./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/popl20-figure1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 09:40:45,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 09:40:45,937 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-20 09:40:45,941 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 09:40:45,942 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 09:40:45,967 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 09:40:45,968 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 09:40:45,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 09:40:45,969 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 09:40:45,970 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 09:40:45,970 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 09:40:45,971 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 09:40:45,971 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 09:40:45,971 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 09:40:45,972 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 09:40:45,972 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 09:40:45,972 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-20 09:40:45,973 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 09:40:45,973 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 09:40:45,976 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 09:40:45,976 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 09:40:45,980 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-20 09:40:45,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 09:40:45,980 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-20 09:40:45,981 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 09:40:45,981 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 09:40:45,981 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-20 09:40:45,981 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 09:40:45,982 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 09:40:45,982 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 09:40:45,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 09:40:45,983 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 09:40:45,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:40:45,983 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 09:40:45,984 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 09:40:45,984 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-20 09:40:45,984 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 09:40:45,984 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 09:40:45,985 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 09:40:45,985 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 09:40:45,985 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 09:40:45,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 09:40:45,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> facd7612076746f2d167aef7303c13ba7b66236eba7a99773acf1e3861338848 [2024-11-20 09:40:46,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 09:40:46,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 09:40:46,255 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 09:40:46,256 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 09:40:46,256 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 09:40:46,258 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-20 09:40:47,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 09:40:47,887 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 09:40:47,887 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2024-11-20 09:40:47,895 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e859d2d/95171db448bb430b8b5c2a8d15eb03e2/FLAG00481b193 [2024-11-20 09:40:47,910 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30e859d2d/95171db448bb430b8b5c2a8d15eb03e2 [2024-11-20 09:40:47,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 09:40:47,914 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 09:40:47,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 09:40:47,916 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 09:40:47,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 09:40:47,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:40:47" (1/1) ... [2024-11-20 09:40:47,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f79316c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:47, skipping insertion in model container [2024-11-20 09:40:47,922 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:40:47" (1/1) ... [2024-11-20 09:40:47,944 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 09:40:48,155 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1825,1838] [2024-11-20 09:40:48,160 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:40:48,167 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 09:40:48,187 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[1825,1838] [2024-11-20 09:40:48,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 09:40:48,211 INFO L204 MainTranslator]: Completed translation [2024-11-20 09:40:48,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48 WrapperNode [2024-11-20 09:40:48,211 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 09:40:48,212 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 09:40:48,213 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 09:40:48,213 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 09:40:48,239 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,256 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,288 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2024-11-20 09:40:48,289 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 09:40:48,290 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 09:40:48,293 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 09:40:48,294 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 09:40:48,303 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,305 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,321 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 09:40:48,322 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,322 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,336 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,337 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,338 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,344 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 09:40:48,345 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 09:40:48,345 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 09:40:48,345 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 09:40:48,346 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (1/1) ... [2024-11-20 09:40:48,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 09:40:48,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:48,387 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 09:40:48,391 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 09:40:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 09:40:48,441 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 09:40:48,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 09:40:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 09:40:48,442 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 09:40:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 09:40:48,442 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 09:40:48,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 09:40:48,445 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 09:40:48,542 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 09:40:48,545 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 09:40:48,732 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 09:40:48,732 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 09:40:48,858 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 09:40:48,858 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-20 09:40:48,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:40:48 BoogieIcfgContainer [2024-11-20 09:40:48,859 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 09:40:48,862 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 09:40:48,862 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 09:40:48,866 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 09:40:48,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:40:47" (1/3) ... [2024-11-20 09:40:48,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9f2fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:40:48, skipping insertion in model container [2024-11-20 09:40:48,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:40:48" (2/3) ... [2024-11-20 09:40:48,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f9f2fa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:40:48, skipping insertion in model container [2024-11-20 09:40:48,868 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:40:48" (3/3) ... [2024-11-20 09:40:48,869 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2024-11-20 09:40:48,882 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 09:40:48,882 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-20 09:40:48,882 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 09:40:48,930 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 09:40:48,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 22 transitions, 58 flow [2024-11-20 09:40:49,003 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2024-11-20 09:40:49,003 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:40:49,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2024-11-20 09:40:49,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 22 transitions, 58 flow [2024-11-20 09:40:49,009 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 24 places, 19 transitions, 50 flow [2024-11-20 09:40:49,018 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 09:40:49,032 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;@77f9deb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 09:40:49,033 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-20 09:40:49,047 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 09:40:49,049 INFO L124 PetriNetUnfolderBase]: 2/18 cut-off events. [2024-11-20 09:40:49,049 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 09:40:49,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:49,050 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:49,051 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:49,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:49,060 INFO L85 PathProgramCache]: Analyzing trace with hash 865412045, now seen corresponding path program 1 times [2024-11-20 09:40:49,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:49,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576534621] [2024-11-20 09:40:49,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:49,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:49,322 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 09:40:49,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:49,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576534621] [2024-11-20 09:40:49,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576534621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:49,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:49,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 09:40:49,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754526063] [2024-11-20 09:40:49,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:49,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 09:40:49,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:49,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 09:40:49,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 09:40:49,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-20 09:40:49,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 09:40:49,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:49,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-20 09:40:49,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:49,478 INFO L124 PetriNetUnfolderBase]: 86/168 cut-off events. [2024-11-20 09:40:49,478 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-20 09:40:49,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 168 events. 86/168 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 506 event pairs, 32 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 297. Up to 108 conditions per place. [2024-11-20 09:40:49,484 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 21 selfloop transitions, 2 changer transitions 3/28 dead transitions. [2024-11-20 09:40:49,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 129 flow [2024-11-20 09:40:49,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 09:40:49,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 09:40:49,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 40 transitions. [2024-11-20 09:40:49,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-20 09:40:49,498 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 3 states and 40 transitions. [2024-11-20 09:40:49,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 129 flow [2024-11-20 09:40:49,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 09:40:49,504 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 56 flow [2024-11-20 09:40:49,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2024-11-20 09:40:49,511 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, -1 predicate places. [2024-11-20 09:40:49,512 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 56 flow [2024-11-20 09:40:49,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 09:40:49,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:49,513 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:49,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 09:40:49,514 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:49,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:49,515 INFO L85 PathProgramCache]: Analyzing trace with hash 528976037, now seen corresponding path program 1 times [2024-11-20 09:40:49,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:49,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403447791] [2024-11-20 09:40:49,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:49,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:49,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:49,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403447791] [2024-11-20 09:40:49,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403447791] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:49,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:49,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:40:49,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053893286] [2024-11-20 09:40:49,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:49,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:40:49,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:49,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:40:49,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:40:49,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:49,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 09:40:49,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:49,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:49,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:49,907 INFO L124 PetriNetUnfolderBase]: 151/272 cut-off events. [2024-11-20 09:40:49,907 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-20 09:40:49,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 272 events. 151/272 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 990 event pairs, 59 based on Foata normal form. 0/250 useless extension candidates. Maximal degree in co-relation 195. Up to 187 conditions per place. [2024-11-20 09:40:49,911 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 33 selfloop transitions, 7 changer transitions 3/44 dead transitions. [2024-11-20 09:40:49,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 44 transitions, 201 flow [2024-11-20 09:40:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:40:49,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:40:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-11-20 09:40:49,914 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-11-20 09:40:49,914 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 56 flow. Second operand 5 states and 59 transitions. [2024-11-20 09:40:49,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 44 transitions, 201 flow [2024-11-20 09:40:49,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 44 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:40:49,917 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 106 flow [2024-11-20 09:40:49,917 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2024-11-20 09:40:49,918 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 5 predicate places. [2024-11-20 09:40:49,918 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 106 flow [2024-11-20 09:40:49,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 09:40:49,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:49,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:49,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 09:40:49,920 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:49,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:49,920 INFO L85 PathProgramCache]: Analyzing trace with hash 882982957, now seen corresponding path program 2 times [2024-11-20 09:40:49,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:49,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195246627] [2024-11-20 09:40:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:49,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:50,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:50,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195246627] [2024-11-20 09:40:50,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195246627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:50,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:50,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 09:40:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016920269] [2024-11-20 09:40:50,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:50,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:40:50,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:50,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:40:50,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:40:50,069 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:50,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 106 flow. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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 09:40:50,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:50,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:50,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:50,283 INFO L124 PetriNetUnfolderBase]: 185/329 cut-off events. [2024-11-20 09:40:50,283 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-20 09:40:50,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 329 events. 185/329 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1234 event pairs, 4 based on Foata normal form. 13/342 useless extension candidates. Maximal degree in co-relation 435. Up to 148 conditions per place. [2024-11-20 09:40:50,293 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 48 selfloop transitions, 10 changer transitions 1/60 dead transitions. [2024-11-20 09:40:50,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 60 transitions, 345 flow [2024-11-20 09:40:50,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 09:40:50,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 09:40:50,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-11-20 09:40:50,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-20 09:40:50,297 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 106 flow. Second operand 7 states and 77 transitions. [2024-11-20 09:40:50,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 60 transitions, 345 flow [2024-11-20 09:40:50,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 60 transitions, 343 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-20 09:40:50,306 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 186 flow [2024-11-20 09:40:50,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=186, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2024-11-20 09:40:50,308 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 16 predicate places. [2024-11-20 09:40:50,308 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 186 flow [2024-11-20 09:40:50,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 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 09:40:50,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:50,310 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:50,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 09:40:50,310 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:50,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:50,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2138432043, now seen corresponding path program 3 times [2024-11-20 09:40:50,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:50,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619073872] [2024-11-20 09:40:50,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:50,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:50,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:50,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:50,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619073872] [2024-11-20 09:40:50,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619073872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:50,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:50,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:40:50,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67402778] [2024-11-20 09:40:50,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:50,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:40:50,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:40:50,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:40:50,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:50,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 09:40:50,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:50,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:50,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:50,568 INFO L124 PetriNetUnfolderBase]: 248/441 cut-off events. [2024-11-20 09:40:50,569 INFO L125 PetriNetUnfolderBase]: For 710/710 co-relation queries the response was YES. [2024-11-20 09:40:50,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1528 conditions, 441 events. 248/441 cut-off events. For 710/710 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1627 event pairs, 86 based on Foata normal form. 2/443 useless extension candidates. Maximal degree in co-relation 991. Up to 194 conditions per place. [2024-11-20 09:40:50,573 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 46 selfloop transitions, 10 changer transitions 2/59 dead transitions. [2024-11-20 09:40:50,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 59 transitions, 439 flow [2024-11-20 09:40:50,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:40:50,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:40:50,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 55 transitions. [2024-11-20 09:40:50,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-20 09:40:50,575 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 186 flow. Second operand 5 states and 55 transitions. [2024-11-20 09:40:50,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 59 transitions, 439 flow [2024-11-20 09:40:50,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 59 transitions, 436 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 09:40:50,582 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 237 flow [2024-11-20 09:40:50,582 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2024-11-20 09:40:50,584 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2024-11-20 09:40:50,584 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 237 flow [2024-11-20 09:40:50,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 09:40:50,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:50,587 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:50,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 09:40:50,587 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:50,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash -41786863, now seen corresponding path program 4 times [2024-11-20 09:40:50,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:50,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547942804] [2024-11-20 09:40:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:50,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547942804] [2024-11-20 09:40:50,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547942804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:50,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137938309] [2024-11-20 09:40:50,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:40:50,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:50,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:50,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:50,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 09:40:50,776 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:40:50,776 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:50,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 09:40:50,782 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:50,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:50,887 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:50,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137938309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:50,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:50,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-20 09:40:50,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595169764] [2024-11-20 09:40:50,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:50,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 09:40:50,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 09:40:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-20 09:40:50,944 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:50,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 237 flow. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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 09:40:50,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:50,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:50,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:51,262 INFO L124 PetriNetUnfolderBase]: 345/604 cut-off events. [2024-11-20 09:40:51,263 INFO L125 PetriNetUnfolderBase]: For 1399/1399 co-relation queries the response was YES. [2024-11-20 09:40:51,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2228 conditions, 604 events. 345/604 cut-off events. For 1399/1399 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2532 event pairs, 24 based on Foata normal form. 13/617 useless extension candidates. Maximal degree in co-relation 1917. Up to 147 conditions per place. [2024-11-20 09:40:51,270 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 70 selfloop transitions, 39 changer transitions 1/111 dead transitions. [2024-11-20 09:40:51,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 111 transitions, 845 flow [2024-11-20 09:40:51,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:40:51,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:40:51,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 145 transitions. [2024-11-20 09:40:51,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-11-20 09:40:51,273 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 237 flow. Second operand 15 states and 145 transitions. [2024-11-20 09:40:51,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 111 transitions, 845 flow [2024-11-20 09:40:51,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 111 transitions, 811 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-20 09:40:51,284 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 555 flow [2024-11-20 09:40:51,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=555, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-20 09:40:51,288 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 41 predicate places. [2024-11-20 09:40:51,288 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 555 flow [2024-11-20 09:40:51,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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 09:40:51,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:51,289 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:51,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 09:40:51,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:51,495 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:51,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:51,496 INFO L85 PathProgramCache]: Analyzing trace with hash 76889327, now seen corresponding path program 5 times [2024-11-20 09:40:51,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:51,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338890232] [2024-11-20 09:40:51,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:51,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:51,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:51,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338890232] [2024-11-20 09:40:51,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338890232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:51,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820647243] [2024-11-20 09:40:51,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:40:51,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:51,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:51,593 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:51,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 09:40:51,640 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:40:51,641 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:51,642 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-20 09:40:51,643 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:51,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:51,692 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:51,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820647243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:51,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:51,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-20 09:40:51,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300322994] [2024-11-20 09:40:51,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:51,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 09:40:51,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 09:40:51,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-20 09:40:51,739 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:51,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 555 flow. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 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 09:40:51,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:51,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:51,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:51,971 INFO L124 PetriNetUnfolderBase]: 331/588 cut-off events. [2024-11-20 09:40:51,973 INFO L125 PetriNetUnfolderBase]: For 2847/2847 co-relation queries the response was YES. [2024-11-20 09:40:51,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2568 conditions, 588 events. 331/588 cut-off events. For 2847/2847 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2475 event pairs, 58 based on Foata normal form. 13/601 useless extension candidates. Maximal degree in co-relation 2248. Up to 205 conditions per place. [2024-11-20 09:40:51,981 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 62 selfloop transitions, 35 changer transitions 1/99 dead transitions. [2024-11-20 09:40:51,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 1003 flow [2024-11-20 09:40:51,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 09:40:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 09:40:51,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-11-20 09:40:51,984 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-11-20 09:40:51,985 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 555 flow. Second operand 8 states and 86 transitions. [2024-11-20 09:40:51,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 1003 flow [2024-11-20 09:40:51,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 871 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-11-20 09:40:51,999 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 676 flow [2024-11-20 09:40:51,999 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=676, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-20 09:40:52,000 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 49 predicate places. [2024-11-20 09:40:52,000 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 676 flow [2024-11-20 09:40:52,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 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 09:40:52,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:52,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:52,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 09:40:52,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-20 09:40:52,202 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:52,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:52,202 INFO L85 PathProgramCache]: Analyzing trace with hash -548220071, now seen corresponding path program 6 times [2024-11-20 09:40:52,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:52,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26095471] [2024-11-20 09:40:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:52,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:52,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:52,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:52,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26095471] [2024-11-20 09:40:52,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26095471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:52,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 09:40:52,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 09:40:52,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197609926] [2024-11-20 09:40:52,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:52,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 09:40:52,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:52,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 09:40:52,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 09:40:52,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:52,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 09:40:52,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:52,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:52,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:52,421 INFO L124 PetriNetUnfolderBase]: 322/561 cut-off events. [2024-11-20 09:40:52,421 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2024-11-20 09:40:52,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2478 conditions, 561 events. 322/561 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2207 event pairs, 108 based on Foata normal form. 2/559 useless extension candidates. Maximal degree in co-relation 2283. Up to 322 conditions per place. [2024-11-20 09:40:52,427 INFO L140 encePairwiseOnDemand]: 16/22 looper letters, 56 selfloop transitions, 21 changer transitions 2/80 dead transitions. [2024-11-20 09:40:52,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 871 flow [2024-11-20 09:40:52,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:40:52,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:40:52,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 53 transitions. [2024-11-20 09:40:52,429 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-11-20 09:40:52,429 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 676 flow. Second operand 5 states and 53 transitions. [2024-11-20 09:40:52,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 871 flow [2024-11-20 09:40:52,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 80 transitions, 803 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-20 09:40:52,438 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 644 flow [2024-11-20 09:40:52,439 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=644, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-20 09:40:52,439 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 49 predicate places. [2024-11-20 09:40:52,439 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 644 flow [2024-11-20 09:40:52,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 09:40:52,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:52,440 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:52,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-20 09:40:52,440 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:52,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:52,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2142389920, now seen corresponding path program 1 times [2024-11-20 09:40:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:52,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956167649] [2024-11-20 09:40:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:52,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:40:52,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:52,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956167649] [2024-11-20 09:40:52,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956167649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:52,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509032709] [2024-11-20 09:40:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:52,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:52,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:52,541 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:52,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 09:40:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:52,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 09:40:52,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:52,624 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 09:40:52,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509032709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 09:40:52,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 09:40:52,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3] total 5 [2024-11-20 09:40:52,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751162513] [2024-11-20 09:40:52,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 09:40:52,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 09:40:52,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 09:40:52,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-20 09:40:52,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-20 09:40:52,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 644 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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 09:40:52,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:52,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-20 09:40:52,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:52,776 INFO L124 PetriNetUnfolderBase]: 498/916 cut-off events. [2024-11-20 09:40:52,777 INFO L125 PetriNetUnfolderBase]: For 4340/4344 co-relation queries the response was YES. [2024-11-20 09:40:52,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 916 events. 498/916 cut-off events. For 4340/4344 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4350 event pairs, 81 based on Foata normal form. 10/925 useless extension candidates. Maximal degree in co-relation 2873. Up to 411 conditions per place. [2024-11-20 09:40:52,786 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 103 selfloop transitions, 5 changer transitions 18/133 dead transitions. [2024-11-20 09:40:52,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 133 transitions, 1481 flow [2024-11-20 09:40:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 09:40:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 09:40:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 60 transitions. [2024-11-20 09:40:52,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-20 09:40:52,788 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 644 flow. Second operand 4 states and 60 transitions. [2024-11-20 09:40:52,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 133 transitions, 1481 flow [2024-11-20 09:40:52,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 133 transitions, 1391 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 09:40:52,829 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 610 flow [2024-11-20 09:40:52,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-11-20 09:40:52,829 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 48 predicate places. [2024-11-20 09:40:52,830 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 610 flow [2024-11-20 09:40:52,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 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 09:40:52,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:52,830 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:52,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 09:40:53,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:53,039 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:53,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:53,041 INFO L85 PathProgramCache]: Analyzing trace with hash -52621990, now seen corresponding path program 2 times [2024-11-20 09:40:53,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:53,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729731570] [2024-11-20 09:40:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:53,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:53,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:53,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729731570] [2024-11-20 09:40:53,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729731570] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:53,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216814230] [2024-11-20 09:40:53,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:40:53,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:53,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:53,130 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:53,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 09:40:53,182 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:40:53,182 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:53,183 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:40:53,185 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:53,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216814230] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:53,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:53,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-20 09:40:53,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815936904] [2024-11-20 09:40:53,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:53,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:40:53,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:53,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:40:53,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:40:53,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:53,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 610 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 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 09:40:53,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:53,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:53,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:54,052 INFO L124 PetriNetUnfolderBase]: 1095/1815 cut-off events. [2024-11-20 09:40:54,052 INFO L125 PetriNetUnfolderBase]: For 6935/6935 co-relation queries the response was YES. [2024-11-20 09:40:54,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7891 conditions, 1815 events. 1095/1815 cut-off events. For 6935/6935 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8364 event pairs, 48 based on Foata normal form. 56/1853 useless extension candidates. Maximal degree in co-relation 6134. Up to 363 conditions per place. [2024-11-20 09:40:54,069 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 131 selfloop transitions, 96 changer transitions 7/235 dead transitions. [2024-11-20 09:40:54,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 235 transitions, 2183 flow [2024-11-20 09:40:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 09:40:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-20 09:40:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 251 transitions. [2024-11-20 09:40:54,071 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4388111888111888 [2024-11-20 09:40:54,071 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 610 flow. Second operand 26 states and 251 transitions. [2024-11-20 09:40:54,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 235 transitions, 2183 flow [2024-11-20 09:40:54,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 235 transitions, 2183 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 09:40:54,088 INFO L231 Difference]: Finished difference. Result has 113 places, 122 transitions, 1444 flow [2024-11-20 09:40:54,088 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=610, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1444, PETRI_PLACES=113, PETRI_TRANSITIONS=122} [2024-11-20 09:40:54,089 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 89 predicate places. [2024-11-20 09:40:54,089 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 122 transitions, 1444 flow [2024-11-20 09:40:54,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 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 09:40:54,089 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:54,089 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:54,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 09:40:54,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:54,290 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:54,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:54,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1690812916, now seen corresponding path program 3 times [2024-11-20 09:40:54,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:54,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660553126] [2024-11-20 09:40:54,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:54,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:54,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:54,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:54,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660553126] [2024-11-20 09:40:54,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660553126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:54,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029987202] [2024-11-20 09:40:54,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:40:54,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:54,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:54,372 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:54,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 09:40:54,419 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 09:40:54,420 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:54,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:40:54,422 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:54,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:54,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029987202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:54,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:54,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:40:54,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633704320] [2024-11-20 09:40:54,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:54,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:40:54,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:54,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:40:54,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:40:54,575 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:54,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 122 transitions, 1444 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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 09:40:54,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:54,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:54,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:55,121 INFO L124 PetriNetUnfolderBase]: 1469/2422 cut-off events. [2024-11-20 09:40:55,121 INFO L125 PetriNetUnfolderBase]: For 27056/27056 co-relation queries the response was YES. [2024-11-20 09:40:55,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14775 conditions, 2422 events. 1469/2422 cut-off events. For 27056/27056 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11821 event pairs, 130 based on Foata normal form. 18/2440 useless extension candidates. Maximal degree in co-relation 11881. Up to 526 conditions per place. [2024-11-20 09:40:55,185 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 146 selfloop transitions, 87 changer transitions 3/237 dead transitions. [2024-11-20 09:40:55,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 237 transitions, 3071 flow [2024-11-20 09:40:55,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-20 09:40:55,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-20 09:40:55,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 168 transitions. [2024-11-20 09:40:55,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44919786096256686 [2024-11-20 09:40:55,187 INFO L175 Difference]: Start difference. First operand has 113 places, 122 transitions, 1444 flow. Second operand 17 states and 168 transitions. [2024-11-20 09:40:55,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 237 transitions, 3071 flow [2024-11-20 09:40:55,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 237 transitions, 2941 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-11-20 09:40:55,250 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 2057 flow [2024-11-20 09:40:55,250 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2057, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-11-20 09:40:55,251 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 104 predicate places. [2024-11-20 09:40:55,251 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 2057 flow [2024-11-20 09:40:55,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 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 09:40:55,252 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:55,252 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:55,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 09:40:55,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-20 09:40:55,453 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:55,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:55,453 INFO L85 PathProgramCache]: Analyzing trace with hash -270032684, now seen corresponding path program 4 times [2024-11-20 09:40:55,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:55,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304085957] [2024-11-20 09:40:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:55,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:55,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:55,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:55,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304085957] [2024-11-20 09:40:55,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304085957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:55,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269819555] [2024-11-20 09:40:55,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:40:55,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:55,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:55,583 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:55,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 09:40:55,630 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:40:55,631 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:55,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:40:55,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:55,703 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:55,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:55,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269819555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:55,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:55,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-20 09:40:55,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827089161] [2024-11-20 09:40:55,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:55,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 09:40:55,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 09:40:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-20 09:40:55,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:55,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 2057 flow. Second operand has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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 09:40:55,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:55,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:55,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:56,522 INFO L124 PetriNetUnfolderBase]: 1766/2917 cut-off events. [2024-11-20 09:40:56,523 INFO L125 PetriNetUnfolderBase]: For 45095/45095 co-relation queries the response was YES. [2024-11-20 09:40:56,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19052 conditions, 2917 events. 1766/2917 cut-off events. For 45095/45095 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14860 event pairs, 102 based on Foata normal form. 30/2947 useless extension candidates. Maximal degree in co-relation 16096. Up to 843 conditions per place. [2024-11-20 09:40:56,566 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 133 selfloop transitions, 137 changer transitions 24/295 dead transitions. [2024-11-20 09:40:56,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 295 transitions, 4135 flow [2024-11-20 09:40:56,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-20 09:40:56,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-20 09:40:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 144 transitions. [2024-11-20 09:40:56,568 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-11-20 09:40:56,568 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 2057 flow. Second operand 15 states and 144 transitions. [2024-11-20 09:40:56,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 295 transitions, 4135 flow [2024-11-20 09:40:56,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 295 transitions, 3651 flow, removed 229 selfloop flow, removed 3 redundant places. [2024-11-20 09:40:56,704 INFO L231 Difference]: Finished difference. Result has 146 places, 206 transitions, 2879 flow [2024-11-20 09:40:56,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=1752, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2879, PETRI_PLACES=146, PETRI_TRANSITIONS=206} [2024-11-20 09:40:56,706 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 122 predicate places. [2024-11-20 09:40:56,707 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 206 transitions, 2879 flow [2024-11-20 09:40:56,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.2727272727272725) internal successors, (69), 11 states have internal predecessors, (69), 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 09:40:56,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:56,707 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:56,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 09:40:56,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:56,908 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:56,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:56,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1119307828, now seen corresponding path program 5 times [2024-11-20 09:40:56,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:56,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558172393] [2024-11-20 09:40:56,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:56,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:56,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:56,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558172393] [2024-11-20 09:40:56,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558172393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:56,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145416255] [2024-11-20 09:40:56,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:40:56,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:56,981 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:56,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 09:40:57,107 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-20 09:40:57,107 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:57,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:40:57,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:57,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:57,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145416255] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:57,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:57,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-20 09:40:57,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934529437] [2024-11-20 09:40:57,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:57,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:40:57,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:57,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:40:57,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-20 09:40:57,236 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:57,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 206 transitions, 2879 flow. Second operand has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 09:40:57,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:57,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:57,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:40:58,348 INFO L124 PetriNetUnfolderBase]: 2023/3316 cut-off events. [2024-11-20 09:40:58,348 INFO L125 PetriNetUnfolderBase]: For 58633/58633 co-relation queries the response was YES. [2024-11-20 09:40:58,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22098 conditions, 3316 events. 2023/3316 cut-off events. For 58633/58633 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17136 event pairs, 70 based on Foata normal form. 52/3368 useless extension candidates. Maximal degree in co-relation 21012. Up to 676 conditions per place. [2024-11-20 09:40:58,378 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 171 selfloop transitions, 186 changer transitions 2/360 dead transitions. [2024-11-20 09:40:58,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 360 transitions, 5212 flow [2024-11-20 09:40:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 09:40:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-20 09:40:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 251 transitions. [2024-11-20 09:40:58,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4388111888111888 [2024-11-20 09:40:58,380 INFO L175 Difference]: Start difference. First operand has 146 places, 206 transitions, 2879 flow. Second operand 26 states and 251 transitions. [2024-11-20 09:40:58,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 360 transitions, 5212 flow [2024-11-20 09:40:58,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 360 transitions, 5017 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-11-20 09:40:58,522 INFO L231 Difference]: Finished difference. Result has 181 places, 245 transitions, 4054 flow [2024-11-20 09:40:58,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=4054, PETRI_PLACES=181, PETRI_TRANSITIONS=245} [2024-11-20 09:40:58,524 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 157 predicate places. [2024-11-20 09:40:58,525 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 245 transitions, 4054 flow [2024-11-20 09:40:58,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.0) internal successors, (72), 12 states have internal predecessors, (72), 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 09:40:58,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:40:58,525 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:40:58,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 09:40:58,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:58,729 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:40:58,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:40:58,730 INFO L85 PathProgramCache]: Analyzing trace with hash 430169670, now seen corresponding path program 6 times [2024-11-20 09:40:58,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:40:58,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340312843] [2024-11-20 09:40:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:40:58,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:40:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:40:58,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:58,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:40:58,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340312843] [2024-11-20 09:40:58,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340312843] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:40:58,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753141304] [2024-11-20 09:40:58,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:40:58,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:40:58,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:40:58,866 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:40:58,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 09:40:58,909 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-20 09:40:58,910 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:40:58,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:40:58,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:40:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:58,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:40:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:40:59,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753141304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:40:59,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:40:59,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-20 09:40:59,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785261439] [2024-11-20 09:40:59,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:40:59,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:40:59,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:40:59,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:40:59,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:40:59,068 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:40:59,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 245 transitions, 4054 flow. Second operand has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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 09:40:59,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:40:59,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:40:59,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:00,220 INFO L124 PetriNetUnfolderBase]: 2553/4224 cut-off events. [2024-11-20 09:41:00,220 INFO L125 PetriNetUnfolderBase]: For 114827/114827 co-relation queries the response was YES. [2024-11-20 09:41:00,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32163 conditions, 4224 events. 2553/4224 cut-off events. For 114827/114827 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 23432 event pairs, 108 based on Foata normal form. 40/4264 useless extension candidates. Maximal degree in co-relation 30457. Up to 1349 conditions per place. [2024-11-20 09:41:00,282 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 188 selfloop transitions, 215 changer transitions 2/406 dead transitions. [2024-11-20 09:41:00,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 406 transitions, 7113 flow [2024-11-20 09:41:00,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 09:41:00,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 09:41:00,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 157 transitions. [2024-11-20 09:41:00,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-11-20 09:41:00,284 INFO L175 Difference]: Start difference. First operand has 181 places, 245 transitions, 4054 flow. Second operand 16 states and 157 transitions. [2024-11-20 09:41:00,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 406 transitions, 7113 flow [2024-11-20 09:41:00,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 406 transitions, 6643 flow, removed 151 selfloop flow, removed 11 redundant places. [2024-11-20 09:41:00,714 INFO L231 Difference]: Finished difference. Result has 192 places, 311 transitions, 5722 flow [2024-11-20 09:41:00,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=3695, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5722, PETRI_PLACES=192, PETRI_TRANSITIONS=311} [2024-11-20 09:41:00,716 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 168 predicate places. [2024-11-20 09:41:00,716 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 311 transitions, 5722 flow [2024-11-20 09:41:00,717 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.384615384615385) internal successors, (83), 13 states have internal predecessors, (83), 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 09:41:00,717 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:00,717 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:00,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:00,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-20 09:41:00,918 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:00,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:00,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1258067090, now seen corresponding path program 7 times [2024-11-20 09:41:00,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:00,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102995791] [2024-11-20 09:41:00,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:00,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:00,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:00,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102995791] [2024-11-20 09:41:00,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102995791] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:00,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834863719] [2024-11-20 09:41:00,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:41:00,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:00,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:00,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:00,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 09:41:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:01,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:41:01,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:01,095 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:01,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834863719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:01,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:01,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-20 09:41:01,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610219422] [2024-11-20 09:41:01,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:01,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 09:41:01,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:01,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 09:41:01,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-20 09:41:01,144 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:41:01,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 311 transitions, 5722 flow. Second operand has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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 09:41:01,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:01,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:41:01,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:02,188 INFO L124 PetriNetUnfolderBase]: 2559/4246 cut-off events. [2024-11-20 09:41:02,188 INFO L125 PetriNetUnfolderBase]: For 127695/127695 co-relation queries the response was YES. [2024-11-20 09:41:02,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34110 conditions, 4246 events. 2559/4246 cut-off events. For 127695/127695 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 23873 event pairs, 307 based on Foata normal form. 8/4254 useless extension candidates. Maximal degree in co-relation 32260. Up to 1034 conditions per place. [2024-11-20 09:41:02,358 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 225 selfloop transitions, 160 changer transitions 4/390 dead transitions. [2024-11-20 09:41:02,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 390 transitions, 7495 flow [2024-11-20 09:41:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 09:41:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 09:41:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 141 transitions. [2024-11-20 09:41:02,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.493006993006993 [2024-11-20 09:41:02,359 INFO L175 Difference]: Start difference. First operand has 192 places, 311 transitions, 5722 flow. Second operand 13 states and 141 transitions. [2024-11-20 09:41:02,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 390 transitions, 7495 flow [2024-11-20 09:41:02,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 390 transitions, 7415 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-11-20 09:41:02,848 INFO L231 Difference]: Finished difference. Result has 200 places, 309 transitions, 5983 flow [2024-11-20 09:41:02,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5983, PETRI_PLACES=200, PETRI_TRANSITIONS=309} [2024-11-20 09:41:02,849 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 176 predicate places. [2024-11-20 09:41:02,849 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 309 transitions, 5983 flow [2024-11-20 09:41:02,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.916666666666667) internal successors, (71), 12 states have internal predecessors, (71), 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 09:41:02,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:02,850 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:02,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:03,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-20 09:41:03,051 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:03,051 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:03,051 INFO L85 PathProgramCache]: Analyzing trace with hash -128314632, now seen corresponding path program 8 times [2024-11-20 09:41:03,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:03,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834417000] [2024-11-20 09:41:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:03,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:03,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834417000] [2024-11-20 09:41:03,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834417000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:03,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079418349] [2024-11-20 09:41:03,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:41:03,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:03,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:03,129 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:03,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 09:41:03,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:41:03,177 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:03,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:41:03,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:03,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:03,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079418349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:03,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:03,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-20 09:41:03,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660947698] [2024-11-20 09:41:03,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:03,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:41:03,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:03,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:41:03,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:41:03,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:41:03,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 309 transitions, 5983 flow. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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 09:41:03,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:03,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:41:03,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:04,499 INFO L124 PetriNetUnfolderBase]: 2784/4601 cut-off events. [2024-11-20 09:41:04,499 INFO L125 PetriNetUnfolderBase]: For 152594/152594 co-relation queries the response was YES. [2024-11-20 09:41:04,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38434 conditions, 4601 events. 2784/4601 cut-off events. For 152594/152594 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 25811 event pairs, 183 based on Foata normal form. 54/4655 useless extension candidates. Maximal degree in co-relation 36498. Up to 917 conditions per place. [2024-11-20 09:41:04,543 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 166 selfloop transitions, 297 changer transitions 6/470 dead transitions. [2024-11-20 09:41:04,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 470 transitions, 9242 flow [2024-11-20 09:41:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-20 09:41:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-20 09:41:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 234 transitions. [2024-11-20 09:41:04,545 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4254545454545455 [2024-11-20 09:41:04,545 INFO L175 Difference]: Start difference. First operand has 200 places, 309 transitions, 5983 flow. Second operand 25 states and 234 transitions. [2024-11-20 09:41:04,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 470 transitions, 9242 flow [2024-11-20 09:41:05,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 470 transitions, 8886 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-11-20 09:41:05,094 INFO L231 Difference]: Finished difference. Result has 218 places, 366 transitions, 8002 flow [2024-11-20 09:41:05,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=5637, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=8002, PETRI_PLACES=218, PETRI_TRANSITIONS=366} [2024-11-20 09:41:05,095 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 194 predicate places. [2024-11-20 09:41:05,095 INFO L471 AbstractCegarLoop]: Abstraction has has 218 places, 366 transitions, 8002 flow [2024-11-20 09:41:05,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 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 09:41:05,095 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:05,096 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:05,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:05,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-20 09:41:05,296 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:05,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:05,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1851687192, now seen corresponding path program 9 times [2024-11-20 09:41:05,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:05,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762108805] [2024-11-20 09:41:05,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:05,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:05,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:05,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762108805] [2024-11-20 09:41:05,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762108805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:05,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167121382] [2024-11-20 09:41:05,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:41:05,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:05,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:05,370 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:05,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 09:41:05,416 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 09:41:05,416 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:05,417 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:41:05,418 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:05,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:05,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167121382] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:05,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:05,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:05,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805019245] [2024-11-20 09:41:05,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:05,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:05,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:05,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:05,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:05,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:41:05,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 366 transitions, 8002 flow. Second operand has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 09:41:05,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:05,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:41:05,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:07,110 INFO L124 PetriNetUnfolderBase]: 3137/5230 cut-off events. [2024-11-20 09:41:07,110 INFO L125 PetriNetUnfolderBase]: For 197403/197403 co-relation queries the response was YES. [2024-11-20 09:41:07,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46330 conditions, 5230 events. 3137/5230 cut-off events. For 197403/197403 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 30606 event pairs, 147 based on Foata normal form. 30/5260 useless extension candidates. Maximal degree in co-relation 43619. Up to 1015 conditions per place. [2024-11-20 09:41:07,161 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 234 selfloop transitions, 319 changer transitions 6/560 dead transitions. [2024-11-20 09:41:07,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 560 transitions, 12026 flow [2024-11-20 09:41:07,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-20 09:41:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-20 09:41:07,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 271 transitions. [2024-11-20 09:41:07,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42476489028213166 [2024-11-20 09:41:07,166 INFO L175 Difference]: Start difference. First operand has 218 places, 366 transitions, 8002 flow. Second operand 29 states and 271 transitions. [2024-11-20 09:41:07,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 560 transitions, 12026 flow [2024-11-20 09:41:07,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 560 transitions, 11519 flow, removed 129 selfloop flow, removed 14 redundant places. [2024-11-20 09:41:08,001 INFO L231 Difference]: Finished difference. Result has 237 places, 415 transitions, 9661 flow [2024-11-20 09:41:08,002 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=7552, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9661, PETRI_PLACES=237, PETRI_TRANSITIONS=415} [2024-11-20 09:41:08,002 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 213 predicate places. [2024-11-20 09:41:08,002 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 415 transitions, 9661 flow [2024-11-20 09:41:08,003 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.0) internal successors, (90), 15 states have internal predecessors, (90), 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 09:41:08,003 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:08,003 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:08,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:08,203 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-20 09:41:08,203 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:08,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:08,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1658996268, now seen corresponding path program 10 times [2024-11-20 09:41:08,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:08,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228629121] [2024-11-20 09:41:08,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:08,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:08,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:08,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228629121] [2024-11-20 09:41:08,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228629121] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:08,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25003043] [2024-11-20 09:41:08,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:41:08,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:08,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:08,280 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:08,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 09:41:08,318 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:41:08,319 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:08,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:41:08,320 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:08,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:08,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25003043] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:08,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:08,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:08,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239280928] [2024-11-20 09:41:08,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:08,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:08,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:08,444 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:41:08,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 415 transitions, 9661 flow. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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 09:41:08,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:08,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:41:08,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:09,819 INFO L124 PetriNetUnfolderBase]: 3539/5879 cut-off events. [2024-11-20 09:41:09,819 INFO L125 PetriNetUnfolderBase]: For 260451/260451 co-relation queries the response was YES. [2024-11-20 09:41:09,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53711 conditions, 5879 events. 3539/5879 cut-off events. For 260451/260451 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 35120 event pairs, 1262 based on Foata normal form. 18/5897 useless extension candidates. Maximal degree in co-relation 51460. Up to 4496 conditions per place. [2024-11-20 09:41:09,879 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 454 selfloop transitions, 70 changer transitions 2/527 dead transitions. [2024-11-20 09:41:09,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 527 transitions, 12373 flow [2024-11-20 09:41:09,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 09:41:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 09:41:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 156 transitions. [2024-11-20 09:41:09,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-11-20 09:41:09,881 INFO L175 Difference]: Start difference. First operand has 237 places, 415 transitions, 9661 flow. Second operand 16 states and 156 transitions. [2024-11-20 09:41:09,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 527 transitions, 12373 flow [2024-11-20 09:41:11,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 527 transitions, 11852 flow, removed 55 selfloop flow, removed 15 redundant places. [2024-11-20 09:41:11,129 INFO L231 Difference]: Finished difference. Result has 243 places, 448 transitions, 10108 flow [2024-11-20 09:41:11,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9198, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=10108, PETRI_PLACES=243, PETRI_TRANSITIONS=448} [2024-11-20 09:41:11,130 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 219 predicate places. [2024-11-20 09:41:11,130 INFO L471 AbstractCegarLoop]: Abstraction has has 243 places, 448 transitions, 10108 flow [2024-11-20 09:41:11,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 15 states have internal predecessors, (84), 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 09:41:11,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:11,130 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:11,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:11,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 09:41:11,331 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:11,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:11,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1207569816, now seen corresponding path program 11 times [2024-11-20 09:41:11,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:11,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735616040] [2024-11-20 09:41:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:11,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:11,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:11,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735616040] [2024-11-20 09:41:11,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735616040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:11,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392650479] [2024-11-20 09:41:11,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:41:11,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:11,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:11,397 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:11,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 09:41:11,445 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-20 09:41:11,445 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:11,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:41:11,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:11,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:11,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:11,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392650479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:11,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:11,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-20 09:41:11,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515259248] [2024-11-20 09:41:11,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:11,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 09:41:11,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 09:41:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-11-20 09:41:11,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:41:11,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 448 transitions, 10108 flow. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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 09:41:11,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:11,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:41:11,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:13,160 INFO L124 PetriNetUnfolderBase]: 3886/6431 cut-off events. [2024-11-20 09:41:13,160 INFO L125 PetriNetUnfolderBase]: For 317299/317299 co-relation queries the response was YES. [2024-11-20 09:41:13,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59694 conditions, 6431 events. 3886/6431 cut-off events. For 317299/317299 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 38669 event pairs, 610 based on Foata normal form. 84/6515 useless extension candidates. Maximal degree in co-relation 57470. Up to 2729 conditions per place. [2024-11-20 09:41:13,236 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 347 selfloop transitions, 242 changer transitions 3/593 dead transitions. [2024-11-20 09:41:13,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 593 transitions, 13602 flow [2024-11-20 09:41:13,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-20 09:41:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-20 09:41:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 201 transitions. [2024-11-20 09:41:13,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-11-20 09:41:13,238 INFO L175 Difference]: Start difference. First operand has 243 places, 448 transitions, 10108 flow. Second operand 20 states and 201 transitions. [2024-11-20 09:41:13,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 593 transitions, 13602 flow [2024-11-20 09:41:14,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 593 transitions, 13283 flow, removed 129 selfloop flow, removed 6 redundant places. [2024-11-20 09:41:14,843 INFO L231 Difference]: Finished difference. Result has 267 places, 480 transitions, 11720 flow [2024-11-20 09:41:14,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=9812, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=11720, PETRI_PLACES=267, PETRI_TRANSITIONS=480} [2024-11-20 09:41:14,844 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 243 predicate places. [2024-11-20 09:41:14,845 INFO L471 AbstractCegarLoop]: Abstraction has has 267 places, 480 transitions, 11720 flow [2024-11-20 09:41:14,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 15 states have internal predecessors, (88), 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 09:41:14,845 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:14,845 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:14,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:15,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 09:41:15,046 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:15,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:15,046 INFO L85 PathProgramCache]: Analyzing trace with hash 221984848, now seen corresponding path program 12 times [2024-11-20 09:41:15,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:15,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512083057] [2024-11-20 09:41:15,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:15,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:15,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:15,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512083057] [2024-11-20 09:41:15,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512083057] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:15,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101872362] [2024-11-20 09:41:15,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 09:41:15,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:15,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:15,185 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:15,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 09:41:15,227 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 09:41:15,228 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:15,228 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:41:15,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:15,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:15,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:15,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:41:15,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101872362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:15,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:15,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-20 09:41:15,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466334400] [2024-11-20 09:41:15,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:15,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:41:15,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:41:15,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:41:15,337 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:41:15,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 480 transitions, 11720 flow. Second operand has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 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 09:41:15,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:15,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:41:15,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:16,809 INFO L124 PetriNetUnfolderBase]: 4068/6724 cut-off events. [2024-11-20 09:41:16,809 INFO L125 PetriNetUnfolderBase]: For 398466/398466 co-relation queries the response was YES. [2024-11-20 09:41:17,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66684 conditions, 6724 events. 4068/6724 cut-off events. For 398466/398466 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 40562 event pairs, 608 based on Foata normal form. 54/6778 useless extension candidates. Maximal degree in co-relation 66135. Up to 2546 conditions per place. [2024-11-20 09:41:17,092 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 320 selfloop transitions, 271 changer transitions 2/594 dead transitions. [2024-11-20 09:41:17,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 594 transitions, 14808 flow [2024-11-20 09:41:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 09:41:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 09:41:17,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 170 transitions. [2024-11-20 09:41:17,095 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-11-20 09:41:17,095 INFO L175 Difference]: Start difference. First operand has 267 places, 480 transitions, 11720 flow. Second operand 18 states and 170 transitions. [2024-11-20 09:41:17,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 594 transitions, 14808 flow [2024-11-20 09:41:18,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 594 transitions, 14433 flow, removed 174 selfloop flow, removed 3 redundant places. [2024-11-20 09:41:18,759 INFO L231 Difference]: Finished difference. Result has 288 places, 503 transitions, 13124 flow [2024-11-20 09:41:18,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=11430, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13124, PETRI_PLACES=288, PETRI_TRANSITIONS=503} [2024-11-20 09:41:18,760 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 264 predicate places. [2024-11-20 09:41:18,760 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 503 transitions, 13124 flow [2024-11-20 09:41:18,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.076923076923077) internal successors, (79), 13 states have internal predecessors, (79), 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 09:41:18,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:18,760 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:18,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:18,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:18,961 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:18,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:18,961 INFO L85 PathProgramCache]: Analyzing trace with hash -866713966, now seen corresponding path program 13 times [2024-11-20 09:41:18,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:18,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132367621] [2024-11-20 09:41:18,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:18,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:19,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:19,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132367621] [2024-11-20 09:41:19,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132367621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:19,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752748321] [2024-11-20 09:41:19,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-20 09:41:19,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:19,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:19,024 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:19,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 09:41:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:19,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 09:41:19,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:19,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:41:19,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752748321] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:19,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:19,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-11-20 09:41:19,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987033978] [2024-11-20 09:41:19,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:19,171 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 09:41:19,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:19,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 09:41:19,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-20 09:41:19,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:41:19,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 503 transitions, 13124 flow. Second operand has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 09:41:19,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:19,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:41:19,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:20,763 INFO L124 PetriNetUnfolderBase]: 4065/6719 cut-off events. [2024-11-20 09:41:20,763 INFO L125 PetriNetUnfolderBase]: For 428080/428080 co-relation queries the response was YES. [2024-11-20 09:41:20,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69223 conditions, 6719 events. 4065/6719 cut-off events. For 428080/428080 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 40711 event pairs, 1511 based on Foata normal form. 8/6727 useless extension candidates. Maximal degree in co-relation 68556. Up to 5394 conditions per place. [2024-11-20 09:41:21,020 INFO L140 encePairwiseOnDemand]: 15/22 looper letters, 482 selfloop transitions, 70 changer transitions 2/555 dead transitions. [2024-11-20 09:41:21,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 555 transitions, 14906 flow [2024-11-20 09:41:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 09:41:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 09:41:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-11-20 09:41:21,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2024-11-20 09:41:21,022 INFO L175 Difference]: Start difference. First operand has 288 places, 503 transitions, 13124 flow. Second operand 11 states and 115 transitions. [2024-11-20 09:41:21,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 555 transitions, 14906 flow [2024-11-20 09:41:22,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 555 transitions, 14660 flow, removed 74 selfloop flow, removed 13 redundant places. [2024-11-20 09:41:22,714 INFO L231 Difference]: Finished difference. Result has 283 places, 500 transitions, 13009 flow [2024-11-20 09:41:22,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12846, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13009, PETRI_PLACES=283, PETRI_TRANSITIONS=500} [2024-11-20 09:41:22,715 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 259 predicate places. [2024-11-20 09:41:22,715 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 500 transitions, 13009 flow [2024-11-20 09:41:22,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.0) internal successors, (78), 13 states have internal predecessors, (78), 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 09:41:22,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:22,715 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:22,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 09:41:22,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:22,916 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:22,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:22,916 INFO L85 PathProgramCache]: Analyzing trace with hash 857992749, now seen corresponding path program 14 times [2024-11-20 09:41:22,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:22,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491347512] [2024-11-20 09:41:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:22,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 09:41:22,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:22,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491347512] [2024-11-20 09:41:22,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491347512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:22,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670293454] [2024-11-20 09:41:22,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 09:41:22,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:22,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:22,988 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:22,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 09:41:23,033 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 09:41:23,033 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:23,033 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-20 09:41:23,034 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:23,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:23,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670293454] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:23,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:23,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 7 [2024-11-20 09:41:23,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270161906] [2024-11-20 09:41:23,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:23,126 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 09:41:23,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:23,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 09:41:23,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-20 09:41:23,127 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 22 [2024-11-20 09:41:23,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 500 transitions, 13009 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 09:41:23,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:23,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 22 [2024-11-20 09:41:23,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:25,622 INFO L124 PetriNetUnfolderBase]: 6280/10721 cut-off events. [2024-11-20 09:41:25,622 INFO L125 PetriNetUnfolderBase]: For 636689/637168 co-relation queries the response was YES. [2024-11-20 09:41:25,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109222 conditions, 10721 events. 6280/10721 cut-off events. For 636689/637168 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 75305 event pairs, 539 based on Foata normal form. 191/10831 useless extension candidates. Maximal degree in co-relation 107503. Up to 3220 conditions per place. [2024-11-20 09:41:25,756 INFO L140 encePairwiseOnDemand]: 17/22 looper letters, 1077 selfloop transitions, 10 changer transitions 146/1285 dead transitions. [2024-11-20 09:41:25,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1285 transitions, 36997 flow [2024-11-20 09:41:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 09:41:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 09:41:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-20 09:41:25,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7090909090909091 [2024-11-20 09:41:25,757 INFO L175 Difference]: Start difference. First operand has 283 places, 500 transitions, 13009 flow. Second operand 5 states and 78 transitions. [2024-11-20 09:41:25,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1285 transitions, 36997 flow [2024-11-20 09:41:30,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 1285 transitions, 36745 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-20 09:41:30,117 INFO L231 Difference]: Finished difference. Result has 280 places, 496 transitions, 12728 flow [2024-11-20 09:41:30,117 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12902, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=12728, PETRI_PLACES=280, PETRI_TRANSITIONS=496} [2024-11-20 09:41:30,118 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 256 predicate places. [2024-11-20 09:41:30,118 INFO L471 AbstractCegarLoop]: Abstraction has has 280 places, 496 transitions, 12728 flow [2024-11-20 09:41:30,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 states have internal predecessors, (69), 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 09:41:30,118 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:30,118 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:30,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-20 09:41:30,318 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:30,319 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:30,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:30,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1436938919, now seen corresponding path program 15 times [2024-11-20 09:41:30,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:30,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050339640] [2024-11-20 09:41:30,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:30,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:30,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:30,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050339640] [2024-11-20 09:41:30,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050339640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:30,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142593992] [2024-11-20 09:41:30,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 09:41:30,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:30,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:30,405 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:30,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 09:41:30,449 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-20 09:41:30,449 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:30,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:41:30,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:30,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:30,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:30,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142593992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:30,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:30,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-20 09:41:30,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745804869] [2024-11-20 09:41:30,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:30,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 09:41:30,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:30,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 09:41:30,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2024-11-20 09:41:30,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:41:30,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 496 transitions, 12728 flow. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 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 09:41:30,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:30,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:41:30,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:35,434 INFO L124 PetriNetUnfolderBase]: 9846/16108 cut-off events. [2024-11-20 09:41:35,434 INFO L125 PetriNetUnfolderBase]: For 1104086/1104086 co-relation queries the response was YES. [2024-11-20 09:41:35,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174441 conditions, 16108 events. 9846/16108 cut-off events. For 1104086/1104086 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 109905 event pairs, 331 based on Foata normal form. 185/16293 useless extension candidates. Maximal degree in co-relation 172764. Up to 3161 conditions per place. [2024-11-20 09:41:35,965 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 455 selfloop transitions, 600 changer transitions 31/1087 dead transitions. [2024-11-20 09:41:35,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 1087 transitions, 27650 flow [2024-11-20 09:41:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-20 09:41:35,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-20 09:41:35,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 416 transitions. [2024-11-20 09:41:35,967 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4297520661157025 [2024-11-20 09:41:35,967 INFO L175 Difference]: Start difference. First operand has 280 places, 496 transitions, 12728 flow. Second operand 44 states and 416 transitions. [2024-11-20 09:41:35,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 1087 transitions, 27650 flow [2024-11-20 09:41:43,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1087 transitions, 27482 flow, removed 84 selfloop flow, removed 0 redundant places. [2024-11-20 09:41:43,340 INFO L231 Difference]: Finished difference. Result has 343 places, 732 transitions, 21688 flow [2024-11-20 09:41:43,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=12720, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=367, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=21688, PETRI_PLACES=343, PETRI_TRANSITIONS=732} [2024-11-20 09:41:43,341 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 319 predicate places. [2024-11-20 09:41:43,342 INFO L471 AbstractCegarLoop]: Abstraction has has 343 places, 732 transitions, 21688 flow [2024-11-20 09:41:43,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 20 states have internal predecessors, (124), 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 09:41:43,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:41:43,342 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:41:43,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-20 09:41:43,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:43,543 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:41:43,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:41:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash -203036361, now seen corresponding path program 16 times [2024-11-20 09:41:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:41:43,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051635261] [2024-11-20 09:41:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:41:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:41:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:41:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:43,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:41:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051635261] [2024-11-20 09:41:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051635261] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:41:43,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143072563] [2024-11-20 09:41:43,634 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 09:41:43,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:41:43,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:41:43,637 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:41:43,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 09:41:43,682 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 09:41:43,682 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:41:43,683 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:41:43,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:41:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:43,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:41:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:41:43,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143072563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:41:43,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:41:43,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-20 09:41:43,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437223741] [2024-11-20 09:41:43,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:41:43,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 09:41:43,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:41:43,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 09:41:43,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-11-20 09:41:43,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:41:43,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 732 transitions, 21688 flow. Second operand has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 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 09:41:43,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:41:43,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:41:43,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 09:41:50,406 INFO L124 PetriNetUnfolderBase]: 11866/19412 cut-off events. [2024-11-20 09:41:50,406 INFO L125 PetriNetUnfolderBase]: For 1719624/1719624 co-relation queries the response was YES. [2024-11-20 09:41:50,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230463 conditions, 19412 events. 11866/19412 cut-off events. For 1719624/1719624 co-relation queries the response was YES. Maximal size of possible extension queue 732. Compared 135639 event pairs, 570 based on Foata normal form. 71/19483 useless extension candidates. Maximal degree in co-relation 228462. Up to 6382 conditions per place. [2024-11-20 09:41:50,686 INFO L140 encePairwiseOnDemand]: 14/22 looper letters, 441 selfloop transitions, 857 changer transitions 73/1372 dead transitions. [2024-11-20 09:41:50,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1372 transitions, 41134 flow [2024-11-20 09:41:50,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-20 09:41:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-20 09:41:50,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 183 transitions. [2024-11-20 09:41:50,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43779904306220097 [2024-11-20 09:41:50,687 INFO L175 Difference]: Start difference. First operand has 343 places, 732 transitions, 21688 flow. Second operand 19 states and 183 transitions. [2024-11-20 09:41:50,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1372 transitions, 41134 flow [2024-11-20 09:42:05,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1372 transitions, 39078 flow, removed 648 selfloop flow, removed 15 redundant places. [2024-11-20 09:42:05,690 INFO L231 Difference]: Finished difference. Result has 355 places, 1100 transitions, 34833 flow [2024-11-20 09:42:05,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=20771, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=34833, PETRI_PLACES=355, PETRI_TRANSITIONS=1100} [2024-11-20 09:42:05,691 INFO L277 CegarLoopForPetriNet]: 24 programPoint places, 331 predicate places. [2024-11-20 09:42:05,692 INFO L471 AbstractCegarLoop]: Abstraction has has 355 places, 1100 transitions, 34833 flow [2024-11-20 09:42:05,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.071428571428571) internal successors, (85), 14 states have internal predecessors, (85), 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 09:42:05,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 09:42:05,692 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 09:42:05,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-20 09:42:05,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:42:05,892 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-20 09:42:05,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 09:42:05,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2113778485, now seen corresponding path program 17 times [2024-11-20 09:42:05,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 09:42:05,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235975686] [2024-11-20 09:42:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 09:42:05,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 09:42:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 09:42:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:05,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 09:42:05,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235975686] [2024-11-20 09:42:05,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235975686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 09:42:05,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878100634] [2024-11-20 09:42:05,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 09:42:05,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 09:42:05,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 09:42:05,972 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 09:42:05,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 09:42:06,019 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-20 09:42:06,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 09:42:06,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 09:42:06,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 09:42:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:06,100 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 09:42:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 09:42:06,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878100634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 09:42:06,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 09:42:06,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-11-20 09:42:06,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125646136] [2024-11-20 09:42:06,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 09:42:06,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 09:42:06,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 09:42:06,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 09:42:06,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2024-11-20 09:42:06,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 22 [2024-11-20 09:42:06,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1100 transitions, 34833 flow. Second operand has 16 states, 16 states have (on average 5.8125) internal successors, (93), 16 states have internal predecessors, (93), 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 09:42:06,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 09:42:06,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 22 [2024-11-20 09:42:06,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand