/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/weaver/mult-flipped-dist.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 00:49:37,979 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 00:49:38,035 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-14 00:49:38,039 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 00:49:38,040 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 00:49:38,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 00:49:38,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 00:49:38,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 00:49:38,061 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 00:49:38,062 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 00:49:38,062 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 00:49:38,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 00:49:38,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 00:49:38,062 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 00:49:38,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 00:49:38,063 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:49:38,063 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:49:38,064 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:49:38,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 00:49:38,064 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-14 00:49:38,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 00:49:38,292 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 00:49:38,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 00:49:38,298 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 00:49:38,298 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 00:49:38,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2025-04-14 00:49:39,584 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ef8255f9/4b68cd0ec2084aa889485973d8fb99e4/FLAG5b6583ec7 [2025-04-14 00:49:39,791 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 00:49:39,791 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c [2025-04-14 00:49:39,797 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ef8255f9/4b68cd0ec2084aa889485973d8fb99e4/FLAG5b6583ec7 [2025-04-14 00:49:40,634 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ef8255f9/4b68cd0ec2084aa889485973d8fb99e4 [2025-04-14 00:49:40,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 00:49:40,638 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 00:49:40,638 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 00:49:40,638 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 00:49:40,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 00:49:40,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@615f1062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40, skipping insertion in model container [2025-04-14 00:49:40,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,652 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 00:49:40,794 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2174,2187] [2025-04-14 00:49:40,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:49:40,805 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 00:49:40,838 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-flipped-dist.wvr.c[2174,2187] [2025-04-14 00:49:40,838 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:49:40,849 INFO L204 MainTranslator]: Completed translation [2025-04-14 00:49:40,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40 WrapperNode [2025-04-14 00:49:40,850 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 00:49:40,850 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 00:49:40,850 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 00:49:40,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 00:49:40,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,874 INFO L138 Inliner]: procedures = 21, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 54 [2025-04-14 00:49:40,874 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 00:49:40,875 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 00:49:40,875 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 00:49:40,875 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 00:49:40,880 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,882 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,891 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-04-14 00:49:40,891 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,891 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,894 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,894 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,895 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,896 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,898 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 00:49:40,899 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 00:49:40,899 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 00:49:40,899 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 00:49:40,900 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (1/1) ... [2025-04-14 00:49:40,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:49:40,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:40,939 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-14 00:49:40,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-14 00:49:40,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 00:49:40,971 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-14 00:49:40,971 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-14 00:49:40,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-14 00:49:40,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-14 00:49:40,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-04-14 00:49:40,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-04-14 00:49:40,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 00:49:40,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 00:49:40,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 00:49:40,973 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-14 00:49:41,048 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 00:49:41,050 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 00:49:41,207 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 00:49:41,207 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 00:49:41,207 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 00:49:41,367 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 00:49:41,367 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:49:41 BoogieIcfgContainer [2025-04-14 00:49:41,367 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 00:49:41,369 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 00:49:41,369 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 00:49:41,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 00:49:41,373 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 12:49:40" (1/3) ... [2025-04-14 00:49:41,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b42e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:49:41, skipping insertion in model container [2025-04-14 00:49:41,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:49:40" (2/3) ... [2025-04-14 00:49:41,375 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b42e21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:49:41, skipping insertion in model container [2025-04-14 00:49:41,375 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:49:41" (3/3) ... [2025-04-14 00:49:41,377 INFO L128 eAbstractionObserver]: Analyzing ICFG mult-flipped-dist.wvr.c [2025-04-14 00:49:41,386 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 00:49:41,387 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG mult-flipped-dist.wvr.c that has 4 procedures, 22 locations, 21 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-14 00:49:41,387 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 00:49:41,429 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-04-14 00:49:41,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 31 places, 24 transitions, 69 flow [2025-04-14 00:49:41,479 INFO L116 PetriNetUnfolderBase]: 3/21 cut-off events. [2025-04-14 00:49:41,480 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-14 00:49:41,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 21 events. 3/21 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 13 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2025-04-14 00:49:41,484 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 24 transitions, 69 flow [2025-04-14 00:49:41,488 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 20 transitions, 58 flow [2025-04-14 00:49:41,497 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 00:49:41,507 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;@d79247e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 00:49:41,507 INFO L341 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2025-04-14 00:49:41,519 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 00:49:41,519 INFO L116 PetriNetUnfolderBase]: 3/19 cut-off events. [2025-04-14 00:49:41,519 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-14 00:49:41,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:41,522 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:41,522 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:41,527 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:41,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1656096952, now seen corresponding path program 1 times [2025-04-14 00:49:41,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:41,533 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286631127] [2025-04-14 00:49:41,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:41,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:41,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 00:49:41,638 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:49:41,639 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:41,639 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:42,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:42,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:42,031 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286631127] [2025-04-14 00:49:42,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286631127] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:49:42,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:49:42,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 00:49:42,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628494405] [2025-04-14 00:49:42,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:49:42,038 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 00:49:42,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:42,055 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 00:49:42,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 00:49:42,058 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:42,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:42,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:42,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:42,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:42,210 INFO L116 PetriNetUnfolderBase]: 386/564 cut-off events. [2025-04-14 00:49:42,210 INFO L117 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2025-04-14 00:49:42,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1205 conditions, 564 events. 386/564 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1766 event pairs, 124 based on Foata normal form. 1/415 useless extension candidates. Maximal degree in co-relation 1030. Up to 349 conditions per place. [2025-04-14 00:49:42,215 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 32 selfloop transitions, 4 changer transitions 1/37 dead transitions. [2025-04-14 00:49:42,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 37 transitions, 181 flow [2025-04-14 00:49:42,216 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 00:49:42,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 00:49:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2025-04-14 00:49:42,225 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2025-04-14 00:49:42,226 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 58 flow. Second operand 3 states and 47 transitions. [2025-04-14 00:49:42,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 37 transitions, 181 flow [2025-04-14 00:49:42,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 37 transitions, 159 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-04-14 00:49:42,232 INFO L231 Difference]: Finished difference. Result has 24 places, 23 transitions, 72 flow [2025-04-14 00:49:42,234 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=24, PETRI_TRANSITIONS=23} [2025-04-14 00:49:42,236 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, -3 predicate places. [2025-04-14 00:49:42,236 INFO L485 AbstractCegarLoop]: Abstraction has has 24 places, 23 transitions, 72 flow [2025-04-14 00:49:42,236 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:42,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:42,236 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:42,236 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 00:49:42,236 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:42,237 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:42,237 INFO L85 PathProgramCache]: Analyzing trace with hash 607591311, now seen corresponding path program 1 times [2025-04-14 00:49:42,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:42,237 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035834121] [2025-04-14 00:49:42,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:42,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:42,243 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 00:49:42,261 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:42,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:42,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:42,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:42,389 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035834121] [2025-04-14 00:49:42,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035834121] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:49:42,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:49:42,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-14 00:49:42,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058444247] [2025-04-14 00:49:42,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:49:42,390 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 00:49:42,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:42,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 00:49:42,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-14 00:49:42,391 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:42,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 23 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:42,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:42,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:42,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:42,632 INFO L116 PetriNetUnfolderBase]: 480/728 cut-off events. [2025-04-14 00:49:42,632 INFO L117 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2025-04-14 00:49:42,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1707 conditions, 728 events. 480/728 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2717 event pairs, 144 based on Foata normal form. 65/793 useless extension candidates. Maximal degree in co-relation 489. Up to 361 conditions per place. [2025-04-14 00:49:42,639 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 48 selfloop transitions, 6 changer transitions 3/57 dead transitions. [2025-04-14 00:49:42,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 57 transitions, 277 flow [2025-04-14 00:49:42,640 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:49:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:49:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 71 transitions. [2025-04-14 00:49:42,641 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2025-04-14 00:49:42,642 INFO L175 Difference]: Start difference. First operand has 24 places, 23 transitions, 72 flow. Second operand 5 states and 71 transitions. [2025-04-14 00:49:42,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 57 transitions, 277 flow [2025-04-14 00:49:42,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 57 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:42,643 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 123 flow [2025-04-14 00:49:42,643 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2025-04-14 00:49:42,644 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2025-04-14 00:49:42,644 INFO L485 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 123 flow [2025-04-14 00:49:42,644 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:42,644 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:42,644 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:42,644 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 00:49:42,644 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:42,646 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:42,646 INFO L85 PathProgramCache]: Analyzing trace with hash -958322883, now seen corresponding path program 1 times [2025-04-14 00:49:42,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:42,646 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918553060] [2025-04-14 00:49:42,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:42,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:42,655 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 00:49:42,664 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:42,664 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:42,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:42,759 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918553060] [2025-04-14 00:49:42,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918553060] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:42,760 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788701951] [2025-04-14 00:49:42,760 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:42,764 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) [2025-04-14 00:49:42,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-14 00:49:42,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 00:49:42,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:42,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:42,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:42,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 00:49:42,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:42,864 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:42,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788701951] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:42,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 00:49:42,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-04-14 00:49:42,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551837296] [2025-04-14 00:49:42,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:49:42,905 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 00:49:42,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:42,905 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 00:49:42,905 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-04-14 00:49:42,905 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:42,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:42,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:42,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:42,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:43,057 INFO L116 PetriNetUnfolderBase]: 549/830 cut-off events. [2025-04-14 00:49:43,057 INFO L117 PetriNetUnfolderBase]: For 977/977 co-relation queries the response was YES. [2025-04-14 00:49:43,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 830 events. 549/830 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3179 event pairs, 147 based on Foata normal form. 33/863 useless extension candidates. Maximal degree in co-relation 877. Up to 483 conditions per place. [2025-04-14 00:49:43,064 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 44 selfloop transitions, 5 changer transitions 7/56 dead transitions. [2025-04-14 00:49:43,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 56 transitions, 353 flow [2025-04-14 00:49:43,064 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 00:49:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 00:49:43,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2025-04-14 00:49:43,065 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2025-04-14 00:49:43,065 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 123 flow. Second operand 4 states and 61 transitions. [2025-04-14 00:49:43,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 56 transitions, 353 flow [2025-04-14 00:49:43,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 56 transitions, 341 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:43,068 INFO L231 Difference]: Finished difference. Result has 34 places, 29 transitions, 149 flow [2025-04-14 00:49:43,068 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=34, PETRI_TRANSITIONS=29} [2025-04-14 00:49:43,068 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 7 predicate places. [2025-04-14 00:49:43,070 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 29 transitions, 149 flow [2025-04-14 00:49:43,070 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:43,070 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:43,070 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:43,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-14 00:49:43,275 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:43,275 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:43,276 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash 964366213, now seen corresponding path program 2 times [2025-04-14 00:49:43,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:43,276 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473428662] [2025-04-14 00:49:43,276 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:43,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:43,281 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 00:49:43,289 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:43,290 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:43,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:43,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:43,346 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473428662] [2025-04-14 00:49:43,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473428662] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:49:43,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:49:43,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 00:49:43,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508148752] [2025-04-14 00:49:43,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:49:43,346 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 00:49:43,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:43,346 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 00:49:43,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 00:49:43,347 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:43,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 29 transitions, 149 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:43,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:43,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:43,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:43,494 INFO L116 PetriNetUnfolderBase]: 663/1019 cut-off events. [2025-04-14 00:49:43,495 INFO L117 PetriNetUnfolderBase]: For 1803/1803 co-relation queries the response was YES. [2025-04-14 00:49:43,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3500 conditions, 1019 events. 663/1019 cut-off events. For 1803/1803 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4168 event pairs, 217 based on Foata normal form. 34/1053 useless extension candidates. Maximal degree in co-relation 1349. Up to 552 conditions per place. [2025-04-14 00:49:43,500 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 51 selfloop transitions, 6 changer transitions 4/61 dead transitions. [2025-04-14 00:49:43,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 61 transitions, 419 flow [2025-04-14 00:49:43,501 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 00:49:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 00:49:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 57 transitions. [2025-04-14 00:49:43,503 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-04-14 00:49:43,503 INFO L175 Difference]: Start difference. First operand has 34 places, 29 transitions, 149 flow. Second operand 4 states and 57 transitions. [2025-04-14 00:49:43,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 61 transitions, 419 flow [2025-04-14 00:49:43,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 61 transitions, 412 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:43,507 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 191 flow [2025-04-14 00:49:43,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=191, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2025-04-14 00:49:43,509 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 11 predicate places. [2025-04-14 00:49:43,509 INFO L485 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 191 flow [2025-04-14 00:49:43,509 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:43,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:43,510 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:43,510 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-14 00:49:43,510 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:43,510 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash -2057128044, now seen corresponding path program 1 times [2025-04-14 00:49:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:43,510 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642985878] [2025-04-14 00:49:43,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:43,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:43,516 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 00:49:43,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:43,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:43,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:43,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:43,592 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642985878] [2025-04-14 00:49:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642985878] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:43,592 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038824714] [2025-04-14 00:49:43,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:43,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:43,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:43,597 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) [2025-04-14 00:49:43,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-14 00:49:43,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-04-14 00:49:43,641 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:43,641 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:43,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:43,643 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 00:49:43,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:43,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038824714] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:43,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:43,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2025-04-14 00:49:43,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956103183] [2025-04-14 00:49:43,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:43,740 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-14 00:49:43,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:43,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-14 00:49:43,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2025-04-14 00:49:43,740 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:43,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 191 flow. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:43,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:43,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:43,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:43,938 INFO L116 PetriNetUnfolderBase]: 804/1212 cut-off events. [2025-04-14 00:49:43,938 INFO L117 PetriNetUnfolderBase]: For 3511/3511 co-relation queries the response was YES. [2025-04-14 00:49:43,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4919 conditions, 1212 events. 804/1212 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4956 event pairs, 355 based on Foata normal form. 44/1256 useless extension candidates. Maximal degree in co-relation 1847. Up to 889 conditions per place. [2025-04-14 00:49:43,944 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 54 selfloop transitions, 23 changer transitions 3/80 dead transitions. [2025-04-14 00:49:43,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 80 transitions, 705 flow [2025-04-14 00:49:43,945 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-14 00:49:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-14 00:49:43,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 79 transitions. [2025-04-14 00:49:43,946 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5486111111111112 [2025-04-14 00:49:43,946 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 191 flow. Second operand 6 states and 79 transitions. [2025-04-14 00:49:43,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 80 transitions, 705 flow [2025-04-14 00:49:43,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 80 transitions, 662 flow, removed 13 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:43,950 INFO L231 Difference]: Finished difference. Result has 45 places, 51 transitions, 466 flow [2025-04-14 00:49:43,950 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2025-04-14 00:49:43,951 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 18 predicate places. [2025-04-14 00:49:43,951 INFO L485 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 466 flow [2025-04-14 00:49:43,951 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 8 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:43,951 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:43,951 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:43,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-14 00:49:44,151 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:44,152 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:44,152 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:44,152 INFO L85 PathProgramCache]: Analyzing trace with hash 147619, now seen corresponding path program 2 times [2025-04-14 00:49:44,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:44,152 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137245887] [2025-04-14 00:49:44,152 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:44,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:44,156 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 18 statements into 2 equivalence classes. [2025-04-14 00:49:44,163 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:44,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:44,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:44,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:44,203 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137245887] [2025-04-14 00:49:44,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137245887] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:49:44,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:49:44,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 00:49:44,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786820283] [2025-04-14 00:49:44,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:49:44,204 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 00:49:44,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:44,204 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 00:49:44,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-14 00:49:44,204 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:44,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 466 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:44,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:44,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:44,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:44,338 INFO L116 PetriNetUnfolderBase]: 780/1158 cut-off events. [2025-04-14 00:49:44,338 INFO L117 PetriNetUnfolderBase]: For 4603/4603 co-relation queries the response was YES. [2025-04-14 00:49:44,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5462 conditions, 1158 events. 780/1158 cut-off events. For 4603/4603 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4615 event pairs, 182 based on Foata normal form. 32/1190 useless extension candidates. Maximal degree in co-relation 3698. Up to 706 conditions per place. [2025-04-14 00:49:44,345 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 56 selfloop transitions, 13 changer transitions 8/77 dead transitions. [2025-04-14 00:49:44,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 77 transitions, 782 flow [2025-04-14 00:49:44,345 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 00:49:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 00:49:44,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2025-04-14 00:49:44,346 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-04-14 00:49:44,346 INFO L175 Difference]: Start difference. First operand has 45 places, 51 transitions, 466 flow. Second operand 4 states and 60 transitions. [2025-04-14 00:49:44,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 77 transitions, 782 flow [2025-04-14 00:49:44,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 77 transitions, 763 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:44,354 INFO L231 Difference]: Finished difference. Result has 49 places, 51 transitions, 501 flow [2025-04-14 00:49:44,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=450, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=501, PETRI_PLACES=49, PETRI_TRANSITIONS=51} [2025-04-14 00:49:44,354 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 22 predicate places. [2025-04-14 00:49:44,355 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 51 transitions, 501 flow [2025-04-14 00:49:44,355 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:44,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:44,355 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:44,355 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-14 00:49:44,355 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:44,355 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash -804185327, now seen corresponding path program 3 times [2025-04-14 00:49:44,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:44,355 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401874266] [2025-04-14 00:49:44,356 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:49:44,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:44,363 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 2 equivalence classes. [2025-04-14 00:49:44,369 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:44,369 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:49:44,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:44,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:44,405 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401874266] [2025-04-14 00:49:44,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401874266] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:49:44,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:49:44,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-04-14 00:49:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953501565] [2025-04-14 00:49:44,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:49:44,406 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 00:49:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:44,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 00:49:44,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 00:49:44,406 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:44,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 501 flow. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:44,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:44,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:44,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:44,553 INFO L116 PetriNetUnfolderBase]: 869/1298 cut-off events. [2025-04-14 00:49:44,553 INFO L117 PetriNetUnfolderBase]: For 7022/7022 co-relation queries the response was YES. [2025-04-14 00:49:44,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6320 conditions, 1298 events. 869/1298 cut-off events. For 7022/7022 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5152 event pairs, 310 based on Foata normal form. 57/1355 useless extension candidates. Maximal degree in co-relation 4319. Up to 938 conditions per place. [2025-04-14 00:49:44,561 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 79 selfloop transitions, 7 changer transitions 5/91 dead transitions. [2025-04-14 00:49:44,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 91 transitions, 1033 flow [2025-04-14 00:49:44,561 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 00:49:44,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 00:49:44,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2025-04-14 00:49:44,562 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5625 [2025-04-14 00:49:44,562 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 501 flow. Second operand 4 states and 54 transitions. [2025-04-14 00:49:44,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 91 transitions, 1033 flow [2025-04-14 00:49:44,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 91 transitions, 1016 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:44,572 INFO L231 Difference]: Finished difference. Result has 51 places, 54 transitions, 576 flow [2025-04-14 00:49:44,572 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=576, PETRI_PLACES=51, PETRI_TRANSITIONS=54} [2025-04-14 00:49:44,573 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2025-04-14 00:49:44,573 INFO L485 AbstractCegarLoop]: Abstraction has has 51 places, 54 transitions, 576 flow [2025-04-14 00:49:44,573 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:44,573 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:44,573 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:44,573 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-04-14 00:49:44,573 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:44,575 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:44,575 INFO L85 PathProgramCache]: Analyzing trace with hash -2144355509, now seen corresponding path program 4 times [2025-04-14 00:49:44,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:44,575 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141246997] [2025-04-14 00:49:44,575 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:49:44,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:44,582 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 00:49:44,589 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:44,590 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:49:44,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:44,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:44,648 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141246997] [2025-04-14 00:49:44,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141246997] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:44,648 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419323780] [2025-04-14 00:49:44,648 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:49:44,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:44,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:44,651 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) [2025-04-14 00:49:44,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-14 00:49:44,682 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 18 statements into 2 equivalence classes. [2025-04-14 00:49:44,694 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 18 of 18 statements. [2025-04-14 00:49:44,694 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:49:44,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:44,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 00:49:44,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:44,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:44,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:44,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419323780] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:44,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:44,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2025-04-14 00:49:44,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691897257] [2025-04-14 00:49:44,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:44,775 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-14 00:49:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:44,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-14 00:49:44,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-04-14 00:49:44,775 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:44,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 54 transitions, 576 flow. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:44,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:44,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:44,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:45,071 INFO L116 PetriNetUnfolderBase]: 952/1388 cut-off events. [2025-04-14 00:49:45,072 INFO L117 PetriNetUnfolderBase]: For 8865/8865 co-relation queries the response was YES. [2025-04-14 00:49:45,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7778 conditions, 1388 events. 952/1388 cut-off events. For 8865/8865 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5425 event pairs, 296 based on Foata normal form. 57/1445 useless extension candidates. Maximal degree in co-relation 6585. Up to 874 conditions per place. [2025-04-14 00:49:45,087 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 67 selfloop transitions, 43 changer transitions 6/116 dead transitions. [2025-04-14 00:49:45,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 116 transitions, 1382 flow [2025-04-14 00:49:45,087 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 00:49:45,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 00:49:45,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 90 transitions. [2025-04-14 00:49:45,089 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2025-04-14 00:49:45,089 INFO L175 Difference]: Start difference. First operand has 51 places, 54 transitions, 576 flow. Second operand 7 states and 90 transitions. [2025-04-14 00:49:45,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 116 transitions, 1382 flow [2025-04-14 00:49:45,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 116 transitions, 1291 flow, removed 38 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:45,106 INFO L231 Difference]: Finished difference. Result has 60 places, 76 transitions, 974 flow [2025-04-14 00:49:45,106 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=60, PETRI_TRANSITIONS=76} [2025-04-14 00:49:45,107 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 33 predicate places. [2025-04-14 00:49:45,107 INFO L485 AbstractCegarLoop]: Abstraction has has 60 places, 76 transitions, 974 flow [2025-04-14 00:49:45,107 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:45,107 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:45,107 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:45,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-14 00:49:45,307 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:45,308 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:45,308 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:45,308 INFO L85 PathProgramCache]: Analyzing trace with hash 529842365, now seen corresponding path program 1 times [2025-04-14 00:49:45,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:45,308 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026272016] [2025-04-14 00:49:45,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:45,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:45,312 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:49:45,316 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:49:45,316 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:45,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:45,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:45,373 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026272016] [2025-04-14 00:49:45,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026272016] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:45,373 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190804192] [2025-04-14 00:49:45,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:45,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:45,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:45,375 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) [2025-04-14 00:49:45,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-14 00:49:45,406 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-14 00:49:45,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:49:45,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:45,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:45,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 00:49:45,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:45,442 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:45,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190804192] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:45,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-04-14 00:49:45,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2025-04-14 00:49:45,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362429698] [2025-04-14 00:49:45,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:49:45,474 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 00:49:45,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:45,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 00:49:45,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-04-14 00:49:45,474 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:45,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 76 transitions, 974 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 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) [2025-04-14 00:49:45,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:45,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:45,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:45,655 INFO L116 PetriNetUnfolderBase]: 1046/1515 cut-off events. [2025-04-14 00:49:45,655 INFO L117 PetriNetUnfolderBase]: For 11131/11131 co-relation queries the response was YES. [2025-04-14 00:49:45,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9145 conditions, 1515 events. 1046/1515 cut-off events. For 11131/11131 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 6018 event pairs, 212 based on Foata normal form. 49/1564 useless extension candidates. Maximal degree in co-relation 8064. Up to 1261 conditions per place. [2025-04-14 00:49:45,669 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 89 selfloop transitions, 15 changer transitions 1/105 dead transitions. [2025-04-14 00:49:45,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 105 transitions, 1462 flow [2025-04-14 00:49:45,669 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 00:49:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 00:49:45,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2025-04-14 00:49:45,670 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5729166666666666 [2025-04-14 00:49:45,670 INFO L175 Difference]: Start difference. First operand has 60 places, 76 transitions, 974 flow. Second operand 4 states and 55 transitions. [2025-04-14 00:49:45,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 105 transitions, 1462 flow [2025-04-14 00:49:45,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 105 transitions, 1395 flow, removed 20 selfloop flow, removed 2 redundant places. [2025-04-14 00:49:45,689 INFO L231 Difference]: Finished difference. Result has 62 places, 80 transitions, 1019 flow [2025-04-14 00:49:45,689 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1019, PETRI_PLACES=62, PETRI_TRANSITIONS=80} [2025-04-14 00:49:45,689 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 35 predicate places. [2025-04-14 00:49:45,689 INFO L485 AbstractCegarLoop]: Abstraction has has 62 places, 80 transitions, 1019 flow [2025-04-14 00:49:45,690 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 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) [2025-04-14 00:49:45,690 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:45,690 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:45,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-14 00:49:45,890 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:45,891 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:45,891 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash 699516413, now seen corresponding path program 2 times [2025-04-14 00:49:45,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:45,891 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658625260] [2025-04-14 00:49:45,891 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:45,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:45,902 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:49:45,908 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:49:45,908 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:45,908 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:46,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:46,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:46,020 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658625260] [2025-04-14 00:49:46,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658625260] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:46,020 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886669249] [2025-04-14 00:49:46,020 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:46,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:46,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:46,022 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) [2025-04-14 00:49:46,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-14 00:49:46,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:49:46,067 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:49:46,067 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:46,067 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:46,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 00:49:46,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:46,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:46,094 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:46,126 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:46,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886669249] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:46,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:46,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2025-04-14 00:49:46,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821754158] [2025-04-14 00:49:46,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:46,127 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-14 00:49:46,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:46,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-14 00:49:46,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-04-14 00:49:46,127 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:46,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 80 transitions, 1019 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:46,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:46,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:46,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:46,393 INFO L116 PetriNetUnfolderBase]: 1347/1942 cut-off events. [2025-04-14 00:49:46,393 INFO L117 PetriNetUnfolderBase]: For 15371/15371 co-relation queries the response was YES. [2025-04-14 00:49:46,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12021 conditions, 1942 events. 1347/1942 cut-off events. For 15371/15371 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 8030 event pairs, 279 based on Foata normal form. 37/1979 useless extension candidates. Maximal degree in co-relation 10721. Up to 1067 conditions per place. [2025-04-14 00:49:46,407 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 124 selfloop transitions, 69 changer transitions 3/196 dead transitions. [2025-04-14 00:49:46,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 196 transitions, 2762 flow [2025-04-14 00:49:46,407 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 00:49:46,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 00:49:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2025-04-14 00:49:46,408 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2025-04-14 00:49:46,408 INFO L175 Difference]: Start difference. First operand has 62 places, 80 transitions, 1019 flow. Second operand 10 states and 116 transitions. [2025-04-14 00:49:46,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 196 transitions, 2762 flow [2025-04-14 00:49:46,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 196 transitions, 2734 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:46,427 INFO L231 Difference]: Finished difference. Result has 75 places, 127 transitions, 1892 flow [2025-04-14 00:49:46,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1892, PETRI_PLACES=75, PETRI_TRANSITIONS=127} [2025-04-14 00:49:46,427 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 48 predicate places. [2025-04-14 00:49:46,427 INFO L485 AbstractCegarLoop]: Abstraction has has 75 places, 127 transitions, 1892 flow [2025-04-14 00:49:46,427 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:46,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:46,428 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:46,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-14 00:49:46,632 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-04-14 00:49:46,632 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:46,633 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1991918681, now seen corresponding path program 3 times [2025-04-14 00:49:46,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:46,633 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970968365] [2025-04-14 00:49:46,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:49:46,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:46,639 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:49:46,646 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:49:46,646 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:49:46,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:46,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:46,745 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970968365] [2025-04-14 00:49:46,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970968365] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:46,745 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788465985] [2025-04-14 00:49:46,746 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:49:46,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:46,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:46,747 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:46,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-14 00:49:46,781 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 19 statements into 2 equivalence classes. [2025-04-14 00:49:46,792 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 19 statements. [2025-04-14 00:49:46,793 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:49:46,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:46,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-14 00:49:46,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:46,813 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:46,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788465985] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:46,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:46,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2025-04-14 00:49:46,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149004023] [2025-04-14 00:49:46,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:46,851 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-04-14 00:49:46,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:46,851 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-04-14 00:49:46,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2025-04-14 00:49:46,851 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:46,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 127 transitions, 1892 flow. Second operand has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:46,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:46,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:46,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:47,089 INFO L116 PetriNetUnfolderBase]: 1325/1891 cut-off events. [2025-04-14 00:49:47,089 INFO L117 PetriNetUnfolderBase]: For 20129/20129 co-relation queries the response was YES. [2025-04-14 00:49:47,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13136 conditions, 1891 events. 1325/1891 cut-off events. For 20129/20129 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7570 event pairs, 300 based on Foata normal form. 45/1936 useless extension candidates. Maximal degree in co-relation 12576. Up to 1217 conditions per place. [2025-04-14 00:49:47,101 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 112 selfloop transitions, 77 changer transitions 1/190 dead transitions. [2025-04-14 00:49:47,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 190 transitions, 3078 flow [2025-04-14 00:49:47,102 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 00:49:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 00:49:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2025-04-14 00:49:47,102 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2025-04-14 00:49:47,102 INFO L175 Difference]: Start difference. First operand has 75 places, 127 transitions, 1892 flow. Second operand 7 states and 83 transitions. [2025-04-14 00:49:47,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 190 transitions, 3078 flow [2025-04-14 00:49:47,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 190 transitions, 2906 flow, removed 86 selfloop flow, removed 0 redundant places. [2025-04-14 00:49:47,128 INFO L231 Difference]: Finished difference. Result has 85 places, 152 transitions, 2431 flow [2025-04-14 00:49:47,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2431, PETRI_PLACES=85, PETRI_TRANSITIONS=152} [2025-04-14 00:49:47,128 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2025-04-14 00:49:47,128 INFO L485 AbstractCegarLoop]: Abstraction has has 85 places, 152 transitions, 2431 flow [2025-04-14 00:49:47,129 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.222222222222222) internal successors, (56), 9 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:47,129 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:47,129 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:47,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-14 00:49:47,329 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:47,329 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:47,330 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:47,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1390102500, now seen corresponding path program 1 times [2025-04-14 00:49:47,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:47,330 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050227331] [2025-04-14 00:49:47,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:47,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:47,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:49:47,337 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:47,337 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:47,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:47,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:47,452 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050227331] [2025-04-14 00:49:47,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050227331] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:47,452 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222808331] [2025-04-14 00:49:47,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:49:47,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:47,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:47,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:47,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-14 00:49:47,485 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-04-14 00:49:47,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:47,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:47,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:47,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:49:47,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:47,635 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:48,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:48,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222808331] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:48,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:48,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2025-04-14 00:49:48,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894147871] [2025-04-14 00:49:48,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:48,088 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:49:48,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:48,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:49:48,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:49:48,089 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:48,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 152 transitions, 2431 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:48,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:48,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:48,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:48,477 INFO L116 PetriNetUnfolderBase]: 1904/2730 cut-off events. [2025-04-14 00:49:48,477 INFO L117 PetriNetUnfolderBase]: For 27324/27324 co-relation queries the response was YES. [2025-04-14 00:49:48,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18985 conditions, 2730 events. 1904/2730 cut-off events. For 27324/27324 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11665 event pairs, 200 based on Foata normal form. 2/2732 useless extension candidates. Maximal degree in co-relation 18295. Up to 2028 conditions per place. [2025-04-14 00:49:48,492 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 186 selfloop transitions, 73 changer transitions 2/261 dead transitions. [2025-04-14 00:49:48,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 261 transitions, 4057 flow [2025-04-14 00:49:48,493 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:49:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:49:48,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 125 transitions. [2025-04-14 00:49:48,493 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2025-04-14 00:49:48,493 INFO L175 Difference]: Start difference. First operand has 85 places, 152 transitions, 2431 flow. Second operand 9 states and 125 transitions. [2025-04-14 00:49:48,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 261 transitions, 4057 flow [2025-04-14 00:49:48,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 261 transitions, 3746 flow, removed 104 selfloop flow, removed 5 redundant places. [2025-04-14 00:49:48,535 INFO L231 Difference]: Finished difference. Result has 91 places, 199 transitions, 3175 flow [2025-04-14 00:49:48,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3175, PETRI_PLACES=91, PETRI_TRANSITIONS=199} [2025-04-14 00:49:48,535 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 64 predicate places. [2025-04-14 00:49:48,535 INFO L485 AbstractCegarLoop]: Abstraction has has 91 places, 199 transitions, 3175 flow [2025-04-14 00:49:48,535 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:48,535 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:48,535 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:48,541 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-14 00:49:48,736 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:48,736 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:48,737 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:48,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1391890794, now seen corresponding path program 2 times [2025-04-14 00:49:48,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:48,737 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199184681] [2025-04-14 00:49:48,737 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:48,740 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:48,745 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:48,745 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:48,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:48,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:48,848 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199184681] [2025-04-14 00:49:48,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199184681] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:48,848 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828550857] [2025-04-14 00:49:48,848 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:48,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:48,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:48,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:48,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-14 00:49:48,880 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:48,894 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:48,894 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:48,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:48,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:49:48,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:48,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:49,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828550857] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:49,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:49,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2025-04-14 00:49:49,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086989820] [2025-04-14 00:49:49,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:49,337 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:49:49,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:49,338 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:49:49,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:49:49,338 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:49,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 199 transitions, 3175 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:49,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:49,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:49,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:49,779 INFO L116 PetriNetUnfolderBase]: 2214/3178 cut-off events. [2025-04-14 00:49:49,779 INFO L117 PetriNetUnfolderBase]: For 31408/31408 co-relation queries the response was YES. [2025-04-14 00:49:49,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22241 conditions, 3178 events. 2214/3178 cut-off events. For 31408/31408 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 13852 event pairs, 321 based on Foata normal form. 2/3180 useless extension candidates. Maximal degree in co-relation 21650. Up to 2549 conditions per place. [2025-04-14 00:49:49,800 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 206 selfloop transitions, 68 changer transitions 2/276 dead transitions. [2025-04-14 00:49:49,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 276 transitions, 4347 flow [2025-04-14 00:49:49,804 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:49:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:49:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2025-04-14 00:49:49,805 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2025-04-14 00:49:49,805 INFO L175 Difference]: Start difference. First operand has 91 places, 199 transitions, 3175 flow. Second operand 9 states and 122 transitions. [2025-04-14 00:49:49,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 276 transitions, 4347 flow [2025-04-14 00:49:49,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 276 transitions, 4051 flow, removed 135 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:49,863 INFO L231 Difference]: Finished difference. Result has 101 places, 219 transitions, 3382 flow [2025-04-14 00:49:49,863 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3382, PETRI_PLACES=101, PETRI_TRANSITIONS=219} [2025-04-14 00:49:49,863 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 74 predicate places. [2025-04-14 00:49:49,863 INFO L485 AbstractCegarLoop]: Abstraction has has 101 places, 219 transitions, 3382 flow [2025-04-14 00:49:49,864 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:49,864 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:49,864 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:49,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-14 00:49:50,064 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-04-14 00:49:50,064 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:50,065 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash -213326978, now seen corresponding path program 3 times [2025-04-14 00:49:50,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:50,065 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124776427] [2025-04-14 00:49:50,065 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:49:50,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:50,068 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:50,073 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:50,074 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:49:50,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:50,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:50,201 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124776427] [2025-04-14 00:49:50,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124776427] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:50,202 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870323372] [2025-04-14 00:49:50,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:49:50,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:50,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:50,204 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:50,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-14 00:49:50,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:50,259 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:50,260 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:49:50,260 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:50,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:49:50,261 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:50,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:50,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:50,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:50,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870323372] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:50,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:50,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2025-04-14 00:49:50,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899283620] [2025-04-14 00:49:50,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:50,762 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:49:50,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:50,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:49:50,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:49:50,763 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:50,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 219 transitions, 3382 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:50,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:50,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:50,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:51,270 INFO L116 PetriNetUnfolderBase]: 2725/3920 cut-off events. [2025-04-14 00:49:51,271 INFO L117 PetriNetUnfolderBase]: For 39308/39308 co-relation queries the response was YES. [2025-04-14 00:49:51,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26894 conditions, 3920 events. 2725/3920 cut-off events. For 39308/39308 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 17776 event pairs, 468 based on Foata normal form. 2/3922 useless extension candidates. Maximal degree in co-relation 26439. Up to 3292 conditions per place. [2025-04-14 00:49:51,306 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 246 selfloop transitions, 74 changer transitions 2/322 dead transitions. [2025-04-14 00:49:51,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 322 transitions, 5137 flow [2025-04-14 00:49:51,308 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:49:51,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:49:51,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2025-04-14 00:49:51,308 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2025-04-14 00:49:51,309 INFO L175 Difference]: Start difference. First operand has 101 places, 219 transitions, 3382 flow. Second operand 9 states and 122 transitions. [2025-04-14 00:49:51,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 322 transitions, 5137 flow [2025-04-14 00:49:51,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 322 transitions, 4898 flow, removed 91 selfloop flow, removed 2 redundant places. [2025-04-14 00:49:51,381 INFO L231 Difference]: Finished difference. Result has 111 places, 267 transitions, 4229 flow [2025-04-14 00:49:51,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3143, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4229, PETRI_PLACES=111, PETRI_TRANSITIONS=267} [2025-04-14 00:49:51,381 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 84 predicate places. [2025-04-14 00:49:51,382 INFO L485 AbstractCegarLoop]: Abstraction has has 111 places, 267 transitions, 4229 flow [2025-04-14 00:49:51,382 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:51,382 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:51,382 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:51,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-14 00:49:51,582 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-14 00:49:51,582 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:51,583 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:51,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1006108734, now seen corresponding path program 4 times [2025-04-14 00:49:51,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:51,583 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461736686] [2025-04-14 00:49:51,583 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:49:51,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:51,586 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:51,589 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:51,589 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:49:51,589 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:51,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:51,682 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461736686] [2025-04-14 00:49:51,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461736686] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:51,682 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312581641] [2025-04-14 00:49:51,682 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:49:51,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:51,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:51,683 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:51,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-14 00:49:51,707 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:51,720 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:51,720 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:49:51,720 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:51,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:49:51,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:51,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:52,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:52,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312581641] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:52,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:52,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2025-04-14 00:49:52,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599204109] [2025-04-14 00:49:52,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:52,165 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:49:52,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:52,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:49:52,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:49:52,165 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:52,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 267 transitions, 4229 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:52,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:52,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:52,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:52,738 INFO L116 PetriNetUnfolderBase]: 3005/4326 cut-off events. [2025-04-14 00:49:52,739 INFO L117 PetriNetUnfolderBase]: For 44746/44746 co-relation queries the response was YES. [2025-04-14 00:49:52,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29889 conditions, 4326 events. 3005/4326 cut-off events. For 44746/44746 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19945 event pairs, 582 based on Foata normal form. 2/4328 useless extension candidates. Maximal degree in co-relation 29404. Up to 3819 conditions per place. [2025-04-14 00:49:52,773 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 265 selfloop transitions, 67 changer transitions 2/334 dead transitions. [2025-04-14 00:49:52,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 334 transitions, 5535 flow [2025-04-14 00:49:52,775 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:49:52,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:49:52,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2025-04-14 00:49:52,775 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5462962962962963 [2025-04-14 00:49:52,775 INFO L175 Difference]: Start difference. First operand has 111 places, 267 transitions, 4229 flow. Second operand 9 states and 118 transitions. [2025-04-14 00:49:52,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 334 transitions, 5535 flow [2025-04-14 00:49:52,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 334 transitions, 5169 flow, removed 170 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:52,878 INFO L231 Difference]: Finished difference. Result has 121 places, 286 transitions, 4398 flow [2025-04-14 00:49:52,879 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3863, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4398, PETRI_PLACES=121, PETRI_TRANSITIONS=286} [2025-04-14 00:49:52,879 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 94 predicate places. [2025-04-14 00:49:52,879 INFO L485 AbstractCegarLoop]: Abstraction has has 121 places, 286 transitions, 4398 flow [2025-04-14 00:49:52,879 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:52,879 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:52,879 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:52,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-14 00:49:53,080 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-14 00:49:53,080 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:53,081 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:53,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1732068870, now seen corresponding path program 5 times [2025-04-14 00:49:53,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:53,081 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275198746] [2025-04-14 00:49:53,081 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:49:53,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:53,085 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:53,089 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:53,089 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:53,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:53,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:53,224 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275198746] [2025-04-14 00:49:53,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275198746] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:53,224 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897550037] [2025-04-14 00:49:53,225 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:49:53,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:53,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:53,229 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:53,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-14 00:49:53,274 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:53,297 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:53,297 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:53,297 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:53,298 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:49:53,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:53,399 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:53,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:54,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897550037] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:54,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:54,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 10 [2025-04-14 00:49:54,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009942960] [2025-04-14 00:49:54,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:54,287 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 00:49:54,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:54,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 00:49:54,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2025-04-14 00:49:54,288 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:54,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 286 transitions, 4398 flow. Second operand has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:54,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:54,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:54,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:54,861 INFO L116 PetriNetUnfolderBase]: 3389/4873 cut-off events. [2025-04-14 00:49:54,861 INFO L117 PetriNetUnfolderBase]: For 49269/49269 co-relation queries the response was YES. [2025-04-14 00:49:54,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33219 conditions, 4873 events. 3389/4873 cut-off events. For 49269/49269 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23103 event pairs, 724 based on Foata normal form. 1/4874 useless extension candidates. Maximal degree in co-relation 32692. Up to 4404 conditions per place. [2025-04-14 00:49:54,887 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 301 selfloop transitions, 65 changer transitions 1/367 dead transitions. [2025-04-14 00:49:54,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 367 transitions, 6116 flow [2025-04-14 00:49:54,887 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-14 00:49:54,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-14 00:49:54,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 103 transitions. [2025-04-14 00:49:54,888 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2025-04-14 00:49:54,888 INFO L175 Difference]: Start difference. First operand has 121 places, 286 transitions, 4398 flow. Second operand 8 states and 103 transitions. [2025-04-14 00:49:54,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 367 transitions, 6116 flow [2025-04-14 00:49:54,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 367 transitions, 5830 flow, removed 115 selfloop flow, removed 2 redundant places. [2025-04-14 00:49:54,974 INFO L231 Difference]: Finished difference. Result has 129 places, 325 transitions, 5060 flow [2025-04-14 00:49:54,974 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4112, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5060, PETRI_PLACES=129, PETRI_TRANSITIONS=325} [2025-04-14 00:49:54,974 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 102 predicate places. [2025-04-14 00:49:54,974 INFO L485 AbstractCegarLoop]: Abstraction has has 129 places, 325 transitions, 5060 flow [2025-04-14 00:49:54,974 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.0) internal successors, (96), 12 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:54,975 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:54,975 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:54,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-14 00:49:55,175 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-14 00:49:55,175 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:55,176 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:55,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1775247866, now seen corresponding path program 6 times [2025-04-14 00:49:55,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:55,176 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041185107] [2025-04-14 00:49:55,176 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:49:55,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:55,180 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:55,184 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:55,185 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:49:55,185 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:55,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041185107] [2025-04-14 00:49:55,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041185107] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:55,285 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249468181] [2025-04-14 00:49:55,286 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:49:55,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:55,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:55,287 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:55,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-14 00:49:55,314 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-04-14 00:49:55,329 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-04-14 00:49:55,329 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:49:55,329 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:55,330 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:49:55,330 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:55,401 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:56,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249468181] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:56,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:56,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 11 [2025-04-14 00:49:56,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691664264] [2025-04-14 00:49:56,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:56,307 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:49:56,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:56,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:49:56,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:49:56,308 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:56,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 325 transitions, 5060 flow. Second operand has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:56,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:56,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:56,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:56,944 INFO L116 PetriNetUnfolderBase]: 3619/5206 cut-off events. [2025-04-14 00:49:56,945 INFO L117 PetriNetUnfolderBase]: For 53891/53891 co-relation queries the response was YES. [2025-04-14 00:49:56,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35653 conditions, 5206 events. 3619/5206 cut-off events. For 53891/53891 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 24968 event pairs, 825 based on Foata normal form. 1/5207 useless extension candidates. Maximal degree in co-relation 35107. Up to 4781 conditions per place. [2025-04-14 00:49:56,983 INFO L140 encePairwiseOnDemand]: 19/24 looper letters, 317 selfloop transitions, 63 changer transitions 1/381 dead transitions. [2025-04-14 00:49:56,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 381 transitions, 6443 flow [2025-04-14 00:49:56,984 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-14 00:49:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-14 00:49:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2025-04-14 00:49:56,985 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.53125 [2025-04-14 00:49:56,985 INFO L175 Difference]: Start difference. First operand has 129 places, 325 transitions, 5060 flow. Second operand 8 states and 102 transitions. [2025-04-14 00:49:56,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 381 transitions, 6443 flow [2025-04-14 00:49:57,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 381 transitions, 6079 flow, removed 169 selfloop flow, removed 1 redundant places. [2025-04-14 00:49:57,109 INFO L231 Difference]: Finished difference. Result has 137 places, 341 transitions, 5220 flow [2025-04-14 00:49:57,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4696, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5220, PETRI_PLACES=137, PETRI_TRANSITIONS=341} [2025-04-14 00:49:57,109 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 110 predicate places. [2025-04-14 00:49:57,109 INFO L485 AbstractCegarLoop]: Abstraction has has 137 places, 341 transitions, 5220 flow [2025-04-14 00:49:57,109 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.615384615384615) internal successors, (99), 13 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:57,109 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:57,110 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:57,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-14 00:49:57,310 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-14 00:49:57,310 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:57,311 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:57,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1382699765, now seen corresponding path program 7 times [2025-04-14 00:49:57,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:57,311 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762802660] [2025-04-14 00:49:57,311 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:49:57,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:57,313 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 00:49:57,317 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:49:57,317 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:57,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:57,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:57,383 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762802660] [2025-04-14 00:49:57,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762802660] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:57,383 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145510617] [2025-04-14 00:49:57,383 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:49:57,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:57,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:57,385 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:57,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-14 00:49:57,415 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 00:49:57,429 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:49:57,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:57,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:57,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:49:57,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:57,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:57,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145510617] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:57,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:57,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2025-04-14 00:49:57,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191443294] [2025-04-14 00:49:57,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:57,507 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-04-14 00:49:57,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:57,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-04-14 00:49:57,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2025-04-14 00:49:57,508 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:57,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 341 transitions, 5220 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:57,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:57,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:57,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:58,634 INFO L116 PetriNetUnfolderBase]: 5631/7960 cut-off events. [2025-04-14 00:49:58,634 INFO L117 PetriNetUnfolderBase]: For 91286/91286 co-relation queries the response was YES. [2025-04-14 00:49:58,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54520 conditions, 7960 events. 5631/7960 cut-off events. For 91286/91286 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 39049 event pairs, 510 based on Foata normal form. 68/8028 useless extension candidates. Maximal degree in co-relation 53372. Up to 2687 conditions per place. [2025-04-14 00:49:58,684 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 571 selfloop transitions, 185 changer transitions 0/756 dead transitions. [2025-04-14 00:49:58,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 756 transitions, 12259 flow [2025-04-14 00:49:58,685 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-14 00:49:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-14 00:49:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 178 transitions. [2025-04-14 00:49:58,685 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5705128205128205 [2025-04-14 00:49:58,685 INFO L175 Difference]: Start difference. First operand has 137 places, 341 transitions, 5220 flow. Second operand 13 states and 178 transitions. [2025-04-14 00:49:58,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 756 transitions, 12259 flow [2025-04-14 00:49:58,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 756 transitions, 11368 flow, removed 417 selfloop flow, removed 2 redundant places. [2025-04-14 00:49:58,882 INFO L231 Difference]: Finished difference. Result has 155 places, 442 transitions, 6796 flow [2025-04-14 00:49:58,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4917, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6796, PETRI_PLACES=155, PETRI_TRANSITIONS=442} [2025-04-14 00:49:58,882 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 128 predicate places. [2025-04-14 00:49:58,882 INFO L485 AbstractCegarLoop]: Abstraction has has 155 places, 442 transitions, 6796 flow [2025-04-14 00:49:58,883 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:58,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:58,883 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:58,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-04-14 00:49:59,087 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-04-14 00:49:59,087 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:49:59,087 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:59,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1129453464, now seen corresponding path program 8 times [2025-04-14 00:49:59,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:59,087 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722216764] [2025-04-14 00:49:59,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:59,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:59,090 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:49:59,093 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:49:59,094 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:59,094 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:59,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:59,144 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722216764] [2025-04-14 00:49:59,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722216764] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:59,144 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137680490] [2025-04-14 00:49:59,144 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:59,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:59,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:59,151 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:59,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-14 00:49:59,181 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:49:59,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:49:59,196 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:59,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:59,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:49:59,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:59,229 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:49:59,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137680490] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:59,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:59,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-14 00:49:59,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973883979] [2025-04-14 00:49:59,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:59,284 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:49:59,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:59,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:49:59,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:49:59,284 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:49:59,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 442 transitions, 6796 flow. Second operand has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:59,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:59,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:49:59,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:50:00,741 INFO L116 PetriNetUnfolderBase]: 6622/9225 cut-off events. [2025-04-14 00:50:00,741 INFO L117 PetriNetUnfolderBase]: For 132611/132611 co-relation queries the response was YES. [2025-04-14 00:50:00,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70137 conditions, 9225 events. 6622/9225 cut-off events. For 132611/132611 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 44643 event pairs, 1505 based on Foata normal form. 108/9333 useless extension candidates. Maximal degree in co-relation 68687. Up to 6464 conditions per place. [2025-04-14 00:50:00,833 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 526 selfloop transitions, 306 changer transitions 0/832 dead transitions. [2025-04-14 00:50:00,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 832 transitions, 13786 flow [2025-04-14 00:50:00,834 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 00:50:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 00:50:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 231 transitions. [2025-04-14 00:50:00,835 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5347222222222222 [2025-04-14 00:50:00,835 INFO L175 Difference]: Start difference. First operand has 155 places, 442 transitions, 6796 flow. Second operand 18 states and 231 transitions. [2025-04-14 00:50:00,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 832 transitions, 13786 flow [2025-04-14 00:50:01,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 832 transitions, 13123 flow, removed 295 selfloop flow, removed 1 redundant places. [2025-04-14 00:50:01,264 INFO L231 Difference]: Finished difference. Result has 178 places, 604 transitions, 9580 flow [2025-04-14 00:50:01,264 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6361, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9580, PETRI_PLACES=178, PETRI_TRANSITIONS=604} [2025-04-14 00:50:01,265 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 151 predicate places. [2025-04-14 00:50:01,265 INFO L485 AbstractCegarLoop]: Abstraction has has 178 places, 604 transitions, 9580 flow [2025-04-14 00:50:01,265 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.384615384615385) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:01,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:50:01,265 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:50:01,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-14 00:50:01,465 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:01,466 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:50:01,466 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:50:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1535131829, now seen corresponding path program 9 times [2025-04-14 00:50:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:50:01,466 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858182247] [2025-04-14 00:50:01,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:50:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:50:01,469 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:01,472 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:01,472 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:50:01,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:01,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:50:01,521 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858182247] [2025-04-14 00:50:01,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858182247] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:50:01,521 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165758892] [2025-04-14 00:50:01,521 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:50:01,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:01,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:50:01,525 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:50:01,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-14 00:50:01,553 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:01,565 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:01,565 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:50:01,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:01,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:50:01,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:50:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:01,595 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:50:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:01,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165758892] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:50:01,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:50:01,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-14 00:50:01,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749111119] [2025-04-14 00:50:01,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:50:01,643 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:50:01,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:50:01,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:50:01,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:50:01,644 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:50:01,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 604 transitions, 9580 flow. Second operand has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:01,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:50:01,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:50:01,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:50:03,390 INFO L116 PetriNetUnfolderBase]: 8105/11168 cut-off events. [2025-04-14 00:50:03,390 INFO L117 PetriNetUnfolderBase]: For 179737/179737 co-relation queries the response was YES. [2025-04-14 00:50:03,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88816 conditions, 11168 events. 8105/11168 cut-off events. For 179737/179737 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 54587 event pairs, 1528 based on Foata normal form. 194/11362 useless extension candidates. Maximal degree in co-relation 86978. Up to 7209 conditions per place. [2025-04-14 00:50:03,478 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 689 selfloop transitions, 356 changer transitions 0/1045 dead transitions. [2025-04-14 00:50:03,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 1045 transitions, 18984 flow [2025-04-14 00:50:03,479 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-14 00:50:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-14 00:50:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 165 transitions. [2025-04-14 00:50:03,479 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2025-04-14 00:50:03,479 INFO L175 Difference]: Start difference. First operand has 178 places, 604 transitions, 9580 flow. Second operand 14 states and 165 transitions. [2025-04-14 00:50:03,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 1045 transitions, 18984 flow [2025-04-14 00:50:04,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 1045 transitions, 17664 flow, removed 494 selfloop flow, removed 3 redundant places. [2025-04-14 00:50:04,427 INFO L231 Difference]: Finished difference. Result has 196 places, 792 transitions, 13020 flow [2025-04-14 00:50:04,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=8986, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=13020, PETRI_PLACES=196, PETRI_TRANSITIONS=792} [2025-04-14 00:50:04,427 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 169 predicate places. [2025-04-14 00:50:04,427 INFO L485 AbstractCegarLoop]: Abstraction has has 196 places, 792 transitions, 13020 flow [2025-04-14 00:50:04,427 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.615384615384615) internal successors, (73), 13 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:04,427 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:50:04,428 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:50:04,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-04-14 00:50:04,628 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:04,628 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:50:04,628 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:50:04,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1180989241, now seen corresponding path program 10 times [2025-04-14 00:50:04,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:50:04,629 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357954811] [2025-04-14 00:50:04,629 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:50:04,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:50:04,631 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:04,635 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:04,635 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:50:04,635 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:50:04,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:50:04,726 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357954811] [2025-04-14 00:50:04,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357954811] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:50:04,726 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332214905] [2025-04-14 00:50:04,726 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:50:04,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:04,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:50:04,728 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:50:04,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-14 00:50:04,755 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:04,767 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:04,767 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:50:04,767 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:04,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:50:04,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:50:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:04,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:50:04,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:04,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332214905] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:50:04,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:50:04,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2025-04-14 00:50:04,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057783435] [2025-04-14 00:50:04,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:50:04,889 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 00:50:04,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:50:04,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 00:50:04,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2025-04-14 00:50:04,889 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:50:04,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 792 transitions, 13020 flow. Second operand has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:04,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:50:04,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:50:04,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:50:10,496 INFO L116 PetriNetUnfolderBase]: 10891/14881 cut-off events. [2025-04-14 00:50:10,496 INFO L117 PetriNetUnfolderBase]: For 315559/315559 co-relation queries the response was YES. [2025-04-14 00:50:10,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134710 conditions, 14881 events. 10891/14881 cut-off events. For 315559/315559 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 74839 event pairs, 986 based on Foata normal form. 638/15519 useless extension candidates. Maximal degree in co-relation 132557. Up to 5984 conditions per place. [2025-04-14 00:50:10,640 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 797 selfloop transitions, 1381 changer transitions 1/2179 dead transitions. [2025-04-14 00:50:10,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 2179 transitions, 41405 flow [2025-04-14 00:50:10,641 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2025-04-14 00:50:10,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2025-04-14 00:50:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 1105 transitions. [2025-04-14 00:50:10,645 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4147897897897898 [2025-04-14 00:50:10,645 INFO L175 Difference]: Start difference. First operand has 196 places, 792 transitions, 13020 flow. Second operand 111 states and 1105 transitions. [2025-04-14 00:50:10,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 2179 transitions, 41405 flow [2025-04-14 00:50:12,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 2179 transitions, 40559 flow, removed 423 selfloop flow, removed 0 redundant places. [2025-04-14 00:50:12,058 INFO L231 Difference]: Finished difference. Result has 378 places, 1699 transitions, 35655 flow [2025-04-14 00:50:12,059 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=12567, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=538, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=35655, PETRI_PLACES=378, PETRI_TRANSITIONS=1699} [2025-04-14 00:50:12,059 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 351 predicate places. [2025-04-14 00:50:12,059 INFO L485 AbstractCegarLoop]: Abstraction has has 378 places, 1699 transitions, 35655 flow [2025-04-14 00:50:12,059 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.352941176470588) internal successors, (91), 17 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:12,059 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:50:12,059 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:50:12,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-04-14 00:50:12,261 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:12,261 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:50:12,261 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:50:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1030249061, now seen corresponding path program 11 times [2025-04-14 00:50:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:50:12,261 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879363858] [2025-04-14 00:50:12,262 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:50:12,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:50:12,264 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:12,268 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:12,268 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:50:12,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:12,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:50:12,327 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879363858] [2025-04-14 00:50:12,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879363858] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:50:12,327 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643406792] [2025-04-14 00:50:12,327 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:50:12,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:12,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:50:12,329 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:50:12,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-04-14 00:50:12,358 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:12,370 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:12,370 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:50:12,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:12,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 00:50:12,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:50:12,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:50:12,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:50:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643406792] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:50:12,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:50:12,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2025-04-14 00:50:12,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138365402] [2025-04-14 00:50:12,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:50:12,478 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:50:12,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:50:12,478 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:50:12,479 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2025-04-14 00:50:12,479 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:50:12,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1699 transitions, 35655 flow. Second operand has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:12,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:50:12,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:50:12,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:50:17,920 INFO L116 PetriNetUnfolderBase]: 10947/15213 cut-off events. [2025-04-14 00:50:17,921 INFO L117 PetriNetUnfolderBase]: For 645571/645571 co-relation queries the response was YES. [2025-04-14 00:50:18,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166156 conditions, 15213 events. 10947/15213 cut-off events. For 645571/645571 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 80378 event pairs, 1037 based on Foata normal form. 523/15736 useless extension candidates. Maximal degree in co-relation 165639. Up to 6004 conditions per place. [2025-04-14 00:50:18,284 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 973 selfloop transitions, 850 changer transitions 243/2066 dead transitions. [2025-04-14 00:50:18,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 2066 transitions, 46404 flow [2025-04-14 00:50:18,284 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-14 00:50:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-14 00:50:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 366 transitions. [2025-04-14 00:50:18,285 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2025-04-14 00:50:18,285 INFO L175 Difference]: Start difference. First operand has 378 places, 1699 transitions, 35655 flow. Second operand 34 states and 366 transitions. [2025-04-14 00:50:18,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 2066 transitions, 46404 flow [2025-04-14 00:50:24,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 2066 transitions, 37799 flow, removed 3961 selfloop flow, removed 11 redundant places. [2025-04-14 00:50:24,056 INFO L231 Difference]: Finished difference. Result has 418 places, 1627 transitions, 29374 flow [2025-04-14 00:50:24,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=26450, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=742, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=846, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=29374, PETRI_PLACES=418, PETRI_TRANSITIONS=1627} [2025-04-14 00:50:24,057 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 391 predicate places. [2025-04-14 00:50:24,057 INFO L485 AbstractCegarLoop]: Abstraction has has 418 places, 1627 transitions, 29374 flow [2025-04-14 00:50:24,057 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.6875) internal successors, (91), 16 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:24,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:50:24,057 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:50:24,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-04-14 00:50:24,261 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:24,261 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:50:24,261 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:50:24,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2020819571, now seen corresponding path program 12 times [2025-04-14 00:50:24,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:50:24,261 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886039669] [2025-04-14 00:50:24,261 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:50:24,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:50:24,264 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:24,268 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:24,268 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:50:24,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:24,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:50:24,384 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886039669] [2025-04-14 00:50:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886039669] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:50:24,384 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030972117] [2025-04-14 00:50:24,384 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:50:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:50:24,386 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:50:24,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-04-14 00:50:24,415 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:24,427 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:24,427 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:50:24,427 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:24,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:50:24,428 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:50:24,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:24,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:50:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:24,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030972117] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:50:24,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:50:24,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2025-04-14 00:50:24,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591451034] [2025-04-14 00:50:24,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:50:24,530 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 00:50:24,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:50:24,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 00:50:24,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2025-04-14 00:50:24,530 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:50:24,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1627 transitions, 29374 flow. Second operand has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:24,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:50:24,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:50:24,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:50:29,659 INFO L116 PetriNetUnfolderBase]: 11343/15676 cut-off events. [2025-04-14 00:50:29,659 INFO L117 PetriNetUnfolderBase]: For 893999/893999 co-relation queries the response was YES. [2025-04-14 00:50:29,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173432 conditions, 15676 events. 11343/15676 cut-off events. For 893999/893999 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 82210 event pairs, 875 based on Foata normal form. 211/15887 useless extension candidates. Maximal degree in co-relation 172949. Up to 5234 conditions per place. [2025-04-14 00:50:29,883 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 1349 selfloop transitions, 901 changer transitions 0/2250 dead transitions. [2025-04-14 00:50:29,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 2250 transitions, 46283 flow [2025-04-14 00:50:29,884 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 00:50:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 00:50:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 286 transitions. [2025-04-14 00:50:29,888 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2025-04-14 00:50:29,888 INFO L175 Difference]: Start difference. First operand has 418 places, 1627 transitions, 29374 flow. Second operand 23 states and 286 transitions. [2025-04-14 00:50:29,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 2250 transitions, 46283 flow [2025-04-14 00:50:36,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 2250 transitions, 44451 flow, removed 623 selfloop flow, removed 9 redundant places. [2025-04-14 00:50:36,578 INFO L231 Difference]: Finished difference. Result has 433 places, 1817 transitions, 34216 flow [2025-04-14 00:50:36,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=27882, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=34216, PETRI_PLACES=433, PETRI_TRANSITIONS=1817} [2025-04-14 00:50:36,579 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 406 predicate places. [2025-04-14 00:50:36,579 INFO L485 AbstractCegarLoop]: Abstraction has has 433 places, 1817 transitions, 34216 flow [2025-04-14 00:50:36,579 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.4) internal successors, (81), 15 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:36,579 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:50:36,579 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:50:36,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-04-14 00:50:36,784 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:36,784 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:50:36,784 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:50:36,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1924285510, now seen corresponding path program 13 times [2025-04-14 00:50:36,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:50:36,785 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493961984] [2025-04-14 00:50:36,785 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:50:36,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:50:36,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 00:50:36,792 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:36,792 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:50:36,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:36,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:50:36,842 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493961984] [2025-04-14 00:50:36,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493961984] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:50:36,842 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862073723] [2025-04-14 00:50:36,842 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:50:36,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:36,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:50:36,844 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:50:36,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-04-14 00:50:36,871 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 00:50:36,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:36,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:50:36,881 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:36,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:50:36,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:50:36,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:36,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:50:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:36,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862073723] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:50:36,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:50:36,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-04-14 00:50:36,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264537385] [2025-04-14 00:50:36,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:50:36,986 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:50:36,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:50:36,986 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:50:36,987 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2025-04-14 00:50:36,987 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:50:36,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1817 transitions, 34216 flow. Second operand has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:36,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:50:36,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:50:36,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:50:44,094 INFO L116 PetriNetUnfolderBase]: 13034/17916 cut-off events. [2025-04-14 00:50:44,094 INFO L117 PetriNetUnfolderBase]: For 1101236/1101236 co-relation queries the response was YES. [2025-04-14 00:50:44,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209329 conditions, 17916 events. 13034/17916 cut-off events. For 1101236/1101236 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 94807 event pairs, 871 based on Foata normal form. 320/18236 useless extension candidates. Maximal degree in co-relation 208710. Up to 6086 conditions per place. [2025-04-14 00:50:44,388 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 1821 selfloop transitions, 1146 changer transitions 7/2974 dead transitions. [2025-04-14 00:50:44,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 2974 transitions, 64889 flow [2025-04-14 00:50:44,388 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2025-04-14 00:50:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2025-04-14 00:50:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 629 transitions. [2025-04-14 00:50:44,390 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.416005291005291 [2025-04-14 00:50:44,390 INFO L175 Difference]: Start difference. First operand has 433 places, 1817 transitions, 34216 flow. Second operand 63 states and 629 transitions. [2025-04-14 00:50:44,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 2974 transitions, 64889 flow [2025-04-14 00:50:53,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 2974 transitions, 63159 flow, removed 537 selfloop flow, removed 4 redundant places. [2025-04-14 00:50:53,429 INFO L231 Difference]: Finished difference. Result has 534 places, 2294 transitions, 48069 flow [2025-04-14 00:50:53,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=32653, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=707, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1005, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=48069, PETRI_PLACES=534, PETRI_TRANSITIONS=2294} [2025-04-14 00:50:53,431 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 507 predicate places. [2025-04-14 00:50:53,431 INFO L485 AbstractCegarLoop]: Abstraction has has 534 places, 2294 transitions, 48069 flow [2025-04-14 00:50:53,431 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:53,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:50:53,431 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:50:53,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-04-14 00:50:53,631 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:53,632 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:50:53,632 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:50:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 924296159, now seen corresponding path program 14 times [2025-04-14 00:50:53,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:50:53,633 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333591856] [2025-04-14 00:50:53,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:50:53,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:50:53,636 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:53,642 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:53,642 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:50:53,642 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:53,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:53,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:50:53,750 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333591856] [2025-04-14 00:50:53,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333591856] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:50:53,751 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663395817] [2025-04-14 00:50:53,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:50:53,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:50:53,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:50:53,753 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:50:53,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-04-14 00:50:53,785 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:50:53,797 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:50:53,797 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:50:53,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:50:53,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:50:53,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:50:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:53,844 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:50:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:50:53,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663395817] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:50:53,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:50:53,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2025-04-14 00:50:53,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423871804] [2025-04-14 00:50:53,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:50:53,906 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:50:53,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:50:53,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:50:53,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:50:53,906 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:50:53,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 2294 transitions, 48069 flow. Second operand has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:50:53,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:50:53,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:50:53,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:51:07,546 INFO L116 PetriNetUnfolderBase]: 23413/31816 cut-off events. [2025-04-14 00:51:07,546 INFO L117 PetriNetUnfolderBase]: For 2257192/2257192 co-relation queries the response was YES. [2025-04-14 00:51:08,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445945 conditions, 31816 events. 23413/31816 cut-off events. For 2257192/2257192 co-relation queries the response was YES. Maximal size of possible extension queue 1404. Compared 175630 event pairs, 785 based on Foata normal form. 182/31998 useless extension candidates. Maximal degree in co-relation 444945. Up to 12727 conditions per place. [2025-04-14 00:51:08,475 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 4234 selfloop transitions, 1240 changer transitions 165/5639 dead transitions. [2025-04-14 00:51:08,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 5639 transitions, 140001 flow [2025-04-14 00:51:08,476 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 00:51:08,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 00:51:08,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 228 transitions. [2025-04-14 00:51:08,476 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-14 00:51:08,476 INFO L175 Difference]: Start difference. First operand has 534 places, 2294 transitions, 48069 flow. Second operand 19 states and 228 transitions. [2025-04-14 00:51:08,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 5639 transitions, 140001 flow [2025-04-14 00:51:26,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 5639 transitions, 132435 flow, removed 2705 selfloop flow, removed 16 redundant places. [2025-04-14 00:51:26,568 INFO L231 Difference]: Finished difference. Result has 550 places, 3007 transitions, 64377 flow [2025-04-14 00:51:26,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=43905, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=64377, PETRI_PLACES=550, PETRI_TRANSITIONS=3007} [2025-04-14 00:51:26,570 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 523 predicate places. [2025-04-14 00:51:26,570 INFO L485 AbstractCegarLoop]: Abstraction has has 550 places, 3007 transitions, 64377 flow [2025-04-14 00:51:26,570 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.6923076923076925) internal successors, (74), 13 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:51:26,570 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:51:26,571 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:51:26,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-04-14 00:51:26,771 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-04-14 00:51:26,771 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:51:26,772 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:51:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash 2080766267, now seen corresponding path program 15 times [2025-04-14 00:51:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:51:26,772 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427006144] [2025-04-14 00:51:26,772 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:51:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:51:26,774 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:51:26,779 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:51:26,779 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:51:26,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:51:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:51:26,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:51:26,877 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427006144] [2025-04-14 00:51:26,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427006144] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:51:26,877 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218515093] [2025-04-14 00:51:26,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:51:26,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:51:26,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:51:26,880 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:51:26,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-04-14 00:51:26,908 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:51:26,919 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:51:26,919 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:51:26,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:51:26,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:51:26,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:51:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:51:26,959 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:51:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:51:27,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218515093] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:51:27,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:51:27,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2025-04-14 00:51:27,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389406210] [2025-04-14 00:51:27,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:51:27,029 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 00:51:27,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:51:27,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 00:51:27,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2025-04-14 00:51:27,030 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:51:27,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 3007 transitions, 64377 flow. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:51:27,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:51:27,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:51:27,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:51:47,456 INFO L116 PetriNetUnfolderBase]: 27099/36911 cut-off events. [2025-04-14 00:51:47,457 INFO L117 PetriNetUnfolderBase]: For 3625897/3625897 co-relation queries the response was YES. [2025-04-14 00:51:48,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549684 conditions, 36911 events. 27099/36911 cut-off events. For 3625897/3625897 co-relation queries the response was YES. Maximal size of possible extension queue 1605. Compared 210887 event pairs, 4103 based on Foata normal form. 347/37258 useless extension candidates. Maximal degree in co-relation 548885. Up to 21485 conditions per place. [2025-04-14 00:51:48,588 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 3028 selfloop transitions, 1129 changer transitions 6/4163 dead transitions. [2025-04-14 00:51:48,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 4163 transitions, 109822 flow [2025-04-14 00:51:48,589 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 00:51:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 00:51:48,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 250 transitions. [2025-04-14 00:51:48,590 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2025-04-14 00:51:48,590 INFO L175 Difference]: Start difference. First operand has 550 places, 3007 transitions, 64377 flow. Second operand 20 states and 250 transitions. [2025-04-14 00:51:48,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 4163 transitions, 109822 flow [2025-04-14 00:52:20,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 4163 transitions, 99332 flow, removed 5245 selfloop flow, removed 0 redundant places. [2025-04-14 00:52:20,309 INFO L231 Difference]: Finished difference. Result has 581 places, 3377 transitions, 74879 flow [2025-04-14 00:52:20,311 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=61095, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=818, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2019, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=74879, PETRI_PLACES=581, PETRI_TRANSITIONS=3377} [2025-04-14 00:52:20,311 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 554 predicate places. [2025-04-14 00:52:20,312 INFO L485 AbstractCegarLoop]: Abstraction has has 581 places, 3377 transitions, 74879 flow [2025-04-14 00:52:20,312 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 14 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:20,312 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:20,312 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:20,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-04-14 00:52:20,512 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-04-14 00:52:20,512 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:52:20,513 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:20,513 INFO L85 PathProgramCache]: Analyzing trace with hash 369839135, now seen corresponding path program 16 times [2025-04-14 00:52:20,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:20,513 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984240118] [2025-04-14 00:52:20,513 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:52:20,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:20,516 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:52:20,525 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:52:20,526 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:52:20,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:52:20,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:20,581 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984240118] [2025-04-14 00:52:20,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984240118] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:20,581 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515909334] [2025-04-14 00:52:20,581 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:52:20,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:20,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:20,583 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:20,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-04-14 00:52:20,616 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:52:20,627 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:52:20,627 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:52:20,627 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:20,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:52:20,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:52:20,678 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:20,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:52:20,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515909334] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:20,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:20,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2025-04-14 00:52:20,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410804137] [2025-04-14 00:52:20,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:20,739 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-04-14 00:52:20,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:20,739 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-04-14 00:52:20,739 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2025-04-14 00:52:20,739 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:52:20,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 3377 transitions, 74879 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:20,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:20,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:52:20,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:54,694 INFO L116 PetriNetUnfolderBase]: 39745/53071 cut-off events. [2025-04-14 00:52:54,694 INFO L117 PetriNetUnfolderBase]: For 3848550/3848550 co-relation queries the response was YES. [2025-04-14 00:52:56,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768245 conditions, 53071 events. 39745/53071 cut-off events. For 3848550/3848550 co-relation queries the response was YES. Maximal size of possible extension queue 2210. Compared 299893 event pairs, 6023 based on Foata normal form. 610/53681 useless extension candidates. Maximal degree in co-relation 767409. Up to 37803 conditions per place. [2025-04-14 00:52:57,338 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 4253 selfloop transitions, 1767 changer transitions 72/6092 dead transitions. [2025-04-14 00:52:57,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 599 places, 6092 transitions, 157976 flow [2025-04-14 00:52:57,339 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 00:52:57,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 00:52:57,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 211 transitions. [2025-04-14 00:52:57,340 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.46271929824561403 [2025-04-14 00:52:57,340 INFO L175 Difference]: Start difference. First operand has 581 places, 3377 transitions, 74879 flow. Second operand 19 states and 211 transitions. [2025-04-14 00:52:57,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 599 places, 6092 transitions, 157976 flow [2025-04-14 00:53:52,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 6092 transitions, 152953 flow, removed 1976 selfloop flow, removed 4 redundant places. [2025-04-14 00:53:52,874 INFO L231 Difference]: Finished difference. Result has 610 places, 4818 transitions, 113840 flow [2025-04-14 00:53:52,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=72458, PETRI_DIFFERENCE_MINUEND_PLACES=577, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=732, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=113840, PETRI_PLACES=610, PETRI_TRANSITIONS=4818} [2025-04-14 00:53:52,877 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 583 predicate places. [2025-04-14 00:53:52,877 INFO L485 AbstractCegarLoop]: Abstraction has has 610 places, 4818 transitions, 113840 flow [2025-04-14 00:53:52,877 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:52,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:52,877 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:52,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-04-14 00:53:53,078 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-04-14 00:53:53,078 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:53:53,079 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:53,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1430937405, now seen corresponding path program 17 times [2025-04-14 00:53:53,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:53,079 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660592918] [2025-04-14 00:53:53,079 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:53:53,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:53,083 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:53:53,089 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:53:53,089 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:53:53,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:53:53,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:53,171 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660592918] [2025-04-14 00:53:53,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660592918] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:53,171 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787184391] [2025-04-14 00:53:53,171 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:53:53,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:53,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:53,173 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:53,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-04-14 00:53:53,208 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:53:53,223 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:53:53,223 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:53:53,223 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:53,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:53:53,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:53,276 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:53:53,276 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:53:53,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787184391] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:53,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:53,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-04-14 00:53:53,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922513640] [2025-04-14 00:53:53,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:53,352 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 00:53:53,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:53,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 00:53:53,353 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2025-04-14 00:53:53,353 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:53:53,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 4818 transitions, 113840 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:53,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:53,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:53:53,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:54:41,953 INFO L116 PetriNetUnfolderBase]: 44620/59858 cut-off events. [2025-04-14 00:54:41,953 INFO L117 PetriNetUnfolderBase]: For 4857402/4857402 co-relation queries the response was YES. [2025-04-14 00:54:44,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 928528 conditions, 59858 events. 44620/59858 cut-off events. For 4857402/4857402 co-relation queries the response was YES. Maximal size of possible extension queue 2590. Compared 348836 event pairs, 3305 based on Foata normal form. 1474/61332 useless extension candidates. Maximal degree in co-relation 927609. Up to 22832 conditions per place. [2025-04-14 00:54:44,669 INFO L140 encePairwiseOnDemand]: 15/24 looper letters, 2602 selfloop transitions, 4484 changer transitions 84/7170 dead transitions. [2025-04-14 00:54:44,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 7170 transitions, 199183 flow [2025-04-14 00:54:44,670 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2025-04-14 00:54:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2025-04-14 00:54:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 720 transitions. [2025-04-14 00:54:44,671 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2025-04-14 00:54:44,671 INFO L175 Difference]: Start difference. First operand has 610 places, 4818 transitions, 113840 flow. Second operand 77 states and 720 transitions. [2025-04-14 00:54:44,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 7170 transitions, 199183 flow [2025-04-14 00:56:10,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 7170 transitions, 188634 flow, removed 5034 selfloop flow, removed 4 redundant places. [2025-04-14 00:56:11,048 INFO L231 Difference]: Finished difference. Result has 716 places, 6412 transitions, 169039 flow [2025-04-14 00:56:11,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=103806, PETRI_DIFFERENCE_MINUEND_PLACES=605, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2749, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=169039, PETRI_PLACES=716, PETRI_TRANSITIONS=6412} [2025-04-14 00:56:11,052 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 689 predicate places. [2025-04-14 00:56:11,052 INFO L485 AbstractCegarLoop]: Abstraction has has 716 places, 6412 transitions, 169039 flow [2025-04-14 00:56:11,052 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:56:11,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:56:11,052 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:56:11,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-04-14 00:56:11,258 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:56:11,258 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 00:56:11,258 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:56:11,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1154905371, now seen corresponding path program 18 times [2025-04-14 00:56:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:56:11,259 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280766454] [2025-04-14 00:56:11,259 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:56:11,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:56:11,262 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:56:11,265 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:56:11,265 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:56:11,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:56:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:56:11,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:56:11,360 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280766454] [2025-04-14 00:56:11,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280766454] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:56:11,360 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958361246] [2025-04-14 00:56:11,360 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:56:11,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:56:11,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:56:11,362 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:56:11,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-04-14 00:56:11,390 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 21 statements into 2 equivalence classes. [2025-04-14 00:56:11,402 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 00:56:11,402 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:56:11,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:56:11,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 00:56:11,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:56:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:56:11,430 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:56:11,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:56:11,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958361246] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:56:11,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:56:11,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2025-04-14 00:56:11,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388813780] [2025-04-14 00:56:11,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:56:11,479 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-14 00:56:11,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:56:11,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-14 00:56:11,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-04-14 00:56:11,480 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 00:56:11,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 716 places, 6412 transitions, 169039 flow. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:56:11,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:56:11,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 00:56:11,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:57:49,943 INFO L116 PetriNetUnfolderBase]: 56664/75769 cut-off events. [2025-04-14 00:57:49,944 INFO L117 PetriNetUnfolderBase]: For 6725301/6725301 co-relation queries the response was YES. [2025-04-14 00:57:54,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273494 conditions, 75769 events. 56664/75769 cut-off events. For 6725301/6725301 co-relation queries the response was YES. Maximal size of possible extension queue 3371. Compared 453237 event pairs, 7462 based on Foata normal form. 926/76695 useless extension candidates. Maximal degree in co-relation 1272540. Up to 49169 conditions per place. [2025-04-14 00:57:54,664 INFO L140 encePairwiseOnDemand]: 17/24 looper letters, 6688 selfloop transitions, 2975 changer transitions 136/9799 dead transitions. [2025-04-14 00:57:54,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 9799 transitions, 296564 flow [2025-04-14 00:57:54,664 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 00:57:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 00:57:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 253 transitions. [2025-04-14 00:57:54,665 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2025-04-14 00:57:54,665 INFO L175 Difference]: Start difference. First operand has 716 places, 6412 transitions, 169039 flow. Second operand 22 states and 253 transitions. [2025-04-14 00:57:54,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 9799 transitions, 296564 flow [2025-04-14 01:01:34,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 9799 transitions, 264508 flow, removed 15421 selfloop flow, removed 7 redundant places. [2025-04-14 01:01:34,954 INFO L231 Difference]: Finished difference. Result has 737 places, 8024 transitions, 210713 flow [2025-04-14 01:01:34,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=148040, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1417, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=210713, PETRI_PLACES=737, PETRI_TRANSITIONS=8024} [2025-04-14 01:01:34,961 INFO L279 CegarLoopForPetriNet]: 27 programPoint places, 710 predicate places. [2025-04-14 01:01:34,961 INFO L485 AbstractCegarLoop]: Abstraction has has 737 places, 8024 transitions, 210713 flow [2025-04-14 01:01:34,961 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:34,961 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:01:34,961 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:01:34,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-04-14 01:01:35,162 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-04-14 01:01:35,162 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2025-04-14 01:01:35,163 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:01:35,164 INFO L85 PathProgramCache]: Analyzing trace with hash 525663065, now seen corresponding path program 19 times [2025-04-14 01:01:35,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:01:35,164 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882037407] [2025-04-14 01:01:35,164 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:01:35,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:01:35,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:01:35,225 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:01:35,225 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:35,226 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:01:35,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:01:35,477 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882037407] [2025-04-14 01:01:35,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882037407] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:01:35,477 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814761106] [2025-04-14 01:01:35,477 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 01:01:35,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:01:35,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:01:35,480 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:01:35,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-04-14 01:01:35,526 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-14 01:01:35,542 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-14 01:01:35,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:01:35,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:01:35,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-14 01:01:35,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:01:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:01:35,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:01:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:01:35,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814761106] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:01:35,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:01:35,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-04-14 01:01:35,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935404996] [2025-04-14 01:01:35,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:01:35,756 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-14 01:01:35,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:01:35,757 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-14 01:01:35,757 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2025-04-14 01:01:35,757 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2025-04-14 01:01:35,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 737 places, 8024 transitions, 210713 flow. Second operand has 17 states, 17 states have (on average 5.882352941176471) internal successors, (100), 17 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:01:35,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:01:35,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2025-04-14 01:01:35,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2025-04-14 01:02:22,375 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:02:22,378 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:02:23,035 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2025-04-14 01:02:23,037 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2025-04-14 01:02:23,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-04-14 01:02:23,237 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:02:23,238 WARN L610 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (17states, 3/24 universal loopers) in iteration 30,while PetriNetUnfolder was constructing finite prefix that currently has 440260 conditions, 30280 events (22293/30279 cut-off events. For 2785359/2785359 co-relation queries the response was YES. Maximal size of possible extension queue 4094. Compared 198000 event pairs, 2854 based on Foata normal form. 410/34775 useless extension candidates. Maximal degree in co-relation 439857. Up to 16144 conditions per place.). [2025-04-14 01:02:23,244 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2025-04-14 01:02:23,244 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2025-04-14 01:02:23,245 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2025-04-14 01:02:23,245 INFO L422 BasicCegarLoop]: Path program histogram: [19, 4, 3, 2, 1, 1] [2025-04-14 01:02:23,254 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 01:02:23,254 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 01:02:23,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 01:02:23 BasicIcfg [2025-04-14 01:02:23,269 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 01:02:23,270 INFO L158 Benchmark]: Toolchain (without parser) took 762631.96ms. Allocated memory was 142.6MB in the beginning and 5.6GB in the end (delta: 5.5GB). Free memory was 98.9MB in the beginning and 3.6GB in the end (delta: -3.5GB). Peak memory consumption was 4.7GB. Max. memory is 8.0GB. [2025-04-14 01:02:23,270 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 163.6MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:02:23,270 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.39ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 84.2MB in the end (delta: 14.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-14 01:02:23,271 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.89ms. Allocated memory is still 142.6MB. Free memory was 84.2MB in the beginning and 82.8MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-14 01:02:23,271 INFO L158 Benchmark]: Boogie Preprocessor took 23.58ms. Allocated memory is still 142.6MB. Free memory was 82.8MB in the beginning and 81.9MB in the end (delta: 917.0kB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:02:23,271 INFO L158 Benchmark]: IcfgBuilder took 468.72ms. Allocated memory is still 142.6MB. Free memory was 81.9MB in the beginning and 54.3MB in the end (delta: 27.5MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. [2025-04-14 01:02:23,276 INFO L158 Benchmark]: TraceAbstraction took 761900.53ms. Allocated memory was 142.6MB in the beginning and 5.6GB in the end (delta: 5.5GB). Free memory was 53.4MB in the beginning and 3.6GB in the end (delta: -3.5GB). Peak memory consumption was 4.6GB. Max. memory is 8.0GB. [2025-04-14 01:02:23,278 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 163.6MB. Free memory is still 89.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 211.39ms. Allocated memory is still 142.6MB. Free memory was 98.9MB in the beginning and 84.2MB in the end (delta: 14.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.89ms. Allocated memory is still 142.6MB. Free memory was 84.2MB in the beginning and 82.8MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.58ms. Allocated memory is still 142.6MB. Free memory was 82.8MB in the beginning and 81.9MB in the end (delta: 917.0kB). There was no memory consumed. Max. memory is 8.0GB. * IcfgBuilder took 468.72ms. Allocated memory is still 142.6MB. Free memory was 81.9MB in the beginning and 54.3MB in the end (delta: 27.5MB). Peak memory consumption was 25.2MB. Max. memory is 8.0GB. * TraceAbstraction took 761900.53ms. Allocated memory was 142.6MB in the beginning and 5.6GB in the end (delta: 5.5GB). Free memory was 53.4MB in the beginning and 3.6GB in the end (delta: -3.5GB). Peak memory consumption was 4.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (17states, 3/24 universal loopers) in iteration 30,while PetriNetUnfolder was constructing finite prefix that currently has 440260 conditions, 30280 events (22293/30279 cut-off events. For 2785359/2785359 co-relation queries the response was YES. Maximal size of possible extension queue 4094. Compared 198000 event pairs, 2854 based on Foata normal form. 410/34775 useless extension candidates. Maximal degree in co-relation 439857. Up to 16144 conditions per place.). - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (17states, 3/24 universal loopers) in iteration 30,while PetriNetUnfolder was constructing finite prefix that currently has 440260 conditions, 30280 events (22293/30279 cut-off events. For 2785359/2785359 co-relation queries the response was YES. Maximal size of possible extension queue 4094. Compared 198000 event pairs, 2854 based on Foata normal form. 410/34775 useless extension candidates. Maximal degree in co-relation 439857. Up to 16144 conditions per place.). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (17states, 3/24 universal loopers) in iteration 30,while PetriNetUnfolder was constructing finite prefix that currently has 440260 conditions, 30280 events (22293/30279 cut-off events. For 2785359/2785359 co-relation queries the response was YES. Maximal size of possible extension queue 4094. Compared 198000 event pairs, 2854 based on Foata normal form. 410/34775 useless extension candidates. Maximal degree in co-relation 439857. Up to 16144 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (17states, 3/24 universal loopers) in iteration 30,while PetriNetUnfolder was constructing finite prefix that currently has 440260 conditions, 30280 events (22293/30279 cut-off events. For 2785359/2785359 co-relation queries the response was YES. Maximal size of possible extension queue 4094. Compared 198000 event pairs, 2854 based on Foata normal form. 410/34775 useless extension candidates. Maximal degree in co-relation 439857. Up to 16144 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 34 locations, 39 edges, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 761.8s, OverallIterations: 30, TraceHistogramMax: 2, PathProgramHistogramMax: 19, EmptinessCheckTime: 0.0s, AutomataDifference: 746.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2717 SdHoareTripleChecker+Valid, 8.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2717 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 299 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17400 IncrementalHoareTripleChecker+Invalid, 17699 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 299 mSolverCounterUnsat, 0 mSDtfsCounter, 17400 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1631 GetRequests, 948 SyntacticMatches, 18 SemanticMatches, 665 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12623 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=210713occurred in iteration=29, InterpolantAutomatonStates: 543, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 8.8s InterpolantComputationTime, 1097 NumberOfCodeBlocks, 1097 NumberOfCodeBlocksAsserted, 94 NumberOfCheckSat, 1521 ConstructedInterpolants, 0 QuantifiedInterpolants, 8070 SizeOfPredicates, 50 NumberOfNonLiveVariables, 3495 ConjunctsInSsa, 258 ConjunctsInUnsatCore, 80 InterpolantComputations, 7 PerfectInterpolantSequences, 66/280 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown