./Ultimate.py --spec ../sv-benchmarks/c/properties/no-data-race.prp --file ../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 22ba795826618dfa50b90a88d5a4c30adee7dfead438325f939eb97a379da897 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 21:38:44,404 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 21:38:44,460 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2025-03-08 21:38:44,466 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 21:38:44,466 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 21:38:44,490 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 21:38:44,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 21:38:44,490 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 21:38:44,491 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 21:38:44,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 21:38:44,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 21:38:44,491 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 21:38:44,491 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 21:38:44,491 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 21:38:44,491 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 21:38:44,491 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 21:38:44,491 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 21:38:44,491 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 21:38:44,492 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 21:38:44,492 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 21:38:44,492 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 21:38:44,493 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 21:38:44,493 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 21:38:44,493 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 21:38:44,493 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 21:38:44,493 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 21:38:44,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 21:38:44,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 21:38:44,493 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22ba795826618dfa50b90a88d5a4c30adee7dfead438325f939eb97a379da897 [2025-03-08 21:38:44,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 21:38:44,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 21:38:44,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 21:38:44,760 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 21:38:44,760 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 21:38:44,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2025-03-08 21:38:45,956 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a835055a3/c9cd80f02f234fd59e9003fce743e379/FLAGc9a68afb5 [2025-03-08 21:38:46,195 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 21:38:46,196 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/35_double_lock_p3_vs.i [2025-03-08 21:38:46,205 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a835055a3/c9cd80f02f234fd59e9003fce743e379/FLAGc9a68afb5 [2025-03-08 21:38:46,216 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a835055a3/c9cd80f02f234fd59e9003fce743e379 [2025-03-08 21:38:46,218 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 21:38:46,219 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 21:38:46,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 21:38:46,220 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 21:38:46,223 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 21:38:46,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,225 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d88aa66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46, skipping insertion in model container [2025-03-08 21:38:46,225 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,243 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 21:38:46,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 21:38:46,424 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 21:38:46,459 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 21:38:46,487 INFO L204 MainTranslator]: Completed translation [2025-03-08 21:38:46,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46 WrapperNode [2025-03-08 21:38:46,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 21:38:46,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 21:38:46,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 21:38:46,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 21:38:46,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,504 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,519 INFO L138 Inliner]: procedures = 164, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 106 [2025-03-08 21:38:46,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 21:38:46,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 21:38:46,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 21:38:46,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 21:38:46,524 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,525 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,532 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,535 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 21:38:46,544 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 21:38:46,547 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 21:38:46,547 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 21:38:46,548 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (1/1) ... [2025-03-08 21:38:46,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 21:38:46,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 21:38:46,575 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) [2025-03-08 21:38:46,577 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 [2025-03-08 21:38:46,594 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2025-03-08 21:38:46,595 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2025-03-08 21:38:46,595 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2025-03-08 21:38:46,596 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2025-03-08 21:38:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2025-03-08 21:38:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 21:38:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-03-08 21:38:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2025-03-08 21:38:46,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 21:38:46,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 21:38:46,597 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 21:38:46,693 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 21:38:46,694 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 21:38:46,853 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 21:38:46,854 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 21:38:46,880 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 21:38:46,881 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 21:38:46,881 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 09:38:46 BoogieIcfgContainer [2025-03-08 21:38:46,881 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 21:38:46,883 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 21:38:46,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 21:38:46,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 21:38:46,886 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 09:38:46" (1/3) ... [2025-03-08 21:38:46,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501637e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 09:38:46, skipping insertion in model container [2025-03-08 21:38:46,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:38:46" (2/3) ... [2025-03-08 21:38:46,887 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@501637e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 09:38:46, skipping insertion in model container [2025-03-08 21:38:46,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 09:38:46" (3/3) ... [2025-03-08 21:38:46,888 INFO L128 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2025-03-08 21:38:46,899 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 21:38:46,901 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG 35_double_lock_p3_vs.i that has 3 procedures, 113 locations, 1 initial locations, 2 loop locations, and 9 error locations. [2025-03-08 21:38:46,901 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 21:38:46,972 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 21:38:46,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 117 transitions, 242 flow [2025-03-08 21:38:47,029 INFO L124 PetriNetUnfolderBase]: 4/123 cut-off events. [2025-03-08 21:38:47,034 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 21:38:47,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 123 events. 4/123 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 155 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 104. Up to 2 conditions per place. [2025-03-08 21:38:47,040 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 117 transitions, 242 flow [2025-03-08 21:38:47,044 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 116 transitions, 239 flow [2025-03-08 21:38:47,053 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 21:38:47,066 INFO L333 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;@58383319, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 21:38:47,066 INFO L334 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2025-03-08 21:38:47,079 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 21:38:47,079 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2025-03-08 21:38:47,079 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 21:38:47,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 21:38:47,080 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 21:38:47,080 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr2Err7ASSERT_VIOLATIONDATA_RACE, thr2Err6ASSERT_VIOLATIONDATA_RACE, thr2Err5ASSERT_VIOLATIONDATA_RACE, thr2Err4ASSERT_VIOLATIONDATA_RACE (and 16 more)] === [2025-03-08 21:38:47,084 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 21:38:47,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1050231938, now seen corresponding path program 1 times [2025-03-08 21:38:47,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 21:38:47,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373251673] [2025-03-08 21:38:47,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 21:38:47,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 21:38:47,160 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 21:38:47,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 21:38:47,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 21:38:47,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 21:38:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 21:38:47,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 21:38:47,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373251673] [2025-03-08 21:38:47,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373251673] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 21:38:47,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 21:38:47,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 21:38:47,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605402816] [2025-03-08 21:38:47,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 21:38:47,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 21:38:47,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 21:38:47,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 21:38:47,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 21:38:47,334 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 117 [2025-03-08 21:38:47,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 116 transitions, 239 flow. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2025-03-08 21:38:47,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 21:38:47,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 117 [2025-03-08 21:38:47,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 21:38:47,514 INFO L124 PetriNetUnfolderBase]: 120/543 cut-off events. [2025-03-08 21:38:47,514 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-08 21:38:47,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 814 conditions, 543 events. 120/543 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2348 event pairs, 37 based on Foata normal form. 179/669 useless extension candidates. Maximal degree in co-relation 786. Up to 176 conditions per place. [2025-03-08 21:38:47,520 INFO L140 encePairwiseOnDemand]: 98/117 looper letters, 26 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2025-03-08 21:38:47,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 114 transitions, 310 flow [2025-03-08 21:38:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 21:38:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 21:38:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 304 transitions. [2025-03-08 21:38:47,534 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.8660968660968661 [2025-03-08 21:38:47,535 INFO L175 Difference]: Start difference. First operand has 118 places, 116 transitions, 239 flow. Second operand 3 states and 304 transitions. [2025-03-08 21:38:47,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 114 transitions, 310 flow [2025-03-08 21:38:47,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 114 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 21:38:47,544 INFO L231 Difference]: Finished difference. Result has 108 places, 107 transitions, 274 flow [2025-03-08 21:38:47,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=117, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=108, PETRI_TRANSITIONS=107} [2025-03-08 21:38:47,550 INFO L279 CegarLoopForPetriNet]: 118 programPoint places, -10 predicate places. [2025-03-08 21:38:47,551 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 107 transitions, 274 flow [2025-03-08 21:38:47,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2025-03-08 21:38:47,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 21:38:47,552 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 21:38:47,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 21:38:47,552 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err7ASSERT_VIOLATIONDATA_RACE, thr2Err6ASSERT_VIOLATIONDATA_RACE, thr2Err5ASSERT_VIOLATIONDATA_RACE, thr2Err4ASSERT_VIOLATIONDATA_RACE (and 16 more)] === [2025-03-08 21:38:47,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 21:38:47,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1978930063, now seen corresponding path program 1 times [2025-03-08 21:38:47,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 21:38:47,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061391356] [2025-03-08 21:38:47,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 21:38:47,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 21:38:47,568 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 21:38:47,581 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 21:38:47,584 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 21:38:47,584 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 21:38:47,584 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 21:38:47,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-08 21:38:47,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-08 21:38:47,598 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 21:38:47,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 21:38:47,613 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 21:38:47,614 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 21:38:47,617 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (19 of 20 remaining) [2025-03-08 21:38:47,618 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONDATA_RACE (18 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONDATA_RACE (17 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONDATA_RACE (16 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONDATA_RACE (15 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONDATA_RACE (14 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONDATA_RACE (13 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONDATA_RACE (12 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONDATA_RACE (11 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (10 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONDATA_RACE (8 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONDATA_RACE (7 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONDATA_RACE (6 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONDATA_RACE (5 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONDATA_RACE (4 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONDATA_RACE (3 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONDATA_RACE (2 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONDATA_RACE (1 of 20 remaining) [2025-03-08 21:38:47,619 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (0 of 20 remaining) [2025-03-08 21:38:47,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 21:38:47,620 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-03-08 21:38:47,625 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-08 21:38:47,626 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-03-08 21:38:47,677 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 21:38:47,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 201 transitions, 422 flow [2025-03-08 21:38:47,706 INFO L124 PetriNetUnfolderBase]: 5/196 cut-off events. [2025-03-08 21:38:47,706 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-08 21:38:47,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 196 events. 5/196 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 372 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 203. Up to 3 conditions per place. [2025-03-08 21:38:47,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 201 transitions, 422 flow [2025-03-08 21:38:47,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 180 transitions, 373 flow [2025-03-08 21:38:47,714 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 21:38:47,714 INFO L333 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;@58383319, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 21:38:47,715 INFO L334 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2025-03-08 21:38:47,720 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 21:38:47,721 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2025-03-08 21:38:47,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 21:38:47,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 21:38:47,722 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 21:38:47,722 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr2Err7ASSERT_VIOLATIONDATA_RACE, thr2Err6ASSERT_VIOLATIONDATA_RACE, thr2Err5ASSERT_VIOLATIONDATA_RACE, thr2Err4ASSERT_VIOLATIONDATA_RACE (and 25 more)] === [2025-03-08 21:38:47,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 21:38:47,724 INFO L85 PathProgramCache]: Analyzing trace with hash 527478314, now seen corresponding path program 1 times [2025-03-08 21:38:47,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 21:38:47,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637596960] [2025-03-08 21:38:47,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 21:38:47,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 21:38:47,736 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 21:38:47,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 21:38:47,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 21:38:47,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 21:38:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 21:38:47,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 21:38:47,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637596960] [2025-03-08 21:38:47,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637596960] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 21:38:47,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 21:38:47,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 21:38:47,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986552673] [2025-03-08 21:38:47,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 21:38:47,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 21:38:47,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 21:38:47,783 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 21:38:47,783 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 21:38:47,864 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 201 [2025-03-08 21:38:47,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 180 transitions, 373 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 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) [2025-03-08 21:38:47,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 21:38:47,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 201 [2025-03-08 21:38:47,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 21:38:49,465 INFO L124 PetriNetUnfolderBase]: 6178/16775 cut-off events. [2025-03-08 21:38:49,465 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2025-03-08 21:38:49,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27001 conditions, 16775 events. 6178/16775 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 164257 event pairs, 1936 based on Foata normal form. 4992/19927 useless extension candidates. Maximal degree in co-relation 26972. Up to 6244 conditions per place. [2025-03-08 21:38:49,576 INFO L140 encePairwiseOnDemand]: 162/201 looper letters, 60 selfloop transitions, 26 changer transitions 0/207 dead transitions. [2025-03-08 21:38:49,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 207 transitions, 607 flow [2025-03-08 21:38:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 21:38:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 21:38:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2025-03-08 21:38:49,578 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.857379767827529 [2025-03-08 21:38:49,579 INFO L175 Difference]: Start difference. First operand has 183 places, 180 transitions, 373 flow. Second operand 3 states and 517 transitions. [2025-03-08 21:38:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 207 transitions, 607 flow [2025-03-08 21:38:49,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 207 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-08 21:38:49,585 INFO L231 Difference]: Finished difference. Result has 177 places, 195 transitions, 576 flow [2025-03-08 21:38:49,586 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=576, PETRI_PLACES=177, PETRI_TRANSITIONS=195} [2025-03-08 21:38:49,587 INFO L279 CegarLoopForPetriNet]: 183 programPoint places, -6 predicate places. [2025-03-08 21:38:49,587 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 195 transitions, 576 flow [2025-03-08 21:38:49,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 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) [2025-03-08 21:38:49,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 21:38:49,588 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 21:38:49,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 21:38:49,588 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err7ASSERT_VIOLATIONDATA_RACE, thr2Err6ASSERT_VIOLATIONDATA_RACE, thr2Err5ASSERT_VIOLATIONDATA_RACE, thr2Err4ASSERT_VIOLATIONDATA_RACE (and 25 more)] === [2025-03-08 21:38:49,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 21:38:49,589 INFO L85 PathProgramCache]: Analyzing trace with hash 452024651, now seen corresponding path program 1 times [2025-03-08 21:38:49,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 21:38:49,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699878324] [2025-03-08 21:38:49,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 21:38:49,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 21:38:49,602 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-08 21:38:49,608 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 21:38:49,609 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 21:38:49,609 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 21:38:49,609 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 21:38:49,613 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-03-08 21:38:49,617 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-03-08 21:38:49,617 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 21:38:49,617 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 21:38:49,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 21:38:49,623 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (28 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONDATA_RACE (27 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONDATA_RACE (26 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONDATA_RACE (25 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONDATA_RACE (24 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONDATA_RACE (23 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONDATA_RACE (22 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONDATA_RACE (21 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONDATA_RACE (20 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (19 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (18 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONDATA_RACE (17 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONDATA_RACE (16 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONDATA_RACE (15 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONDATA_RACE (14 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONDATA_RACE (13 of 29 remaining) [2025-03-08 21:38:49,624 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONDATA_RACE (12 of 29 remaining) [2025-03-08 21:38:49,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONDATA_RACE (11 of 29 remaining) [2025-03-08 21:38:49,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONDATA_RACE (10 of 29 remaining) [2025-03-08 21:38:49,626 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7ASSERT_VIOLATIONDATA_RACE (9 of 29 remaining) [2025-03-08 21:38:49,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6ASSERT_VIOLATIONDATA_RACE (8 of 29 remaining) [2025-03-08 21:38:49,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5ASSERT_VIOLATIONDATA_RACE (7 of 29 remaining) [2025-03-08 21:38:49,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4ASSERT_VIOLATIONDATA_RACE (6 of 29 remaining) [2025-03-08 21:38:49,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3ASSERT_VIOLATIONDATA_RACE (5 of 29 remaining) [2025-03-08 21:38:49,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2ASSERT_VIOLATIONDATA_RACE (4 of 29 remaining) [2025-03-08 21:38:49,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1ASSERT_VIOLATIONDATA_RACE (3 of 29 remaining) [2025-03-08 21:38:49,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0ASSERT_VIOLATIONDATA_RACE (2 of 29 remaining) [2025-03-08 21:38:49,627 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (1 of 29 remaining) [2025-03-08 21:38:49,628 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONDATA_RACE (0 of 29 remaining) [2025-03-08 21:38:49,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 21:38:49,628 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-03-08 21:38:49,628 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-08 21:38:49,628 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-03-08 21:38:49,677 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 21:38:49,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 285 transitions, 606 flow [2025-03-08 21:38:49,749 INFO L124 PetriNetUnfolderBase]: 6/269 cut-off events. [2025-03-08 21:38:49,749 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2025-03-08 21:38:49,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 269 events. 6/269 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 707 event pairs, 0 based on Foata normal form. 0/234 useless extension candidates. Maximal degree in co-relation 280. Up to 4 conditions per place. [2025-03-08 21:38:49,751 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 285 transitions, 606 flow [2025-03-08 21:38:49,756 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 244 transitions, 509 flow [2025-03-08 21:38:49,757 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 21:38:49,757 INFO L333 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;@58383319, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 21:38:49,758 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2025-03-08 21:38:49,760 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 21:38:49,760 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2025-03-08 21:38:49,761 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 21:38:49,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 21:38:49,761 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 21:38:49,761 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONDATA_RACE === [thr2Err7ASSERT_VIOLATIONDATA_RACE, thr2Err6ASSERT_VIOLATIONDATA_RACE, thr2Err5ASSERT_VIOLATIONDATA_RACE, thr2Err4ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2025-03-08 21:38:49,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 21:38:49,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1379865769, now seen corresponding path program 1 times [2025-03-08 21:38:49,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 21:38:49,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102179395] [2025-03-08 21:38:49,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 21:38:49,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 21:38:49,771 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-08 21:38:49,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-08 21:38:49,777 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 21:38:49,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 21:38:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 21:38:49,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 21:38:49,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102179395] [2025-03-08 21:38:49,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102179395] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 21:38:49,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 21:38:49,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 21:38:49,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39307518] [2025-03-08 21:38:49,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 21:38:49,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 21:38:49,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 21:38:49,801 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 21:38:49,801 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 21:38:49,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 285 [2025-03-08 21:38:49,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 244 transitions, 509 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 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) [2025-03-08 21:38:49,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 21:38:49,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 285 [2025-03-08 21:38:49,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand