./Ultimate.py --spec ../sv-benchmarks/c/properties/no-data-race.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.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 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 06:57:20,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 06:57:20,722 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2024-11-09 06:57:20,729 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 06:57:20,729 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 06:57:20,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 06:57:20,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 06:57:20,766 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 06:57:20,767 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 06:57:20,770 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 06:57:20,771 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 06:57:20,771 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 06:57:20,771 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 06:57:20,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 06:57:20,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 06:57:20,772 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 06:57:20,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 06:57:20,772 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 06:57:20,772 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 06:57:20,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 06:57:20,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 06:57:20,775 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 06:57:20,775 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2024-11-09 06:57:20,776 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 06:57:20,776 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 06:57:20,776 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 06:57:20,776 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 06:57:20,776 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 06:57:20,776 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 06:57:20,776 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 06:57:20,777 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 06:57:20,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 06:57:20,777 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 06:57:20,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 06:57:20,777 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 06:57:20,777 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 06:57:20,777 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 06:57:20,777 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 06:57:20,778 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 06:57:20,778 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 06:57:20,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 06:57:20,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2024-11-09 06:57:21,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 06:57:21,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 06:57:21,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 06:57:21,037 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 06:57:21,037 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 06:57:21,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-11-09 06:57:22,412 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 06:57:22,654 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 06:57:22,654 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-11-09 06:57:22,678 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0884f3e8/2a9b6bee464b46b5935713c7070cc1c4/FLAGdcc53b6c2 [2024-11-09 06:57:22,970 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0884f3e8/2a9b6bee464b46b5935713c7070cc1c4 [2024-11-09 06:57:22,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 06:57:22,974 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 06:57:22,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 06:57:22,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 06:57:22,981 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 06:57:22,982 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:57:22" (1/1) ... [2024-11-09 06:57:22,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e51d6ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:22, skipping insertion in model container [2024-11-09 06:57:22,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 06:57:22" (1/1) ... [2024-11-09 06:57:23,042 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 06:57:23,499 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:57:23,514 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 06:57:23,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 06:57:23,628 INFO L204 MainTranslator]: Completed translation [2024-11-09 06:57:23,629 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23 WrapperNode [2024-11-09 06:57:23,629 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 06:57:23,630 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 06:57:23,630 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 06:57:23,630 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 06:57:23,636 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,684 INFO L138 Inliner]: procedures = 279, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 342 [2024-11-09 06:57:23,684 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 06:57:23,685 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 06:57:23,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 06:57:23,685 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 06:57:23,694 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,700 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,700 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,714 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,717 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,720 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,721 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,725 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 06:57:23,725 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 06:57:23,725 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 06:57:23,726 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 06:57:23,726 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (1/1) ... [2024-11-09 06:57:23,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 06:57:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 06:57:23,780 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) [2024-11-09 06:57:23,784 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 [2024-11-09 06:57:23,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-09 06:57:23,823 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-09 06:57:23,823 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 06:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-09 06:57:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 06:57:23,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 06:57:23,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 06:57:23,825 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 06:57:23,963 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 06:57:23,965 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 06:57:24,504 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 06:57:24,504 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 06:57:24,557 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 06:57:24,558 INFO L316 CfgBuilder]: Removed 15 assume(true) statements. [2024-11-09 06:57:24,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:57:24 BoogieIcfgContainer [2024-11-09 06:57:24,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 06:57:24,561 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 06:57:24,562 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 06:57:24,565 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 06:57:24,566 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 06:57:22" (1/3) ... [2024-11-09 06:57:24,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5e16eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:57:24, skipping insertion in model container [2024-11-09 06:57:24,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 06:57:23" (2/3) ... [2024-11-09 06:57:24,567 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5e16eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 06:57:24, skipping insertion in model container [2024-11-09 06:57:24,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 06:57:24" (3/3) ... [2024-11-09 06:57:24,570 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2024-11-09 06:57:24,586 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 06:57:24,587 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-09 06:57:24,587 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 06:57:24,701 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 06:57:24,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 365 transitions, 750 flow [2024-11-09 06:57:24,951 INFO L124 PetriNetUnfolderBase]: 54/688 cut-off events. [2024-11-09 06:57:24,952 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-09 06:57:24,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 688 events. 54/688 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3094 event pairs, 0 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 345. Up to 8 conditions per place. [2024-11-09 06:57:24,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 365 transitions, 750 flow [2024-11-09 06:57:24,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 365 transitions, 750 flow [2024-11-09 06:57:24,979 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:57:24,985 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;@26294a9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:57:24,986 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-09 06:57:24,989 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 06:57:24,990 INFO L124 PetriNetUnfolderBase]: 0/34 cut-off events. [2024-11-09 06:57:24,990 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 06:57:24,990 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 06:57:24,991 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] [2024-11-09 06:57:24,991 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [t2_funErr0ASSERT_VIOLATIONDATA_RACE, t2_funErr1ASSERT_VIOLATIONDATA_RACE, t2_funErr2ASSERT_VIOLATIONDATA_RACE, t2_funErr7ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2024-11-09 06:57:24,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:57:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1216537900, now seen corresponding path program 1 times [2024-11-09 06:57:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 06:57:25,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244800999] [2024-11-09 06:57:25,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:57:25,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:57:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:57:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:57:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 06:57:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244800999] [2024-11-09 06:57:25,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244800999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:57:25,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:57:25,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:57:25,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450652109] [2024-11-09 06:57:25,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:57:25,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:57:25,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 06:57:25,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:57:25,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:57:25,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 365 [2024-11-09 06:57:25,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 365 transitions, 750 flow. Second operand has 3 states, 3 states have (on average 320.3333333333333) internal successors, (961), 3 states have internal predecessors, (961), 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) [2024-11-09 06:57:25,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 06:57:25,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 365 [2024-11-09 06:57:25,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 06:57:25,847 INFO L124 PetriNetUnfolderBase]: 210/2384 cut-off events. [2024-11-09 06:57:25,847 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-11-09 06:57:25,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2772 conditions, 2384 events. 210/2384 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 18177 event pairs, 158 based on Foata normal form. 306/2459 useless extension candidates. Maximal degree in co-relation 1884. Up to 333 conditions per place. [2024-11-09 06:57:25,868 INFO L140 encePairwiseOnDemand]: 345/365 looper letters, 25 selfloop transitions, 2 changer transitions 0/345 dead transitions. [2024-11-09 06:57:25,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 345 transitions, 764 flow [2024-11-09 06:57:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:57:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 06:57:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1002 transitions. [2024-11-09 06:57:25,886 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.915068493150685 [2024-11-09 06:57:25,890 INFO L175 Difference]: Start difference. First operand has 346 places, 365 transitions, 750 flow. Second operand 3 states and 1002 transitions. [2024-11-09 06:57:25,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 345 transitions, 764 flow [2024-11-09 06:57:25,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 345 transitions, 764 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 06:57:25,904 INFO L231 Difference]: Finished difference. Result has 345 places, 345 transitions, 714 flow [2024-11-09 06:57:25,907 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=714, PETRI_PLACES=345, PETRI_TRANSITIONS=345} [2024-11-09 06:57:25,910 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -1 predicate places. [2024-11-09 06:57:25,913 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 345 transitions, 714 flow [2024-11-09 06:57:25,914 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 320.3333333333333) internal successors, (961), 3 states have internal predecessors, (961), 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) [2024-11-09 06:57:25,914 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 06:57:25,914 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] [2024-11-09 06:57:25,914 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 06:57:25,915 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE === [t2_funErr0ASSERT_VIOLATIONDATA_RACE, t2_funErr1ASSERT_VIOLATIONDATA_RACE, t2_funErr2ASSERT_VIOLATIONDATA_RACE, t2_funErr7ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2024-11-09 06:57:25,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:57:25,916 INFO L85 PathProgramCache]: Analyzing trace with hash -699131321, now seen corresponding path program 1 times [2024-11-09 06:57:25,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 06:57:25,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938781297] [2024-11-09 06:57:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:57:25,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:57:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:57:26,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:57:26,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 06:57:26,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938781297] [2024-11-09 06:57:26,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938781297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:57:26,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:57:26,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:57:26,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64749855] [2024-11-09 06:57:26,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:57:26,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:57:26,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 06:57:26,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:57:26,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:57:26,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 365 [2024-11-09 06:57:26,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 345 transitions, 714 flow. Second operand has 3 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 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) [2024-11-09 06:57:26,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 06:57:26,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 365 [2024-11-09 06:57:26,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 06:57:26,306 INFO L124 PetriNetUnfolderBase]: 118/1988 cut-off events. [2024-11-09 06:57:26,307 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-11-09 06:57:26,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2267 conditions, 1988 events. 118/1988 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 12925 event pairs, 84 based on Foata normal form. 0/1796 useless extension candidates. Maximal degree in co-relation 2222. Up to 213 conditions per place. [2024-11-09 06:57:26,327 INFO L140 encePairwiseOnDemand]: 361/365 looper letters, 24 selfloop transitions, 1 changer transitions 0/342 dead transitions. [2024-11-09 06:57:26,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 342 transitions, 758 flow [2024-11-09 06:57:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:57:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 06:57:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2024-11-09 06:57:26,330 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8995433789954338 [2024-11-09 06:57:26,330 INFO L175 Difference]: Start difference. First operand has 345 places, 345 transitions, 714 flow. Second operand 3 states and 985 transitions. [2024-11-09 06:57:26,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 342 transitions, 758 flow [2024-11-09 06:57:26,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 342 transitions, 754 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 06:57:26,336 INFO L231 Difference]: Finished difference. Result has 342 places, 342 transitions, 706 flow [2024-11-09 06:57:26,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=706, PETRI_PLACES=342, PETRI_TRANSITIONS=342} [2024-11-09 06:57:26,337 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -4 predicate places. [2024-11-09 06:57:26,337 INFO L471 AbstractCegarLoop]: Abstraction has has 342 places, 342 transitions, 706 flow [2024-11-09 06:57:26,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 320.0) internal successors, (960), 3 states have internal predecessors, (960), 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) [2024-11-09 06:57:26,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 06:57:26,338 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] [2024-11-09 06:57:26,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 06:57:26,338 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE === [t2_funErr0ASSERT_VIOLATIONDATA_RACE, t2_funErr1ASSERT_VIOLATIONDATA_RACE, t2_funErr2ASSERT_VIOLATIONDATA_RACE, t2_funErr7ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2024-11-09 06:57:26,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:57:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash -781985455, now seen corresponding path program 1 times [2024-11-09 06:57:26,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 06:57:26,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758405102] [2024-11-09 06:57:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:57:26,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:57:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:57:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:57:26,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 06:57:26,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758405102] [2024-11-09 06:57:26,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758405102] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:57:26,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:57:26,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:57:26,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565798973] [2024-11-09 06:57:26,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:57:26,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:57:26,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 06:57:26,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:57:26,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:57:27,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 365 [2024-11-09 06:57:27,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 342 transitions, 706 flow. Second operand has 6 states, 6 states have (on average 255.33333333333334) internal successors, (1532), 6 states have internal predecessors, (1532), 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) [2024-11-09 06:57:27,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 06:57:27,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 365 [2024-11-09 06:57:27,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 06:57:35,541 INFO L124 PetriNetUnfolderBase]: 23473/62611 cut-off events. [2024-11-09 06:57:35,542 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-09 06:57:35,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98504 conditions, 62611 events. 23473/62611 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 734399 event pairs, 22570 based on Foata normal form. 0/58352 useless extension candidates. Maximal degree in co-relation 98460. Up to 35705 conditions per place. [2024-11-09 06:57:36,034 INFO L140 encePairwiseOnDemand]: 359/365 looper letters, 87 selfloop transitions, 5 changer transitions 0/341 dead transitions. [2024-11-09 06:57:36,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 341 transitions, 888 flow [2024-11-09 06:57:36,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:57:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 06:57:36,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2024-11-09 06:57:36,038 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383561643835617 [2024-11-09 06:57:36,038 INFO L175 Difference]: Start difference. First operand has 342 places, 342 transitions, 706 flow. Second operand 6 states and 1617 transitions. [2024-11-09 06:57:36,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 341 transitions, 888 flow [2024-11-09 06:57:36,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 341 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 06:57:36,047 INFO L231 Difference]: Finished difference. Result has 345 places, 341 transitions, 713 flow [2024-11-09 06:57:36,048 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=713, PETRI_PLACES=345, PETRI_TRANSITIONS=341} [2024-11-09 06:57:36,049 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -1 predicate places. [2024-11-09 06:57:36,049 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 341 transitions, 713 flow [2024-11-09 06:57:36,050 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 255.33333333333334) internal successors, (1532), 6 states have internal predecessors, (1532), 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) [2024-11-09 06:57:36,050 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 06:57:36,050 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] [2024-11-09 06:57:36,051 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 06:57:36,051 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE === [t2_funErr0ASSERT_VIOLATIONDATA_RACE, t2_funErr1ASSERT_VIOLATIONDATA_RACE, t2_funErr2ASSERT_VIOLATIONDATA_RACE, t2_funErr7ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2024-11-09 06:57:36,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:57:36,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1311902647, now seen corresponding path program 1 times [2024-11-09 06:57:36,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 06:57:36,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112103574] [2024-11-09 06:57:36,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:57:36,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:57:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:57:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:57:36,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 06:57:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112103574] [2024-11-09 06:57:36,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112103574] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:57:36,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:57:36,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:57:36,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518056924] [2024-11-09 06:57:36,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:57:36,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:57:36,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 06:57:36,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:57:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:57:36,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 365 [2024-11-09 06:57:36,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 341 transitions, 713 flow. Second operand has 6 states, 6 states have (on average 255.33333333333334) internal successors, (1532), 6 states have internal predecessors, (1532), 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) [2024-11-09 06:57:36,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 06:57:36,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 365 [2024-11-09 06:57:36,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 06:57:44,333 INFO L124 PetriNetUnfolderBase]: 23459/62065 cut-off events. [2024-11-09 06:57:44,334 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-09 06:57:44,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98001 conditions, 62065 events. 23459/62065 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 725087 event pairs, 22570 based on Foata normal form. 0/57845 useless extension candidates. Maximal degree in co-relation 97957. Up to 35743 conditions per place. [2024-11-09 06:57:44,752 INFO L140 encePairwiseOnDemand]: 359/365 looper letters, 87 selfloop transitions, 5 changer transitions 0/340 dead transitions. [2024-11-09 06:57:44,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 340 transitions, 895 flow [2024-11-09 06:57:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:57:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 06:57:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2024-11-09 06:57:44,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383561643835617 [2024-11-09 06:57:44,756 INFO L175 Difference]: Start difference. First operand has 345 places, 341 transitions, 713 flow. Second operand 6 states and 1617 transitions. [2024-11-09 06:57:44,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 340 transitions, 895 flow [2024-11-09 06:57:44,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 340 transitions, 885 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 06:57:44,763 INFO L231 Difference]: Finished difference. Result has 344 places, 340 transitions, 711 flow [2024-11-09 06:57:44,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=711, PETRI_PLACES=344, PETRI_TRANSITIONS=340} [2024-11-09 06:57:44,764 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -2 predicate places. [2024-11-09 06:57:44,764 INFO L471 AbstractCegarLoop]: Abstraction has has 344 places, 340 transitions, 711 flow [2024-11-09 06:57:44,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 255.33333333333334) internal successors, (1532), 6 states have internal predecessors, (1532), 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) [2024-11-09 06:57:44,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 06:57:44,766 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] [2024-11-09 06:57:44,767 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 06:57:44,767 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE === [t2_funErr0ASSERT_VIOLATIONDATA_RACE, t2_funErr1ASSERT_VIOLATIONDATA_RACE, t2_funErr2ASSERT_VIOLATIONDATA_RACE, t2_funErr7ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2024-11-09 06:57:44,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:57:44,768 INFO L85 PathProgramCache]: Analyzing trace with hash 493599619, now seen corresponding path program 1 times [2024-11-09 06:57:44,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 06:57:44,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945442310] [2024-11-09 06:57:44,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:57:44,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:57:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:57:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:57:45,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 06:57:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945442310] [2024-11-09 06:57:45,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945442310] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:57:45,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:57:45,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 06:57:45,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249055033] [2024-11-09 06:57:45,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:57:45,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 06:57:45,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 06:57:45,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 06:57:45,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-09 06:57:45,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 365 [2024-11-09 06:57:45,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 340 transitions, 711 flow. Second operand has 6 states, 6 states have (on average 249.83333333333334) internal successors, (1499), 6 states have internal predecessors, (1499), 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) [2024-11-09 06:57:45,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 06:57:45,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 365 [2024-11-09 06:57:45,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 06:57:54,435 INFO L124 PetriNetUnfolderBase]: 27403/71903 cut-off events. [2024-11-09 06:57:54,436 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-09 06:57:54,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113871 conditions, 71903 events. 27403/71903 cut-off events. For 409/409 co-relation queries the response was YES. Maximal size of possible extension queue 1364. Compared 869878 event pairs, 26131 based on Foata normal form. 0/66943 useless extension candidates. Maximal degree in co-relation 113826. Up to 41627 conditions per place. [2024-11-09 06:57:54,897 INFO L140 encePairwiseOnDemand]: 338/365 looper letters, 107 selfloop transitions, 86 changer transitions 0/433 dead transitions. [2024-11-09 06:57:54,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 433 transitions, 1283 flow [2024-11-09 06:57:54,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 06:57:54,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 06:57:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1676 transitions. [2024-11-09 06:57:54,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.765296803652968 [2024-11-09 06:57:54,902 INFO L175 Difference]: Start difference. First operand has 344 places, 340 transitions, 711 flow. Second operand 6 states and 1676 transitions. [2024-11-09 06:57:54,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 433 transitions, 1283 flow [2024-11-09 06:57:54,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 433 transitions, 1273 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 06:57:54,926 INFO L231 Difference]: Finished difference. Result has 349 places, 425 transitions, 1267 flow [2024-11-09 06:57:54,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1267, PETRI_PLACES=349, PETRI_TRANSITIONS=425} [2024-11-09 06:57:54,928 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, 3 predicate places. [2024-11-09 06:57:54,928 INFO L471 AbstractCegarLoop]: Abstraction has has 349 places, 425 transitions, 1267 flow [2024-11-09 06:57:54,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 249.83333333333334) internal successors, (1499), 6 states have internal predecessors, (1499), 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) [2024-11-09 06:57:54,931 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 06:57:54,931 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] [2024-11-09 06:57:54,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 06:57:54,931 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE === [t2_funErr0ASSERT_VIOLATIONDATA_RACE, t2_funErr1ASSERT_VIOLATIONDATA_RACE, t2_funErr2ASSERT_VIOLATIONDATA_RACE, t2_funErr7ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2024-11-09 06:57:54,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:57:54,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1473196444, now seen corresponding path program 1 times [2024-11-09 06:57:54,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 06:57:54,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761423220] [2024-11-09 06:57:54,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:57:54,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:57:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:57:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:57:55,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 06:57:55,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761423220] [2024-11-09 06:57:55,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761423220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:57:55,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:57:55,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 06:57:55,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417244383] [2024-11-09 06:57:55,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:57:55,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:57:55,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 06:57:55,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:57:55,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:57:55,023 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 365 [2024-11-09 06:57:55,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 425 transitions, 1267 flow. Second operand has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 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) [2024-11-09 06:57:55,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 06:57:55,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 365 [2024-11-09 06:57:55,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 06:57:55,620 INFO L124 PetriNetUnfolderBase]: 310/2453 cut-off events. [2024-11-09 06:57:55,620 INFO L125 PetriNetUnfolderBase]: For 211/216 co-relation queries the response was YES. [2024-11-09 06:57:55,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3397 conditions, 2453 events. 310/2453 cut-off events. For 211/216 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 17891 event pairs, 114 based on Foata normal form. 1/2259 useless extension candidates. Maximal degree in co-relation 3348. Up to 251 conditions per place. [2024-11-09 06:57:55,640 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 24 selfloop transitions, 3 changer transitions 0/427 dead transitions. [2024-11-09 06:57:55,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 427 transitions, 1325 flow [2024-11-09 06:57:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 06:57:55,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 06:57:55,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 996 transitions. [2024-11-09 06:57:55,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.9095890410958904 [2024-11-09 06:57:55,648 INFO L175 Difference]: Start difference. First operand has 349 places, 425 transitions, 1267 flow. Second operand 3 states and 996 transitions. [2024-11-09 06:57:55,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 427 transitions, 1325 flow [2024-11-09 06:57:55,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 427 transitions, 1325 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-09 06:57:55,658 INFO L231 Difference]: Finished difference. Result has 352 places, 425 transitions, 1278 flow [2024-11-09 06:57:55,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=365, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1278, PETRI_PLACES=352, PETRI_TRANSITIONS=425} [2024-11-09 06:57:55,660 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, 6 predicate places. [2024-11-09 06:57:55,661 INFO L471 AbstractCegarLoop]: Abstraction has has 352 places, 425 transitions, 1278 flow [2024-11-09 06:57:55,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 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) [2024-11-09 06:57:55,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 06:57:55,662 INFO L204 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, 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] [2024-11-09 06:57:55,663 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 06:57:55,663 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0ASSERT_VIOLATIONDATA_RACE, t2_funErr1ASSERT_VIOLATIONDATA_RACE, t2_funErr2ASSERT_VIOLATIONDATA_RACE, t2_funErr7ASSERT_VIOLATIONDATA_RACE (and 34 more)] === [2024-11-09 06:57:55,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:57:55,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1603318101, now seen corresponding path program 1 times [2024-11-09 06:57:55,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 06:57:55,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876081976] [2024-11-09 06:57:55,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:57:55,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:57:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:57:55,709 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 06:57:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 06:57:55,761 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-09 06:57:55,761 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-09 06:57:55,762 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (37 of 38 remaining) [2024-11-09 06:57:55,764 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONDATA_RACE (36 of 38 remaining) [2024-11-09 06:57:55,764 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONDATA_RACE (35 of 38 remaining) [2024-11-09 06:57:55,765 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONDATA_RACE (34 of 38 remaining) [2024-11-09 06:57:55,765 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7ASSERT_VIOLATIONDATA_RACE (33 of 38 remaining) [2024-11-09 06:57:55,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONDATA_RACE (32 of 38 remaining) [2024-11-09 06:57:55,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5ASSERT_VIOLATIONDATA_RACE (31 of 38 remaining) [2024-11-09 06:57:55,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4ASSERT_VIOLATIONDATA_RACE (30 of 38 remaining) [2024-11-09 06:57:55,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6ASSERT_VIOLATIONDATA_RACE (29 of 38 remaining) [2024-11-09 06:57:55,766 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (28 of 38 remaining) [2024-11-09 06:57:55,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (27 of 38 remaining) [2024-11-09 06:57:55,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (26 of 38 remaining) [2024-11-09 06:57:55,767 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (25 of 38 remaining) [2024-11-09 06:57:55,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (24 of 38 remaining) [2024-11-09 06:57:55,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE (23 of 38 remaining) [2024-11-09 06:57:55,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONDATA_RACE (22 of 38 remaining) [2024-11-09 06:57:55,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONDATA_RACE (21 of 38 remaining) [2024-11-09 06:57:55,768 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 38 remaining) [2024-11-09 06:57:55,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONDATA_RACE (19 of 38 remaining) [2024-11-09 06:57:55,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1ASSERT_VIOLATIONDATA_RACE (18 of 38 remaining) [2024-11-09 06:57:55,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2ASSERT_VIOLATIONDATA_RACE (17 of 38 remaining) [2024-11-09 06:57:55,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3ASSERT_VIOLATIONDATA_RACE (16 of 38 remaining) [2024-11-09 06:57:55,769 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4ASSERT_VIOLATIONDATA_RACE (15 of 38 remaining) [2024-11-09 06:57:55,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5ASSERT_VIOLATIONDATA_RACE (14 of 38 remaining) [2024-11-09 06:57:55,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONDATA_RACE (13 of 38 remaining) [2024-11-09 06:57:55,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONDATA_RACE (12 of 38 remaining) [2024-11-09 06:57:55,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONDATA_RACE (11 of 38 remaining) [2024-11-09 06:57:55,770 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7ASSERT_VIOLATIONDATA_RACE (10 of 38 remaining) [2024-11-09 06:57:55,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONDATA_RACE (9 of 38 remaining) [2024-11-09 06:57:55,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5ASSERT_VIOLATIONDATA_RACE (8 of 38 remaining) [2024-11-09 06:57:55,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4ASSERT_VIOLATIONDATA_RACE (7 of 38 remaining) [2024-11-09 06:57:55,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6ASSERT_VIOLATIONDATA_RACE (6 of 38 remaining) [2024-11-09 06:57:55,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONDATA_RACE (5 of 38 remaining) [2024-11-09 06:57:55,771 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1ASSERT_VIOLATIONDATA_RACE (4 of 38 remaining) [2024-11-09 06:57:55,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2ASSERT_VIOLATIONDATA_RACE (3 of 38 remaining) [2024-11-09 06:57:55,772 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3ASSERT_VIOLATIONDATA_RACE (2 of 38 remaining) [2024-11-09 06:57:55,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4ASSERT_VIOLATIONDATA_RACE (1 of 38 remaining) [2024-11-09 06:57:55,773 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5ASSERT_VIOLATIONDATA_RACE (0 of 38 remaining) [2024-11-09 06:57:55,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 06:57:55,773 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-11-09 06:57:55,778 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-09 06:57:55,779 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-09 06:57:55,891 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-11-09 06:57:55,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 553 places, 588 transitions, 1220 flow [2024-11-09 06:57:56,405 INFO L124 PetriNetUnfolderBase]: 197/1961 cut-off events. [2024-11-09 06:57:56,405 INFO L125 PetriNetUnfolderBase]: For 72/90 co-relation queries the response was YES. [2024-11-09 06:57:56,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 1961 events. 197/1961 cut-off events. For 72/90 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 13395 event pairs, 1 based on Foata normal form. 0/1655 useless extension candidates. Maximal degree in co-relation 1221. Up to 32 conditions per place. [2024-11-09 06:57:56,466 INFO L82 GeneralOperation]: Start removeDead. Operand has 553 places, 588 transitions, 1220 flow [2024-11-09 06:57:56,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 553 places, 588 transitions, 1220 flow [2024-11-09 06:57:56,488 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 06:57:56,489 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;@26294a9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 06:57:56,489 INFO L334 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2024-11-09 06:57:56,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 06:57:56,491 INFO L124 PetriNetUnfolderBase]: 0/34 cut-off events. [2024-11-09 06:57:56,492 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 06:57:56,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 06:57:56,492 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] [2024-11-09 06:57:56,492 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [t2_funErr0ASSERT_VIOLATIONDATA_RACE, t2_funErr1ASSERT_VIOLATIONDATA_RACE, t2_funErr2ASSERT_VIOLATIONDATA_RACE, t2_funErr7ASSERT_VIOLATIONDATA_RACE (and 48 more)] === [2024-11-09 06:57:56,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 06:57:56,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1346620874, now seen corresponding path program 1 times [2024-11-09 06:57:56,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 06:57:56,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49463303] [2024-11-09 06:57:56,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 06:57:56,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 06:57:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 06:57:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 06:57:56,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 06:57:56,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49463303] [2024-11-09 06:57:56,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49463303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 06:57:56,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 06:57:56,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 06:57:56,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975918472] [2024-11-09 06:57:56,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 06:57:56,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 06:57:56,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 06:57:56,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 06:57:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 06:57:56,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 508 out of 588 [2024-11-09 06:57:56,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 588 transitions, 1220 flow. Second operand has 3 states, 3 states have (on average 509.3333333333333) internal successors, (1528), 3 states have internal predecessors, (1528), 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) [2024-11-09 06:57:56,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 06:57:56,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 508 of 588 [2024-11-09 06:57:56,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand