./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/no-overflow.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-simpl-str-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-simpl-str-trans.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f7b74cf7a2419cab3ab4545eb4bb4cb738b0dd565da7b17a0ca0e4253475f1b6 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 21:59:56,479 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 21:59:56,552 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2024-11-20 21:59:56,559 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 21:59:56,559 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 21:59:56,610 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 21:59:56,611 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 21:59:56,611 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 21:59:56,612 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 21:59:56,612 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 21:59:56,613 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 21:59:56,613 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 21:59:56,614 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 21:59:56,614 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 21:59:56,614 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 21:59:56,615 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 21:59:56,618 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 21:59:56,618 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 21:59:56,620 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 21:59:56,620 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 21:59:56,621 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 21:59:56,621 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 21:59:56,622 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 21:59:56,622 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 21:59:56,622 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 21:59:56,622 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-20 21:59:56,623 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 21:59:56,625 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 21:59:56,625 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 21:59:56,626 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 21:59:56,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 21:59:56,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 21:59:56,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 21:59:56,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 21:59:56,627 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 21:59:56,628 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 21:59:56,628 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 21:59:56,628 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 21:59:56,628 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 21:59:56,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 21:59:56,629 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 21:59:56,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 21:59:56,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 21:59:56,631 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 21:59:56,632 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7b74cf7a2419cab3ab4545eb4bb4cb738b0dd565da7b17a0ca0e4253475f1b6 [2024-11-20 21:59:56,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 21:59:56,942 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 21:59:56,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 21:59:56,946 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 21:59:56,947 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 21:59:56,949 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-simpl-str-trans.wvr.c [2024-11-20 21:59:58,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 21:59:58,656 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 21:59:58,656 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-simpl-str-trans.wvr.c [2024-11-20 21:59:58,665 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e3477a90/e2e7a66f61494cb9832ca10a693ed240/FLAG4e804ff2b [2024-11-20 21:59:59,030 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e3477a90/e2e7a66f61494cb9832ca10a693ed240 [2024-11-20 21:59:59,033 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 21:59:59,035 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 21:59:59,038 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 21:59:59,038 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 21:59:59,044 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 21:59:59,045 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,046 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3002d49d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59, skipping insertion in model container [2024-11-20 21:59:59,046 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,075 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 21:59:59,310 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 21:59:59,325 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 21:59:59,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 21:59:59,388 INFO L204 MainTranslator]: Completed translation [2024-11-20 21:59:59,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59 WrapperNode [2024-11-20 21:59:59,389 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 21:59:59,390 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 21:59:59,390 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 21:59:59,391 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 21:59:59,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,444 INFO L138 Inliner]: procedures = 22, calls = 16, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 197 [2024-11-20 21:59:59,448 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 21:59:59,449 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 21:59:59,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 21:59:59,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 21:59:59,461 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,462 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,465 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,493 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-11-20 21:59:59,497 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,497 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,503 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,514 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,518 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,521 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 21:59:59,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 21:59:59,526 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 21:59:59,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 21:59:59,527 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (1/1) ... [2024-11-20 21:59:59,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 21:59:59,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 21:59:59,561 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) [2024-11-20 21:59:59,565 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 [2024-11-20 21:59:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 21:59:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 21:59:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 21:59:59,611 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 21:59:59,611 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 21:59:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 21:59:59,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 21:59:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 21:59:59,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 21:59:59,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 21:59:59,613 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 21:59:59,706 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 21:59:59,708 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 22:00:00,100 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 22:00:00,100 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 22:00:00,335 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 22:00:00,338 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-20 22:00:00,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:00:00 BoogieIcfgContainer [2024-11-20 22:00:00,339 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 22:00:00,341 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 22:00:00,343 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 22:00:00,347 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 22:00:00,347 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:59:59" (1/3) ... [2024-11-20 22:00:00,348 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e49ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:00:00, skipping insertion in model container [2024-11-20 22:00:00,348 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:59:59" (2/3) ... [2024-11-20 22:00:00,349 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e49ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:00:00, skipping insertion in model container [2024-11-20 22:00:00,349 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:00:00" (3/3) ... [2024-11-20 22:00:00,350 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-simpl-str-trans.wvr.c [2024-11-20 22:00:00,370 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 22:00:00,371 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-20 22:00:00,371 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 22:00:00,471 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 22:00:00,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 89 transitions, 199 flow [2024-11-20 22:00:00,571 INFO L124 PetriNetUnfolderBase]: 12/86 cut-off events. [2024-11-20 22:00:00,574 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 22:00:00,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 12/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 313 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2024-11-20 22:00:00,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 89 transitions, 199 flow [2024-11-20 22:00:00,588 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 84 transitions, 183 flow [2024-11-20 22:00:00,606 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 22:00:00,616 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;@3b3df143, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 22:00:00,616 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-20 22:00:00,629 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 22:00:00,632 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2024-11-20 22:00:00,632 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-20 22:00:00,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:00,634 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:00,634 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:00,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:00,640 INFO L85 PathProgramCache]: Analyzing trace with hash -629453063, now seen corresponding path program 1 times [2024-11-20 22:00:00,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:00,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356591243] [2024-11-20 22:00:00,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:00,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:00,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:00,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356591243] [2024-11-20 22:00:00,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356591243] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:00,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:00,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:00,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069819866] [2024-11-20 22:00:00,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:00,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:00,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:01,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:01,042 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2024-11-20 22:00:01,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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) [2024-11-20 22:00:01,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:01,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2024-11-20 22:00:01,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:02,818 INFO L124 PetriNetUnfolderBase]: 8633/13840 cut-off events. [2024-11-20 22:00:02,819 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2024-11-20 22:00:02,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25678 conditions, 13840 events. 8633/13840 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 105712 event pairs, 2832 based on Foata normal form. 364/11549 useless extension candidates. Maximal degree in co-relation 24979. Up to 5668 conditions per place. [2024-11-20 22:00:02,987 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 86 selfloop transitions, 5 changer transitions 0/133 dead transitions. [2024-11-20 22:00:02,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 133 transitions, 475 flow [2024-11-20 22:00:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:02,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2024-11-20 22:00:03,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7696629213483146 [2024-11-20 22:00:03,004 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 183 flow. Second operand 4 states and 274 transitions. [2024-11-20 22:00:03,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 133 transitions, 475 flow [2024-11-20 22:00:03,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 133 transitions, 460 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 22:00:03,031 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 208 flow [2024-11-20 22:00:03,033 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-11-20 22:00:03,038 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 0 predicate places. [2024-11-20 22:00:03,038 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 208 flow [2024-11-20 22:00:03,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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) [2024-11-20 22:00:03,039 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:03,039 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:03,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 22:00:03,039 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:03,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1961792194, now seen corresponding path program 1 times [2024-11-20 22:00:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:03,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990827256] [2024-11-20 22:00:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:03,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:03,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:03,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990827256] [2024-11-20 22:00:03,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990827256] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:03,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:03,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 22:00:03,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965985215] [2024-11-20 22:00:03,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:03,170 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:03,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:03,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:03,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:03,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 89 [2024-11-20 22:00:03,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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) [2024-11-20 22:00:03,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:03,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 89 [2024-11-20 22:00:03,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:04,207 INFO L124 PetriNetUnfolderBase]: 6311/11503 cut-off events. [2024-11-20 22:00:04,207 INFO L125 PetriNetUnfolderBase]: For 2345/2363 co-relation queries the response was YES. [2024-11-20 22:00:04,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22474 conditions, 11503 events. 6311/11503 cut-off events. For 2345/2363 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 97537 event pairs, 1511 based on Foata normal form. 18/9931 useless extension candidates. Maximal degree in co-relation 11989. Up to 5147 conditions per place. [2024-11-20 22:00:04,296 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 58 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2024-11-20 22:00:04,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 108 transitions, 379 flow [2024-11-20 22:00:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:04,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:04,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 253 transitions. [2024-11-20 22:00:04,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7106741573033708 [2024-11-20 22:00:04,302 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 208 flow. Second operand 4 states and 253 transitions. [2024-11-20 22:00:04,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 108 transitions, 379 flow [2024-11-20 22:00:04,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 108 transitions, 379 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 22:00:04,350 INFO L231 Difference]: Finished difference. Result has 84 places, 85 transitions, 214 flow [2024-11-20 22:00:04,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=84, PETRI_TRANSITIONS=85} [2024-11-20 22:00:04,351 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 2 predicate places. [2024-11-20 22:00:04,351 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 85 transitions, 214 flow [2024-11-20 22:00:04,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 states have internal predecessors, (196), 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) [2024-11-20 22:00:04,352 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:04,352 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:04,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 22:00:04,352 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:04,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:04,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1652510514, now seen corresponding path program 1 times [2024-11-20 22:00:04,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:04,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783210746] [2024-11-20 22:00:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:04,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:04,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:04,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783210746] [2024-11-20 22:00:04,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783210746] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:04,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:04,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:04,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704651851] [2024-11-20 22:00:04,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:04,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:04,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:04,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:04,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:04,471 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2024-11-20 22:00:04,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 85 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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) [2024-11-20 22:00:04,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:04,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2024-11-20 22:00:04,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:06,230 INFO L124 PetriNetUnfolderBase]: 10606/17820 cut-off events. [2024-11-20 22:00:06,231 INFO L125 PetriNetUnfolderBase]: For 6332/6941 co-relation queries the response was YES. [2024-11-20 22:00:06,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36166 conditions, 17820 events. 10606/17820 cut-off events. For 6332/6941 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 147793 event pairs, 3534 based on Foata normal form. 763/15551 useless extension candidates. Maximal degree in co-relation 20800. Up to 6926 conditions per place. [2024-11-20 22:00:06,377 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 90 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-20 22:00:06,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 560 flow [2024-11-20 22:00:06,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:06,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:06,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 272 transitions. [2024-11-20 22:00:06,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7640449438202247 [2024-11-20 22:00:06,380 INFO L175 Difference]: Start difference. First operand has 84 places, 85 transitions, 214 flow. Second operand 4 states and 272 transitions. [2024-11-20 22:00:06,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 560 flow [2024-11-20 22:00:06,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 540 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 22:00:06,459 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 240 flow [2024-11-20 22:00:06,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-11-20 22:00:06,461 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 4 predicate places. [2024-11-20 22:00:06,462 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 240 flow [2024-11-20 22:00:06,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 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) [2024-11-20 22:00:06,462 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:06,462 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:06,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 22:00:06,463 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:06,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash 685984765, now seen corresponding path program 1 times [2024-11-20 22:00:06,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:06,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045339363] [2024-11-20 22:00:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:06,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:06,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:06,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045339363] [2024-11-20 22:00:06,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045339363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:06,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:06,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 22:00:06,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118156449] [2024-11-20 22:00:06,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:06,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:06,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:06,557 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 89 [2024-11-20 22:00:06,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-11-20 22:00:06,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:06,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 89 [2024-11-20 22:00:06,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:07,924 INFO L124 PetriNetUnfolderBase]: 7663/14327 cut-off events. [2024-11-20 22:00:07,925 INFO L125 PetriNetUnfolderBase]: For 6263/6708 co-relation queries the response was YES. [2024-11-20 22:00:07,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29869 conditions, 14327 events. 7663/14327 cut-off events. For 6263/6708 co-relation queries the response was YES. Maximal size of possible extension queue 881. Compared 128416 event pairs, 1873 based on Foata normal form. 455/13012 useless extension candidates. Maximal degree in co-relation 17251. Up to 6429 conditions per place. [2024-11-20 22:00:08,157 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 63 selfloop transitions, 4 changer transitions 0/111 dead transitions. [2024-11-20 22:00:08,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 111 transitions, 441 flow [2024-11-20 22:00:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:08,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 249 transitions. [2024-11-20 22:00:08,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.699438202247191 [2024-11-20 22:00:08,159 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 240 flow. Second operand 4 states and 249 transitions. [2024-11-20 22:00:08,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 111 transitions, 441 flow [2024-11-20 22:00:08,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 111 transitions, 441 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 22:00:08,210 INFO L231 Difference]: Finished difference. Result has 88 places, 86 transitions, 244 flow [2024-11-20 22:00:08,210 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=244, PETRI_PLACES=88, PETRI_TRANSITIONS=86} [2024-11-20 22:00:08,211 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 6 predicate places. [2024-11-20 22:00:08,212 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 86 transitions, 244 flow [2024-11-20 22:00:08,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 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) [2024-11-20 22:00:08,213 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:08,213 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:08,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 22:00:08,214 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:08,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:08,216 INFO L85 PathProgramCache]: Analyzing trace with hash -311780926, now seen corresponding path program 1 times [2024-11-20 22:00:08,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:08,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784901424] [2024-11-20 22:00:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:08,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:08,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784901424] [2024-11-20 22:00:08,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784901424] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:08,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:08,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 22:00:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593185308] [2024-11-20 22:00:08,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:08,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:08,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:08,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:08,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 89 [2024-11-20 22:00:08,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 86 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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) [2024-11-20 22:00:08,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:08,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 89 [2024-11-20 22:00:08,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:09,315 INFO L124 PetriNetUnfolderBase]: 7682/14536 cut-off events. [2024-11-20 22:00:09,316 INFO L125 PetriNetUnfolderBase]: For 7388/7622 co-relation queries the response was YES. [2024-11-20 22:00:09,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30765 conditions, 14536 events. 7682/14536 cut-off events. For 7388/7622 co-relation queries the response was YES. Maximal size of possible extension queue 922. Compared 131896 event pairs, 1801 based on Foata normal form. 234/13015 useless extension candidates. Maximal degree in co-relation 17937. Up to 6391 conditions per place. [2024-11-20 22:00:09,414 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 61 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2024-11-20 22:00:09,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 109 transitions, 447 flow [2024-11-20 22:00:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 252 transitions. [2024-11-20 22:00:09,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7078651685393258 [2024-11-20 22:00:09,417 INFO L175 Difference]: Start difference. First operand has 88 places, 86 transitions, 244 flow. Second operand 4 states and 252 transitions. [2024-11-20 22:00:09,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 109 transitions, 447 flow [2024-11-20 22:00:09,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 109 transitions, 433 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 22:00:09,500 INFO L231 Difference]: Finished difference. Result has 87 places, 85 transitions, 242 flow [2024-11-20 22:00:09,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=242, PETRI_PLACES=87, PETRI_TRANSITIONS=85} [2024-11-20 22:00:09,501 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 5 predicate places. [2024-11-20 22:00:09,501 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 85 transitions, 242 flow [2024-11-20 22:00:09,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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) [2024-11-20 22:00:09,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:09,502 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:09,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 22:00:09,502 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:09,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash -209308091, now seen corresponding path program 1 times [2024-11-20 22:00:09,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:09,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256635658] [2024-11-20 22:00:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:09,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:09,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:09,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256635658] [2024-11-20 22:00:09,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256635658] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:09,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:09,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:09,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724647598] [2024-11-20 22:00:09,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:09,557 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:09,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:09,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:09,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:09,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2024-11-20 22:00:09,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 85 transitions, 242 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 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) [2024-11-20 22:00:09,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:09,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2024-11-20 22:00:09,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:10,787 INFO L124 PetriNetUnfolderBase]: 8589/15779 cut-off events. [2024-11-20 22:00:10,788 INFO L125 PetriNetUnfolderBase]: For 8381/8874 co-relation queries the response was YES. [2024-11-20 22:00:10,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33466 conditions, 15779 events. 8589/15779 cut-off events. For 8381/8874 co-relation queries the response was YES. Maximal size of possible extension queue 959. Compared 141525 event pairs, 3715 based on Foata normal form. 472/14104 useless extension candidates. Maximal degree in co-relation 18847. Up to 7012 conditions per place. [2024-11-20 22:00:10,870 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 90 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2024-11-20 22:00:10,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 135 transitions, 580 flow [2024-11-20 22:00:10,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2024-11-20 22:00:10,874 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7556179775280899 [2024-11-20 22:00:10,874 INFO L175 Difference]: Start difference. First operand has 87 places, 85 transitions, 242 flow. Second operand 4 states and 269 transitions. [2024-11-20 22:00:10,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 135 transitions, 580 flow [2024-11-20 22:00:10,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 135 transitions, 557 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 22:00:10,922 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 233 flow [2024-11-20 22:00:10,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2024-11-20 22:00:10,925 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 4 predicate places. [2024-11-20 22:00:10,925 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 233 flow [2024-11-20 22:00:10,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 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) [2024-11-20 22:00:10,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:10,926 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:10,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 22:00:10,926 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:10,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:10,927 INFO L85 PathProgramCache]: Analyzing trace with hash -209309116, now seen corresponding path program 1 times [2024-11-20 22:00:10,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:10,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733496980] [2024-11-20 22:00:10,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:10,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:10,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:10,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733496980] [2024-11-20 22:00:10,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733496980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:10,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:10,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:10,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901307587] [2024-11-20 22:00:10,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:10,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 22:00:10,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:10,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 22:00:10,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 22:00:11,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 89 [2024-11-20 22:00:11,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 233 flow. Second operand has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 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) [2024-11-20 22:00:11,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:11,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 89 [2024-11-20 22:00:11,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:12,070 INFO L124 PetriNetUnfolderBase]: 10510/16965 cut-off events. [2024-11-20 22:00:12,070 INFO L125 PetriNetUnfolderBase]: For 5720/6344 co-relation queries the response was YES. [2024-11-20 22:00:12,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37465 conditions, 16965 events. 10510/16965 cut-off events. For 5720/6344 co-relation queries the response was YES. Maximal size of possible extension queue 989. Compared 134175 event pairs, 1805 based on Foata normal form. 314/15775 useless extension candidates. Maximal degree in co-relation 21635. Up to 7845 conditions per place. [2024-11-20 22:00:12,379 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 88 selfloop transitions, 6 changer transitions 0/133 dead transitions. [2024-11-20 22:00:12,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 133 transitions, 561 flow [2024-11-20 22:00:12,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 22:00:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 22:00:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 318 transitions. [2024-11-20 22:00:12,381 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7146067415730337 [2024-11-20 22:00:12,381 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 233 flow. Second operand 5 states and 318 transitions. [2024-11-20 22:00:12,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 133 transitions, 561 flow [2024-11-20 22:00:12,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 22:00:12,419 INFO L231 Difference]: Finished difference. Result has 87 places, 83 transitions, 237 flow [2024-11-20 22:00:12,419 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=87, PETRI_TRANSITIONS=83} [2024-11-20 22:00:12,420 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 5 predicate places. [2024-11-20 22:00:12,420 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 83 transitions, 237 flow [2024-11-20 22:00:12,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.4) internal successors, (237), 5 states have internal predecessors, (237), 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) [2024-11-20 22:00:12,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:12,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:12,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 22:00:12,421 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:12,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:12,422 INFO L85 PathProgramCache]: Analyzing trace with hash 297975129, now seen corresponding path program 1 times [2024-11-20 22:00:12,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:12,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865140764] [2024-11-20 22:00:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:12,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:12,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:12,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865140764] [2024-11-20 22:00:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865140764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:12,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:12,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:12,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199757886] [2024-11-20 22:00:12,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:12,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:12,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:12,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:12,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:12,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2024-11-20 22:00:12,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 83 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 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) [2024-11-20 22:00:12,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:12,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2024-11-20 22:00:12,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:13,960 INFO L124 PetriNetUnfolderBase]: 12659/21669 cut-off events. [2024-11-20 22:00:13,960 INFO L125 PetriNetUnfolderBase]: For 12861/13943 co-relation queries the response was YES. [2024-11-20 22:00:14,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46647 conditions, 21669 events. 12659/21669 cut-off events. For 12861/13943 co-relation queries the response was YES. Maximal size of possible extension queue 1239. Compared 189168 event pairs, 4628 based on Foata normal form. 1237/19913 useless extension candidates. Maximal degree in co-relation 26777. Up to 8789 conditions per place. [2024-11-20 22:00:14,099 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 94 selfloop transitions, 5 changer transitions 0/136 dead transitions. [2024-11-20 22:00:14,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 629 flow [2024-11-20 22:00:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:14,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 270 transitions. [2024-11-20 22:00:14,101 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7584269662921348 [2024-11-20 22:00:14,101 INFO L175 Difference]: Start difference. First operand has 87 places, 83 transitions, 237 flow. Second operand 4 states and 270 transitions. [2024-11-20 22:00:14,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 629 flow [2024-11-20 22:00:14,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 608 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 22:00:14,169 INFO L231 Difference]: Finished difference. Result has 89 places, 85 transitions, 262 flow [2024-11-20 22:00:14,169 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=89, PETRI_TRANSITIONS=85} [2024-11-20 22:00:14,170 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 7 predicate places. [2024-11-20 22:00:14,170 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 85 transitions, 262 flow [2024-11-20 22:00:14,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 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) [2024-11-20 22:00:14,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:14,171 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:14,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 22:00:14,171 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:14,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1075305194, now seen corresponding path program 1 times [2024-11-20 22:00:14,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:14,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382920099] [2024-11-20 22:00:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:14,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:14,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:14,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:14,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382920099] [2024-11-20 22:00:14,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382920099] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:14,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:14,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 22:00:14,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468712869] [2024-11-20 22:00:14,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:14,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:14,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:14,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:14,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:14,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 89 [2024-11-20 22:00:14,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 85 transitions, 262 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2024-11-20 22:00:14,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:14,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 89 [2024-11-20 22:00:14,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:15,427 INFO L124 PetriNetUnfolderBase]: 9275/17800 cut-off events. [2024-11-20 22:00:15,427 INFO L125 PetriNetUnfolderBase]: For 11232/11863 co-relation queries the response was YES. [2024-11-20 22:00:15,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38839 conditions, 17800 events. 9275/17800 cut-off events. For 11232/11863 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 168142 event pairs, 2224 based on Foata normal form. 734/16730 useless extension candidates. Maximal degree in co-relation 23961. Up to 7859 conditions per place. [2024-11-20 22:00:15,534 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 66 selfloop transitions, 4 changer transitions 0/110 dead transitions. [2024-11-20 22:00:15,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 110 transitions, 489 flow [2024-11-20 22:00:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:15,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 248 transitions. [2024-11-20 22:00:15,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6966292134831461 [2024-11-20 22:00:15,538 INFO L175 Difference]: Start difference. First operand has 89 places, 85 transitions, 262 flow. Second operand 4 states and 248 transitions. [2024-11-20 22:00:15,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 110 transitions, 489 flow [2024-11-20 22:00:15,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 110 transitions, 489 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 22:00:15,626 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 266 flow [2024-11-20 22:00:15,626 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=266, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2024-11-20 22:00:15,626 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 9 predicate places. [2024-11-20 22:00:15,627 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 266 flow [2024-11-20 22:00:15,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 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) [2024-11-20 22:00:15,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:15,627 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:15,627 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 22:00:15,627 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:15,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:15,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2101352672, now seen corresponding path program 1 times [2024-11-20 22:00:15,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:15,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74018453] [2024-11-20 22:00:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:15,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:15,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:15,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74018453] [2024-11-20 22:00:15,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74018453] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:15,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:15,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 22:00:15,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712561968] [2024-11-20 22:00:15,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:15,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 22:00:15,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:15,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 22:00:15,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-20 22:00:15,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 89 [2024-11-20 22:00:15,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 44.166666666666664) internal successors, (265), 6 states have internal predecessors, (265), 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) [2024-11-20 22:00:15,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:15,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 89 [2024-11-20 22:00:15,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:17,539 INFO L124 PetriNetUnfolderBase]: 12676/20604 cut-off events. [2024-11-20 22:00:17,539 INFO L125 PetriNetUnfolderBase]: For 15746/16711 co-relation queries the response was YES. [2024-11-20 22:00:17,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49418 conditions, 20604 events. 12676/20604 cut-off events. For 15746/16711 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 168898 event pairs, 2296 based on Foata normal form. 1221/20431 useless extension candidates. Maximal degree in co-relation 30295. Up to 5311 conditions per place. [2024-11-20 22:00:17,657 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 118 selfloop transitions, 9 changer transitions 0/165 dead transitions. [2024-11-20 22:00:17,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 165 transitions, 817 flow [2024-11-20 22:00:17,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 22:00:17,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 22:00:17,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 368 transitions. [2024-11-20 22:00:17,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6891385767790262 [2024-11-20 22:00:17,659 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 266 flow. Second operand 6 states and 368 transitions. [2024-11-20 22:00:17,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 165 transitions, 817 flow [2024-11-20 22:00:17,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 165 transitions, 791 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 22:00:17,716 INFO L231 Difference]: Finished difference. Result has 93 places, 84 transitions, 283 flow [2024-11-20 22:00:17,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=283, PETRI_PLACES=93, PETRI_TRANSITIONS=84} [2024-11-20 22:00:17,717 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 11 predicate places. [2024-11-20 22:00:17,717 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 84 transitions, 283 flow [2024-11-20 22:00:17,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.166666666666664) internal successors, (265), 6 states have internal predecessors, (265), 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) [2024-11-20 22:00:17,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:17,718 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:17,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-20 22:00:17,718 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:17,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash 647295124, now seen corresponding path program 1 times [2024-11-20 22:00:17,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:17,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980211711] [2024-11-20 22:00:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:17,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:17,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:17,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980211711] [2024-11-20 22:00:17,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980211711] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:17,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:17,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 22:00:17,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422420840] [2024-11-20 22:00:17,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:17,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:17,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:17,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:17,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:17,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 89 [2024-11-20 22:00:17,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 84 transitions, 283 flow. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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) [2024-11-20 22:00:17,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:17,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 89 [2024-11-20 22:00:17,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:18,959 INFO L124 PetriNetUnfolderBase]: 9329/17938 cut-off events. [2024-11-20 22:00:18,960 INFO L125 PetriNetUnfolderBase]: For 17304/18410 co-relation queries the response was YES. [2024-11-20 22:00:18,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41641 conditions, 17938 events. 9329/17938 cut-off events. For 17304/18410 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 170328 event pairs, 2522 based on Foata normal form. 959/17172 useless extension candidates. Maximal degree in co-relation 24671. Up to 7058 conditions per place. [2024-11-20 22:00:19,047 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 66 selfloop transitions, 4 changer transitions 0/109 dead transitions. [2024-11-20 22:00:19,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 109 transitions, 528 flow [2024-11-20 22:00:19,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:19,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 251 transitions. [2024-11-20 22:00:19,048 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7050561797752809 [2024-11-20 22:00:19,049 INFO L175 Difference]: Start difference. First operand has 93 places, 84 transitions, 283 flow. Second operand 4 states and 251 transitions. [2024-11-20 22:00:19,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 109 transitions, 528 flow [2024-11-20 22:00:19,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 109 transitions, 506 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 22:00:19,127 INFO L231 Difference]: Finished difference. Result has 91 places, 83 transitions, 276 flow [2024-11-20 22:00:19,127 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=276, PETRI_PLACES=91, PETRI_TRANSITIONS=83} [2024-11-20 22:00:19,128 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 9 predicate places. [2024-11-20 22:00:19,128 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 83 transitions, 276 flow [2024-11-20 22:00:19,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 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) [2024-11-20 22:00:19,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:19,129 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:19,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 22:00:19,129 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:19,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1025278053, now seen corresponding path program 1 times [2024-11-20 22:00:19,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:19,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132644466] [2024-11-20 22:00:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:19,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:19,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:19,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132644466] [2024-11-20 22:00:19,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132644466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:19,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:19,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:19,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579583587] [2024-11-20 22:00:19,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:19,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:19,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:19,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:19,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:19,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2024-11-20 22:00:19,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 83 transitions, 276 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2024-11-20 22:00:19,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:19,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2024-11-20 22:00:19,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:20,662 INFO L124 PetriNetUnfolderBase]: 10491/19538 cut-off events. [2024-11-20 22:00:20,662 INFO L125 PetriNetUnfolderBase]: For 17090/18481 co-relation queries the response was YES. [2024-11-20 22:00:20,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45405 conditions, 19538 events. 10491/19538 cut-off events. For 17090/18481 co-relation queries the response was YES. Maximal size of possible extension queue 1092. Compared 181634 event pairs, 4640 based on Foata normal form. 1322/18808 useless extension candidates. Maximal degree in co-relation 27526. Up to 8518 conditions per place. [2024-11-20 22:00:21,028 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 97 selfloop transitions, 4 changer transitions 0/137 dead transitions. [2024-11-20 22:00:21,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 688 flow [2024-11-20 22:00:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:21,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 267 transitions. [2024-11-20 22:00:21,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-20 22:00:21,029 INFO L175 Difference]: Start difference. First operand has 91 places, 83 transitions, 276 flow. Second operand 4 states and 267 transitions. [2024-11-20 22:00:21,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 688 flow [2024-11-20 22:00:21,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 137 transitions, 665 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 22:00:21,107 INFO L231 Difference]: Finished difference. Result has 90 places, 82 transitions, 267 flow [2024-11-20 22:00:21,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=267, PETRI_PLACES=90, PETRI_TRANSITIONS=82} [2024-11-20 22:00:21,108 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 8 predicate places. [2024-11-20 22:00:21,108 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 82 transitions, 267 flow [2024-11-20 22:00:21,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 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) [2024-11-20 22:00:21,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:21,109 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:21,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 22:00:21,109 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:21,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1025277028, now seen corresponding path program 1 times [2024-11-20 22:00:21,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:21,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637016712] [2024-11-20 22:00:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:21,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:21,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:21,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637016712] [2024-11-20 22:00:21,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637016712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:21,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:21,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:21,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455357555] [2024-11-20 22:00:21,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:21,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 22:00:21,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:21,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 22:00:21,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 22:00:21,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 89 [2024-11-20 22:00:21,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 82 transitions, 267 flow. Second operand has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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) [2024-11-20 22:00:21,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:21,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 89 [2024-11-20 22:00:21,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:22,698 INFO L124 PetriNetUnfolderBase]: 12797/20792 cut-off events. [2024-11-20 22:00:22,699 INFO L125 PetriNetUnfolderBase]: For 15609/17548 co-relation queries the response was YES. [2024-11-20 22:00:22,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50905 conditions, 20792 events. 12797/20792 cut-off events. For 15609/17548 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 169158 event pairs, 2189 based on Foata normal form. 1372/20954 useless extension candidates. Maximal degree in co-relation 31234. Up to 9635 conditions per place. [2024-11-20 22:00:23,055 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 95 selfloop transitions, 6 changer transitions 0/135 dead transitions. [2024-11-20 22:00:23,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 135 transitions, 669 flow [2024-11-20 22:00:23,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 22:00:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 22:00:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 316 transitions. [2024-11-20 22:00:23,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7101123595505618 [2024-11-20 22:00:23,056 INFO L175 Difference]: Start difference. First operand has 90 places, 82 transitions, 267 flow. Second operand 5 states and 316 transitions. [2024-11-20 22:00:23,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 135 transitions, 669 flow [2024-11-20 22:00:23,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 663 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 22:00:23,127 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 271 flow [2024-11-20 22:00:23,127 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2024-11-20 22:00:23,127 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 9 predicate places. [2024-11-20 22:00:23,128 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 271 flow [2024-11-20 22:00:23,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.8) internal successors, (239), 5 states have internal predecessors, (239), 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) [2024-11-20 22:00:23,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:23,128 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:23,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 22:00:23,128 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:23,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1664741162, now seen corresponding path program 1 times [2024-11-20 22:00:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235948852] [2024-11-20 22:00:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:23,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:23,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:23,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235948852] [2024-11-20 22:00:23,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235948852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:23,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:23,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 22:00:23,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894296675] [2024-11-20 22:00:23,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:23,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 22:00:23,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:23,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 22:00:23,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 22:00:23,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 89 [2024-11-20 22:00:23,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 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) [2024-11-20 22:00:23,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:23,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 89 [2024-11-20 22:00:23,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:25,024 INFO L124 PetriNetUnfolderBase]: 12652/20642 cut-off events. [2024-11-20 22:00:25,024 INFO L125 PetriNetUnfolderBase]: For 17164/18020 co-relation queries the response was YES. [2024-11-20 22:00:25,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50828 conditions, 20642 events. 12652/20642 cut-off events. For 17164/18020 co-relation queries the response was YES. Maximal size of possible extension queue 1129. Compared 168882 event pairs, 4671 based on Foata normal form. 910/20216 useless extension candidates. Maximal degree in co-relation 30927. Up to 8859 conditions per place. [2024-11-20 22:00:25,193 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 149 selfloop transitions, 8 changer transitions 0/190 dead transitions. [2024-11-20 22:00:25,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 190 transitions, 983 flow [2024-11-20 22:00:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 22:00:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 22:00:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 396 transitions. [2024-11-20 22:00:25,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7415730337078652 [2024-11-20 22:00:25,196 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 271 flow. Second operand 6 states and 396 transitions. [2024-11-20 22:00:25,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 190 transitions, 983 flow [2024-11-20 22:00:25,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 190 transitions, 945 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 22:00:25,359 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 286 flow [2024-11-20 22:00:25,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2024-11-20 22:00:25,360 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 11 predicate places. [2024-11-20 22:00:25,361 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 286 flow [2024-11-20 22:00:25,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 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) [2024-11-20 22:00:25,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:25,361 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:25,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 22:00:25,362 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:25,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:25,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1408718691, now seen corresponding path program 1 times [2024-11-20 22:00:25,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:25,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097275489] [2024-11-20 22:00:25,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:25,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:25,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:25,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097275489] [2024-11-20 22:00:25,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097275489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:25,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:25,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 22:00:25,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048724227] [2024-11-20 22:00:25,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:25,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:25,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:25,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:25,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 89 [2024-11-20 22:00:25,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 286 flow. Second operand has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 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) [2024-11-20 22:00:25,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:25,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 89 [2024-11-20 22:00:25,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:26,439 INFO L124 PetriNetUnfolderBase]: 9321/17281 cut-off events. [2024-11-20 22:00:26,439 INFO L125 PetriNetUnfolderBase]: For 20529/21488 co-relation queries the response was YES. [2024-11-20 22:00:26,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40962 conditions, 17281 events. 9321/17281 cut-off events. For 20529/21488 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 157631 event pairs, 2522 based on Foata normal form. 1213/16891 useless extension candidates. Maximal degree in co-relation 28146. Up to 7312 conditions per place. [2024-11-20 22:00:26,600 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 69 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2024-11-20 22:00:26,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 543 flow [2024-11-20 22:00:26,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:26,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 247 transitions. [2024-11-20 22:00:26,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6938202247191011 [2024-11-20 22:00:26,601 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 286 flow. Second operand 4 states and 247 transitions. [2024-11-20 22:00:26,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 543 flow [2024-11-20 22:00:26,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 108 transitions, 515 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-20 22:00:26,694 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 274 flow [2024-11-20 22:00:26,695 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2024-11-20 22:00:26,695 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 9 predicate places. [2024-11-20 22:00:26,695 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 274 flow [2024-11-20 22:00:26,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.25) internal successors, (197), 4 states have internal predecessors, (197), 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) [2024-11-20 22:00:26,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:26,696 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:26,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 22:00:26,696 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:26,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1718817497, now seen corresponding path program 1 times [2024-11-20 22:00:26,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:26,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584368855] [2024-11-20 22:00:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:26,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:26,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:26,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:26,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584368855] [2024-11-20 22:00:26,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584368855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:26,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:26,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 22:00:26,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446467802] [2024-11-20 22:00:26,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:26,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 22:00:26,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:26,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 22:00:26,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-20 22:00:26,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 89 [2024-11-20 22:00:26,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 274 flow. Second operand has 6 states, 6 states have (on average 44.5) internal successors, (267), 6 states have internal predecessors, (267), 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) [2024-11-20 22:00:26,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:26,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 89 [2024-11-20 22:00:26,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:28,293 INFO L124 PetriNetUnfolderBase]: 12797/20226 cut-off events. [2024-11-20 22:00:28,294 INFO L125 PetriNetUnfolderBase]: For 22075/23456 co-relation queries the response was YES. [2024-11-20 22:00:28,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50772 conditions, 20226 events. 12797/20226 cut-off events. For 22075/23456 co-relation queries the response was YES. Maximal size of possible extension queue 1138. Compared 158846 event pairs, 2180 based on Foata normal form. 1931/20947 useless extension candidates. Maximal degree in co-relation 34723. Up to 5475 conditions per place. [2024-11-20 22:00:28,453 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 123 selfloop transitions, 9 changer transitions 0/165 dead transitions. [2024-11-20 22:00:28,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 165 transitions, 874 flow [2024-11-20 22:00:28,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 22:00:28,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 22:00:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 365 transitions. [2024-11-20 22:00:28,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6835205992509363 [2024-11-20 22:00:28,455 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 274 flow. Second operand 6 states and 365 transitions. [2024-11-20 22:00:28,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 165 transitions, 874 flow [2024-11-20 22:00:28,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 165 transitions, 848 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 22:00:28,530 INFO L231 Difference]: Finished difference. Result has 93 places, 81 transitions, 291 flow [2024-11-20 22:00:28,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=93, PETRI_TRANSITIONS=81} [2024-11-20 22:00:28,530 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 11 predicate places. [2024-11-20 22:00:28,530 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 81 transitions, 291 flow [2024-11-20 22:00:28,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.5) internal successors, (267), 6 states have internal predecessors, (267), 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) [2024-11-20 22:00:28,531 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:28,531 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:28,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-20 22:00:28,531 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:28,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:28,531 INFO L85 PathProgramCache]: Analyzing trace with hash -720606762, now seen corresponding path program 1 times [2024-11-20 22:00:28,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:28,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063677200] [2024-11-20 22:00:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:28,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:28,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:28,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:28,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063677200] [2024-11-20 22:00:28,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063677200] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:28,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:28,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:28,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716607223] [2024-11-20 22:00:28,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:28,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 22:00:28,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:28,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 22:00:28,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 22:00:28,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 89 [2024-11-20 22:00:28,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 81 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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) [2024-11-20 22:00:28,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:28,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 89 [2024-11-20 22:00:28,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:30,132 INFO L124 PetriNetUnfolderBase]: 12930/20270 cut-off events. [2024-11-20 22:00:30,133 INFO L125 PetriNetUnfolderBase]: For 29666/31972 co-relation queries the response was YES. [2024-11-20 22:00:30,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53335 conditions, 20270 events. 12930/20270 cut-off events. For 29666/31972 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 156721 event pairs, 2539 based on Foata normal form. 2053/21350 useless extension candidates. Maximal degree in co-relation 36672. Up to 9002 conditions per place. [2024-11-20 22:00:30,297 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 99 selfloop transitions, 6 changer transitions 0/136 dead transitions. [2024-11-20 22:00:30,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 136 transitions, 743 flow [2024-11-20 22:00:30,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 22:00:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 22:00:30,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 314 transitions. [2024-11-20 22:00:30,299 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7056179775280899 [2024-11-20 22:00:30,299 INFO L175 Difference]: Start difference. First operand has 93 places, 81 transitions, 291 flow. Second operand 5 states and 314 transitions. [2024-11-20 22:00:30,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 136 transitions, 743 flow [2024-11-20 22:00:30,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 136 transitions, 712 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 22:00:30,420 INFO L231 Difference]: Finished difference. Result has 92 places, 80 transitions, 288 flow [2024-11-20 22:00:30,421 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=92, PETRI_TRANSITIONS=80} [2024-11-20 22:00:30,421 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 10 predicate places. [2024-11-20 22:00:30,421 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 80 transitions, 288 flow [2024-11-20 22:00:30,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.2) internal successors, (241), 5 states have internal predecessors, (241), 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) [2024-11-20 22:00:30,422 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:30,422 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:30,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 22:00:30,422 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:30,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:30,423 INFO L85 PathProgramCache]: Analyzing trace with hash -720605737, now seen corresponding path program 1 times [2024-11-20 22:00:30,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:30,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115363902] [2024-11-20 22:00:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:30,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:30,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:30,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:30,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115363902] [2024-11-20 22:00:30,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115363902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:30,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:30,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:30,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508510448] [2024-11-20 22:00:30,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:30,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:30,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:30,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:30,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:30,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2024-11-20 22:00:30,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 80 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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) [2024-11-20 22:00:30,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:30,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2024-11-20 22:00:30,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:31,606 INFO L124 PetriNetUnfolderBase]: 10522/18008 cut-off events. [2024-11-20 22:00:31,606 INFO L125 PetriNetUnfolderBase]: For 22769/24514 co-relation queries the response was YES. [2024-11-20 22:00:31,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45473 conditions, 18008 events. 10522/18008 cut-off events. For 22769/24514 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 153033 event pairs, 4871 based on Foata normal form. 1861/18896 useless extension candidates. Maximal degree in co-relation 31247. Up to 8895 conditions per place. [2024-11-20 22:00:31,745 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 101 selfloop transitions, 4 changer transitions 0/136 dead transitions. [2024-11-20 22:00:31,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 136 transitions, 720 flow [2024-11-20 22:00:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:31,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:31,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2024-11-20 22:00:31,747 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7443820224719101 [2024-11-20 22:00:31,747 INFO L175 Difference]: Start difference. First operand has 92 places, 80 transitions, 288 flow. Second operand 4 states and 265 transitions. [2024-11-20 22:00:31,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 136 transitions, 720 flow [2024-11-20 22:00:31,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 136 transitions, 708 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 22:00:31,821 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 278 flow [2024-11-20 22:00:31,822 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=278, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2024-11-20 22:00:31,822 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 9 predicate places. [2024-11-20 22:00:31,822 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 278 flow [2024-11-20 22:00:31,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 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) [2024-11-20 22:00:31,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:31,822 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:31,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 22:00:31,823 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:31,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:31,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1603914646, now seen corresponding path program 1 times [2024-11-20 22:00:31,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:31,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95828072] [2024-11-20 22:00:31,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:31,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:31,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:31,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95828072] [2024-11-20 22:00:31,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95828072] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:31,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:31,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 22:00:31,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484565256] [2024-11-20 22:00:31,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:31,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 22:00:31,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:31,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 22:00:31,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 22:00:31,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 89 [2024-11-20 22:00:31,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 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) [2024-11-20 22:00:31,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:31,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 89 [2024-11-20 22:00:31,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:33,478 INFO L124 PetriNetUnfolderBase]: 12701/20098 cut-off events. [2024-11-20 22:00:33,478 INFO L125 PetriNetUnfolderBase]: For 24570/26071 co-relation queries the response was YES. [2024-11-20 22:00:33,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51490 conditions, 20098 events. 12701/20098 cut-off events. For 24570/26071 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 158119 event pairs, 4595 based on Foata normal form. 1776/20867 useless extension candidates. Maximal degree in co-relation 35113. Up to 8717 conditions per place. [2024-11-20 22:00:33,666 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 99 selfloop transitions, 5 changer transitions 0/135 dead transitions. [2024-11-20 22:00:33,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 135 transitions, 707 flow [2024-11-20 22:00:33,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 22:00:33,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 22:00:33,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2024-11-20 22:00:33,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7443820224719101 [2024-11-20 22:00:33,668 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 278 flow. Second operand 4 states and 265 transitions. [2024-11-20 22:00:33,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 135 transitions, 707 flow [2024-11-20 22:00:33,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 135 transitions, 688 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 22:00:33,712 INFO L231 Difference]: Finished difference. Result has 91 places, 79 transitions, 282 flow [2024-11-20 22:00:33,712 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=91, PETRI_TRANSITIONS=79} [2024-11-20 22:00:33,712 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 9 predicate places. [2024-11-20 22:00:33,712 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 79 transitions, 282 flow [2024-11-20 22:00:33,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 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) [2024-11-20 22:00:33,713 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:33,713 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:33,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 22:00:33,714 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:33,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash -863972416, now seen corresponding path program 1 times [2024-11-20 22:00:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:33,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476407055] [2024-11-20 22:00:33,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:33,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:33,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:33,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:33,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476407055] [2024-11-20 22:00:33,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476407055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:33,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:33,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 22:00:33,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631294313] [2024-11-20 22:00:33,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:33,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 22:00:33,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:33,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 22:00:33,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-20 22:00:33,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 89 [2024-11-20 22:00:33,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 79 transitions, 282 flow. Second operand has 6 states, 6 states have (on average 44.833333333333336) internal successors, (269), 6 states have internal predecessors, (269), 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) [2024-11-20 22:00:33,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:33,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 89 [2024-11-20 22:00:33,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 22:00:35,307 INFO L124 PetriNetUnfolderBase]: 13746/21383 cut-off events. [2024-11-20 22:00:35,307 INFO L125 PetriNetUnfolderBase]: For 30736/32891 co-relation queries the response was YES. [2024-11-20 22:00:35,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56967 conditions, 21383 events. 13746/21383 cut-off events. For 30736/32891 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 165224 event pairs, 2778 based on Foata normal form. 2709/23037 useless extension candidates. Maximal degree in co-relation 44476. Up to 5557 conditions per place. [2024-11-20 22:00:35,463 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 128 selfloop transitions, 9 changer transitions 0/166 dead transitions. [2024-11-20 22:00:35,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 166 transitions, 934 flow [2024-11-20 22:00:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 22:00:35,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 22:00:35,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 362 transitions. [2024-11-20 22:00:35,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6779026217228464 [2024-11-20 22:00:35,464 INFO L175 Difference]: Start difference. First operand has 91 places, 79 transitions, 282 flow. Second operand 6 states and 362 transitions. [2024-11-20 22:00:35,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 166 transitions, 934 flow [2024-11-20 22:00:35,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 166 transitions, 918 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 22:00:35,559 INFO L231 Difference]: Finished difference. Result has 95 places, 79 transitions, 303 flow [2024-11-20 22:00:35,560 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=95, PETRI_TRANSITIONS=79} [2024-11-20 22:00:35,560 INFO L277 CegarLoopForPetriNet]: 82 programPoint places, 13 predicate places. [2024-11-20 22:00:35,560 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 79 transitions, 303 flow [2024-11-20 22:00:35,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.833333333333336) internal successors, (269), 6 states have internal predecessors, (269), 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) [2024-11-20 22:00:35,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 22:00:35,560 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 22:00:35,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 22:00:35,561 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 36 more)] === [2024-11-20 22:00:35,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 22:00:35,561 INFO L85 PathProgramCache]: Analyzing trace with hash -66023300, now seen corresponding path program 1 times [2024-11-20 22:00:35,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 22:00:35,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195064420] [2024-11-20 22:00:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 22:00:35,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 22:00:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 22:00:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 22:00:35,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 22:00:35,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195064420] [2024-11-20 22:00:35,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195064420] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 22:00:35,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 22:00:35,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 22:00:35,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478882511] [2024-11-20 22:00:35,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 22:00:35,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 22:00:35,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 22:00:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 22:00:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 22:00:35,658 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 89 [2024-11-20 22:00:35,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 79 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 45.4) internal successors, (227), 5 states have internal predecessors, (227), 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) [2024-11-20 22:00:35,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 22:00:35,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 89 [2024-11-20 22:00:35,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand