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:46:50,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:46:50,802 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-13 23:46:50,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-13 23:46:50,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-13 23:46:50,861 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 23:46:50,861 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:46:50,861 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:46:50,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjuncts are in the unsatisfiable core [2025-04-13 23:46:50,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:46:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 55 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:51,345 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:46:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:46:51,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935182308] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:46:51,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:46:51,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 56 [2025-04-13 23:46:51,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717042264] [2025-04-13 23:46:51,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:46:51,869 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2025-04-13 23:46:51,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:46:51,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2025-04-13 23:46:51,870 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=2874, Unknown=0, NotChecked=0, Total=3306 [2025-04-13 23:46:51,871 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:46:51,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 5182 transitions, 41707 flow. Second operand has 58 states, 58 states have (on average 3.3793103448275863) internal successors, (196), 58 states have internal predecessors, (196), 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 23:46:51,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:46:51,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:46:51,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand