/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-7.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:44:14,387 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:44:14,438 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 23:44:14,443 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:44:14,444 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:44:14,463 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:44:14,464 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:44:14,464 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:44:14,464 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:44:14,464 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:44:14,465 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:44:14,465 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:44:14,465 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:44:14,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:44:14,465 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:44:14,466 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:44:14,466 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:44:14,466 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,467 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,467 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:44:14,467 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:44:14,468 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:44:14,468 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:44:14,468 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 23:44:14,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:44:14,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:44:14,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:44:14,718 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:44:14,719 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:44:14,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-7.i [2025-04-13 23:44:16,040 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d90eb24a5/2b275bdf8eb54947897ade85f00a6fae/FLAGbb5ce62c7 [2025-04-13 23:44:16,266 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:44:16,266 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-7.i [2025-04-13 23:44:16,275 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d90eb24a5/2b275bdf8eb54947897ade85f00a6fae/FLAGbb5ce62c7 [2025-04-13 23:44:17,091 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d90eb24a5/2b275bdf8eb54947897ade85f00a6fae [2025-04-13 23:44:17,093 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:44:17,094 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:44:17,095 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:17,095 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:44:17,098 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:44:17,098 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3a3d6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17, skipping insertion in model container [2025-04-13 23:44:17,101 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,128 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:44:17,421 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-7.i[30241,30254] [2025-04-13 23:44:17,442 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,450 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:44:17,495 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-7.i[30241,30254] [2025-04-13 23:44:17,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,520 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:44:17,521 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17 WrapperNode [2025-04-13 23:44:17,521 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:17,522 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,522 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:44:17,522 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:44:17,526 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 23:44:17,539 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 23:44:17,562 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 23:44:17,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,566 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,566 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:44:17,566 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:44:17,571 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 23:44:17,571 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 23:44:17,574 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 23:44:17,584 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 23:44:17,584 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 23:44:17,584 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 23:44:17,587 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 23:44:17,588 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 23:44:17,589 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 23:44:17,590 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 23:44:17,592 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,593 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:44:17,593 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:44:17,593 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:44:17,594 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 23:44:17,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:17,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:17,622 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 23:44:17,624 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 23:44:17,639 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 23:44:17,640 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 23:44:17,640 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 23:44:17,640 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 23:44:17,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 23:44:17,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:44:17,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:44:17,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 23:44:17,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:44:17,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:44:17,641 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 23:44:17,736 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:44:17,737 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:44:17,849 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:44:17,850 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:44:17,850 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:44:17,952 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:17,956 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:17,961 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:44:17,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:44:17 BoogieIcfgContainer [2025-04-13 23:44:17,961 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:44:17,963 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:44:17,963 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:44:17,966 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:44:17,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:44:17" (1/3) ... [2025-04-13 23:44:17,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a58504 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 23:44:17,967 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 23:44:17,967 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44a58504 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 23:44:17,967 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 23:44:17,968 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-7.i [2025-04-13 23:44:17,978 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:44:17,979 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-7.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 23:44:17,979 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:44:18,017 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:44:18,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:18,069 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 23:44:18,070 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:18,071 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 23:44:18,074 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:18,076 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 52 flow [2025-04-13 23:44:18,081 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:44:18,088 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;@7ef021e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:44:18,089 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 23:44:18,095 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:44:18,095 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 23:44:18,095 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:18,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,096 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,096 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 23:44:18,103 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1578653316, now seen corresponding path program 1 times [2025-04-13 23:44:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,109 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360378524] [2025-04-13 23:44:18,109 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,177 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 23:44:18,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 23:44:18,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,198 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,346 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 23:44:18,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,346 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360378524] [2025-04-13 23:44:18,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360378524] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:44:18,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:44:18,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 23:44:18,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484493273] [2025-04-13 23:44:18,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,354 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:44:18,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:44:18,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:44:18,374 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,376 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 23:44:18,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:18,499 INFO L116 PetriNetUnfolderBase]: 233/357 cut-off events. [2025-04-13 23:44:18,500 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:44:18,501 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 23:44:18,505 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 27 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2025-04-13 23:44:18,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,506 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:44:18,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:44:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-04-13 23:44:18,516 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-04-13 23:44:18,517 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 52 flow. Second operand 3 states and 41 transitions. [2025-04-13 23:44:18,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,520 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 23:44:18,522 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,524 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 23:44:18,526 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2025-04-13 23:44:18,526 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,526 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 23:44:18,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,526 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,526 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:44:18,527 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 23:44:18,527 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576751, now seen corresponding path program 1 times [2025-04-13 23:44:18,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,527 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920439389] [2025-04-13 23:44:18,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,549 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,602 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 23:44:18,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,602 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920439389] [2025-04-13 23:44:18,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920439389] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:18,602 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34527156] [2025-04-13 23:44:18,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:18,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:18,607 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 23:44:18,608 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 23:44:18,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,667 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,667 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 23:44:18,672 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:18,700 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 23:44:18,700 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:18,717 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 23:44:18,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34527156] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:18,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:18,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 23:44:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102126733] [2025-04-13 23:44:18,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,718 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:44:18,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:44:18,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:44:18,719 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,719 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 23:44:18,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:18,837 INFO L116 PetriNetUnfolderBase]: 297/453 cut-off events. [2025-04-13 23:44:18,837 INFO L117 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-04-13 23:44:18,839 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 23:44:18,842 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 51 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2025-04-13 23:44:18,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:18,843 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 23:44:18,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 23:44:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2025-04-13 23:44:18,844 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2025-04-13 23:44:18,844 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 56 flow. Second operand 6 states and 71 transitions. [2025-04-13 23:44:18,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:18,844 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 23:44:18,845 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:18,845 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 23:44:18,846 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-04-13 23:44:18,846 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:18,846 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 23:44:18,846 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,846 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,852 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 23:44:19,050 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 23:44:19,050 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 23:44:19,051 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash 328624452, now seen corresponding path program 2 times [2025-04-13 23:44:19,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:19,051 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926092384] [2025-04-13 23:44:19,051 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:19,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:19,059 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:19,080 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:19,081 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:19,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,175 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 23:44:19,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:19,175 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926092384] [2025-04-13 23:44:19,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926092384] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:19,175 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619600945] [2025-04-13 23:44:19,176 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:19,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:19,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:19,177 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 23:44:19,179 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 23:44:19,215 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:19,233 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:19,233 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:19,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 23:44:19,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:19,254 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 23:44:19,255 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:19,328 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 23:44:19,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619600945] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:19,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:19,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 23:44:19,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900809265] [2025-04-13 23:44:19,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:19,329 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:44:19,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:19,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:44:19,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:44:19,330 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:19,330 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 23:44:19,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:19,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:19,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:19,526 INFO L116 PetriNetUnfolderBase]: 489/741 cut-off events. [2025-04-13 23:44:19,526 INFO L117 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2025-04-13 23:44:19,528 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 23:44:19,530 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 99 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2025-04-13 23:44:19,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,531 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 23:44:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 23:44:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2025-04-13 23:44:19,532 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-04-13 23:44:19,532 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 90 flow. Second operand 12 states and 140 transitions. [2025-04-13 23:44:19,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,534 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 23:44:19,535 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,535 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 23:44:19,536 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-04-13 23:44:19,536 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,536 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 23:44:19,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:19,536 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:19,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 23:44:19,741 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 23:44:19,741 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 23:44:19,741 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:19,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2090552988, now seen corresponding path program 3 times [2025-04-13 23:44:19,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:19,742 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227358039] [2025-04-13 23:44:19,742 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:19,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:19,748 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:19,779 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:19,779 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:19,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,958 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 23:44:19,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:19,958 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227358039] [2025-04-13 23:44:19,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227358039] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:19,958 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254487004] [2025-04-13 23:44:19,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:19,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:19,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:19,962 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 23:44:19,963 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 23:44:20,000 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:20,024 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:20,024 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:20,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:20,025 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 23:44:20,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:20,054 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 23:44:20,055 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:20,194 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 23:44:20,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254487004] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:20,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:20,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2025-04-13 23:44:20,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993095658] [2025-04-13 23:44:20,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:20,194 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-13 23:44:20,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:20,195 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-13 23:44:20,195 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2025-04-13 23:44:20,195 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:20,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 160 flow. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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 23:44:20,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:20,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:20,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:20,478 INFO L116 PetriNetUnfolderBase]: 681/1029 cut-off events. [2025-04-13 23:44:20,478 INFO L117 PetriNetUnfolderBase]: For 4036/4036 co-relation queries the response was YES. [2025-04-13 23:44:20,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3108 conditions, 1029 events. 681/1029 cut-off events. For 4036/4036 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2974 event pairs, 39 based on Foata normal form. 96/955 useless extension candidates. Maximal degree in co-relation 3080. Up to 241 conditions per place. [2025-04-13 23:44:20,485 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 147 selfloop transitions, 17 changer transitions 0/164 dead transitions. [2025-04-13 23:44:20,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 164 transitions, 792 flow [2025-04-13 23:44:20,485 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-13 23:44:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-13 23:44:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 206 transitions. [2025-04-13 23:44:20,487 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4577777777777778 [2025-04-13 23:44:20,487 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 160 flow. Second operand 18 states and 206 transitions. [2025-04-13 23:44:20,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 164 transitions, 792 flow [2025-04-13 23:44:20,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 164 transitions, 732 flow, removed 25 selfloop flow, removed 5 redundant places. [2025-04-13 23:44:20,496 INFO L231 Difference]: Finished difference. Result has 66 places, 36 transitions, 208 flow [2025-04-13 23:44:20,496 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=18, PETRI_FLOW=208, PETRI_PLACES=66, PETRI_TRANSITIONS=36} [2025-04-13 23:44:20,496 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 41 predicate places. [2025-04-13 23:44:20,496 INFO L485 AbstractCegarLoop]: Abstraction has has 66 places, 36 transitions, 208 flow [2025-04-13 23:44:20,497 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 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 23:44:20,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:20,497 INFO L206 CegarLoopForPetriNet]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:20,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-13 23:44:20,697 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 23:44:20,698 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 23:44:20,698 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:20,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1104911996, now seen corresponding path program 4 times [2025-04-13 23:44:20,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:20,698 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043906185] [2025-04-13 23:44:20,698 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:20,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:20,706 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-04-13 23:44:20,727 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 23:44:20,728 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:20,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:21,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:21,710 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043906185] [2025-04-13 23:44:21,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043906185] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:21,710 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188368078] [2025-04-13 23:44:21,710 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:21,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:21,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:21,713 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 23:44:21,714 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 23:44:21,752 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-04-13 23:44:21,777 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-04-13 23:44:21,777 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:21,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:21,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 59 conjuncts are in the unsatisfiable core [2025-04-13 23:44:21,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:22,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:23,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188368078] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:23,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:23,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2025-04-13 23:44:23,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639357124] [2025-04-13 23:44:23,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:23,688 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-04-13 23:44:23,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:23,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-04-13 23:44:23,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=3462, Unknown=0, NotChecked=0, Total=4160 [2025-04-13 23:44:23,691 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:23,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 36 transitions, 208 flow. Second operand has 65 states, 65 states have (on average 3.246153846153846) internal successors, (211), 65 states have internal predecessors, (211), 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 23:44:23,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:23,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:23,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:45:25,933 INFO L116 PetriNetUnfolderBase]: 48750/73963 cut-off events. [2025-04-13 23:45:25,933 INFO L117 PetriNetUnfolderBase]: For 363458/363458 co-relation queries the response was YES. [2025-04-13 23:45:26,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239095 conditions, 73963 events. 48750/73963 cut-off events. For 363458/363458 co-relation queries the response was YES. Maximal size of possible extension queue 984. Compared 504649 event pairs, 2642 based on Foata normal form. 1843/62781 useless extension candidates. Maximal degree in co-relation 239061. Up to 14623 conditions per place. [2025-04-13 23:45:26,352 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 2120 selfloop transitions, 2559 changer transitions 1316/5995 dead transitions. [2025-04-13 23:45:26,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 5995 transitions, 44726 flow [2025-04-13 23:45:26,353 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 564 states. [2025-04-13 23:45:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2025-04-13 23:45:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 5712 transitions. [2025-04-13 23:45:26,377 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4051063829787234 [2025-04-13 23:45:26,377 INFO L175 Difference]: Start difference. First operand has 66 places, 36 transitions, 208 flow. Second operand 564 states and 5712 transitions. [2025-04-13 23:45:26,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 5995 transitions, 44726 flow [2025-04-13 23:45:26,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 618 places, 5995 transitions, 36282 flow, removed 3666 selfloop flow, removed 11 redundant places. [2025-04-13 23:45:26,983 INFO L231 Difference]: Finished difference. Result has 897 places, 2661 transitions, 16912 flow [2025-04-13 23:45:26,983 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=564, PETRI_FLOW=16912, PETRI_PLACES=897, PETRI_TRANSITIONS=2661} [2025-04-13 23:45:26,984 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 872 predicate places. [2025-04-13 23:45:26,984 INFO L485 AbstractCegarLoop]: Abstraction has has 897 places, 2661 transitions, 16912 flow [2025-04-13 23:45:26,984 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.246153846153846) internal successors, (211), 65 states have internal predecessors, (211), 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 23:45:26,984 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:45:26,984 INFO L206 CegarLoopForPetriNet]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:45:26,990 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 23:45:27,184 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 23:45:27,185 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 23:45:27,185 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:45:27,185 INFO L85 PathProgramCache]: Analyzing trace with hash -50191267, now seen corresponding path program 1 times [2025-04-13 23:45:27,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:45:27,186 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913708798] [2025-04-13 23:45:27,186 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:45:27,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:45:27,191 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-04-13 23:45:27,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 23:45:27,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:45:27,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:45:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:45:27,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:45:27,919 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913708798] [2025-04-13 23:45:27,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913708798] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:45:27,919 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905543861] [2025-04-13 23:45:27,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:45:27,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:45:27,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:45:27,921 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 23:45:27,922 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 23:45:27,953 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-04-13 23:45:27,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-04-13 23:45:27,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:45:27,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:45:27,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-04-13 23:45:27,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:45:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 105 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:45:28,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:45:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:45:29,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905543861] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:45:29,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:45:29,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 69 [2025-04-13 23:45:29,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14756266] [2025-04-13 23:45:29,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:45:29,666 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2025-04-13 23:45:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:45:29,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2025-04-13 23:45:29,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=669, Invalid=4301, Unknown=0, NotChecked=0, Total=4970 [2025-04-13 23:45:29,668 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:45:29,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 897 places, 2661 transitions, 16912 flow. Second operand has 71 states, 71 states have (on average 3.3098591549295775) internal successors, (235), 71 states have internal predecessors, (235), 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 23:45:29,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:45:29,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:45:29,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand