./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 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../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-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 17:54:29,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 17:54:29,921 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2024-11-22 17:54:29,924 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 17:54:29,925 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 17:54:29,950 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 17:54:29,951 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 17:54:29,951 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 17:54:29,952 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 17:54:29,952 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 17:54:29,952 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 17:54:29,953 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 17:54:29,953 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 17:54:29,953 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 17:54:29,954 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-22 17:54:29,954 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 17:54:29,954 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 17:54:29,954 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 17:54:29,955 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 17:54:29,958 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-22 17:54:29,958 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 17:54:29,959 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-22 17:54:29,959 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2024-11-22 17:54:29,961 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 17:54:29,961 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 17:54:29,962 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 17:54:29,962 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-22 17:54:29,962 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 17:54:29,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 17:54:29,966 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 17:54:29,966 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 17:54:29,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 17:54:29,966 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 17:54:29,967 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 17:54:29,967 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-22 17:54:29,967 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 17:54:29,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 17:54:29,968 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 17:54:29,968 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 17:54:29,968 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 17:54:29,969 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 17:54:29,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2024-11-22 17:54:30,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 17:54:30,274 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 17:54:30,276 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 17:54:30,278 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 17:54:30,278 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 17:54:30,279 INFO L431 ainManager$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 [2024-11-22 17:54:31,770 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 17:54:32,089 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 17:54:32,090 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-11-22 17:54:32,110 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d07cd32c/d90cb09b25ec49e7b7c6fbdd3db6554e/FLAGf50ffbcff [2024-11-22 17:54:32,126 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d07cd32c/d90cb09b25ec49e7b7c6fbdd3db6554e [2024-11-22 17:54:32,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 17:54:32,130 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 17:54:32,131 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 17:54:32,131 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 17:54:32,135 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 17:54:32,136 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,137 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c24e97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32, skipping insertion in model container [2024-11-22 17:54:32,137 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,187 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 17:54:32,637 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 17:54:32,656 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 17:54:32,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 17:54:32,803 INFO L204 MainTranslator]: Completed translation [2024-11-22 17:54:32,804 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32 WrapperNode [2024-11-22 17:54:32,804 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 17:54:32,805 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 17:54:32,805 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 17:54:32,805 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 17:54:32,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,843 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,889 INFO L138 Inliner]: procedures = 279, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 342 [2024-11-22 17:54:32,890 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 17:54:32,891 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 17:54:32,891 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 17:54:32,891 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 17:54:32,906 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,907 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,914 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,914 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,947 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,954 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,957 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,959 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,970 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 17:54:32,971 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 17:54:32,971 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 17:54:32,971 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 17:54:32,972 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (1/1) ... [2024-11-22 17:54:32,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 17:54:32,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 17:54:33,010 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) [2024-11-22 17:54:33,018 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 [2024-11-22 17:54:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-22 17:54:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-22 17:54:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-22 17:54:33,070 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-22 17:54:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-22 17:54:33,071 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-22 17:54:33,071 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-22 17:54:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-22 17:54:33,072 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-22 17:54:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-22 17:54:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-22 17:54:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 17:54:33,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 17:54:33,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-22 17:54:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-22 17:54:33,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 17:54:33,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 17:54:33,076 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 17:54:33,249 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 17:54:33,251 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 17:54:33,760 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 17:54:33,761 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 17:54:33,815 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 17:54:33,817 INFO L316 CfgBuilder]: Removed 15 assume(true) statements. [2024-11-22 17:54:33,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:54:33 BoogieIcfgContainer [2024-11-22 17:54:33,818 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 17:54:33,820 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 17:54:33,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 17:54:33,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 17:54:33,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 05:54:32" (1/3) ... [2024-11-22 17:54:33,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231e89c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:54:33, skipping insertion in model container [2024-11-22 17:54:33,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 05:54:32" (2/3) ... [2024-11-22 17:54:33,830 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231e89c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 05:54:33, skipping insertion in model container [2024-11-22 17:54:33,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 05:54:33" (3/3) ... [2024-11-22 17:54:33,832 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2024-11-22 17:54:33,850 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 17:54:33,851 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-22 17:54:33,851 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 17:54:34,069 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-22 17:54:34,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 365 transitions, 750 flow [2024-11-22 17:54:34,341 INFO L124 PetriNetUnfolderBase]: 54/688 cut-off events. [2024-11-22 17:54:34,342 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-22 17:54:34,358 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. [2024-11-22 17:54:34,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 365 transitions, 750 flow [2024-11-22 17:54:34,368 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 365 transitions, 750 flow [2024-11-22 17:54:34,377 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 17:54:34,382 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;@2047364a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 17:54:34,382 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-22 17:54:34,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 17:54:34,388 INFO L124 PetriNetUnfolderBase]: 0/34 cut-off events. [2024-11-22 17:54:34,388 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 17:54:34,388 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 17:54:34,389 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] [2024-11-22 17:54:34,389 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)] === [2024-11-22 17:54:34,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 17:54:34,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1216537900, now seen corresponding path program 1 times [2024-11-22 17:54:34,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 17:54:34,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285475791] [2024-11-22 17:54:34,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 17:54:34,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 17:54:34,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 17:54:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 17:54:34,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 17:54:34,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285475791] [2024-11-22 17:54:34,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285475791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 17:54:34,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 17:54:34,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 17:54:34,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720757468] [2024-11-22 17:54:34,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 17:54:34,748 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 17:54:34,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 17:54:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 17:54:34,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 17:54:34,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 365 [2024-11-22 17:54:34,838 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) [2024-11-22 17:54:34,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 17:54:34,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 365 [2024-11-22 17:54:34,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 17:54:35,381 INFO L124 PetriNetUnfolderBase]: 210/2384 cut-off events. [2024-11-22 17:54:35,382 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-11-22 17:54:35,399 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. [2024-11-22 17:54:35,410 INFO L140 encePairwiseOnDemand]: 345/365 looper letters, 25 selfloop transitions, 2 changer transitions 0/345 dead transitions. [2024-11-22 17:54:35,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 345 transitions, 764 flow [2024-11-22 17:54:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 17:54:35,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 17:54:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1002 transitions. [2024-11-22 17:54:35,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.915068493150685 [2024-11-22 17:54:35,434 INFO L175 Difference]: Start difference. First operand has 346 places, 365 transitions, 750 flow. Second operand 3 states and 1002 transitions. [2024-11-22 17:54:35,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 345 transitions, 764 flow [2024-11-22 17:54:35,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 345 transitions, 764 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 17:54:35,447 INFO L231 Difference]: Finished difference. Result has 345 places, 345 transitions, 714 flow [2024-11-22 17:54:35,450 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} [2024-11-22 17:54:35,455 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -1 predicate places. [2024-11-22 17:54:35,456 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 345 transitions, 714 flow [2024-11-22 17:54:35,457 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) [2024-11-22 17:54:35,457 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 17:54:35,457 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] [2024-11-22 17:54:35,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 17:54:35,458 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)] === [2024-11-22 17:54:35,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 17:54:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash -699131321, now seen corresponding path program 1 times [2024-11-22 17:54:35,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 17:54:35,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604846272] [2024-11-22 17:54:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 17:54:35,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 17:54:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 17:54:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 17:54:35,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 17:54:35,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604846272] [2024-11-22 17:54:35,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604846272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 17:54:35,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 17:54:35,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 17:54:35,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704970144] [2024-11-22 17:54:35,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 17:54:35,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 17:54:35,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 17:54:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 17:54:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 17:54:35,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 365 [2024-11-22 17:54:35,587 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) [2024-11-22 17:54:35,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 17:54:35,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 365 [2024-11-22 17:54:35,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 17:54:36,002 INFO L124 PetriNetUnfolderBase]: 118/1988 cut-off events. [2024-11-22 17:54:36,003 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-11-22 17:54:36,013 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. [2024-11-22 17:54:36,022 INFO L140 encePairwiseOnDemand]: 361/365 looper letters, 24 selfloop transitions, 1 changer transitions 0/342 dead transitions. [2024-11-22 17:54:36,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 342 transitions, 758 flow [2024-11-22 17:54:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 17:54:36,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 17:54:36,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2024-11-22 17:54:36,026 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8995433789954338 [2024-11-22 17:54:36,026 INFO L175 Difference]: Start difference. First operand has 345 places, 345 transitions, 714 flow. Second operand 3 states and 985 transitions. [2024-11-22 17:54:36,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 342 transitions, 758 flow [2024-11-22 17:54:36,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 342 transitions, 754 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 17:54:36,037 INFO L231 Difference]: Finished difference. Result has 342 places, 342 transitions, 706 flow [2024-11-22 17:54:36,038 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} [2024-11-22 17:54:36,039 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -4 predicate places. [2024-11-22 17:54:36,039 INFO L471 AbstractCegarLoop]: Abstraction has has 342 places, 342 transitions, 706 flow [2024-11-22 17:54:36,040 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) [2024-11-22 17:54:36,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 17:54:36,040 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] [2024-11-22 17:54:36,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 17:54:36,041 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)] === [2024-11-22 17:54:36,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 17:54:36,042 INFO L85 PathProgramCache]: Analyzing trace with hash -781985455, now seen corresponding path program 1 times [2024-11-22 17:54:36,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 17:54:36,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771139098] [2024-11-22 17:54:36,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 17:54:36,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 17:54:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 17:54:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 17:54:36,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 17:54:36,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771139098] [2024-11-22 17:54:36,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771139098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 17:54:36,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 17:54:36,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 17:54:36,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022329285] [2024-11-22 17:54:36,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 17:54:36,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 17:54:36,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 17:54:36,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 17:54:36,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-22 17:54:36,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 365 [2024-11-22 17:54:36,985 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) [2024-11-22 17:54:36,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 17:54:36,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 365 [2024-11-22 17:54:36,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 17:54:45,746 INFO L124 PetriNetUnfolderBase]: 23473/62611 cut-off events. [2024-11-22 17:54:45,747 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-22 17:54:45,960 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. [2024-11-22 17:54:46,265 INFO L140 encePairwiseOnDemand]: 359/365 looper letters, 87 selfloop transitions, 5 changer transitions 0/341 dead transitions. [2024-11-22 17:54:46,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 341 transitions, 888 flow [2024-11-22 17:54:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 17:54:46,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 17:54:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2024-11-22 17:54:46,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383561643835617 [2024-11-22 17:54:46,271 INFO L175 Difference]: Start difference. First operand has 342 places, 342 transitions, 706 flow. Second operand 6 states and 1617 transitions. [2024-11-22 17:54:46,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 341 transitions, 888 flow [2024-11-22 17:54:46,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 341 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 17:54:46,287 INFO L231 Difference]: Finished difference. Result has 345 places, 341 transitions, 713 flow [2024-11-22 17:54:46,288 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} [2024-11-22 17:54:46,289 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -1 predicate places. [2024-11-22 17:54:46,289 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 341 transitions, 713 flow [2024-11-22 17:54:46,291 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) [2024-11-22 17:54:46,291 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 17:54:46,291 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] [2024-11-22 17:54:46,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 17:54:46,292 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)] === [2024-11-22 17:54:46,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 17:54:46,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1311902647, now seen corresponding path program 1 times [2024-11-22 17:54:46,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 17:54:46,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266297094] [2024-11-22 17:54:46,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 17:54:46,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 17:54:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 17:54:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 17:54:46,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 17:54:46,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266297094] [2024-11-22 17:54:46,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266297094] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 17:54:46,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 17:54:46,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 17:54:46,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692022575] [2024-11-22 17:54:46,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 17:54:46,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 17:54:46,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 17:54:46,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 17:54:46,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-22 17:54:47,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 365 [2024-11-22 17:54:47,215 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) [2024-11-22 17:54:47,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 17:54:47,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 365 [2024-11-22 17:54:47,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 17:54:54,891 INFO L124 PetriNetUnfolderBase]: 23459/62065 cut-off events. [2024-11-22 17:54:54,892 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-22 17:54:55,056 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. [2024-11-22 17:54:55,285 INFO L140 encePairwiseOnDemand]: 359/365 looper letters, 87 selfloop transitions, 5 changer transitions 0/340 dead transitions. [2024-11-22 17:54:55,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 340 transitions, 895 flow [2024-11-22 17:54:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 17:54:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 17:54:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2024-11-22 17:54:55,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383561643835617 [2024-11-22 17:54:55,289 INFO L175 Difference]: Start difference. First operand has 345 places, 341 transitions, 713 flow. Second operand 6 states and 1617 transitions. [2024-11-22 17:54:55,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 340 transitions, 895 flow [2024-11-22 17:54:55,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 340 transitions, 885 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 17:54:55,300 INFO L231 Difference]: Finished difference. Result has 344 places, 340 transitions, 711 flow [2024-11-22 17:54:55,301 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} [2024-11-22 17:54:55,303 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -2 predicate places. [2024-11-22 17:54:55,303 INFO L471 AbstractCegarLoop]: Abstraction has has 344 places, 340 transitions, 711 flow [2024-11-22 17:54:55,304 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) [2024-11-22 17:54:55,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 17:54:55,304 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] [2024-11-22 17:54:55,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 17:54:55,304 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)] === [2024-11-22 17:54:55,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 17:54:55,305 INFO L85 PathProgramCache]: Analyzing trace with hash 493599619, now seen corresponding path program 1 times [2024-11-22 17:54:55,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 17:54:55,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439387647] [2024-11-22 17:54:55,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 17:54:55,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 17:54:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 17:54:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 17:54:55,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 17:54:55,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439387647] [2024-11-22 17:54:55,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439387647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 17:54:55,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 17:54:55,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 17:54:55,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130993492] [2024-11-22 17:54:55,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 17:54:55,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 17:54:55,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 17:54:55,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 17:54:55,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-22 17:54:56,081 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 365 [2024-11-22 17:54:56,083 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) [2024-11-22 17:54:56,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 17:54:56,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 365 [2024-11-22 17:54:56,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 17:55:05,102 INFO L124 PetriNetUnfolderBase]: 27403/71903 cut-off events. [2024-11-22 17:55:05,103 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-22 17:55:05,295 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. [2024-11-22 17:55:05,555 INFO L140 encePairwiseOnDemand]: 338/365 looper letters, 107 selfloop transitions, 86 changer transitions 0/433 dead transitions. [2024-11-22 17:55:05,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 433 transitions, 1283 flow [2024-11-22 17:55:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 17:55:05,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 17:55:05,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1676 transitions. [2024-11-22 17:55:05,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.765296803652968 [2024-11-22 17:55:05,560 INFO L175 Difference]: Start difference. First operand has 344 places, 340 transitions, 711 flow. Second operand 6 states and 1676 transitions. [2024-11-22 17:55:05,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 433 transitions, 1283 flow [2024-11-22 17:55:05,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 433 transitions, 1273 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 17:55:05,576 INFO L231 Difference]: Finished difference. Result has 349 places, 425 transitions, 1267 flow [2024-11-22 17:55:05,577 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} [2024-11-22 17:55:05,579 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, 3 predicate places. [2024-11-22 17:55:05,580 INFO L471 AbstractCegarLoop]: Abstraction has has 349 places, 425 transitions, 1267 flow [2024-11-22 17:55:05,581 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) [2024-11-22 17:55:05,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 17:55:05,581 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] [2024-11-22 17:55:05,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 17:55:05,582 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)] === [2024-11-22 17:55:05,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 17:55:05,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1473196444, now seen corresponding path program 1 times [2024-11-22 17:55:05,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 17:55:05,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446574662] [2024-11-22 17:55:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 17:55:05,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 17:55:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 17:55:05,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 17:55:05,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 17:55:05,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446574662] [2024-11-22 17:55:05,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446574662] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 17:55:05,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 17:55:05,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 17:55:05,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718816873] [2024-11-22 17:55:05,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 17:55:05,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 17:55:05,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 17:55:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 17:55:05,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 17:55:05,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 365 [2024-11-22 17:55:05,717 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) [2024-11-22 17:55:05,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 17:55:05,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 365 [2024-11-22 17:55:05,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 17:55:06,043 INFO L124 PetriNetUnfolderBase]: 310/2453 cut-off events. [2024-11-22 17:55:06,044 INFO L125 PetriNetUnfolderBase]: For 211/216 co-relation queries the response was YES. [2024-11-22 17:55:06,060 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. [2024-11-22 17:55:06,068 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 24 selfloop transitions, 3 changer transitions 0/427 dead transitions. [2024-11-22 17:55:06,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 427 transitions, 1325 flow [2024-11-22 17:55:06,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 17:55:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 17:55:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 996 transitions. [2024-11-22 17:55:06,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.9095890410958904 [2024-11-22 17:55:06,072 INFO L175 Difference]: Start difference. First operand has 349 places, 425 transitions, 1267 flow. Second operand 3 states and 996 transitions. [2024-11-22 17:55:06,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 427 transitions, 1325 flow [2024-11-22 17:55:06,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 427 transitions, 1325 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 17:55:06,083 INFO L231 Difference]: Finished difference. Result has 352 places, 425 transitions, 1278 flow [2024-11-22 17:55:06,083 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} [2024-11-22 17:55:06,086 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, 6 predicate places. [2024-11-22 17:55:06,086 INFO L471 AbstractCegarLoop]: Abstraction has has 352 places, 425 transitions, 1278 flow [2024-11-22 17:55:06,087 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) [2024-11-22 17:55:06,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 17:55:06,087 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] [2024-11-22 17:55:06,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 17:55:06,088 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)] === [2024-11-22 17:55:06,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 17:55:06,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1603318101, now seen corresponding path program 1 times [2024-11-22 17:55:06,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 17:55:06,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809803149] [2024-11-22 17:55:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 17:55:06,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 17:55:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 17:55:06,414 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-22 17:55:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-22 17:55:06,481 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-22 17:55:06,481 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-22 17:55:06,482 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (37 of 38 remaining) [2024-11-22 17:55:06,484 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONDATA_RACE (36 of 38 remaining) [2024-11-22 17:55:06,485 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONDATA_RACE (35 of 38 remaining) [2024-11-22 17:55:06,485 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONDATA_RACE (34 of 38 remaining) [2024-11-22 17:55:06,487 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7ASSERT_VIOLATIONDATA_RACE (33 of 38 remaining) [2024-11-22 17:55:06,487 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONDATA_RACE (32 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5ASSERT_VIOLATIONDATA_RACE (31 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4ASSERT_VIOLATIONDATA_RACE (30 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6ASSERT_VIOLATIONDATA_RACE (29 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (28 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (27 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (26 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (25 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (24 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE (23 of 38 remaining) [2024-11-22 17:55:06,488 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONDATA_RACE (22 of 38 remaining) [2024-11-22 17:55:06,489 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONDATA_RACE (21 of 38 remaining) [2024-11-22 17:55:06,489 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 38 remaining) [2024-11-22 17:55:06,489 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONDATA_RACE (19 of 38 remaining) [2024-11-22 17:55:06,489 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1ASSERT_VIOLATIONDATA_RACE (18 of 38 remaining) [2024-11-22 17:55:06,489 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2ASSERT_VIOLATIONDATA_RACE (17 of 38 remaining) [2024-11-22 17:55:06,489 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3ASSERT_VIOLATIONDATA_RACE (16 of 38 remaining) [2024-11-22 17:55:06,489 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4ASSERT_VIOLATIONDATA_RACE (15 of 38 remaining) [2024-11-22 17:55:06,489 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5ASSERT_VIOLATIONDATA_RACE (14 of 38 remaining) [2024-11-22 17:55:06,489 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONDATA_RACE (13 of 38 remaining) [2024-11-22 17:55:06,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONDATA_RACE (12 of 38 remaining) [2024-11-22 17:55:06,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONDATA_RACE (11 of 38 remaining) [2024-11-22 17:55:06,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7ASSERT_VIOLATIONDATA_RACE (10 of 38 remaining) [2024-11-22 17:55:06,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONDATA_RACE (9 of 38 remaining) [2024-11-22 17:55:06,490 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5ASSERT_VIOLATIONDATA_RACE (8 of 38 remaining) [2024-11-22 17:55:06,493 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4ASSERT_VIOLATIONDATA_RACE (7 of 38 remaining) [2024-11-22 17:55:06,493 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6ASSERT_VIOLATIONDATA_RACE (6 of 38 remaining) [2024-11-22 17:55:06,494 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONDATA_RACE (5 of 38 remaining) [2024-11-22 17:55:06,494 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1ASSERT_VIOLATIONDATA_RACE (4 of 38 remaining) [2024-11-22 17:55:06,494 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2ASSERT_VIOLATIONDATA_RACE (3 of 38 remaining) [2024-11-22 17:55:06,495 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3ASSERT_VIOLATIONDATA_RACE (2 of 38 remaining) [2024-11-22 17:55:06,495 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4ASSERT_VIOLATIONDATA_RACE (1 of 38 remaining) [2024-11-22 17:55:06,495 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5ASSERT_VIOLATIONDATA_RACE (0 of 38 remaining) [2024-11-22 17:55:06,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 17:55:06,498 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-11-22 17:55:06,501 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-22 17:55:06,502 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-22 17:55:06,614 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-11-22 17:55:06,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 553 places, 588 transitions, 1220 flow [2024-11-22 17:55:07,000 INFO L124 PetriNetUnfolderBase]: 197/1961 cut-off events. [2024-11-22 17:55:07,000 INFO L125 PetriNetUnfolderBase]: For 72/90 co-relation queries the response was YES. [2024-11-22 17:55:07,066 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. [2024-11-22 17:55:07,067 INFO L82 GeneralOperation]: Start removeDead. Operand has 553 places, 588 transitions, 1220 flow [2024-11-22 17:55:07,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 553 places, 588 transitions, 1220 flow [2024-11-22 17:55:07,088 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 17:55:07,089 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;@2047364a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 17:55:07,089 INFO L334 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2024-11-22 17:55:07,091 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 17:55:07,091 INFO L124 PetriNetUnfolderBase]: 0/34 cut-off events. [2024-11-22 17:55:07,091 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 17:55:07,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 17:55:07,091 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] [2024-11-22 17:55:07,092 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)] === [2024-11-22 17:55:07,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 17:55:07,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1346620874, now seen corresponding path program 1 times [2024-11-22 17:55:07,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 17:55:07,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060113574] [2024-11-22 17:55:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 17:55:07,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 17:55:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 17:55:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 17:55:07,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 17:55:07,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060113574] [2024-11-22 17:55:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060113574] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 17:55:07,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 17:55:07,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 17:55:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31447177] [2024-11-22 17:55:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 17:55:07,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 17:55:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 17:55:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 17:55:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 17:55:07,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 508 out of 588 [2024-11-22 17:55:07,149 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) [2024-11-22 17:55:07,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 17:55:07,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 508 of 588 [2024-11-22 17:55:07,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand