./Ultimate.py --spec ../sv-benchmarks/c/properties/no-data-race.prp --file ../sv-benchmarks/c/libvsync/rwlock.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/libvsync/rwlock.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 fd8ac353802a2e1d548b78214c4e90430a3b2551f535af0ed9cab2c49366d321 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 22:13:41,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 22:13:41,459 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2025-03-08 22:13:41,465 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 22:13:41,465 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 22:13:41,483 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 22:13:41,484 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 22:13:41,484 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 22:13:41,487 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 22:13:41,487 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 22:13:41,488 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 22:13:41,488 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 22:13:41,488 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 22:13:41,489 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:13:41,489 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 22:13:41,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 22:13:41,489 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 -> fd8ac353802a2e1d548b78214c4e90430a3b2551f535af0ed9cab2c49366d321 [2025-03-08 22:13:41,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 22:13:41,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 22:13:41,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 22:13:41,726 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 22:13:41,727 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 22:13:41,728 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/libvsync/rwlock.i [2025-03-08 22:13:42,828 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f3e6ffe/a93d9ad8db684c3f80c3e8524651c2a9/FLAGc62e1d9df [2025-03-08 22:13:43,283 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 22:13:43,286 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/libvsync/rwlock.i [2025-03-08 22:13:43,331 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f3e6ffe/a93d9ad8db684c3f80c3e8524651c2a9/FLAGc62e1d9df [2025-03-08 22:13:43,406 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6f3e6ffe/a93d9ad8db684c3f80c3e8524651c2a9 [2025-03-08 22:13:43,408 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 22:13:43,409 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 22:13:43,411 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 22:13:43,411 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 22:13:43,414 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 22:13:43,416 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:13:43" (1/1) ... [2025-03-08 22:13:43,417 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@792cdbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:43, skipping insertion in model container [2025-03-08 22:13:43,417 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 10:13:43" (1/1) ... [2025-03-08 22:13:43,484 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 22:13:44,908 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:13:44,917 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 22:13:44,979 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3755] [2025-03-08 22:13:44,980 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3757] [2025-03-08 22:13:44,980 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3762] [2025-03-08 22:13:44,981 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3764] [2025-03-08 22:13:44,981 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3770] [2025-03-08 22:13:44,982 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3772] [2025-03-08 22:13:44,982 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3778] [2025-03-08 22:13:44,982 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3780] [2025-03-08 22:13:44,983 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3786] [2025-03-08 22:13:44,983 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3788] [2025-03-08 22:13:44,983 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3794] [2025-03-08 22:13:44,984 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3796] [2025-03-08 22:13:44,984 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3802] [2025-03-08 22:13:44,984 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3804] [2025-03-08 22:13:44,984 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3810] [2025-03-08 22:13:44,985 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3812] [2025-03-08 22:13:44,985 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3817] [2025-03-08 22:13:44,985 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3819] [2025-03-08 22:13:44,985 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3824] [2025-03-08 22:13:44,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3826] [2025-03-08 22:13:44,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3831] [2025-03-08 22:13:44,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3833] [2025-03-08 22:13:44,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3838] [2025-03-08 22:13:44,986 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3840] [2025-03-08 22:13:44,987 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3845] [2025-03-08 22:13:44,987 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3847] [2025-03-08 22:13:44,987 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3852] [2025-03-08 22:13:44,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3855] [2025-03-08 22:13:44,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3861] [2025-03-08 22:13:44,988 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3864] [2025-03-08 22:13:44,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3870] [2025-03-08 22:13:44,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3873] [2025-03-08 22:13:44,989 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3879] [2025-03-08 22:13:44,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3882] [2025-03-08 22:13:44,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3888] [2025-03-08 22:13:44,990 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3891] [2025-03-08 22:13:44,991 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3897] [2025-03-08 22:13:44,991 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3900] [2025-03-08 22:13:44,991 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3907] [2025-03-08 22:13:44,992 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3910] [2025-03-08 22:13:44,992 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3917] [2025-03-08 22:13:44,993 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3920] [2025-03-08 22:13:44,993 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3927] [2025-03-08 22:13:44,993 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3930] [2025-03-08 22:13:44,994 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3937] [2025-03-08 22:13:44,994 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3940] [2025-03-08 22:13:44,994 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3947] [2025-03-08 22:13:44,995 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3950] [2025-03-08 22:13:44,995 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3957] [2025-03-08 22:13:44,996 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3960] [2025-03-08 22:13:44,996 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3966] [2025-03-08 22:13:44,996 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3969] [2025-03-08 22:13:44,997 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3975] [2025-03-08 22:13:44,997 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3978] [2025-03-08 22:13:44,997 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3984] [2025-03-08 22:13:44,998 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3987] [2025-03-08 22:13:44,998 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3993] [2025-03-08 22:13:44,998 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [3996] [2025-03-08 22:13:44,999 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4002] [2025-03-08 22:13:44,999 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4005] [2025-03-08 22:13:44,999 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4011] [2025-03-08 22:13:45,000 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4014] [2025-03-08 22:13:45,000 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4020] [2025-03-08 22:13:45,001 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4023] [2025-03-08 22:13:45,001 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4029] [2025-03-08 22:13:45,001 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4032] [2025-03-08 22:13:45,002 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4038] [2025-03-08 22:13:45,002 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4041] [2025-03-08 22:13:45,002 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4047] [2025-03-08 22:13:45,003 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4050] [2025-03-08 22:13:45,003 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4056] [2025-03-08 22:13:45,004 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4059] [2025-03-08 22:13:45,004 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4065] [2025-03-08 22:13:45,004 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4068] [2025-03-08 22:13:45,004 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4074] [2025-03-08 22:13:45,005 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4077] [2025-03-08 22:13:45,005 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4083] [2025-03-08 22:13:45,006 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4086] [2025-03-08 22:13:45,006 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4092] [2025-03-08 22:13:45,007 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4095] [2025-03-08 22:13:45,007 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4101] [2025-03-08 22:13:45,007 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4103] [2025-03-08 22:13:45,007 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4109] [2025-03-08 22:13:45,008 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4111] [2025-03-08 22:13:45,008 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4117] [2025-03-08 22:13:45,008 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4119] [2025-03-08 22:13:45,008 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4125] [2025-03-08 22:13:45,009 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4127] [2025-03-08 22:13:45,009 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4133] [2025-03-08 22:13:45,009 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4135] [2025-03-08 22:13:45,009 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4141] [2025-03-08 22:13:45,012 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4143] [2025-03-08 22:13:45,012 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4149] [2025-03-08 22:13:45,013 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4151] [2025-03-08 22:13:45,013 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4157] [2025-03-08 22:13:45,014 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4159] [2025-03-08 22:13:45,014 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4165] [2025-03-08 22:13:45,015 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4167] [2025-03-08 22:13:45,015 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4173] [2025-03-08 22:13:45,015 WARN L75 lationResultReporter]: Unsoundness Warning: Ignoring inline assembler instruction C: __asm__ __volatile__("" ::: "memory"); [4175] [2025-03-08 22:13:45,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 22:13:45,303 INFO L204 MainTranslator]: Completed translation [2025-03-08 22:13:45,304 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45 WrapperNode [2025-03-08 22:13:45,304 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 22:13:45,305 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 22:13:45,305 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 22:13:45,305 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 22:13:45,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,359 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,412 INFO L138 Inliner]: procedures = 930, calls = 943, calls flagged for inlining = 835, calls inlined = 70, statements flattened = 789 [2025-03-08 22:13:45,413 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 22:13:45,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 22:13:45,413 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 22:13:45,413 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 22:13:45,419 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,426 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,427 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,449 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,452 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,456 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,458 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 22:13:45,471 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 22:13:45,471 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 22:13:45,471 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 22:13:45,474 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (1/1) ... [2025-03-08 22:13:45,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 22:13:45,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 22:13:45,501 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 22:13:45,507 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 22:13:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2025-03-08 22:13:45,521 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2025-03-08 22:13:45,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-03-08 22:13:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 22:13:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 22:13:45,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 22:13:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2025-03-08 22:13:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-03-08 22:13:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2025-03-08 22:13:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2025-03-08 22:13:45,522 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2025-03-08 22:13:45,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-03-08 22:13:45,524 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 22:13:45,674 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 22:13:45,676 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 22:13:46,016 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L2255: havoc vatomic32_await_eq_rlx_#t~ret168#1; [2025-03-08 22:13:46,017 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L2425: havoc vatomic32_await_ge_sub_acq_#t~ret202#1; [2025-03-08 22:13:46,168 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L6076-1: SUMMARY for call ULTIMATE.dealloc(main_~#t~0#1.base, main_~#t~0#1.offset); srcloc: null [2025-03-08 22:13:46,168 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L6076: havoc main_~#t~0#1.base, main_~#t~0#1.offset; [2025-03-08 22:13:46,403 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L2425: havoc vatomic32_await_ge_sub_acq_#t~ret202#1; [2025-03-08 22:13:46,403 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L2570: havoc vatomic32_await_eq_set_rlx_#t~ret231#1; [2025-03-08 22:13:46,404 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 22:13:46,404 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 22:13:46,536 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 22:13:46,536 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 22:13:46,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:13:46 BoogieIcfgContainer [2025-03-08 22:13:46,537 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 22:13:46,538 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 22:13:46,539 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 22:13:46,542 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 22:13:46,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 10:13:43" (1/3) ... [2025-03-08 22:13:46,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c6e5d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:13:46, skipping insertion in model container [2025-03-08 22:13:46,543 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 10:13:45" (2/3) ... [2025-03-08 22:13:46,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c6e5d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 10:13:46, skipping insertion in model container [2025-03-08 22:13:46,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 10:13:46" (3/3) ... [2025-03-08 22:13:46,545 INFO L128 eAbstractionObserver]: Analyzing ICFG rwlock.i [2025-03-08 22:13:46,557 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 22:13:46,558 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG rwlock.i that has 3 procedures, 751 locations, 1 initial locations, 36 loop locations, and 31 error locations. [2025-03-08 22:13:46,560 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 22:13:46,741 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-08 22:13:46,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 757 places, 896 transitions, 1806 flow [2025-03-08 22:13:47,237 INFO L124 PetriNetUnfolderBase]: 253/1501 cut-off events. [2025-03-08 22:13:47,240 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-08 22:13:47,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1501 events. 253/1501 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 6373 event pairs, 0 based on Foata normal form. 0/1185 useless extension candidates. Maximal degree in co-relation 939. Up to 16 conditions per place. [2025-03-08 22:13:47,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 757 places, 896 transitions, 1806 flow [2025-03-08 22:13:47,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 757 places, 896 transitions, 1806 flow [2025-03-08 22:13:47,321 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 22:13:47,329 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;@52b14fb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 22:13:47,330 INFO L334 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2025-03-08 22:13:47,338 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 22:13:47,338 INFO L124 PetriNetUnfolderBase]: 12/60 cut-off events. [2025-03-08 22:13:47,338 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 22:13:47,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 22:13:47,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:13:47,339 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE === [readerErr8ASSERT_VIOLATIONDATA_RACE, readerErr7ASSERT_VIOLATIONDATA_RACE, readerErr5ASSERT_VIOLATIONDATA_RACE, readerErr4ASSERT_VIOLATIONDATA_RACE (and 54 more)] === [2025-03-08 22:13:47,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:13:47,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1382358895, now seen corresponding path program 1 times [2025-03-08 22:13:47,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:13:47,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520055374] [2025-03-08 22:13:47,349 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:13:47,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:13:47,417 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 22:13:47,432 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 22:13:47,432 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:13:47,432 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:13:47,508 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 22:13:47,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:13:47,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520055374] [2025-03-08 22:13:47,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520055374] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:13:47,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:13:47,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:13:47,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354046229] [2025-03-08 22:13:47,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:13:47,517 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 22:13:47,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:13:47,533 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 22:13:47,533 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 22:13:47,537 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 734 out of 896 [2025-03-08 22:13:47,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 757 places, 896 transitions, 1806 flow. Second operand has 2 states, 2 states have (on average 734.5) internal successors, (1469), 2 states have internal predecessors, (1469), 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 22:13:47,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 22:13:47,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 734 of 896 [2025-03-08 22:13:47,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 22:13:48,446 INFO L124 PetriNetUnfolderBase]: 121/4120 cut-off events. [2025-03-08 22:13:48,446 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2025-03-08 22:13:48,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4296 conditions, 4120 events. 121/4120 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 26068 event pairs, 54 based on Foata normal form. 1319/5152 useless extension candidates. Maximal degree in co-relation 3589. Up to 135 conditions per place. [2025-03-08 22:13:48,488 INFO L140 encePairwiseOnDemand]: 750/896 looper letters, 16 selfloop transitions, 0 changer transitions 0/744 dead transitions. [2025-03-08 22:13:48,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 735 places, 744 transitions, 1534 flow [2025-03-08 22:13:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-03-08 22:13:48,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2025-03-08 22:13:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 1630 transitions. [2025-03-08 22:13:48,506 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.9095982142857143 [2025-03-08 22:13:48,509 INFO L175 Difference]: Start difference. First operand has 757 places, 896 transitions, 1806 flow. Second operand 2 states and 1630 transitions. [2025-03-08 22:13:48,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 735 places, 744 transitions, 1534 flow [2025-03-08 22:13:48,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 735 places, 744 transitions, 1534 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 22:13:48,527 INFO L231 Difference]: Finished difference. Result has 735 places, 744 transitions, 1502 flow [2025-03-08 22:13:48,530 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=896, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=1502, PETRI_PLACES=735, PETRI_TRANSITIONS=744} [2025-03-08 22:13:48,534 INFO L279 CegarLoopForPetriNet]: 757 programPoint places, -22 predicate places. [2025-03-08 22:13:48,534 INFO L471 AbstractCegarLoop]: Abstraction has has 735 places, 744 transitions, 1502 flow [2025-03-08 22:13:48,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 734.5) internal successors, (1469), 2 states have internal predecessors, (1469), 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 22:13:48,535 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 22:13:48,535 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:13:48,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-08 22:13:48,536 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE === [readerErr8ASSERT_VIOLATIONDATA_RACE, readerErr7ASSERT_VIOLATIONDATA_RACE, readerErr5ASSERT_VIOLATIONDATA_RACE, readerErr4ASSERT_VIOLATIONDATA_RACE (and 54 more)] === [2025-03-08 22:13:48,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:13:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash 895452777, now seen corresponding path program 1 times [2025-03-08 22:13:48,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:13:48,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970620486] [2025-03-08 22:13:48,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:13:48,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:13:48,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-08 22:13:48,580 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-08 22:13:48,581 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:13:48,581 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:13:49,410 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 22:13:49,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:13:49,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970620486] [2025-03-08 22:13:49,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970620486] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:13:49,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:13:49,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 22:13:49,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498227822] [2025-03-08 22:13:49,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:13:49,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 22:13:49,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:13:49,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 22:13:49,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-08 22:13:49,665 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 703 out of 896 [2025-03-08 22:13:49,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 735 places, 744 transitions, 1502 flow. Second operand has 6 states, 6 states have (on average 704.5) internal successors, (4227), 6 states have internal predecessors, (4227), 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 22:13:49,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 22:13:49,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 703 of 896 [2025-03-08 22:13:49,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 22:13:54,485 INFO L124 PetriNetUnfolderBase]: 2804/28671 cut-off events. [2025-03-08 22:13:54,485 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2025-03-08 22:13:54,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32663 conditions, 28671 events. 2804/28671 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 349542 event pairs, 2069 based on Foata normal form. 0/27006 useless extension candidates. Maximal degree in co-relation 32658. Up to 3827 conditions per place. [2025-03-08 22:13:54,662 INFO L140 encePairwiseOnDemand]: 874/896 looper letters, 46 selfloop transitions, 66 changer transitions 0/809 dead transitions. [2025-03-08 22:13:54,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 809 transitions, 1856 flow [2025-03-08 22:13:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-08 22:13:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-08 22:13:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 4331 transitions. [2025-03-08 22:13:54,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.8056175595238095 [2025-03-08 22:13:54,669 INFO L175 Difference]: Start difference. First operand has 735 places, 744 transitions, 1502 flow. Second operand 6 states and 4331 transitions. [2025-03-08 22:13:54,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 809 transitions, 1856 flow [2025-03-08 22:13:54,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 809 transitions, 1856 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 22:13:54,681 INFO L231 Difference]: Finished difference. Result has 745 places, 809 transitions, 1938 flow [2025-03-08 22:13:54,682 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=896, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=735, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=723, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1938, PETRI_PLACES=745, PETRI_TRANSITIONS=809} [2025-03-08 22:13:54,683 INFO L279 CegarLoopForPetriNet]: 757 programPoint places, -12 predicate places. [2025-03-08 22:13:54,683 INFO L471 AbstractCegarLoop]: Abstraction has has 745 places, 809 transitions, 1938 flow [2025-03-08 22:13:54,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 704.5) internal successors, (4227), 6 states have internal predecessors, (4227), 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 22:13:54,685 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 22:13:54,685 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, 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 22:13:54,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-08 22:13:54,685 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE === [readerErr8ASSERT_VIOLATIONDATA_RACE, readerErr7ASSERT_VIOLATIONDATA_RACE, readerErr5ASSERT_VIOLATIONDATA_RACE, readerErr4ASSERT_VIOLATIONDATA_RACE (and 54 more)] === [2025-03-08 22:13:54,686 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:13:54,686 INFO L85 PathProgramCache]: Analyzing trace with hash -937897695, now seen corresponding path program 1 times [2025-03-08 22:13:54,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:13:54,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447815908] [2025-03-08 22:13:54,686 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:13:54,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:13:54,695 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 48 statements into 1 equivalence classes. [2025-03-08 22:13:54,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 48 of 48 statements. [2025-03-08 22:13:54,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:13:54,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:13:54,732 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 22:13:54,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:13:54,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447815908] [2025-03-08 22:13:54,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447815908] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:13:54,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:13:54,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-08 22:13:54,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301682821] [2025-03-08 22:13:54,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:13:54,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-08 22:13:54,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:13:54,734 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-08 22:13:54,734 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-08 22:13:54,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 728 out of 896 [2025-03-08 22:13:54,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 745 places, 809 transitions, 1938 flow. Second operand has 3 states, 3 states have (on average 729.3333333333334) internal successors, (2188), 3 states have internal predecessors, (2188), 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 22:13:54,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 22:13:54,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 728 of 896 [2025-03-08 22:13:54,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-08 22:13:55,989 INFO L124 PetriNetUnfolderBase]: 462/8335 cut-off events. [2025-03-08 22:13:55,989 INFO L125 PetriNetUnfolderBase]: For 447/730 co-relation queries the response was YES. [2025-03-08 22:13:56,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9440 conditions, 8335 events. 462/8335 cut-off events. For 447/730 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 71253 event pairs, 50 based on Foata normal form. 32/7894 useless extension candidates. Maximal degree in co-relation 9430. Up to 422 conditions per place. [2025-03-08 22:13:56,042 INFO L140 encePairwiseOnDemand]: 893/896 looper letters, 56 selfloop transitions, 2 changer transitions 0/817 dead transitions. [2025-03-08 22:13:56,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 747 places, 817 transitions, 2088 flow [2025-03-08 22:13:56,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-08 22:13:56,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-08 22:13:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 2214 transitions. [2025-03-08 22:13:56,047 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.8236607142857143 [2025-03-08 22:13:56,047 INFO L175 Difference]: Start difference. First operand has 745 places, 809 transitions, 1938 flow. Second operand 3 states and 2214 transitions. [2025-03-08 22:13:56,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 747 places, 817 transitions, 2088 flow [2025-03-08 22:13:56,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 747 places, 817 transitions, 2088 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-03-08 22:13:56,061 INFO L231 Difference]: Finished difference. Result has 748 places, 809 transitions, 1946 flow [2025-03-08 22:13:56,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=896, PETRI_DIFFERENCE_MINUEND_FLOW=1938, PETRI_DIFFERENCE_MINUEND_PLACES=745, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=807, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1946, PETRI_PLACES=748, PETRI_TRANSITIONS=809} [2025-03-08 22:13:56,062 INFO L279 CegarLoopForPetriNet]: 757 programPoint places, -9 predicate places. [2025-03-08 22:13:56,062 INFO L471 AbstractCegarLoop]: Abstraction has has 748 places, 809 transitions, 1946 flow [2025-03-08 22:13:56,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 729.3333333333334) internal successors, (2188), 3 states have internal predecessors, (2188), 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 22:13:56,063 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 22:13:56,064 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:13:56,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-08 22:13:56,064 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [readerErr8ASSERT_VIOLATIONDATA_RACE, readerErr7ASSERT_VIOLATIONDATA_RACE, readerErr5ASSERT_VIOLATIONDATA_RACE, readerErr4ASSERT_VIOLATIONDATA_RACE (and 54 more)] === [2025-03-08 22:13:56,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:13:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1450264463, now seen corresponding path program 1 times [2025-03-08 22:13:56,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:13:56,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107053845] [2025-03-08 22:13:56,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:13:56,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:13:56,083 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 22:13:56,099 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 22:13:56,100 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:13:56,100 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 22:13:56,100 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-08 22:13:56,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 55 statements into 1 equivalence classes. [2025-03-08 22:13:56,117 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 55 of 55 statements. [2025-03-08 22:13:56,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:13:56,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-08 22:13:56,145 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-08 22:13:56,145 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-08 22:13:56,145 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (57 of 58 remaining) [2025-03-08 22:13:56,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr8ASSERT_VIOLATIONDATA_RACE (56 of 58 remaining) [2025-03-08 22:13:56,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr7ASSERT_VIOLATIONDATA_RACE (55 of 58 remaining) [2025-03-08 22:13:56,147 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr5ASSERT_VIOLATIONDATA_RACE (54 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr4ASSERT_VIOLATIONDATA_RACE (53 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr6ASSERT_VIOLATIONDATA_RACE (52 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr3ASSERT_VIOLATIONDATA_RACE (51 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr2ASSERT_VIOLATIONDATA_RACE (50 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr1ASSERT_VIOLATIONDATA_RACE (49 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONDATA_RACE (48 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE (47 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (46 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (45 of 58 remaining) [2025-03-08 22:13:56,148 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (44 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (43 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (42 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (41 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr15ASSERT_VIOLATIONDATA_RACE (40 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr12ASSERT_VIOLATIONDATA_RACE (39 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr14ASSERT_VIOLATIONDATA_RACE (38 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr13ASSERT_VIOLATIONDATA_RACE (37 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr11ASSERT_VIOLATIONDATA_RACE (36 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr9ASSERT_VIOLATIONDATA_RACE (35 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr8ASSERT_VIOLATIONDATA_RACE (34 of 58 remaining) [2025-03-08 22:13:56,149 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr10ASSERT_VIOLATIONDATA_RACE (33 of 58 remaining) [2025-03-08 22:13:56,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr7ASSERT_VIOLATIONDATA_RACE (32 of 58 remaining) [2025-03-08 22:13:56,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr6ASSERT_VIOLATIONDATA_RACE (31 of 58 remaining) [2025-03-08 22:13:56,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr5ASSERT_VIOLATIONDATA_RACE (30 of 58 remaining) [2025-03-08 22:13:56,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr4ASSERT_VIOLATIONDATA_RACE (29 of 58 remaining) [2025-03-08 22:13:56,150 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr3ASSERT_VIOLATIONDATA_RACE (28 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr2ASSERT_VIOLATIONDATA_RACE (27 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr1ASSERT_VIOLATIONDATA_RACE (26 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr0ASSERT_VIOLATIONDATA_RACE (25 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr8ASSERT_VIOLATIONDATA_RACE (24 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr7ASSERT_VIOLATIONDATA_RACE (23 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr5ASSERT_VIOLATIONDATA_RACE (22 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr4ASSERT_VIOLATIONDATA_RACE (21 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr6ASSERT_VIOLATIONDATA_RACE (20 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr3ASSERT_VIOLATIONDATA_RACE (19 of 58 remaining) [2025-03-08 22:13:56,151 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr2ASSERT_VIOLATIONDATA_RACE (18 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr1ASSERT_VIOLATIONDATA_RACE (17 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONDATA_RACE (16 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr15ASSERT_VIOLATIONDATA_RACE (15 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr12ASSERT_VIOLATIONDATA_RACE (14 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr14ASSERT_VIOLATIONDATA_RACE (13 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr13ASSERT_VIOLATIONDATA_RACE (12 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr11ASSERT_VIOLATIONDATA_RACE (11 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr9ASSERT_VIOLATIONDATA_RACE (10 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr8ASSERT_VIOLATIONDATA_RACE (9 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr10ASSERT_VIOLATIONDATA_RACE (8 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr7ASSERT_VIOLATIONDATA_RACE (7 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr6ASSERT_VIOLATIONDATA_RACE (6 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr5ASSERT_VIOLATIONDATA_RACE (5 of 58 remaining) [2025-03-08 22:13:56,152 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr4ASSERT_VIOLATIONDATA_RACE (4 of 58 remaining) [2025-03-08 22:13:56,153 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr3ASSERT_VIOLATIONDATA_RACE (3 of 58 remaining) [2025-03-08 22:13:56,153 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr2ASSERT_VIOLATIONDATA_RACE (2 of 58 remaining) [2025-03-08 22:13:56,153 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr1ASSERT_VIOLATIONDATA_RACE (1 of 58 remaining) [2025-03-08 22:13:56,153 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location writerErr0ASSERT_VIOLATIONDATA_RACE (0 of 58 remaining) [2025-03-08 22:13:56,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-08 22:13:56,153 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2025-03-08 22:13:56,156 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-03-08 22:13:56,156 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-03-08 22:13:56,379 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-03-08 22:13:56,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1384 places, 1637 transitions, 3306 flow [2025-03-08 22:13:58,308 INFO L124 PetriNetUnfolderBase]: 699/4087 cut-off events. [2025-03-08 22:13:58,308 INFO L125 PetriNetUnfolderBase]: For 40/52 co-relation queries the response was YES. [2025-03-08 22:13:58,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4144 conditions, 4087 events. 699/4087 cut-off events. For 40/52 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 25196 event pairs, 1 based on Foata normal form. 0/3213 useless extension candidates. Maximal degree in co-relation 2565. Up to 48 conditions per place. [2025-03-08 22:13:58,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 1384 places, 1637 transitions, 3306 flow [2025-03-08 22:13:58,513 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1384 places, 1637 transitions, 3306 flow [2025-03-08 22:13:58,513 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 22:13:58,514 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;@52b14fb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 22:13:58,514 INFO L334 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2025-03-08 22:13:58,519 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 22:13:58,522 INFO L124 PetriNetUnfolderBase]: 12/60 cut-off events. [2025-03-08 22:13:58,522 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 22:13:58,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 22:13:58,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 22:13:58,522 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE === [readerErr8ASSERT_VIOLATIONDATA_RACE, readerErr7ASSERT_VIOLATIONDATA_RACE, readerErr5ASSERT_VIOLATIONDATA_RACE, readerErr4ASSERT_VIOLATIONDATA_RACE (and 79 more)] === [2025-03-08 22:13:58,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 22:13:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1639767725, now seen corresponding path program 1 times [2025-03-08 22:13:58,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 22:13:58,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471601095] [2025-03-08 22:13:58,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 22:13:58,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 22:13:58,532 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-08 22:13:58,533 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-08 22:13:58,533 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 22:13:58,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 22:13:58,542 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 22:13:58,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 22:13:58,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471601095] [2025-03-08 22:13:58,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471601095] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 22:13:58,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 22:13:58,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-08 22:13:58,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815697195] [2025-03-08 22:13:58,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 22:13:58,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-03-08 22:13:58,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 22:13:58,546 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-03-08 22:13:58,547 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-03-08 22:13:58,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 1339 out of 1637 [2025-03-08 22:13:58,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1384 places, 1637 transitions, 3306 flow. Second operand has 2 states, 2 states have (on average 1339.5) internal successors, (2679), 2 states have internal predecessors, (2679), 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 22:13:58,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 22:13:58,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1339 of 1637 [2025-03-08 22:13:58,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand