./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_safe-5.i -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 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:05:48,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:05:48,933 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:05:48,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:05:48,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:05:48,967 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:05:48,967 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:05:48,968 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:05:48,968 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:05:48,968 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:05:48,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:05:48,969 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:05:48,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:05:48,969 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:05:48,970 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:05:48,970 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:05:48,970 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:05:48,970 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:05:48,971 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:05:48,971 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:05:48,971 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:05:48,972 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:05:48,975 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:05:48,975 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:05:48,975 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:05:48,976 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:05:48,976 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:05:48,976 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:05:48,976 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:05:48,976 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:05:48,977 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:05:48,977 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:05:48,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:05:48,977 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:05:48,977 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:05:48,978 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:05:48,978 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:05:48,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:05:48,978 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:05:48,979 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:05:48,979 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:05:48,979 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:05:48,979 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74a086edb560572752b8cbc391425d974c2cbbd7d3553767e0707a5dc02a4897 [2024-11-10 10:05:49,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:05:49,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:05:49,201 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:05:49,202 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:05:49,203 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:05:49,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-5.i [2024-11-10 10:05:50,402 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:05:50,627 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:05:50,629 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-5.i [2024-11-10 10:05:50,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11a218ee1/7f679415fd9748069fdfe0ef50e4026c/FLAGf3a99b186 [2024-11-10 10:05:50,986 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11a218ee1/7f679415fd9748069fdfe0ef50e4026c [2024-11-10 10:05:50,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:05:50,989 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:05:50,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:05:50,992 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:05:50,996 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:05:50,997 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:05:50" (1/1) ... [2024-11-10 10:05:50,997 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64ae549e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:50, skipping insertion in model container [2024-11-10 10:05:50,997 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:05:50" (1/1) ... [2024-11-10 10:05:51,031 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:05:51,298 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/pthread/fib_safe-5.i[30241,30254] [2024-11-10 10:05:51,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:05:51,329 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:05:51,358 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/pthread/fib_safe-5.i[30241,30254] [2024-11-10 10:05:51,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:05:51,392 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:05:51,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51 WrapperNode [2024-11-10 10:05:51,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:05:51,393 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:05:51,393 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:05:51,394 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:05:51,399 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,410 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,430 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2024-11-10 10:05:51,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:05:51,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:05:51,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:05:51,431 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:05:51,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,441 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,458 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]. [2024-11-10 10:05:51,458 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,458 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,462 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,462 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,463 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,466 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:05:51,467 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:05:51,467 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:05:51,467 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:05:51,468 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (1/1) ... [2024-11-10 10:05:51,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:05:51,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:05:51,496 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) [2024-11-10 10:05:51,501 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 [2024-11-10 10:05:51,544 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-11-10 10:05:51,545 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-11-10 10:05:51,545 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-11-10 10:05:51,545 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-11-10 10:05:51,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 10:05:51,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:05:51,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:05:51,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 10:05:51,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:05:51,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:05:51,548 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:05:51,681 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:05:51,682 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:05:51,801 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:05:51,801 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:05:51,895 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:05:51,895 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:05:51,895 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:05:51 BoogieIcfgContainer [2024-11-10 10:05:51,895 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:05:51,897 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:05:51,897 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:05:51,900 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:05:51,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:05:50" (1/3) ... [2024-11-10 10:05:51,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c84fff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:05:51, skipping insertion in model container [2024-11-10 10:05:51,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:05:51" (2/3) ... [2024-11-10 10:05:51,901 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c84fff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:05:51, skipping insertion in model container [2024-11-10 10:05:51,901 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:05:51" (3/3) ... [2024-11-10 10:05:51,902 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-5.i [2024-11-10 10:05:51,915 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:05:51,916 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:05:51,916 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:05:51,948 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-11-10 10:05:51,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 38 transitions, 84 flow [2024-11-10 10:05:52,018 INFO L124 PetriNetUnfolderBase]: 7/36 cut-off events. [2024-11-10 10:05:52,019 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:05:52,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 36 events. 7/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 55 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-11-10 10:05:52,021 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 38 transitions, 84 flow [2024-11-10 10:05:52,023 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 36 transitions, 78 flow [2024-11-10 10:05:52,033 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:05:52,039 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;@1d11bab3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:05:52,039 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-10 10:05:52,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:05:52,048 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2024-11-10 10:05:52,048 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:05:52,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:52,049 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:52,049 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:52,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:52,055 INFO L85 PathProgramCache]: Analyzing trace with hash -850951809, now seen corresponding path program 1 times [2024-11-10 10:05:52,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:52,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906436011] [2024-11-10 10:05:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:52,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:52,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:52,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906436011] [2024-11-10 10:05:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906436011] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:05:52,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:05:52,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:05:52,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840189312] [2024-11-10 10:05:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:05:52,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:05:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:52,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:05:52,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:05:52,250 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 38 [2024-11-10 10:05:52,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 78 flow. Second operand has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2024-11-10 10:05:52,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:52,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 38 [2024-11-10 10:05:52,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:05:52,359 INFO L124 PetriNetUnfolderBase]: 233/436 cut-off events. [2024-11-10 10:05:52,360 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:05:52,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 436 events. 233/436 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2024 event pairs, 159 based on Foata normal form. 90/493 useless extension candidates. Maximal degree in co-relation 791. Up to 358 conditions per place. [2024-11-10 10:05:52,366 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 21 selfloop transitions, 0 changer transitions 1/32 dead transitions. [2024-11-10 10:05:52,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 114 flow [2024-11-10 10:05:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:05:52,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:05:52,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-10 10:05:52,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-10 10:05:52,379 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 78 flow. Second operand 2 states and 50 transitions. [2024-11-10 10:05:52,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 114 flow [2024-11-10 10:05:52,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 112 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 10:05:52,382 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 66 flow [2024-11-10 10:05:52,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2024-11-10 10:05:52,386 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -1 predicate places. [2024-11-10 10:05:52,387 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 66 flow [2024-11-10 10:05:52,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 18.5) internal successors, (37), 2 states have internal predecessors, (37), 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) [2024-11-10 10:05:52,387 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:52,388 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:52,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:05:52,389 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:52,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1924301250, now seen corresponding path program 1 times [2024-11-10 10:05:52,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:52,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570342079] [2024-11-10 10:05:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:52,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:52,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:52,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570342079] [2024-11-10 10:05:52,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570342079] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:05:52,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:05:52,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:05:52,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099463462] [2024-11-10 10:05:52,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:05:52,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:05:52,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:52,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:05:52,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:05:52,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:05:52,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-11-10 10:05:52,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:52,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:05:52,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:05:52,600 INFO L124 PetriNetUnfolderBase]: 265/484 cut-off events. [2024-11-10 10:05:52,601 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 10:05:52,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 902 conditions, 484 events. 265/484 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2238 event pairs, 39 based on Foata normal form. 0/451 useless extension candidates. Maximal degree in co-relation 899. Up to 305 conditions per place. [2024-11-10 10:05:52,606 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 29 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-10 10:05:52,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 40 transitions, 146 flow [2024-11-10 10:05:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:05:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:05:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-10 10:05:52,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5701754385964912 [2024-11-10 10:05:52,609 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 66 flow. Second operand 3 states and 65 transitions. [2024-11-10 10:05:52,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 40 transitions, 146 flow [2024-11-10 10:05:52,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 146 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:05:52,611 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 78 flow [2024-11-10 10:05:52,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-11-10 10:05:52,611 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-11-10 10:05:52,611 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 78 flow [2024-11-10 10:05:52,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-11-10 10:05:52,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:52,612 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:52,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:05:52,612 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:52,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:52,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1884553586, now seen corresponding path program 1 times [2024-11-10 10:05:52,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:52,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327303698] [2024-11-10 10:05:52,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:52,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:52,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:52,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:52,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327303698] [2024-11-10 10:05:52,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327303698] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:05:52,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870686074] [2024-11-10 10:05:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:52,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:52,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:05:52,684 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) [2024-11-10 10:05:52,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 10:05:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:52,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-10 10:05:52,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:05:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:52,792 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:05:52,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:52,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870686074] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:05:52,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:05:52,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-10 10:05:52,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873857849] [2024-11-10 10:05:52,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:05:52,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 10:05:52,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:52,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 10:05:52,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-10 10:05:52,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:05:52,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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) [2024-11-10 10:05:52,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:52,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:05:52,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:05:52,970 INFO L124 PetriNetUnfolderBase]: 361/676 cut-off events. [2024-11-10 10:05:52,970 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-11-10 10:05:52,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1353 conditions, 676 events. 361/676 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3233 event pairs, 39 based on Foata normal form. 0/643 useless extension candidates. Maximal degree in co-relation 1348. Up to 305 conditions per place. [2024-11-10 10:05:52,974 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 53 selfloop transitions, 5 changer transitions 0/67 dead transitions. [2024-11-10 10:05:52,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 67 transitions, 270 flow [2024-11-10 10:05:52,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 10:05:52,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 10:05:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-10 10:05:52,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5570175438596491 [2024-11-10 10:05:52,977 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 78 flow. Second operand 6 states and 127 transitions. [2024-11-10 10:05:52,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 67 transitions, 270 flow [2024-11-10 10:05:52,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 67 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:05:52,980 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 112 flow [2024-11-10 10:05:52,980 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2024-11-10 10:05:52,981 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2024-11-10 10:05:52,982 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 112 flow [2024-11-10 10:05:52,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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) [2024-11-10 10:05:52,982 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:52,982 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:52,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 10:05:53,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:53,187 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:53,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash 291669886, now seen corresponding path program 2 times [2024-11-10 10:05:53,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:53,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097025053] [2024-11-10 10:05:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:53,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:53,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:53,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097025053] [2024-11-10 10:05:53,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097025053] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:05:53,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067622413] [2024-11-10 10:05:53,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 10:05:53,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:53,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:05:53,317 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) [2024-11-10 10:05:53,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 10:05:53,382 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 10:05:53,382 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:05:53,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 10:05:53,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:05:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:53,425 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:05:53,490 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:53,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067622413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:05:53,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:05:53,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-10 10:05:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500225954] [2024-11-10 10:05:53,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:05:53,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-10 10:05:53,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-10 10:05:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-10 10:05:53,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:05:53,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 112 flow. Second operand has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 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) [2024-11-10 10:05:53,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:53,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:05:53,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:05:53,717 INFO L124 PetriNetUnfolderBase]: 553/1060 cut-off events. [2024-11-10 10:05:53,717 INFO L125 PetriNetUnfolderBase]: For 1792/1792 co-relation queries the response was YES. [2024-11-10 10:05:53,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2381 conditions, 1060 events. 553/1060 cut-off events. For 1792/1792 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5266 event pairs, 39 based on Foata normal form. 96/1139 useless extension candidates. Maximal degree in co-relation 2373. Up to 305 conditions per place. [2024-11-10 10:05:53,723 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 101 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2024-11-10 10:05:53,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 121 transitions, 532 flow [2024-11-10 10:05:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-10 10:05:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-10 10:05:53,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-11-10 10:05:53,751 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5482456140350878 [2024-11-10 10:05:53,751 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 112 flow. Second operand 12 states and 250 transitions. [2024-11-10 10:05:53,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 121 transitions, 532 flow [2024-11-10 10:05:53,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 121 transitions, 524 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 10:05:53,758 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 188 flow [2024-11-10 10:05:53,758 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=188, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2024-11-10 10:05:53,759 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 24 predicate places. [2024-11-10 10:05:53,760 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 188 flow [2024-11-10 10:05:53,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 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) [2024-11-10 10:05:53,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:53,760 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:53,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 10:05:53,961 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,SelfDestructingSolverStorable3 [2024-11-10 10:05:53,961 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:53,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:53,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1326760610, now seen corresponding path program 3 times [2024-11-10 10:05:53,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:53,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418472009] [2024-11-10 10:05:53,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:53,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:54,179 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:54,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:54,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418472009] [2024-11-10 10:05:54,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418472009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:05:54,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018523067] [2024-11-10 10:05:54,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 10:05:54,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:54,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:05:54,182 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) [2024-11-10 10:05:54,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 10:05:54,247 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-10 10:05:54,247 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:05:54,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-10 10:05:54,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:05:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:54,297 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:05:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:54,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018523067] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:05:54,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:05:54,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-11-10 10:05:54,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127401345] [2024-11-10 10:05:54,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:05:54,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 10:05:54,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:54,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 10:05:54,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2024-11-10 10:05:54,408 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:05:54,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 188 flow. Second operand has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 15 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:54,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:54,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:05:54,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:05:54,629 INFO L124 PetriNetUnfolderBase]: 617/1188 cut-off events. [2024-11-10 10:05:54,629 INFO L125 PetriNetUnfolderBase]: For 4208/4208 co-relation queries the response was YES. [2024-11-10 10:05:54,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3028 conditions, 1188 events. 617/1188 cut-off events. For 4208/4208 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 5943 event pairs, 39 based on Foata normal form. 32/1203 useless extension candidates. Maximal degree in co-relation 3013. Up to 305 conditions per place. [2024-11-10 10:05:54,637 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 117 selfloop transitions, 13 changer transitions 0/139 dead transitions. [2024-11-10 10:05:54,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 139 transitions, 656 flow [2024-11-10 10:05:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-10 10:05:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-10 10:05:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 286 transitions. [2024-11-10 10:05:54,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5375939849624061 [2024-11-10 10:05:54,640 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 188 flow. Second operand 14 states and 286 transitions. [2024-11-10 10:05:54,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 139 transitions, 656 flow [2024-11-10 10:05:54,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 139 transitions, 616 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-10 10:05:54,650 INFO L231 Difference]: Finished difference. Result has 70 places, 43 transitions, 200 flow [2024-11-10 10:05:54,650 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=200, PETRI_PLACES=70, PETRI_TRANSITIONS=43} [2024-11-10 10:05:54,651 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2024-11-10 10:05:54,652 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 43 transitions, 200 flow [2024-11-10 10:05:54,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.866666666666667) internal successors, (193), 15 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:05:54,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:05:54,652 INFO L204 CegarLoopForPetriNet]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:05:54,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 10:05:54,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:54,857 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:05:54,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:05:54,857 INFO L85 PathProgramCache]: Analyzing trace with hash 114612734, now seen corresponding path program 4 times [2024-11-10 10:05:54,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:05:54,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522311309] [2024-11-10 10:05:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:05:54,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:05:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:05:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:55,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:05:55,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522311309] [2024-11-10 10:05:55,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522311309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:05:55,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524637843] [2024-11-10 10:05:55,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 10:05:55,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:05:55,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:05:55,632 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) [2024-11-10 10:05:55,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 10:05:55,692 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 10:05:55,692 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 10:05:55,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-10 10:05:55,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:05:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 110 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:56,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:05:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:05:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524637843] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:05:57,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:05:57,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 53 [2024-11-10 10:05:57,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992468575] [2024-11-10 10:05:57,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:05:57,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-10 10:05:57,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:05:57,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-10 10:05:57,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=2446, Unknown=0, NotChecked=0, Total=2862 [2024-11-10 10:05:57,072 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:05:57,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 43 transitions, 200 flow. Second operand has 54 states, 54 states have (on average 12.314814814814815) internal successors, (665), 54 states have internal predecessors, (665), 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) [2024-11-10 10:05:57,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:05:57,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:05:57,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:06:09,047 INFO L124 PetriNetUnfolderBase]: 12499/24565 cut-off events. [2024-11-10 10:06:09,048 INFO L125 PetriNetUnfolderBase]: For 34179/34350 co-relation queries the response was YES. [2024-11-10 10:06:09,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57396 conditions, 24565 events. 12499/24565 cut-off events. For 34179/34350 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 208777 event pairs, 70 based on Foata normal form. 0/22968 useless extension candidates. Maximal degree in co-relation 57379. Up to 4083 conditions per place. [2024-11-10 10:06:09,180 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 505 selfloop transitions, 455 changer transitions 613/1582 dead transitions. [2024-11-10 10:06:09,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 1582 transitions, 8713 flow [2024-11-10 10:06:09,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2024-11-10 10:06:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2024-11-10 10:06:09,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 2993 transitions. [2024-11-10 10:06:09,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5081494057724958 [2024-11-10 10:06:09,188 INFO L175 Difference]: Start difference. First operand has 70 places, 43 transitions, 200 flow. Second operand 155 states and 2993 transitions. [2024-11-10 10:06:09,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 1582 transitions, 8713 flow [2024-11-10 10:06:09,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1582 transitions, 7835 flow, removed 150 selfloop flow, removed 11 redundant places. [2024-11-10 10:06:09,274 INFO L231 Difference]: Finished difference. Result has 275 places, 544 transitions, 3828 flow [2024-11-10 10:06:09,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=155, PETRI_FLOW=3828, PETRI_PLACES=275, PETRI_TRANSITIONS=544} [2024-11-10 10:06:09,276 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 239 predicate places. [2024-11-10 10:06:09,277 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 544 transitions, 3828 flow [2024-11-10 10:06:09,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 12.314814814814815) internal successors, (665), 54 states have internal predecessors, (665), 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) [2024-11-10 10:06:09,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:06:09,278 INFO L204 CegarLoopForPetriNet]: trace histogram [13, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:06:09,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 10:06:09,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:09,486 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-10 10:06:09,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:06:09,486 INFO L85 PathProgramCache]: Analyzing trace with hash -118222291, now seen corresponding path program 1 times [2024-11-10 10:06:09,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:06:09,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929437377] [2024-11-10 10:06:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:09,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:06:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:10,329 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:10,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:06:10,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929437377] [2024-11-10 10:06:10,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929437377] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 10:06:10,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567154683] [2024-11-10 10:06:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:06:10,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 10:06:10,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:06:10,331 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) [2024-11-10 10:06:10,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 10:06:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:06:10,392 INFO L255 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-10 10:06:10,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 10:06:11,131 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 100 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:11,132 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 10:06:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:06:11,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567154683] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 10:06:11,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 10:06:11,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2024-11-10 10:06:11,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434823744] [2024-11-10 10:06:11,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 10:06:11,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-10 10:06:11,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:06:11,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-10 10:06:11,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=3217, Unknown=0, NotChecked=0, Total=3660 [2024-11-10 10:06:11,950 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-10 10:06:11,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 544 transitions, 3828 flow. Second operand has 61 states, 61 states have (on average 12.360655737704919) internal successors, (754), 61 states have internal predecessors, (754), 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) [2024-11-10 10:06:11,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:06:11,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-10 10:06:11,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand