/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_safe-10.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:44:14,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:44:14,367 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 23:44:14,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:44:14,374 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:44:14,397 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:44:14,398 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:44:14,398 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:44:14,398 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:44:14,398 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:44:14,398 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:44:14,398 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:44:14,398 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:44:14,398 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:44:14,399 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:44:14,399 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:44:14,399 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,400 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:44:14,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:44:14,402 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:44:14,402 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:44:14,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:44:14,402 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 23:44:14,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:44:14,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:44:14,653 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:44:14,654 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:44:14,654 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:44:14,655 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-10.i [2025-04-13 23:44:15,936 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a05eaf829/edca2ef72b1046e4a3fa89cd9b9be785/FLAG570dfed65 [2025-04-13 23:44:16,190 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:44:16,191 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-10.i [2025-04-13 23:44:16,206 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a05eaf829/edca2ef72b1046e4a3fa89cd9b9be785/FLAG570dfed65 [2025-04-13 23:44:16,987 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a05eaf829/edca2ef72b1046e4a3fa89cd9b9be785 [2025-04-13 23:44:16,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:44:16,990 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:44:16,991 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:16,991 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:44:16,994 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:44:16,994 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:16" (1/1) ... [2025-04-13 23:44:16,995 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec818c1 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 23:44:16,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:16" (1/1) ... [2025-04-13 23:44:17,021 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:44:17,309 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_safe-10.i[30241,30254] [2025-04-13 23:44:17,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,353 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:44:17,394 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_safe-10.i[30241,30254] [2025-04-13 23:44:17,403 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,423 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:44:17,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17 WrapperNode [2025-04-13 23:44:17,423 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:17,424 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,424 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:44:17,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:44:17,428 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 23:44:17,443 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 23:44:17,459 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 23:44:17,459 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,460 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,460 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:44:17,460 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:44:17,464 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 23:44:17,465 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 23:44:17,466 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 23:44:17,475 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 23:44:17,475 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 23:44:17,475 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 23:44:17,477 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 23:44:17,479 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 23:44:17,482 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 23:44:17,482 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 23:44:17,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,485 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:44:17,485 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:44:17,486 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:44:17,488 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 23:44:17,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:17,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:17,512 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 23:44:17,515 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 23:44:17,532 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 23:44:17,533 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 23:44:17,533 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 23:44:17,533 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 23:44:17,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 23:44:17,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:44:17,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:44:17,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 23:44:17,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:44:17,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:44:17,534 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 23:44:17,626 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:44:17,627 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:44:17,758 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:44:17,759 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:44:17,759 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:44:17,842 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:17,844 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:17,847 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:44:17,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:44:17 BoogieIcfgContainer [2025-04-13 23:44:17,848 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:44:17,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:44:17,850 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:44:17,856 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:44:17,857 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:44:16" (1/3) ... [2025-04-13 23:44:17,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b6da2b 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 23:44:17,858 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 23:44:17,858 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b6da2b 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 23:44:17,858 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 23:44:17,859 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2025-04-13 23:44:17,870 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:44:17,871 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-10.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 23:44:17,871 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:44:17,908 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:44:17,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:17,953 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 23:44:17,954 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:17,955 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 23:44:17,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:17,961 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 52 flow [2025-04-13 23:44:17,967 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:44:17,980 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;@a4900ca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:44:17,981 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 23:44:17,988 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:44:17,989 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 23:44:17,989 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:17,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:17,989 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:17,990 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 23:44:17,994 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:17,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1578653316, now seen corresponding path program 1 times [2025-04-13 23:44:18,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,000 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613214842] [2025-04-13 23:44:18,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 23:44:18,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 23:44:18,083 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,083 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,181 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 23:44:18,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,182 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613214842] [2025-04-13 23:44:18,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613214842] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:44:18,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:44:18,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 23:44:18,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312708081] [2025-04-13 23:44:18,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,189 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:44:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:44:18,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:44:18,207 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,209 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 23:44:18,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:18,320 INFO L116 PetriNetUnfolderBase]: 233/357 cut-off events. [2025-04-13 23:44:18,320 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:44:18,321 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 23:44:18,324 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 27 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2025-04-13 23:44:18,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,325 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:44:18,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:44:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-04-13 23:44:18,353 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-04-13 23:44:18,355 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 52 flow. Second operand 3 states and 41 transitions. [2025-04-13 23:44:18,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,360 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 23:44:18,362 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,363 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 23:44:18,367 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2025-04-13 23:44:18,367 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,367 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 23:44:18,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,367 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,368 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:44:18,368 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 23:44:18,368 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576751, now seen corresponding path program 1 times [2025-04-13 23:44:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,368 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132016516] [2025-04-13 23:44:18,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,383 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,461 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 23:44:18,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,461 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132016516] [2025-04-13 23:44:18,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132016516] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:18,461 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373100210] [2025-04-13 23:44:18,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:18,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:18,463 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 23:44:18,465 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 23:44:18,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,526 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,526 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,528 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 23:44:18,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:18,557 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 23:44:18,557 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:18,579 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 23:44:18,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373100210] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:18,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:18,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 23:44:18,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597498678] [2025-04-13 23:44:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,580 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:44:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,581 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:44:18,581 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:44:18,581 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,581 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 23:44:18,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:18,726 INFO L116 PetriNetUnfolderBase]: 297/453 cut-off events. [2025-04-13 23:44:18,726 INFO L117 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-04-13 23:44:18,729 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 23:44:18,732 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 51 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2025-04-13 23:44:18,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:18,733 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 23:44:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 23:44:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2025-04-13 23:44:18,734 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2025-04-13 23:44:18,735 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 56 flow. Second operand 6 states and 71 transitions. [2025-04-13 23:44:18,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:18,735 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 23:44:18,736 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:18,736 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 23:44:18,736 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-04-13 23:44:18,736 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:18,737 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 23:44:18,737 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,737 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-13 23:44:18,937 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 23:44:18,938 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 23:44:18,938 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,938 INFO L85 PathProgramCache]: Analyzing trace with hash 328624452, now seen corresponding path program 2 times [2025-04-13 23:44:18,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,938 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197487977] [2025-04-13 23:44:18,938 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:18,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,945 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:18,959 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:18,959 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:18,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,058 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 23:44:19,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:19,058 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197487977] [2025-04-13 23:44:19,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197487977] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:19,059 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702825948] [2025-04-13 23:44:19,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:19,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:19,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:19,061 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 23:44:19,063 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 23:44:19,102 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:19,121 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:19,121 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:19,121 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 23:44:19,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:19,143 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 23:44:19,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:19,193 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 23:44:19,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702825948] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:19,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:19,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 23:44:19,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250602556] [2025-04-13 23:44:19,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:19,193 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:44:19,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:19,194 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:44:19,194 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:44:19,194 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:19,194 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 23:44:19,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:19,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:19,392 INFO L116 PetriNetUnfolderBase]: 489/741 cut-off events. [2025-04-13 23:44:19,392 INFO L117 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2025-04-13 23:44:19,394 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 23:44:19,397 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 99 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2025-04-13 23:44:19,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,397 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 23:44:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 23:44:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2025-04-13 23:44:19,398 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-04-13 23:44:19,398 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 90 flow. Second operand 12 states and 140 transitions. [2025-04-13 23:44:19,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,400 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 23:44:19,403 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,403 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 23:44:19,404 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-04-13 23:44:19,404 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,404 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 23:44:19,404 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:19,404 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:19,411 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 23:44:19,604 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 23:44:19,605 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 23:44:19,605 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:19,605 INFO L85 PathProgramCache]: Analyzing trace with hash -2090552988, now seen corresponding path program 3 times [2025-04-13 23:44:19,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:19,605 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199024490] [2025-04-13 23:44:19,605 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:19,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:19,611 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:19,630 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:19,630 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:19,630 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,791 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 23:44:19,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:19,791 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199024490] [2025-04-13 23:44:19,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199024490] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:19,791 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330943418] [2025-04-13 23:44:19,791 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:19,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:19,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:19,793 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 23:44:19,794 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 23:44:19,829 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:19,848 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:19,848 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:19,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 23:44:19,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:19,874 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 23:44:19,874 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:20,062 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 23:44:20,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330943418] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:20,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:20,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-04-13 23:44:20,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893796855] [2025-04-13 23:44:20,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:20,062 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 23:44:20,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:20,063 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 23:44:20,063 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-04-13 23:44:20,064 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:20,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 160 flow. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 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 23:44:20,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:20,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:20,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:20,455 INFO L116 PetriNetUnfolderBase]: 873/1317 cut-off events. [2025-04-13 23:44:20,455 INFO L117 PetriNetUnfolderBase]: For 7492/7492 co-relation queries the response was YES. [2025-04-13 23:44:20,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3972 conditions, 1317 events. 873/1317 cut-off events. For 7492/7492 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3837 event pairs, 39 based on Foata normal form. 192/1291 useless extension candidates. Maximal degree in co-relation 3944. Up to 337 conditions per place. [2025-04-13 23:44:20,467 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 195 selfloop transitions, 23 changer transitions 0/218 dead transitions. [2025-04-13 23:44:20,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 218 transitions, 1044 flow [2025-04-13 23:44:20,467 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 23:44:20,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 23:44:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 278 transitions. [2025-04-13 23:44:20,469 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2025-04-13 23:44:20,469 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 160 flow. Second operand 24 states and 278 transitions. [2025-04-13 23:44:20,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 218 transitions, 1044 flow [2025-04-13 23:44:20,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 218 transitions, 972 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-04-13 23:44:20,482 INFO L231 Difference]: Finished difference. Result has 78 places, 42 transitions, 280 flow [2025-04-13 23:44:20,482 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=24, PETRI_FLOW=280, PETRI_PLACES=78, PETRI_TRANSITIONS=42} [2025-04-13 23:44:20,482 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2025-04-13 23:44:20,482 INFO L485 AbstractCegarLoop]: Abstraction has has 78 places, 42 transitions, 280 flow [2025-04-13 23:44:20,483 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 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 23:44:20,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:20,484 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:20,494 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 23:44:20,684 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 23:44:20,685 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 23:44:20,685 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:20,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1826129500, now seen corresponding path program 4 times [2025-04-13 23:44:20,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:20,685 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262931493] [2025-04-13 23:44:20,685 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:20,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:20,693 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-04-13 23:44:20,718 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-04-13 23:44:20,719 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:20,719 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:22,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:22,162 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262931493] [2025-04-13 23:44:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262931493] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:22,166 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094878130] [2025-04-13 23:44:22,166 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:22,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:22,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:22,167 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 23:44:22,169 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 23:44:22,207 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-04-13 23:44:22,232 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-04-13 23:44:22,232 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:22,232 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:22,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-04-13 23:44:22,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:23,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:24,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094878130] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:24,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:24,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2025-04-13 23:44:24,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724343141] [2025-04-13 23:44:24,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:24,931 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2025-04-13 23:44:24,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:24,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2025-04-13 23:44:24,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1202, Invalid=5604, Unknown=0, NotChecked=0, Total=6806 [2025-04-13 23:44:24,935 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:24,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 42 transitions, 280 flow. Second operand has 83 states, 83 states have (on average 3.1927710843373496) internal successors, (265), 83 states have internal predecessors, (265), 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 23:44:24,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:24,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:24,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:27,509 INFO L116 PetriNetUnfolderBase]: 114039/172720 cut-off events. [2025-04-13 23:47:27,510 INFO L117 PetriNetUnfolderBase]: For 1269125/1269125 co-relation queries the response was YES. [2025-04-13 23:47:28,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592030 conditions, 172720 events. 114039/172720 cut-off events. For 1269125/1269125 co-relation queries the response was YES. Maximal size of possible extension queue 1633. Compared 1267574 event pairs, 6976 based on Foata normal form. 3571/145791 useless extension candidates. Maximal degree in co-relation 591990. Up to 41683 conditions per place. [2025-04-13 23:47:28,886 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 3836 selfloop transitions, 6005 changer transitions 2552/12393 dead transitions. [2025-04-13 23:47:28,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1115 places, 12393 transitions, 105824 flow [2025-04-13 23:47:28,887 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1038 states. [2025-04-13 23:47:28,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1038 states. [2025-04-13 23:47:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 10572 transitions. [2025-04-13 23:47:28,918 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40739884393063586 [2025-04-13 23:47:28,919 INFO L175 Difference]: Start difference. First operand has 78 places, 42 transitions, 280 flow. Second operand 1038 states and 10572 transitions. [2025-04-13 23:47:28,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1115 places, 12393 transitions, 105824 flow [2025-04-13 23:47:31,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1104 places, 12393 transitions, 81084 flow, removed 11694 selfloop flow, removed 11 redundant places. [2025-04-13 23:47:32,035 INFO L231 Difference]: Finished difference. Result has 1623 places, 6137 transitions, 38926 flow [2025-04-13 23:47:32,036 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=1038, PETRI_FLOW=38926, PETRI_PLACES=1623, PETRI_TRANSITIONS=6137} [2025-04-13 23:47:32,037 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1598 predicate places. [2025-04-13 23:47:32,037 INFO L485 AbstractCegarLoop]: Abstraction has has 1623 places, 6137 transitions, 38926 flow [2025-04-13 23:47:32,037 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.1927710843373496) internal successors, (265), 83 states have internal predecessors, (265), 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 23:47:32,037 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:32,038 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:32,044 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 23:47:32,238 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 23:47:32,238 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 23:47:32,239 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:32,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2014127741, now seen corresponding path program 1 times [2025-04-13 23:47:32,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:32,239 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119246385] [2025-04-13 23:47:32,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:32,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:32,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-04-13 23:47:32,257 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 23:47:32,257 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:32,257 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:33,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:33,529 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119246385] [2025-04-13 23:47:33,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119246385] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:33,530 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344892933] [2025-04-13 23:47:33,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:33,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:33,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:33,532 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 23:47:33,534 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 23:47:33,571 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-04-13 23:47:33,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 23:47:33,594 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:33,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:33,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-04-13 23:47:33,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 210 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:34,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:35,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344892933] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:35,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:35,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2025-04-13 23:47:35,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350670485] [2025-04-13 23:47:35,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:35,910 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2025-04-13 23:47:35,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:35,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2025-04-13 23:47:35,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=6740, Unknown=0, NotChecked=0, Total=7832 [2025-04-13 23:47:35,913 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:47:35,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1623 places, 6137 transitions, 38926 flow. Second operand has 89 states, 89 states have (on average 3.247191011235955) internal successors, (289), 89 states have internal predecessors, (289), 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 23:47:35,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:35,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:47:35,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand