./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-theta/exponential-nondet.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-theta/exponential-nondet.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 f87ddde6d61a5d434f69c49dc65eaf95f54327ebb0ef5acca382e4d4744605ae --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 04:46:39,803 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 04:46:39,852 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-06 04:46:39,858 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 04:46:39,858 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 04:46:39,875 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 04:46:39,876 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 04:46:39,876 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 04:46:39,876 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 04:46:39,876 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 04:46:39,877 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 04:46:39,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 04:46:39,877 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 04:46:39,877 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 04:46:39,877 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 04:46:39,877 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 04:46:39,877 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 04:46:39,877 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 04:46:39,877 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 04:46:39,878 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 04:46:39,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:46:39,879 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 04:46:39,879 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 04:46:39,880 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 04:46:39,880 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 -> f87ddde6d61a5d434f69c49dc65eaf95f54327ebb0ef5acca382e4d4744605ae [2025-02-06 04:46:40,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 04:46:40,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 04:46:40,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 04:46:40,133 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 04:46:40,134 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 04:46:40,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-theta/exponential-nondet.i [2025-02-06 04:46:41,300 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6cab90690/4d6744b980294fe39ac145eda0189ba1/FLAG0b1fb0004 [2025-02-06 04:46:41,633 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 04:46:41,634 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/pthread-theta/exponential-nondet.i [2025-02-06 04:46:41,648 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6cab90690/4d6744b980294fe39ac145eda0189ba1/FLAG0b1fb0004 [2025-02-06 04:46:41,662 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/6cab90690/4d6744b980294fe39ac145eda0189ba1 [2025-02-06 04:46:41,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 04:46:41,665 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 04:46:41,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 04:46:41,668 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 04:46:41,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 04:46:41,672 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:41,673 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@311f5164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41, skipping insertion in model container [2025-02-06 04:46:41,673 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:41,701 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 04:46:41,890 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-theta/exponential-nondet.i[33030,33043] [2025-02-06 04:46:41,899 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:46:41,905 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 04:46:41,943 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-theta/exponential-nondet.i[33030,33043] [2025-02-06 04:46:41,947 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 04:46:41,975 INFO L204 MainTranslator]: Completed translation [2025-02-06 04:46:41,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41 WrapperNode [2025-02-06 04:46:41,975 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 04:46:41,976 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 04:46:41,976 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 04:46:41,976 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 04:46:41,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:41,995 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,013 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2025-02-06 04:46:42,013 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 04:46:42,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 04:46:42,014 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 04:46:42,014 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 04:46:42,020 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,021 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,022 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,028 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 04:46:42,028 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,029 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,031 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,031 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,032 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,032 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 04:46:42,034 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 04:46:42,034 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 04:46:42,034 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 04:46:42,038 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (1/1) ... [2025-02-06 04:46:42,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 04:46:42,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:42,070 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 04:46:42,083 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 04:46:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 04:46:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-02-06 04:46:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-02-06 04:46:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-02-06 04:46:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-02-06 04:46:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 04:46:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 04:46:42,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 04:46:42,099 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 04:46:42,201 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 04:46:42,203 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 04:46:42,303 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 04:46:42,303 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 04:46:42,386 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 04:46:42,386 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 04:46:42,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:46:42 BoogieIcfgContainer [2025-02-06 04:46:42,387 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 04:46:42,389 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 04:46:42,389 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 04:46:42,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 04:46:42,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 04:46:41" (1/3) ... [2025-02-06 04:46:42,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166571e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:46:42, skipping insertion in model container [2025-02-06 04:46:42,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 04:46:41" (2/3) ... [2025-02-06 04:46:42,393 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166571e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 04:46:42, skipping insertion in model container [2025-02-06 04:46:42,393 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 04:46:42" (3/3) ... [2025-02-06 04:46:42,394 INFO L128 eAbstractionObserver]: Analyzing ICFG exponential-nondet.i [2025-02-06 04:46:42,407 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 04:46:42,408 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG exponential-nondet.i that has 3 procedures, 20 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-06 04:46:42,408 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 04:46:42,450 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:46:42,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 26 places, 22 transitions, 52 flow [2025-02-06 04:46:42,501 INFO L124 PetriNetUnfolderBase]: 4/30 cut-off events. [2025-02-06 04:46:42,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:46:42,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37 conditions, 30 events. 4/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 20. Up to 4 conditions per place. [2025-02-06 04:46:42,506 INFO L82 GeneralOperation]: Start removeDead. Operand has 26 places, 22 transitions, 52 flow [2025-02-06 04:46:42,511 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 23 places, 18 transitions, 43 flow [2025-02-06 04:46:42,516 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:46:42,532 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;@322b1fc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:46:42,533 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:46:42,537 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:46:42,539 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2025-02-06 04:46:42,540 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:46:42,540 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:42,541 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 04:46:42,542 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 04:46:42,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash 165436139, now seen corresponding path program 1 times [2025-02-06 04:46:42,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:42,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735657696] [2025-02-06 04:46:42,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:42,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:42,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 04:46:42,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 04:46:42,653 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:42,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:46:42,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794456358] [2025-02-06 04:46:42,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:42,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:42,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:42,663 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 04:46:42,664 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 04:46:42,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 04:46:42,709 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 04:46:42,709 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:42,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:42,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 04:46:42,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:42,759 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 04:46:42,759 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:46:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:42,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735657696] [2025-02-06 04:46:42,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:46:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794456358] [2025-02-06 04:46:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794456358] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:42,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:46:42,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:46:42,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939072480] [2025-02-06 04:46:42,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:42,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:46:42,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:42,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:46:42,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:46:42,793 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 22 [2025-02-06 04:46:42,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 43 flow. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 04:46:42,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:42,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 22 [2025-02-06 04:46:42,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:42,903 INFO L124 PetriNetUnfolderBase]: 74/151 cut-off events. [2025-02-06 04:46:42,903 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-02-06 04:46:42,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 151 events. 74/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 536 event pairs, 12 based on Foata normal form. 10/139 useless extension candidates. Maximal degree in co-relation 284. Up to 99 conditions per place. [2025-02-06 04:46:42,908 INFO L140 encePairwiseOnDemand]: 18/22 looper letters, 20 selfloop transitions, 2 changer transitions 7/33 dead transitions. [2025-02-06 04:46:42,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 134 flow [2025-02-06 04:46:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:46:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:46:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 61 transitions. [2025-02-06 04:46:42,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2025-02-06 04:46:42,919 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 43 flow. Second operand 5 states and 61 transitions. [2025-02-06 04:46:42,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 134 flow [2025-02-06 04:46:42,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 132 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:46:42,924 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 54 flow [2025-02-06 04:46:42,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=22, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2025-02-06 04:46:42,928 INFO L279 CegarLoopForPetriNet]: 23 programPoint places, 6 predicate places. [2025-02-06 04:46:42,928 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 54 flow [2025-02-06 04:46:42,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 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 04:46:42,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:42,929 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:42,935 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 04:46:43,129 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-06 04:46:43,130 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:46:43,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:43,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1704884478, now seen corresponding path program 1 times [2025-02-06 04:46:43,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:43,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989973842] [2025-02-06 04:46:43,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:43,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:43,139 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 04:46:43,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 04:46:43,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:43,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:46:43,149 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:46:43,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 04:46:43,159 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 04:46:43,159 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:43,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:46:43,169 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:46:43,169 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:46:43,170 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-02-06 04:46:43,171 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-02-06 04:46:43,171 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-02-06 04:46:43,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 04:46:43,171 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-02-06 04:46:43,173 WARN L246 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 04:46:43,173 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-02-06 04:46:43,187 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:46:43,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 30 transitions, 80 flow [2025-02-06 04:46:43,199 INFO L124 PetriNetUnfolderBase]: 6/49 cut-off events. [2025-02-06 04:46:43,200 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 04:46:43,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64 conditions, 49 events. 6/49 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 92 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 43. Up to 6 conditions per place. [2025-02-06 04:46:43,200 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 30 transitions, 80 flow [2025-02-06 04:46:43,200 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 26 transitions, 70 flow [2025-02-06 04:46:43,201 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:46:43,201 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;@322b1fc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:46:43,202 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:46:43,203 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:46:43,203 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2025-02-06 04:46:43,203 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:46:43,203 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:43,204 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 04:46:43,204 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 04:46:43,204 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:43,204 INFO L85 PathProgramCache]: Analyzing trace with hash 194065289, now seen corresponding path program 1 times [2025-02-06 04:46:43,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:43,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190866034] [2025-02-06 04:46:43,204 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:43,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:43,214 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 04:46:43,241 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 04:46:43,241 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:43,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:46:43,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741868735] [2025-02-06 04:46:43,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:43,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:43,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:43,245 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 04:46:43,247 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 04:46:43,281 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 04:46:43,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 04:46:43,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:43,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:43,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 04:46:43,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:43,300 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 04:46:43,301 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:46:43,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:43,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190866034] [2025-02-06 04:46:43,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:46:43,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741868735] [2025-02-06 04:46:43,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741868735] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:43,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:46:43,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:46:43,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692921953] [2025-02-06 04:46:43,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:43,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:46:43,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:43,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:46:43,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:46:43,307 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-02-06 04:46:43,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 26 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 04:46:43,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:43,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-02-06 04:46:43,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:43,526 INFO L124 PetriNetUnfolderBase]: 1571/2332 cut-off events. [2025-02-06 04:46:43,527 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2025-02-06 04:46:43,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4695 conditions, 2332 events. 1571/2332 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11601 event pairs, 304 based on Foata normal form. 91/2235 useless extension candidates. Maximal degree in co-relation 2760. Up to 1877 conditions per place. [2025-02-06 04:46:43,542 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 31 selfloop transitions, 3 changer transitions 15/55 dead transitions. [2025-02-06 04:46:43,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 239 flow [2025-02-06 04:46:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:46:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:46:43,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2025-02-06 04:46:43,544 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2025-02-06 04:46:43,544 INFO L175 Difference]: Start difference. First operand has 35 places, 26 transitions, 70 flow. Second operand 5 states and 91 transitions. [2025-02-06 04:46:43,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 239 flow [2025-02-06 04:46:43,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 55 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 04:46:43,546 INFO L231 Difference]: Finished difference. Result has 41 places, 28 transitions, 96 flow [2025-02-06 04:46:43,546 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=96, PETRI_PLACES=41, PETRI_TRANSITIONS=28} [2025-02-06 04:46:43,546 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 6 predicate places. [2025-02-06 04:46:43,546 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 28 transitions, 96 flow [2025-02-06 04:46:43,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 04:46:43,546 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:43,546 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:43,554 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 04:46:43,747 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 04:46:43,748 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 04:46:43,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:43,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1498911490, now seen corresponding path program 1 times [2025-02-06 04:46:43,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:43,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587951679] [2025-02-06 04:46:43,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:43,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:43,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 04:46:43,777 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 04:46:43,778 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:43,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:43,890 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 04:46:43,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:43,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587951679] [2025-02-06 04:46:43,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587951679] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:43,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:46:43,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:46:43,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185669594] [2025-02-06 04:46:43,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:43,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:46:43,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:43,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:46:43,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:46:43,892 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2025-02-06 04:46:43,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 28 transitions, 96 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 04:46:43,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:43,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2025-02-06 04:46:43,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:44,090 INFO L124 PetriNetUnfolderBase]: 1514/2267 cut-off events. [2025-02-06 04:46:44,091 INFO L125 PetriNetUnfolderBase]: For 1046/1046 co-relation queries the response was YES. [2025-02-06 04:46:44,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5462 conditions, 2267 events. 1514/2267 cut-off events. For 1046/1046 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 11546 event pairs, 1075 based on Foata normal form. 78/2208 useless extension candidates. Maximal degree in co-relation 5073. Up to 1808 conditions per place. [2025-02-06 04:46:44,105 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 29 selfloop transitions, 4 changer transitions 2/42 dead transitions. [2025-02-06 04:46:44,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 208 flow [2025-02-06 04:46:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:46:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:46:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 77 transitions. [2025-02-06 04:46:44,107 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5133333333333333 [2025-02-06 04:46:44,107 INFO L175 Difference]: Start difference. First operand has 41 places, 28 transitions, 96 flow. Second operand 5 states and 77 transitions. [2025-02-06 04:46:44,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 208 flow [2025-02-06 04:46:44,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 201 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 04:46:44,112 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 113 flow [2025-02-06 04:46:44,112 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2025-02-06 04:46:44,113 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 8 predicate places. [2025-02-06 04:46:44,113 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 113 flow [2025-02-06 04:46:44,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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 04:46:44,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:44,114 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:44,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 04:46:44,114 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 04:46:44,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:44,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1574054828, now seen corresponding path program 1 times [2025-02-06 04:46:44,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:44,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4790110] [2025-02-06 04:46:44,115 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:44,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:44,125 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 04:46:44,148 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 04:46:44,152 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:44,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:46:44,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351082268] [2025-02-06 04:46:44,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:44,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:44,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:44,157 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 04:46:44,160 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 04:46:44,199 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 04:46:44,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 04:46:44,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:44,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:44,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 04:46:44,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:44,263 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 04:46:44,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:44,323 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 04:46:44,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:44,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4790110] [2025-02-06 04:46:44,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:46:44,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351082268] [2025-02-06 04:46:44,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351082268] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:44,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 04:46:44,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2025-02-06 04:46:44,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441208642] [2025-02-06 04:46:44,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:44,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 04:46:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:44,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 04:46:44,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:46:44,329 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 30 [2025-02-06 04:46:44,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 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 04:46:44,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:44,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 30 [2025-02-06 04:46:44,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:44,718 INFO L124 PetriNetUnfolderBase]: 2503/3596 cut-off events. [2025-02-06 04:46:44,719 INFO L125 PetriNetUnfolderBase]: For 2050/2050 co-relation queries the response was YES. [2025-02-06 04:46:44,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9401 conditions, 3596 events. 2503/3596 cut-off events. For 2050/2050 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 17735 event pairs, 182 based on Foata normal form. 192/3782 useless extension candidates. Maximal degree in co-relation 4569. Up to 965 conditions per place. [2025-02-06 04:46:44,732 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 55 selfloop transitions, 16 changer transitions 28/105 dead transitions. [2025-02-06 04:46:44,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 105 transitions, 550 flow [2025-02-06 04:46:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:46:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:46:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2025-02-06 04:46:44,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-02-06 04:46:44,734 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 113 flow. Second operand 10 states and 175 transitions. [2025-02-06 04:46:44,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 105 transitions, 550 flow [2025-02-06 04:46:44,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 105 transitions, 547 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:46:44,738 INFO L231 Difference]: Finished difference. Result has 56 places, 43 transitions, 251 flow [2025-02-06 04:46:44,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=251, PETRI_PLACES=56, PETRI_TRANSITIONS=43} [2025-02-06 04:46:44,739 INFO L279 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2025-02-06 04:46:44,739 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 43 transitions, 251 flow [2025-02-06 04:46:44,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 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 04:46:44,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:44,739 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:44,748 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 04:46:44,939 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:44,940 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:46:44,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:44,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1784636994, now seen corresponding path program 1 times [2025-02-06 04:46:44,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:44,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649269109] [2025-02-06 04:46:44,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:44,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:44,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 04:46:44,949 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 04:46:44,949 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:44,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:46:44,949 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:46:44,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 04:46:44,954 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 04:46:44,954 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:44,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:46:44,957 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:46:44,957 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:46:44,957 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-02-06 04:46:44,957 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-02-06 04:46:44,958 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-02-06 04:46:44,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 04:46:44,958 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2025-02-06 04:46:44,958 WARN L246 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 04:46:44,958 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-02-06 04:46:44,972 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:46:44,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 38 transitions, 112 flow [2025-02-06 04:46:44,976 INFO L124 PetriNetUnfolderBase]: 8/68 cut-off events. [2025-02-06 04:46:44,977 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-02-06 04:46:44,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 68 events. 8/68 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 148 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 70. Up to 8 conditions per place. [2025-02-06 04:46:44,977 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 38 transitions, 112 flow [2025-02-06 04:46:44,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 34 transitions, 101 flow [2025-02-06 04:46:44,978 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:46:44,978 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;@322b1fc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:46:44,978 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:46:44,979 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:46:44,979 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2025-02-06 04:46:44,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:46:44,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:44,979 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 04:46:44,979 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 04:46:44,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:44,980 INFO L85 PathProgramCache]: Analyzing trace with hash 230328879, now seen corresponding path program 1 times [2025-02-06 04:46:44,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:44,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995760414] [2025-02-06 04:46:44,980 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:44,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:44,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 04:46:44,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 04:46:44,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:44,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:46:44,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [625124655] [2025-02-06 04:46:44,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:44,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:44,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:44,988 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 04:46:44,989 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 04:46:45,024 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 04:46:45,028 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 04:46:45,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:45,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:45,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 04:46:45,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:45,039 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 04:46:45,039 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:46:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995760414] [2025-02-06 04:46:45,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:46:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625124655] [2025-02-06 04:46:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625124655] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:45,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:46:45,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:46:45,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515141777] [2025-02-06 04:46:45,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:45,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:46:45,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:45,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:46:45,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:46:45,043 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2025-02-06 04:46:45,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 04:46:45,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:45,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2025-02-06 04:46:45,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:46,757 INFO L124 PetriNetUnfolderBase]: 22712/29278 cut-off events. [2025-02-06 04:46:46,758 INFO L125 PetriNetUnfolderBase]: For 2064/2064 co-relation queries the response was YES. [2025-02-06 04:46:46,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59615 conditions, 29278 events. 22712/29278 cut-off events. For 2064/2064 co-relation queries the response was YES. Maximal size of possible extension queue 1281. Compared 153937 event pairs, 5494 based on Foata normal form. 820/28433 useless extension candidates. Maximal degree in co-relation 17103. Up to 25235 conditions per place. [2025-02-06 04:46:46,894 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 41 selfloop transitions, 4 changer transitions 22/75 dead transitions. [2025-02-06 04:46:46,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 75 transitions, 344 flow [2025-02-06 04:46:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:46:46,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:46:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2025-02-06 04:46:46,896 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6263157894736842 [2025-02-06 04:46:46,896 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 101 flow. Second operand 5 states and 119 transitions. [2025-02-06 04:46:46,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 75 transitions, 344 flow [2025-02-06 04:46:46,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 75 transitions, 334 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-02-06 04:46:46,899 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 132 flow [2025-02-06 04:46:46,899 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2025-02-06 04:46:46,900 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 6 predicate places. [2025-02-06 04:46:46,900 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 132 flow [2025-02-06 04:46:46,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 04:46:46,900 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:46,900 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:46,907 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 04:46:47,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-06 04:46:47,105 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 04:46:47,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1184252815, now seen corresponding path program 1 times [2025-02-06 04:46:47,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:47,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603003485] [2025-02-06 04:46:47,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:47,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:47,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 04:46:47,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 04:46:47,116 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:47,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:47,157 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 04:46:47,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:47,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603003485] [2025-02-06 04:46:47,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603003485] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:47,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:46:47,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:46:47,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616380388] [2025-02-06 04:46:47,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:47,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:46:47,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:47,159 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:46:47,159 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:46:47,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2025-02-06 04:46:47,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 04:46:47,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:47,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2025-02-06 04:46:47,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:48,938 INFO L124 PetriNetUnfolderBase]: 21980/29003 cut-off events. [2025-02-06 04:46:48,938 INFO L125 PetriNetUnfolderBase]: For 17593/17593 co-relation queries the response was YES. [2025-02-06 04:46:48,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71323 conditions, 29003 events. 21980/29003 cut-off events. For 17593/17593 co-relation queries the response was YES. Maximal size of possible extension queue 1234. Compared 165248 event pairs, 15992 based on Foata normal form. 780/28348 useless extension candidates. Maximal degree in co-relation 64596. Up to 23786 conditions per place. [2025-02-06 04:46:49,073 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 41 selfloop transitions, 4 changer transitions 2/56 dead transitions. [2025-02-06 04:46:49,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 285 flow [2025-02-06 04:46:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:46:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:46:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2025-02-06 04:46:49,074 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5105263157894737 [2025-02-06 04:46:49,074 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 132 flow. Second operand 5 states and 97 transitions. [2025-02-06 04:46:49,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 285 flow [2025-02-06 04:46:49,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 276 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-02-06 04:46:49,094 INFO L231 Difference]: Finished difference. Result has 55 places, 39 transitions, 148 flow [2025-02-06 04:46:49,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=55, PETRI_TRANSITIONS=39} [2025-02-06 04:46:49,095 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 8 predicate places. [2025-02-06 04:46:49,095 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 39 transitions, 148 flow [2025-02-06 04:46:49,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 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 04:46:49,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:49,095 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:49,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 04:46:49,095 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 04:46:49,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:49,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1735024761, now seen corresponding path program 1 times [2025-02-06 04:46:49,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:49,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783167442] [2025-02-06 04:46:49,096 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:49,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:49,101 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 04:46:49,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 04:46:49,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:49,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:46:49,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100308778] [2025-02-06 04:46:49,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:49,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:49,112 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 04:46:49,113 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 04:46:49,150 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 04:46:49,158 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 04:46:49,158 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:49,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:49,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 04:46:49,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:49,197 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 04:46:49,197 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:49,252 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 04:46:49,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:49,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783167442] [2025-02-06 04:46:49,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:46:49,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100308778] [2025-02-06 04:46:49,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100308778] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 04:46:49,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-06 04:46:49,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2025-02-06 04:46:49,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175075171] [2025-02-06 04:46:49,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-06 04:46:49,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-06 04:46:49,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:49,255 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-06 04:46:49,255 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:46:49,259 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2025-02-06 04:46:49,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 39 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:49,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:49,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2025-02-06 04:46:49,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:51,798 INFO L124 PetriNetUnfolderBase]: 37117/47524 cut-off events. [2025-02-06 04:46:51,798 INFO L125 PetriNetUnfolderBase]: For 27686/27686 co-relation queries the response was YES. [2025-02-06 04:46:51,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124125 conditions, 47524 events. 37117/47524 cut-off events. For 27686/27686 co-relation queries the response was YES. Maximal size of possible extension queue 1839. Compared 255189 event pairs, 2888 based on Foata normal form. 2136/49635 useless extension candidates. Maximal degree in co-relation 77830. Up to 13091 conditions per place. [2025-02-06 04:46:52,195 INFO L140 encePairwiseOnDemand]: 27/38 looper letters, 81 selfloop transitions, 24 changer transitions 38/151 dead transitions. [2025-02-06 04:46:52,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 151 transitions, 799 flow [2025-02-06 04:46:52,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 04:46:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-02-06 04:46:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2025-02-06 04:46:52,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6210526315789474 [2025-02-06 04:46:52,197 INFO L175 Difference]: Start difference. First operand has 55 places, 39 transitions, 148 flow. Second operand 10 states and 236 transitions. [2025-02-06 04:46:52,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 151 transitions, 799 flow [2025-02-06 04:46:52,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 151 transitions, 796 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 04:46:52,211 INFO L231 Difference]: Finished difference. Result has 68 places, 60 transitions, 366 flow [2025-02-06 04:46:52,211 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=366, PETRI_PLACES=68, PETRI_TRANSITIONS=60} [2025-02-06 04:46:52,212 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 21 predicate places. [2025-02-06 04:46:52,212 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 60 transitions, 366 flow [2025-02-06 04:46:52,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:52,212 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:52,212 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:52,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 04:46:52,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:52,412 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 04:46:52,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1774044751, now seen corresponding path program 2 times [2025-02-06 04:46:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:52,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318358432] [2025-02-06 04:46:52,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:46:52,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:52,420 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-06 04:46:52,432 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:46:52,435 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:46:52,435 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:52,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:52,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318358432] [2025-02-06 04:46:52,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318358432] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:52,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98199484] [2025-02-06 04:46:52,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 04:46:52,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:52,511 INFO L229 MonitoredProcess]: Starting monitored process 7 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 04:46:52,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 04:46:52,546 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-02-06 04:46:52,554 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-02-06 04:46:52,554 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 04:46:52,554 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:52,554 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 04:46:52,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 04:46:52,578 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:46:52,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98199484] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:52,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 04:46:52,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2025-02-06 04:46:52,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269169988] [2025-02-06 04:46:52,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:52,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 04:46:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:52,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 04:46:52,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-02-06 04:46:52,580 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2025-02-06 04:46:52,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 60 transitions, 366 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:52,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:52,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2025-02-06 04:46:52,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:54,765 INFO L124 PetriNetUnfolderBase]: 28212/37468 cut-off events. [2025-02-06 04:46:54,765 INFO L125 PetriNetUnfolderBase]: For 139947/140379 co-relation queries the response was YES. [2025-02-06 04:46:54,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143295 conditions, 37468 events. 28212/37468 cut-off events. For 139947/140379 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 217052 event pairs, 5447 based on Foata normal form. 21/37080 useless extension candidates. Maximal degree in co-relation 129410. Up to 34780 conditions per place. [2025-02-06 04:46:55,052 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 72 selfloop transitions, 5 changer transitions 7/93 dead transitions. [2025-02-06 04:46:55,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 699 flow [2025-02-06 04:46:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 04:46:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 04:46:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2025-02-06 04:46:55,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5307017543859649 [2025-02-06 04:46:55,054 INFO L175 Difference]: Start difference. First operand has 68 places, 60 transitions, 366 flow. Second operand 6 states and 121 transitions. [2025-02-06 04:46:55,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 699 flow [2025-02-06 04:46:55,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 659 flow, removed 17 selfloop flow, removed 3 redundant places. [2025-02-06 04:46:55,451 INFO L231 Difference]: Finished difference. Result has 70 places, 64 transitions, 378 flow [2025-02-06 04:46:55,452 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=378, PETRI_PLACES=70, PETRI_TRANSITIONS=64} [2025-02-06 04:46:55,452 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2025-02-06 04:46:55,452 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 64 transitions, 378 flow [2025-02-06 04:46:55,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 04:46:55,452 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:55,452 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:55,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-06 04:46:55,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-06 04:46:55,653 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 04:46:55,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:55,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1844145340, now seen corresponding path program 1 times [2025-02-06 04:46:55,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:55,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67284725] [2025-02-06 04:46:55,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:55,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:55,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:46:55,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:46:55,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:55,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:46:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673932709] [2025-02-06 04:46:55,677 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:55,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:55,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:55,682 INFO L229 MonitoredProcess]: Starting monitored process 8 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 04:46:55,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 04:46:55,722 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 04:46:55,735 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 04:46:55,735 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:55,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:55,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 04:46:55,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:55,797 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 04:46:55,798 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 04:46:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 04:46:55,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67284725] [2025-02-06 04:46:55,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:46:55,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673932709] [2025-02-06 04:46:55,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673932709] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-06 04:46:55,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 04:46:55,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-02-06 04:46:55,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632204265] [2025-02-06 04:46:55,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:55,857 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:46:55,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:55,857 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:46:55,857 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-02-06 04:46:55,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2025-02-06 04:46:55,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 64 transitions, 378 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 04:46:55,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:55,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2025-02-06 04:46:55,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:46:58,083 INFO L124 PetriNetUnfolderBase]: 26600/34187 cut-off events. [2025-02-06 04:46:58,083 INFO L125 PetriNetUnfolderBase]: For 98963/98963 co-relation queries the response was YES. [2025-02-06 04:46:58,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124174 conditions, 34187 events. 26600/34187 cut-off events. For 98963/98963 co-relation queries the response was YES. Maximal size of possible extension queue 1347. Compared 181448 event pairs, 9794 based on Foata normal form. 778/34712 useless extension candidates. Maximal degree in co-relation 113895. Up to 16427 conditions per place. [2025-02-06 04:46:58,261 INFO L140 encePairwiseOnDemand]: 35/38 looper letters, 28 selfloop transitions, 0 changer transitions 51/86 dead transitions. [2025-02-06 04:46:58,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 660 flow [2025-02-06 04:46:58,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 04:46:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 04:46:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2025-02-06 04:46:58,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5921052631578947 [2025-02-06 04:46:58,262 INFO L175 Difference]: Start difference. First operand has 70 places, 64 transitions, 378 flow. Second operand 4 states and 90 transitions. [2025-02-06 04:46:58,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 660 flow [2025-02-06 04:46:59,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 606 flow, removed 27 selfloop flow, removed 2 redundant places. [2025-02-06 04:46:59,118 INFO L231 Difference]: Finished difference. Result has 69 places, 35 transitions, 155 flow [2025-02-06 04:46:59,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=69, PETRI_TRANSITIONS=35} [2025-02-06 04:46:59,119 INFO L279 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2025-02-06 04:46:59,119 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 35 transitions, 155 flow [2025-02-06 04:46:59,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 04:46:59,119 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:59,119 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:46:59,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 04:46:59,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:59,320 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-02-06 04:46:59,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:59,320 INFO L85 PathProgramCache]: Analyzing trace with hash -916164784, now seen corresponding path program 1 times [2025-02-06 04:46:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:59,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070071847] [2025-02-06 04:46:59,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:59,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:59,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:46:59,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:59,332 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:59,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:46:59,332 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-02-06 04:46:59,333 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-02-06 04:46:59,336 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-02-06 04:46:59,336 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:59,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-02-06 04:46:59,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-02-06 04:46:59,344 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-02-06 04:46:59,345 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-02-06 04:46:59,345 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-02-06 04:46:59,345 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-02-06 04:46:59,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 04:46:59,345 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2025-02-06 04:46:59,345 WARN L246 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-02-06 04:46:59,345 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-02-06 04:46:59,367 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-02-06 04:46:59,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 46 transitions, 148 flow [2025-02-06 04:46:59,374 INFO L124 PetriNetUnfolderBase]: 10/87 cut-off events. [2025-02-06 04:46:59,376 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-02-06 04:46:59,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124 conditions, 87 events. 10/87 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 181 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 99. Up to 10 conditions per place. [2025-02-06 04:46:59,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 46 transitions, 148 flow [2025-02-06 04:46:59,377 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 42 transitions, 136 flow [2025-02-06 04:46:59,377 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 04:46:59,378 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;@322b1fc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 04:46:59,378 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-02-06 04:46:59,379 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 04:46:59,379 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2025-02-06 04:46:59,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 04:46:59,379 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:46:59,379 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 04:46:59,379 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 04:46:59,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:46:59,380 INFO L85 PathProgramCache]: Analyzing trace with hash 274226909, now seen corresponding path program 1 times [2025-02-06 04:46:59,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:46:59,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485323787] [2025-02-06 04:46:59,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:59,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:46:59,383 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 04:46:59,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 04:46:59,387 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:59,387 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-06 04:46:59,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702356928] [2025-02-06 04:46:59,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:46:59,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:46:59,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 04:46:59,389 INFO L229 MonitoredProcess]: Starting monitored process 9 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 04:46:59,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 04:46:59,427 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 04:46:59,430 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 04:46:59,430 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:46:59,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:46:59,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 04:46:59,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 04:46:59,441 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 04:46:59,441 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 04:46:59,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:46:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485323787] [2025-02-06 04:46:59,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-06 04:46:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702356928] [2025-02-06 04:46:59,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702356928] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:46:59,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:46:59,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 04:46:59,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110867979] [2025-02-06 04:46:59,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:46:59,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 04:46:59,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:46:59,443 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 04:46:59,443 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 04:46:59,445 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 46 [2025-02-06 04:46:59,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 42 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 04:46:59,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:46:59,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 46 [2025-02-06 04:46:59,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 04:47:15,510 INFO L124 PetriNetUnfolderBase]: 281237/338833 cut-off events. [2025-02-06 04:47:15,510 INFO L125 PetriNetUnfolderBase]: For 31350/31350 co-relation queries the response was YES. [2025-02-06 04:47:16,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692416 conditions, 338833 events. 281237/338833 cut-off events. For 31350/31350 co-relation queries the response was YES. Maximal size of possible extension queue 10356. Compared 1794410 event pairs, 80824 based on Foata normal form. 7381/331373 useless extension candidates. Maximal degree in co-relation 205752. Up to 297449 conditions per place. [2025-02-06 04:47:17,254 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 51 selfloop transitions, 5 changer transitions 29/95 dead transitions. [2025-02-06 04:47:17,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 457 flow [2025-02-06 04:47:17,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 04:47:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 04:47:17,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2025-02-06 04:47:17,256 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6391304347826087 [2025-02-06 04:47:17,256 INFO L175 Difference]: Start difference. First operand has 59 places, 42 transitions, 136 flow. Second operand 5 states and 147 transitions. [2025-02-06 04:47:17,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 457 flow [2025-02-06 04:47:17,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 95 transitions, 431 flow, removed 12 selfloop flow, removed 1 redundant places. [2025-02-06 04:47:17,270 INFO L231 Difference]: Finished difference. Result has 65 places, 46 transitions, 168 flow [2025-02-06 04:47:17,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=65, PETRI_TRANSITIONS=46} [2025-02-06 04:47:17,271 INFO L279 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2025-02-06 04:47:17,271 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 46 transitions, 168 flow [2025-02-06 04:47:17,271 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 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 04:47:17,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 04:47:17,271 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 04:47:17,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-06 04:47:17,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 04:47:17,472 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 04:47:17,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 04:47:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1929661470, now seen corresponding path program 1 times [2025-02-06 04:47:17,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 04:47:17,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204486255] [2025-02-06 04:47:17,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 04:47:17,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 04:47:17,477 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 04:47:17,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 04:47:17,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 04:47:17,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 04:47:17,527 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 04:47:17,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 04:47:17,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204486255] [2025-02-06 04:47:17,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204486255] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 04:47:17,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 04:47:17,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 04:47:17,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463973819] [2025-02-06 04:47:17,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 04:47:17,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 04:47:17,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 04:47:17,529 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 04:47:17,529 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 04:47:17,529 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 46 [2025-02-06 04:47:17,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 46 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 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 04:47:17,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 04:47:17,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 46 [2025-02-06 04:47:17,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand