./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/fib_safe-10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/fib_safe-10.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:12:31,349 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:12:31,394 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:12:31,396 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:12:31,397 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:12:31,409 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:12:31,409 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:12:31,410 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:12:31,410 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:12:31,410 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:12:31,410 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:12:31,410 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:12:31,410 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:12:31,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:12:31,410 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:12:31,411 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:12:31,411 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:12:31,412 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:12:31,412 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:12:31,412 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:12:31,412 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:12:31,412 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:12:31,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:12:31,412 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:12:31,412 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:12:31,412 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:12:31,412 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:12:31,413 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:12:31,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:12:31,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:12:31,413 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:12:31,413 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:12:31,413 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:12:31,413 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> 4d0c5b9355e30d5caa4f24695b56ab4fa8d9d282078ca8b4e24a8f9b8920e450 [2025-02-06 04:12:31,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:12:31,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:12:31,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:12:31,616 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:12:31,618 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:12:31,619 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_safe-10.i [2025-02-06 04:12:32,742 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c22bfa2e4/ef9575664ed54d8caee7acc65c3ec4c1/FLAG7a5f3a4a7 [2025-02-06 04:12:33,059 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:12:33,060 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-10.i [2025-02-06 04:12:33,074 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c22bfa2e4/ef9575664ed54d8caee7acc65c3ec4c1/FLAG7a5f3a4a7 [2025-02-06 04:12:33,311 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c22bfa2e4/ef9575664ed54d8caee7acc65c3ec4c1 [2025-02-06 04:12:33,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:12:33,315 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:12:33,316 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:12:33,316 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:12:33,324 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:12:33,325 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428563 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33, skipping insertion in model container [2025-02-06 04:12:33,325 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,353 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:12:33,562 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-10.i[30241,30254] [2025-02-06 04:12:33,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:12:33,591 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:12:33,623 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread/fib_safe-10.i[30241,30254] [2025-02-06 04:12:33,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:12:33,654 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:12:33,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33 WrapperNode [2025-02-06 04:12:33,655 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:12:33,656 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:12:33,656 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:12:33,657 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:12:33,662 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,688 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-02-06 04:12:33,689 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:12:33,690 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:12:33,690 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:12:33,690 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:12:33,695 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,695 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,698 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,712 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]. [2025-02-06 04:12:33,712 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,713 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,715 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,717 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,717 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,718 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:12:33,719 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:12:33,719 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:12:33,719 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:12:33,720 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (1/1) ... [2025-02-06 04:12:33,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:12:33,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:12:33,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 04:12:33,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 04:12:33,766 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-02-06 04:12:33,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-02-06 04:12:33,767 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-02-06 04:12:33,767 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-02-06 04:12:33,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 04:12:33,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:12:33,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:12:33,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 04:12:33,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:12:33,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:12:33,768 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 04:12:33,842 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:12:33,843 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:12:33,947 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:12:33,947 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:12:34,007 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:12:34,007 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:12:34,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:12:34 BoogieIcfgContainer [2025-02-06 04:12:34,008 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:12:34,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:12:34,009 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:12:34,013 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:12:34,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:12:33" (1/3) ... [2025-02-06 04:12:34,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2bd16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:12:34, skipping insertion in model container [2025-02-06 04:12:34,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:12:33" (2/3) ... [2025-02-06 04:12:34,014 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2bd16f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:12:34, skipping insertion in model container [2025-02-06 04:12:34,014 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:12:34" (3/3) ... [2025-02-06 04:12:34,015 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-10.i [2025-02-06 04:12:34,026 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:12:34,027 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-10.i that has 3 procedures, 26 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2025-02-06 04:12:34,028 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:12:34,056 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:12:34,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2025-02-06 04:12:34,099 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2025-02-06 04:12:34,101 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:12:34,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 31 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2025-02-06 04:12:34,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2025-02-06 04:12:34,105 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2025-02-06 04:12:34,110 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:12:34,118 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;@1a87e552, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:12:34,118 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:12:34,125 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:12:34,125 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2025-02-06 04:12:34,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:12:34,125 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:34,126 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:12:34,126 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:12:34,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:34,130 INFO L85 PathProgramCache]: Analyzing trace with hash -526820503, now seen corresponding path program 1 times [2025-02-06 04:12:34,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:34,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069825694] [2025-02-06 04:12:34,137 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:12:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:34,193 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 04:12:34,207 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 04:12:34,207 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:12:34,207 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:34,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:34,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069825694] [2025-02-06 04:12:34,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069825694] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:12:34,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:12:34,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:12:34,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631722488] [2025-02-06 04:12:34,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:12:34,291 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 04:12:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:34,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 04:12:34,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 04:12:34,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-02-06 04:12:34,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-02-06 04:12:34,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:34,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-02-06 04:12:34,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:12:34,420 INFO L124 PetriNetUnfolderBase]: 233/411 cut-off events. [2025-02-06 04:12:34,420 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 04:12:34,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 782 conditions, 411 events. 233/411 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1590 event pairs, 39 based on Foata normal form. 16/390 useless extension candidates. Maximal degree in co-relation 766. Up to 257 conditions per place. [2025-02-06 04:12:34,424 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 27 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2025-02-06 04:12:34,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 35 transitions, 136 flow [2025-02-06 04:12:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 04:12:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 04:12:34,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 53 transitions. [2025-02-06 04:12:34,434 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6091954022988506 [2025-02-06 04:12:34,435 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 60 flow. Second operand 3 states and 53 transitions. [2025-02-06 04:12:34,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 35 transitions, 136 flow [2025-02-06 04:12:34,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 04:12:34,440 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 66 flow [2025-02-06 04:12:34,442 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2025-02-06 04:12:34,444 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2025-02-06 04:12:34,445 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 66 flow [2025-02-06 04:12:34,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-02-06 04:12:34,445 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:34,445 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:12:34,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 04:12:34,445 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:12:34,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 856229523, now seen corresponding path program 1 times [2025-02-06 04:12:34,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:34,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048846276] [2025-02-06 04:12:34,446 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:12:34,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:34,455 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:12:34,462 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:12:34,462 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:12:34,462 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:34,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:34,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:34,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048846276] [2025-02-06 04:12:34,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048846276] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:12:34,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914207255] [2025-02-06 04:12:34,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:12:34,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:34,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:12:34,522 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:12:34,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 04:12:34,575 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-02-06 04:12:34,592 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:12:34,592 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:12:34,592 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:34,594 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-06 04:12:34,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:12:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:34,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:12:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:34,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914207255] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:12:34,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:12:34,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-02-06 04:12:34,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888777842] [2025-02-06 04:12:34,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:12:34,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 04:12:34,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:34,637 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 04:12:34,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:12:34,637 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-02-06 04:12:34,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2025-02-06 04:12:34,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:34,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-02-06 04:12:34,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:12:34,755 INFO L124 PetriNetUnfolderBase]: 297/507 cut-off events. [2025-02-06 04:12:34,755 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 04:12:34,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1087 conditions, 507 events. 297/507 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1882 event pairs, 39 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 1070. Up to 209 conditions per place. [2025-02-06 04:12:34,759 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-02-06 04:12:34,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 61 transitions, 254 flow [2025-02-06 04:12:34,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:12:34,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:12:34,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2025-02-06 04:12:34,761 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5804597701149425 [2025-02-06 04:12:34,761 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 66 flow. Second operand 6 states and 101 transitions. [2025-02-06 04:12:34,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 61 transitions, 254 flow [2025-02-06 04:12:34,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 61 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:12:34,762 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 100 flow [2025-02-06 04:12:34,762 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2025-02-06 04:12:34,763 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2025-02-06 04:12:34,763 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 100 flow [2025-02-06 04:12:34,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2025-02-06 04:12:34,763 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:34,764 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:12:34,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 04:12:34,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:34,965 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:12:34,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:34,966 INFO L85 PathProgramCache]: Analyzing trace with hash -725625367, now seen corresponding path program 2 times [2025-02-06 04:12:34,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:34,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983931183] [2025-02-06 04:12:34,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:12:34,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:34,975 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:12:34,996 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:12:34,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:12:34,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:35,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983931183] [2025-02-06 04:12:35,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983931183] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:12:35,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351171736] [2025-02-06 04:12:35,074 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:12:35,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:35,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:12:35,077 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:12:35,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 04:12:35,117 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-06 04:12:35,133 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-06 04:12:35,133 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:12:35,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:35,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 04:12:35,136 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:12:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:35,150 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:12:35,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:35,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351171736] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:12:35,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:12:35,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-02-06 04:12:35,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224983343] [2025-02-06 04:12:35,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:12:35,237 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 04:12:35,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:35,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 04:12:35,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-02-06 04:12:35,238 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-02-06 04:12:35,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 100 flow. Second operand has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-02-06 04:12:35,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:35,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-02-06 04:12:35,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:12:35,416 INFO L124 PetriNetUnfolderBase]: 489/795 cut-off events. [2025-02-06 04:12:35,416 INFO L125 PetriNetUnfolderBase]: For 364/364 co-relation queries the response was YES. [2025-02-06 04:12:35,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2019 conditions, 795 events. 489/795 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2899 event pairs, 39 based on Foata normal form. 96/870 useless extension candidates. Maximal degree in co-relation 1998. Up to 209 conditions per place. [2025-02-06 04:12:35,421 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 99 selfloop transitions, 11 changer transitions 0/115 dead transitions. [2025-02-06 04:12:35,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 115 transitions, 516 flow [2025-02-06 04:12:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 04:12:35,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-02-06 04:12:35,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 200 transitions. [2025-02-06 04:12:35,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5747126436781609 [2025-02-06 04:12:35,423 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 100 flow. Second operand 12 states and 200 transitions. [2025-02-06 04:12:35,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 115 transitions, 516 flow [2025-02-06 04:12:35,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 115 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-02-06 04:12:35,427 INFO L231 Difference]: Finished difference. Result has 53 places, 35 transitions, 170 flow [2025-02-06 04:12:35,427 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=170, PETRI_PLACES=53, PETRI_TRANSITIONS=35} [2025-02-06 04:12:35,428 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 23 predicate places. [2025-02-06 04:12:35,428 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 35 transitions, 170 flow [2025-02-06 04:12:35,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.76923076923077) internal successors, (114), 13 states have internal predecessors, (114), 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) [2025-02-06 04:12:35,428 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:35,428 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:12:35,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 04:12:35,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:35,629 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:12:35,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1644087895, now seen corresponding path program 3 times [2025-02-06 04:12:35,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:35,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364298974] [2025-02-06 04:12:35,630 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:12:35,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:35,638 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-02-06 04:12:35,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:12:35,660 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 04:12:35,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:35,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:35,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364298974] [2025-02-06 04:12:35,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364298974] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:12:35,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577442287] [2025-02-06 04:12:35,838 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 04:12:35,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:35,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:12:35,841 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:12:35,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 04:12:35,904 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 6 equivalence classes. [2025-02-06 04:12:35,933 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 23 of 23 statements. [2025-02-06 04:12:35,933 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 04:12:35,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:35,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 04:12:35,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:12:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:35,971 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:12:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:36,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577442287] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:12:36,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:12:36,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-02-06 04:12:36,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870489586] [2025-02-06 04:12:36,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:12:36,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 04:12:36,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:36,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 04:12:36,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-02-06 04:12:36,187 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 29 [2025-02-06 04:12:36,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 35 transitions, 170 flow. Second operand has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-02-06 04:12:36,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:36,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 29 [2025-02-06 04:12:36,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:12:36,546 INFO L124 PetriNetUnfolderBase]: 873/1371 cut-off events. [2025-02-06 04:12:36,547 INFO L125 PetriNetUnfolderBase]: For 7468/7468 co-relation queries the response was YES. [2025-02-06 04:12:36,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4026 conditions, 1371 events. 873/1371 cut-off events. For 7468/7468 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4997 event pairs, 39 based on Foata normal form. 192/1542 useless extension candidates. Maximal degree in co-relation 3998. Up to 337 conditions per place. [2025-02-06 04:12:36,555 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 195 selfloop transitions, 23 changer transitions 0/223 dead transitions. [2025-02-06 04:12:36,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 223 transitions, 1054 flow [2025-02-06 04:12:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 04:12:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-02-06 04:12:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 398 transitions. [2025-02-06 04:12:36,558 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5718390804597702 [2025-02-06 04:12:36,558 INFO L175 Difference]: Start difference. First operand has 53 places, 35 transitions, 170 flow. Second operand 24 states and 398 transitions. [2025-02-06 04:12:36,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 223 transitions, 1054 flow [2025-02-06 04:12:36,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 223 transitions, 982 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-02-06 04:12:36,609 INFO L231 Difference]: Finished difference. Result has 83 places, 47 transitions, 290 flow [2025-02-06 04:12:36,609 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=290, PETRI_PLACES=83, PETRI_TRANSITIONS=47} [2025-02-06 04:12:36,610 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 53 predicate places. [2025-02-06 04:12:36,610 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 47 transitions, 290 flow [2025-02-06 04:12:36,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.4) internal successors, (210), 25 states have internal predecessors, (210), 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) [2025-02-06 04:12:36,613 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:12:36,613 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:12:36,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 04:12:36,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:36,818 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:12:36,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:12:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1083933993, now seen corresponding path program 4 times [2025-02-06 04:12:36,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:12:36,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425032846] [2025-02-06 04:12:36,819 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:12:36,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:12:36,830 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-06 04:12:36,886 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-02-06 04:12:36,886 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:12:36,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:38,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:12:38,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425032846] [2025-02-06 04:12:38,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425032846] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:12:38,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151216634] [2025-02-06 04:12:38,467 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 04:12:38,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:12:38,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:12:38,472 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:12:38,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 04:12:38,507 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 35 statements into 2 equivalence classes. [2025-02-06 04:12:38,532 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-02-06 04:12:38,533 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 04:12:38,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:12:38,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-02-06 04:12:38,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:12:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:40,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:12:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:12:41,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151216634] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:12:41,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:12:41,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2025-02-06 04:12:41,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260710404] [2025-02-06 04:12:41,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:12:41,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2025-02-06 04:12:41,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:12:41,848 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2025-02-06 04:12:41,851 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1018, Invalid=6292, Unknown=0, NotChecked=0, Total=7310 [2025-02-06 04:12:41,861 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-02-06 04:12:41,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 47 transitions, 290 flow. Second operand has 86 states, 86 states have (on average 6.186046511627907) internal successors, (532), 86 states have internal predecessors, (532), 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) [2025-02-06 04:12:41,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:12:41,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-02-06 04:12:41,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:13:15,759 INFO L124 PetriNetUnfolderBase]: 31774/51588 cut-off events. [2025-02-06 04:13:15,759 INFO L125 PetriNetUnfolderBase]: For 172023/172023 co-relation queries the response was YES. [2025-02-06 04:13:15,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148055 conditions, 51588 events. 31774/51588 cut-off events. For 172023/172023 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 347507 event pairs, 70 based on Foata normal form. 0/51092 useless extension candidates. Maximal degree in co-relation 148015. Up to 7735 conditions per place. [2025-02-06 04:13:16,092 INFO L140 encePairwiseOnDemand]: 18/29 looper letters, 880 selfloop transitions, 1265 changer transitions 1053/3201 dead transitions. [2025-02-06 04:13:16,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 3201 transitions, 22119 flow [2025-02-06 04:13:16,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2025-02-06 04:13:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2025-02-06 04:13:16,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 3548 transitions. [2025-02-06 04:13:16,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46167859466493166 [2025-02-06 04:13:16,112 INFO L175 Difference]: Start difference. First operand has 83 places, 47 transitions, 290 flow. Second operand 265 states and 3548 transitions. [2025-02-06 04:13:16,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 3201 transitions, 22119 flow [2025-02-06 04:13:16,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 3201 transitions, 17441 flow, removed 1850 selfloop flow, removed 11 redundant places. [2025-02-06 04:13:16,507 INFO L231 Difference]: Finished difference. Result has 438 places, 1398 transitions, 8460 flow [2025-02-06 04:13:16,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=29, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=265, PETRI_FLOW=8460, PETRI_PLACES=438, PETRI_TRANSITIONS=1398} [2025-02-06 04:13:16,508 INFO L279 CegarLoopForPetriNet]: 30 programPoint places, 408 predicate places. [2025-02-06 04:13:16,508 INFO L471 AbstractCegarLoop]: Abstraction has has 438 places, 1398 transitions, 8460 flow [2025-02-06 04:13:16,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 6.186046511627907) internal successors, (532), 86 states have internal predecessors, (532), 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) [2025-02-06 04:13:16,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:13:16,509 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:13:16,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 04:13:16,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:16,713 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:13:16,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:13:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash 790846725, now seen corresponding path program 1 times [2025-02-06 04:13:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:13:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929067430] [2025-02-06 04:13:16,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:13:16,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:13:16,727 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-06 04:13:16,754 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-06 04:13:16,755 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:13:16,755 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:17,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:13:17,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929067430] [2025-02-06 04:13:17,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929067430] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:13:17,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770649970] [2025-02-06 04:13:17,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:13:17,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:13:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:13:17,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 04:13:18,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 04:13:18,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-06 04:13:18,071 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-06 04:13:18,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:13:18,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:13:18,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-02-06 04:13:18,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:13:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 210 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:19,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:13:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:13:20,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770649970] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:13:20,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 04:13:20,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 89 [2025-02-06 04:13:20,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766537231] [2025-02-06 04:13:20,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 04:13:20,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2025-02-06 04:13:20,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:13:20,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2025-02-06 04:13:20,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1093, Invalid=6917, Unknown=0, NotChecked=0, Total=8010 [2025-02-06 04:13:20,704 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2025-02-06 04:13:20,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 1398 transitions, 8460 flow. Second operand has 90 states, 90 states have (on average 6.2444444444444445) internal successors, (562), 90 states have internal predecessors, (562), 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) [2025-02-06 04:13:20,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:13:20,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2025-02-06 04:13:20,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand