./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 3061b6dc 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-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 05:55:03,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 05:55:04,052 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2024-11-19 05:55:04,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 05:55:04,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 05:55:04,091 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 05:55:04,091 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 05:55:04,092 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 05:55:04,092 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 05:55:04,093 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 05:55:04,093 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 05:55:04,094 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 05:55:04,094 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 05:55:04,097 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 05:55:04,098 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-19 05:55:04,098 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 05:55:04,099 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 05:55:04,099 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 05:55:04,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 05:55:04,103 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-19 05:55:04,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 05:55:04,104 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-19 05:55:04,104 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2024-11-19 05:55:04,105 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 05:55:04,105 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 05:55:04,105 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 05:55:04,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-19 05:55:04,105 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 05:55:04,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 05:55:04,106 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 05:55:04,106 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 05:55:04,106 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 05:55:04,107 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 05:55:04,107 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 05:55:04,107 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-19 05:55:04,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 05:55:04,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 05:55:04,115 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 05:55:04,115 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 05:55:04,115 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 05:55:04,115 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 05:55:04,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ac894f5c6207d1329786eb676509b79ca36f8c33f880cc59ffa30652ab92765 [2024-11-19 05:55:04,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 05:55:04,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 05:55:04,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 05:55:04,401 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 05:55:04,402 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 05:55:04,403 INFO L431 ainManager$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 [2024-11-19 05:55:05,924 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 05:55:06,195 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 05:55:06,196 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_82-list_racefree.i [2024-11-19 05:55:06,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc52c5d1/b0caeb21ca3d49bbbf1e091c82d02896/FLAGc53cd395f [2024-11-19 05:55:06,233 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2dc52c5d1/b0caeb21ca3d49bbbf1e091c82d02896 [2024-11-19 05:55:06,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 05:55:06,237 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 05:55:06,239 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 05:55:06,239 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 05:55:06,244 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 05:55:06,247 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:06,248 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@706b19e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06, skipping insertion in model container [2024-11-19 05:55:06,248 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:06,298 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 05:55:06,767 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 05:55:06,789 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 05:55:06,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 05:55:06,942 INFO L204 MainTranslator]: Completed translation [2024-11-19 05:55:06,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06 WrapperNode [2024-11-19 05:55:06,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 05:55:06,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 05:55:06,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 05:55:06,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 05:55:06,952 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:06,982 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,030 INFO L138 Inliner]: procedures = 279, calls = 68, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 342 [2024-11-19 05:55:07,034 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 05:55:07,035 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 05:55:07,035 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 05:55:07,035 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 05:55:07,045 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,052 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,052 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,080 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,106 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 05:55:07,107 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 05:55:07,107 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 05:55:07,107 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 05:55:07,108 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (1/1) ... [2024-11-19 05:55:07,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 05:55:07,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 05:55:07,143 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) [2024-11-19 05:55:07,150 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 [2024-11-19 05:55:07,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-19 05:55:07,194 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-19 05:55:07,194 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2024-11-19 05:55:07,194 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2024-11-19 05:55:07,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-19 05:55:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-19 05:55:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-19 05:55:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2024-11-19 05:55:07,195 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2024-11-19 05:55:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-19 05:55:07,195 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-19 05:55:07,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 05:55:07,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 05:55:07,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-19 05:55:07,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-19 05:55:07,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 05:55:07,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 05:55:07,198 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 05:55:07,351 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 05:55:07,353 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 05:55:07,990 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 05:55:07,990 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 05:55:08,032 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 05:55:08,036 INFO L316 CfgBuilder]: Removed 15 assume(true) statements. [2024-11-19 05:55:08,036 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:55:08 BoogieIcfgContainer [2024-11-19 05:55:08,037 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 05:55:08,039 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 05:55:08,039 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 05:55:08,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 05:55:08,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:55:06" (1/3) ... [2024-11-19 05:55:08,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595c5128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:55:08, skipping insertion in model container [2024-11-19 05:55:08,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:55:06" (2/3) ... [2024-11-19 05:55:08,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@595c5128 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:55:08, skipping insertion in model container [2024-11-19 05:55:08,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:55:08" (3/3) ... [2024-11-19 05:55:08,048 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_82-list_racefree.i [2024-11-19 05:55:08,065 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 05:55:08,066 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-19 05:55:08,066 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 05:55:08,207 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-19 05:55:08,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 365 transitions, 750 flow [2024-11-19 05:55:08,526 INFO L124 PetriNetUnfolderBase]: 54/688 cut-off events. [2024-11-19 05:55:08,527 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-19 05:55:08,544 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. [2024-11-19 05:55:08,544 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 365 transitions, 750 flow [2024-11-19 05:55:08,556 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 365 transitions, 750 flow [2024-11-19 05:55:08,572 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 05:55:08,582 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;@483b853a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 05:55:08,583 INFO L334 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2024-11-19 05:55:08,589 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 05:55:08,590 INFO L124 PetriNetUnfolderBase]: 0/34 cut-off events. [2024-11-19 05:55:08,590 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 05:55:08,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 05:55:08,594 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] [2024-11-19 05:55:08,594 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)] === [2024-11-19 05:55:08,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 05:55:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1216537900, now seen corresponding path program 1 times [2024-11-19 05:55:08,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 05:55:08,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676766034] [2024-11-19 05:55:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 05:55:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 05:55:08,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 05:55:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 05:55:08,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 05:55:08,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676766034] [2024-11-19 05:55:08,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676766034] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 05:55:08,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 05:55:08,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 05:55:08,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436159618] [2024-11-19 05:55:08,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 05:55:08,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 05:55:08,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 05:55:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 05:55:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 05:55:09,031 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 365 [2024-11-19 05:55:09,042 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) [2024-11-19 05:55:09,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 05:55:09,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 365 [2024-11-19 05:55:09,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 05:55:09,597 INFO L124 PetriNetUnfolderBase]: 210/2384 cut-off events. [2024-11-19 05:55:09,598 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2024-11-19 05:55:09,612 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. [2024-11-19 05:55:09,625 INFO L140 encePairwiseOnDemand]: 345/365 looper letters, 25 selfloop transitions, 2 changer transitions 0/345 dead transitions. [2024-11-19 05:55:09,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 345 transitions, 764 flow [2024-11-19 05:55:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 05:55:09,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 05:55:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1002 transitions. [2024-11-19 05:55:09,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.915068493150685 [2024-11-19 05:55:09,650 INFO L175 Difference]: Start difference. First operand has 346 places, 365 transitions, 750 flow. Second operand 3 states and 1002 transitions. [2024-11-19 05:55:09,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 345 transitions, 764 flow [2024-11-19 05:55:09,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 345 transitions, 764 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 05:55:09,664 INFO L231 Difference]: Finished difference. Result has 345 places, 345 transitions, 714 flow [2024-11-19 05:55:09,667 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} [2024-11-19 05:55:09,673 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -1 predicate places. [2024-11-19 05:55:09,673 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 345 transitions, 714 flow [2024-11-19 05:55:09,674 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) [2024-11-19 05:55:09,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 05:55:09,674 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] [2024-11-19 05:55:09,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 05:55:09,675 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)] === [2024-11-19 05:55:09,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 05:55:09,675 INFO L85 PathProgramCache]: Analyzing trace with hash -699131321, now seen corresponding path program 1 times [2024-11-19 05:55:09,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 05:55:09,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091043848] [2024-11-19 05:55:09,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 05:55:09,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 05:55:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 05:55:09,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 05:55:09,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 05:55:09,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091043848] [2024-11-19 05:55:09,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091043848] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 05:55:09,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 05:55:09,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 05:55:09,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042558524] [2024-11-19 05:55:09,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 05:55:09,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 05:55:09,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 05:55:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 05:55:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 05:55:09,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 319 out of 365 [2024-11-19 05:55:09,819 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) [2024-11-19 05:55:09,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 05:55:09,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 319 of 365 [2024-11-19 05:55:09,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 05:55:10,210 INFO L124 PetriNetUnfolderBase]: 118/1988 cut-off events. [2024-11-19 05:55:10,210 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-11-19 05:55:10,221 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. [2024-11-19 05:55:10,228 INFO L140 encePairwiseOnDemand]: 361/365 looper letters, 24 selfloop transitions, 1 changer transitions 0/342 dead transitions. [2024-11-19 05:55:10,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 342 transitions, 758 flow [2024-11-19 05:55:10,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 05:55:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 05:55:10,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 985 transitions. [2024-11-19 05:55:10,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.8995433789954338 [2024-11-19 05:55:10,232 INFO L175 Difference]: Start difference. First operand has 345 places, 345 transitions, 714 flow. Second operand 3 states and 985 transitions. [2024-11-19 05:55:10,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 342 transitions, 758 flow [2024-11-19 05:55:10,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 342 transitions, 754 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 05:55:10,243 INFO L231 Difference]: Finished difference. Result has 342 places, 342 transitions, 706 flow [2024-11-19 05:55:10,244 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} [2024-11-19 05:55:10,245 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -4 predicate places. [2024-11-19 05:55:10,245 INFO L471 AbstractCegarLoop]: Abstraction has has 342 places, 342 transitions, 706 flow [2024-11-19 05:55:10,246 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) [2024-11-19 05:55:10,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 05:55:10,246 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] [2024-11-19 05:55:10,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 05:55:10,247 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)] === [2024-11-19 05:55:10,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 05:55:10,248 INFO L85 PathProgramCache]: Analyzing trace with hash -781985455, now seen corresponding path program 1 times [2024-11-19 05:55:10,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 05:55:10,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779025697] [2024-11-19 05:55:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 05:55:10,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 05:55:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 05:55:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 05:55:10,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 05:55:10,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779025697] [2024-11-19 05:55:10,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779025697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 05:55:10,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 05:55:10,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 05:55:10,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197980039] [2024-11-19 05:55:10,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 05:55:10,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 05:55:10,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 05:55:10,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 05:55:10,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-19 05:55:11,195 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 365 [2024-11-19 05:55:11,197 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) [2024-11-19 05:55:11,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 05:55:11,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 365 [2024-11-19 05:55:11,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 05:55:20,451 INFO L124 PetriNetUnfolderBase]: 23473/62611 cut-off events. [2024-11-19 05:55:20,451 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-19 05:55:20,670 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. [2024-11-19 05:55:20,944 INFO L140 encePairwiseOnDemand]: 359/365 looper letters, 87 selfloop transitions, 5 changer transitions 0/341 dead transitions. [2024-11-19 05:55:20,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 341 transitions, 888 flow [2024-11-19 05:55:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 05:55:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 05:55:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2024-11-19 05:55:20,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383561643835617 [2024-11-19 05:55:20,949 INFO L175 Difference]: Start difference. First operand has 342 places, 342 transitions, 706 flow. Second operand 6 states and 1617 transitions. [2024-11-19 05:55:20,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 341 transitions, 888 flow [2024-11-19 05:55:20,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 341 transitions, 887 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 05:55:20,963 INFO L231 Difference]: Finished difference. Result has 345 places, 341 transitions, 713 flow [2024-11-19 05:55:20,964 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} [2024-11-19 05:55:20,966 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -1 predicate places. [2024-11-19 05:55:20,966 INFO L471 AbstractCegarLoop]: Abstraction has has 345 places, 341 transitions, 713 flow [2024-11-19 05:55:20,967 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) [2024-11-19 05:55:20,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 05:55:20,967 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] [2024-11-19 05:55:20,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 05:55:20,968 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)] === [2024-11-19 05:55:20,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 05:55:20,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1311902647, now seen corresponding path program 1 times [2024-11-19 05:55:20,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 05:55:20,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592962810] [2024-11-19 05:55:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 05:55:20,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 05:55:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 05:55:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 05:55:21,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 05:55:21,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592962810] [2024-11-19 05:55:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592962810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 05:55:21,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 05:55:21,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 05:55:21,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676764839] [2024-11-19 05:55:21,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 05:55:21,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 05:55:21,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 05:55:21,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 05:55:21,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-19 05:55:21,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 365 [2024-11-19 05:55:21,756 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) [2024-11-19 05:55:21,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 05:55:21,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 365 [2024-11-19 05:55:21,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 05:55:29,515 INFO L124 PetriNetUnfolderBase]: 23459/62065 cut-off events. [2024-11-19 05:55:29,515 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-19 05:55:29,679 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. [2024-11-19 05:55:29,903 INFO L140 encePairwiseOnDemand]: 359/365 looper letters, 87 selfloop transitions, 5 changer transitions 0/340 dead transitions. [2024-11-19 05:55:29,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 340 transitions, 895 flow [2024-11-19 05:55:29,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 05:55:29,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 05:55:29,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1617 transitions. [2024-11-19 05:55:29,907 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7383561643835617 [2024-11-19 05:55:29,908 INFO L175 Difference]: Start difference. First operand has 345 places, 341 transitions, 713 flow. Second operand 6 states and 1617 transitions. [2024-11-19 05:55:29,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 340 transitions, 895 flow [2024-11-19 05:55:29,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 340 transitions, 885 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 05:55:29,918 INFO L231 Difference]: Finished difference. Result has 344 places, 340 transitions, 711 flow [2024-11-19 05:55:29,919 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} [2024-11-19 05:55:29,921 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, -2 predicate places. [2024-11-19 05:55:29,921 INFO L471 AbstractCegarLoop]: Abstraction has has 344 places, 340 transitions, 711 flow [2024-11-19 05:55:29,922 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) [2024-11-19 05:55:29,922 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 05:55:29,923 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] [2024-11-19 05:55:29,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 05:55:29,924 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)] === [2024-11-19 05:55:29,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 05:55:29,925 INFO L85 PathProgramCache]: Analyzing trace with hash 493599619, now seen corresponding path program 1 times [2024-11-19 05:55:29,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 05:55:29,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693239582] [2024-11-19 05:55:29,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 05:55:29,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 05:55:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 05:55:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 05:55:30,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 05:55:30,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693239582] [2024-11-19 05:55:30,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693239582] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 05:55:30,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 05:55:30,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 05:55:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528369880] [2024-11-19 05:55:30,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 05:55:30,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 05:55:30,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 05:55:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 05:55:30,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-19 05:55:30,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 365 [2024-11-19 05:55:30,671 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) [2024-11-19 05:55:30,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 05:55:30,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 365 [2024-11-19 05:55:30,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 05:55:39,759 INFO L124 PetriNetUnfolderBase]: 27403/71903 cut-off events. [2024-11-19 05:55:39,759 INFO L125 PetriNetUnfolderBase]: For 409/409 co-relation queries the response was YES. [2024-11-19 05:55:39,977 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. [2024-11-19 05:55:40,314 INFO L140 encePairwiseOnDemand]: 338/365 looper letters, 107 selfloop transitions, 86 changer transitions 0/433 dead transitions. [2024-11-19 05:55:40,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 433 transitions, 1283 flow [2024-11-19 05:55:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 05:55:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 05:55:40,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1676 transitions. [2024-11-19 05:55:40,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.765296803652968 [2024-11-19 05:55:40,319 INFO L175 Difference]: Start difference. First operand has 344 places, 340 transitions, 711 flow. Second operand 6 states and 1676 transitions. [2024-11-19 05:55:40,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 433 transitions, 1283 flow [2024-11-19 05:55:40,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 433 transitions, 1273 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 05:55:40,341 INFO L231 Difference]: Finished difference. Result has 349 places, 425 transitions, 1267 flow [2024-11-19 05:55:40,342 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} [2024-11-19 05:55:40,344 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, 3 predicate places. [2024-11-19 05:55:40,344 INFO L471 AbstractCegarLoop]: Abstraction has has 349 places, 425 transitions, 1267 flow [2024-11-19 05:55:40,346 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) [2024-11-19 05:55:40,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 05:55:40,346 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] [2024-11-19 05:55:40,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 05:55:40,347 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)] === [2024-11-19 05:55:40,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 05:55:40,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1473196444, now seen corresponding path program 1 times [2024-11-19 05:55:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 05:55:40,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751136187] [2024-11-19 05:55:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 05:55:40,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 05:55:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 05:55:40,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 05:55:40,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 05:55:40,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751136187] [2024-11-19 05:55:40,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751136187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 05:55:40,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 05:55:40,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 05:55:40,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848937569] [2024-11-19 05:55:40,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 05:55:40,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 05:55:40,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 05:55:40,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 05:55:40,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 05:55:40,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 365 [2024-11-19 05:55:40,475 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) [2024-11-19 05:55:40,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 05:55:40,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 365 [2024-11-19 05:55:40,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 05:55:41,138 INFO L124 PetriNetUnfolderBase]: 310/2453 cut-off events. [2024-11-19 05:55:41,139 INFO L125 PetriNetUnfolderBase]: For 211/216 co-relation queries the response was YES. [2024-11-19 05:55:41,158 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. [2024-11-19 05:55:41,166 INFO L140 encePairwiseOnDemand]: 362/365 looper letters, 24 selfloop transitions, 3 changer transitions 0/427 dead transitions. [2024-11-19 05:55:41,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 427 transitions, 1325 flow [2024-11-19 05:55:41,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 05:55:41,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 05:55:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 996 transitions. [2024-11-19 05:55:41,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.9095890410958904 [2024-11-19 05:55:41,171 INFO L175 Difference]: Start difference. First operand has 349 places, 425 transitions, 1267 flow. Second operand 3 states and 996 transitions. [2024-11-19 05:55:41,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 427 transitions, 1325 flow [2024-11-19 05:55:41,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 427 transitions, 1325 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 05:55:41,184 INFO L231 Difference]: Finished difference. Result has 352 places, 425 transitions, 1278 flow [2024-11-19 05:55:41,184 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} [2024-11-19 05:55:41,187 INFO L277 CegarLoopForPetriNet]: 346 programPoint places, 6 predicate places. [2024-11-19 05:55:41,188 INFO L471 AbstractCegarLoop]: Abstraction has has 352 places, 425 transitions, 1278 flow [2024-11-19 05:55:41,188 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) [2024-11-19 05:55:41,189 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 05:55:41,189 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] [2024-11-19 05:55:41,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 05:55:41,189 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)] === [2024-11-19 05:55:41,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 05:55:41,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1603318101, now seen corresponding path program 1 times [2024-11-19 05:55:41,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 05:55:41,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471848625] [2024-11-19 05:55:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 05:55:41,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 05:55:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 05:55:41,237 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-19 05:55:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-19 05:55:41,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-19 05:55:41,299 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-19 05:55:41,300 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (37 of 38 remaining) [2024-11-19 05:55:41,302 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONDATA_RACE (36 of 38 remaining) [2024-11-19 05:55:41,302 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONDATA_RACE (35 of 38 remaining) [2024-11-19 05:55:41,302 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONDATA_RACE (34 of 38 remaining) [2024-11-19 05:55:41,305 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7ASSERT_VIOLATIONDATA_RACE (33 of 38 remaining) [2024-11-19 05:55:41,307 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONDATA_RACE (32 of 38 remaining) [2024-11-19 05:55:41,307 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5ASSERT_VIOLATIONDATA_RACE (31 of 38 remaining) [2024-11-19 05:55:41,307 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4ASSERT_VIOLATIONDATA_RACE (30 of 38 remaining) [2024-11-19 05:55:41,307 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6ASSERT_VIOLATIONDATA_RACE (29 of 38 remaining) [2024-11-19 05:55:41,308 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE (28 of 38 remaining) [2024-11-19 05:55:41,308 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONDATA_RACE (27 of 38 remaining) [2024-11-19 05:55:41,308 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONDATA_RACE (26 of 38 remaining) [2024-11-19 05:55:41,308 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONDATA_RACE (25 of 38 remaining) [2024-11-19 05:55:41,308 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONDATA_RACE (24 of 38 remaining) [2024-11-19 05:55:41,308 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONDATA_RACE (23 of 38 remaining) [2024-11-19 05:55:41,308 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONDATA_RACE (22 of 38 remaining) [2024-11-19 05:55:41,309 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONDATA_RACE (21 of 38 remaining) [2024-11-19 05:55:41,309 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 38 remaining) [2024-11-19 05:55:41,309 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONDATA_RACE (19 of 38 remaining) [2024-11-19 05:55:41,309 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1ASSERT_VIOLATIONDATA_RACE (18 of 38 remaining) [2024-11-19 05:55:41,309 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2ASSERT_VIOLATIONDATA_RACE (17 of 38 remaining) [2024-11-19 05:55:41,309 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3ASSERT_VIOLATIONDATA_RACE (16 of 38 remaining) [2024-11-19 05:55:41,309 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4ASSERT_VIOLATIONDATA_RACE (15 of 38 remaining) [2024-11-19 05:55:41,310 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5ASSERT_VIOLATIONDATA_RACE (14 of 38 remaining) [2024-11-19 05:55:41,310 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0ASSERT_VIOLATIONDATA_RACE (13 of 38 remaining) [2024-11-19 05:55:41,310 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1ASSERT_VIOLATIONDATA_RACE (12 of 38 remaining) [2024-11-19 05:55:41,310 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2ASSERT_VIOLATIONDATA_RACE (11 of 38 remaining) [2024-11-19 05:55:41,310 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7ASSERT_VIOLATIONDATA_RACE (10 of 38 remaining) [2024-11-19 05:55:41,310 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3ASSERT_VIOLATIONDATA_RACE (9 of 38 remaining) [2024-11-19 05:55:41,310 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5ASSERT_VIOLATIONDATA_RACE (8 of 38 remaining) [2024-11-19 05:55:41,311 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4ASSERT_VIOLATIONDATA_RACE (7 of 38 remaining) [2024-11-19 05:55:41,311 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6ASSERT_VIOLATIONDATA_RACE (6 of 38 remaining) [2024-11-19 05:55:41,311 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0ASSERT_VIOLATIONDATA_RACE (5 of 38 remaining) [2024-11-19 05:55:41,311 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1ASSERT_VIOLATIONDATA_RACE (4 of 38 remaining) [2024-11-19 05:55:41,311 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2ASSERT_VIOLATIONDATA_RACE (3 of 38 remaining) [2024-11-19 05:55:41,311 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3ASSERT_VIOLATIONDATA_RACE (2 of 38 remaining) [2024-11-19 05:55:41,311 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4ASSERT_VIOLATIONDATA_RACE (1 of 38 remaining) [2024-11-19 05:55:41,312 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5ASSERT_VIOLATIONDATA_RACE (0 of 38 remaining) [2024-11-19 05:55:41,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 05:55:41,314 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-11-19 05:55:41,322 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-19 05:55:41,322 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-19 05:55:41,461 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-11-19 05:55:41,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 553 places, 588 transitions, 1220 flow [2024-11-19 05:55:42,159 INFO L124 PetriNetUnfolderBase]: 197/1961 cut-off events. [2024-11-19 05:55:42,159 INFO L125 PetriNetUnfolderBase]: For 72/90 co-relation queries the response was YES. [2024-11-19 05:55:42,223 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. [2024-11-19 05:55:42,223 INFO L82 GeneralOperation]: Start removeDead. Operand has 553 places, 588 transitions, 1220 flow [2024-11-19 05:55:42,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 553 places, 588 transitions, 1220 flow [2024-11-19 05:55:42,259 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 05:55:42,260 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;@483b853a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 05:55:42,260 INFO L334 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2024-11-19 05:55:42,264 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 05:55:42,265 INFO L124 PetriNetUnfolderBase]: 0/34 cut-off events. [2024-11-19 05:55:42,265 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 05:55:42,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 05:55:42,265 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] [2024-11-19 05:55:42,265 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)] === [2024-11-19 05:55:42,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 05:55:42,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1346620874, now seen corresponding path program 1 times [2024-11-19 05:55:42,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 05:55:42,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445639108] [2024-11-19 05:55:42,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 05:55:42,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 05:55:42,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 05:55:42,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 05:55:42,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 05:55:42,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445639108] [2024-11-19 05:55:42,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445639108] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 05:55:42,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 05:55:42,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 05:55:42,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607847719] [2024-11-19 05:55:42,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 05:55:42,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 05:55:42,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 05:55:42,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 05:55:42,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 05:55:42,340 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 508 out of 588 [2024-11-19 05:55:42,343 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) [2024-11-19 05:55:42,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 05:55:42,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 508 of 588 [2024-11-19 05:55:42,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand