./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/no-data-race.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.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 0b278c8af08551c2e27294e2c5dca8c5bd0f6f00874366f88466c32210c557af --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 15:11:30,420 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 15:11:30,478 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2024-10-24 15:11:30,483 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 15:11:30,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 15:11:30,508 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 15:11:30,509 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 15:11:30,510 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 15:11:30,510 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 15:11:30,511 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 15:11:30,511 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 15:11:30,511 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 15:11:30,512 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 15:11:30,512 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 15:11:30,512 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 15:11:30,513 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 15:11:30,513 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 15:11:30,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 15:11:30,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 15:11:30,515 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 15:11:30,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 15:11:30,518 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 15:11:30,518 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2024-10-24 15:11:30,518 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 15:11:30,518 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 15:11:30,518 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 15:11:30,519 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 15:11:30,519 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 15:11:30,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 15:11:30,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 15:11:30,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 15:11:30,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 15:11:30,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 15:11:30,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 15:11:30,520 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 15:11:30,520 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 15:11:30,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 15:11:30,521 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 15:11:30,521 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 15:11:30,522 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 15:11:30,523 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 15:11:30,523 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b278c8af08551c2e27294e2c5dca8c5bd0f6f00874366f88466c32210c557af [2024-10-24 15:11:30,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 15:11:30,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 15:11:30,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 15:11:30,777 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 15:11:30,777 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 15:11:30,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-10-24 15:11:32,073 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 15:11:32,272 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 15:11:32,273 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-10-24 15:11:32,289 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060504ab9/4a95255297aa48f1834ee8a15f7e4bbc/FLAGaf4901285 [2024-10-24 15:11:32,628 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/060504ab9/4a95255297aa48f1834ee8a15f7e4bbc [2024-10-24 15:11:32,630 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 15:11:32,631 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 15:11:32,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 15:11:32,637 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 15:11:32,641 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 15:11:32,642 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:11:32" (1/1) ... [2024-10-24 15:11:32,642 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@681b47a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:32, skipping insertion in model container [2024-10-24 15:11:32,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 03:11:32" (1/1) ... [2024-10-24 15:11:32,682 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 15:11:33,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 15:11:33,034 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 15:11:33,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 15:11:33,186 INFO L204 MainTranslator]: Completed translation [2024-10-24 15:11:33,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33 WrapperNode [2024-10-24 15:11:33,187 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 15:11:33,188 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 15:11:33,188 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 15:11:33,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 15:11:33,193 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,210 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,242 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 952 [2024-10-24 15:11:33,243 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 15:11:33,243 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 15:11:33,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 15:11:33,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 15:11:33,250 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,250 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,255 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,256 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,270 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,278 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,281 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,288 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,292 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 15:11:33,293 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 15:11:33,293 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 15:11:33,293 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 15:11:33,294 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (1/1) ... [2024-10-24 15:11:33,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 15:11:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 15:11:33,326 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) [2024-10-24 15:11:33,333 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 [2024-10-24 15:11:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 15:11:33,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 15:11:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-10-24 15:11:33,371 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-10-24 15:11:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-10-24 15:11:33,371 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-10-24 15:11:33,371 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-10-24 15:11:33,372 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-10-24 15:11:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-10-24 15:11:33,372 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-10-24 15:11:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-10-24 15:11:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 15:11:33,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 15:11:33,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 15:11:33,375 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 15:11:33,548 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 15:11:33,550 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 15:11:34,683 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 15:11:34,684 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 15:11:38,201 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 15:11:38,201 INFO L314 CfgBuilder]: Removed 0 assume(true) statements. [2024-10-24 15:11:38,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:11:38 BoogieIcfgContainer [2024-10-24 15:11:38,202 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 15:11:38,203 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 15:11:38,203 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 15:11:38,207 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 15:11:38,207 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 03:11:32" (1/3) ... [2024-10-24 15:11:38,207 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74434c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:11:38, skipping insertion in model container [2024-10-24 15:11:38,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 03:11:33" (2/3) ... [2024-10-24 15:11:38,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74434c57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 03:11:38, skipping insertion in model container [2024-10-24 15:11:38,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 03:11:38" (3/3) ... [2024-10-24 15:11:38,209 INFO L112 eAbstractionObserver]: Analyzing ICFG mix029_power.opt_pso.opt_rmo.opt.i [2024-10-24 15:11:38,223 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 15:11:38,223 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 254 error locations. [2024-10-24 15:11:38,223 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 15:11:38,378 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-24 15:11:38,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 395 places, 385 transitions, 786 flow [2024-10-24 15:11:38,630 INFO L124 PetriNetUnfolderBase]: 3/381 cut-off events. [2024-10-24 15:11:38,631 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 15:11:38,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 381 events. 3/381 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 2028 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 344. Up to 2 conditions per place. [2024-10-24 15:11:38,652 INFO L82 GeneralOperation]: Start removeDead. Operand has 395 places, 385 transitions, 786 flow [2024-10-24 15:11:38,666 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 391 places, 381 transitions, 774 flow [2024-10-24 15:11:38,674 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 15:11:38,679 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;@1b774098, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 15:11:38,679 INFO L334 AbstractCegarLoop]: Starting to check reachability of 380 error locations. [2024-10-24 15:11:38,684 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 15:11:38,685 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-10-24 15:11:38,685 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 15:11:38,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 15:11:38,685 INFO L204 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 15:11:38,686 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONDATA_RACE === [P0Err0ASSERT_VIOLATIONDATA_RACE, P0Err1ASSERT_VIOLATIONDATA_RACE, P0Err2ASSERT_VIOLATIONDATA_RACE, P0Err3ASSERT_VIOLATIONDATA_RACE (and 376 more)] === [2024-10-24 15:11:38,692 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 15:11:38,692 INFO L85 PathProgramCache]: Analyzing trace with hash -2130076007, now seen corresponding path program 1 times [2024-10-24 15:11:38,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 15:11:38,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505969033] [2024-10-24 15:11:38,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 15:11:38,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 15:11:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 15:11:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 15:11:38,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 15:11:38,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505969033] [2024-10-24 15:11:38,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505969033] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 15:11:38,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 15:11:38,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 15:11:38,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932240263] [2024-10-24 15:11:38,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 15:11:38,909 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 15:11:38,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 15:11:38,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 15:11:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 15:11:38,935 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 385 [2024-10-24 15:11:38,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 381 transitions, 774 flow. Second operand has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 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) [2024-10-24 15:11:38,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 15:11:38,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 385 [2024-10-24 15:11:38,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 15:11:47,293 INFO L124 PetriNetUnfolderBase]: 7310/20393 cut-off events. [2024-10-24 15:11:47,293 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2024-10-24 15:11:47,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30483 conditions, 20393 events. 7310/20393 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 243934 event pairs, 7310 based on Foata normal form. 1747/20765 useless extension candidates. Maximal degree in co-relation 30431. Up to 9835 conditions per place. [2024-10-24 15:11:47,425 INFO L140 encePairwiseOnDemand]: 130/385 looper letters, 23 selfloop transitions, 0 changer transitions 0/124 dead transitions. [2024-10-24 15:11:47,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 124 transitions, 306 flow [2024-10-24 15:11:47,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 15:11:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-24 15:11:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 490 transitions. [2024-10-24 15:11:47,439 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-10-24 15:11:47,442 INFO L175 Difference]: Start difference. First operand has 391 places, 381 transitions, 774 flow. Second operand 2 states and 490 transitions. [2024-10-24 15:11:47,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 124 transitions, 306 flow [2024-10-24 15:11:47,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 124 transitions, 302 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 15:11:47,447 INFO L231 Difference]: Finished difference. Result has 134 places, 124 transitions, 256 flow [2024-10-24 15:11:47,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=256, PETRI_PLACES=134, PETRI_TRANSITIONS=124} [2024-10-24 15:11:47,451 INFO L277 CegarLoopForPetriNet]: 391 programPoint places, -257 predicate places. [2024-10-24 15:11:47,452 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 124 transitions, 256 flow [2024-10-24 15:11:47,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 107.0) internal successors, (214), 2 states have internal predecessors, (214), 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) [2024-10-24 15:11:47,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 15:11:47,453 INFO L204 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 15:11:47,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 15:11:47,453 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [P0Err0ASSERT_VIOLATIONDATA_RACE, P0Err1ASSERT_VIOLATIONDATA_RACE, P0Err2ASSERT_VIOLATIONDATA_RACE, P0Err3ASSERT_VIOLATIONDATA_RACE (and 376 more)] === [2024-10-24 15:11:47,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 15:11:47,455 INFO L85 PathProgramCache]: Analyzing trace with hash 721918257, now seen corresponding path program 1 times [2024-10-24 15:11:47,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 15:11:47,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120518691] [2024-10-24 15:11:47,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 15:11:47,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 15:11:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 15:11:47,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 15:11:47,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 15:11:47,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120518691] [2024-10-24 15:11:47,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120518691] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 15:11:47,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 15:11:47,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 15:11:47,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182566874] [2024-10-24 15:11:47,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 15:11:47,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 15:11:47,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 15:11:47,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 15:11:47,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 15:11:47,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 385 [2024-10-24 15:11:47,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 124 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2024-10-24 15:11:47,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 15:11:47,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 385 [2024-10-24 15:11:47,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 15:11:56,525 INFO L124 PetriNetUnfolderBase]: 11130/29352 cut-off events. [2024-10-24 15:11:56,526 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 15:11:56,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44459 conditions, 29352 events. 11130/29352 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 343199 event pairs, 3490 based on Foata normal form. 0/27505 useless extension candidates. Maximal degree in co-relation 44456. Up to 10040 conditions per place. [2024-10-24 15:11:56,673 INFO L140 encePairwiseOnDemand]: 383/385 looper letters, 40 selfloop transitions, 1 changer transitions 0/139 dead transitions. [2024-10-24 15:11:56,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 139 transitions, 368 flow [2024-10-24 15:11:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 15:11:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 15:11:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2024-10-24 15:11:56,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3038961038961039 [2024-10-24 15:11:56,677 INFO L175 Difference]: Start difference. First operand has 134 places, 124 transitions, 256 flow. Second operand 3 states and 351 transitions. [2024-10-24 15:11:56,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 139 transitions, 368 flow [2024-10-24 15:11:56,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 139 transitions, 368 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 15:11:56,680 INFO L231 Difference]: Finished difference. Result has 135 places, 123 transitions, 256 flow [2024-10-24 15:11:56,680 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=385, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=135, PETRI_TRANSITIONS=123} [2024-10-24 15:11:56,680 INFO L277 CegarLoopForPetriNet]: 391 programPoint places, -256 predicate places. [2024-10-24 15:11:56,680 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 123 transitions, 256 flow [2024-10-24 15:11:56,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 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) [2024-10-24 15:11:56,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 15:11:56,681 INFO L204 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, 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, 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] [2024-10-24 15:11:56,681 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 15:11:56,681 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr131ASSERT_VIOLATIONDATA_RACE === [P0Err0ASSERT_VIOLATIONDATA_RACE, P0Err1ASSERT_VIOLATIONDATA_RACE, P0Err2ASSERT_VIOLATIONDATA_RACE, P0Err3ASSERT_VIOLATIONDATA_RACE (and 376 more)] === [2024-10-24 15:11:56,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 15:11:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1376134446, now seen corresponding path program 1 times [2024-10-24 15:11:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 15:11:56,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715010687] [2024-10-24 15:11:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 15:11:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 15:11:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 15:11:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 15:11:56,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 15:11:56,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715010687] [2024-10-24 15:11:56,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715010687] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 15:11:56,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 15:11:56,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 15:11:56,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035444524] [2024-10-24 15:11:56,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 15:11:56,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 15:11:56,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 15:11:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 15:11:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 15:11:56,868 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 385 [2024-10-24 15:11:56,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 123 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 106.0) internal successors, (318), 3 states have internal predecessors, (318), 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) [2024-10-24 15:11:56,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 15:11:56,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 385 [2024-10-24 15:11:56,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand