./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/deep-nested.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d 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/loop-simple/deep-nested.c -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 f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:23:07,351 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:23:07,419 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:23:07,429 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:23:07,429 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:23:07,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:23:07,459 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:23:07,459 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:23:07,460 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:23:07,460 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:23:07,460 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:23:07,461 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:23:07,461 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:23:07,461 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:23:07,461 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:23:07,461 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:23:07,461 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:23:07,462 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:23:07,462 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:23:07,462 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:23:07,462 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:23:07,462 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:23:07,462 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:23:07,463 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:23:07,463 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:23:07,463 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:23:07,463 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:23:07,463 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:23:07,463 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:23:07,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:23:07,463 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:23:07,464 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:23:07,464 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:23:07,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:23:07,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:23:07,465 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:23:07,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:23:07,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:23:07,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:23:07,465 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:23:07,465 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:23:07,465 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:23:07,465 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:23:07,465 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 -> f4fa4f6a03e1cc5362361e8e2a443a39504511936859bef102e6d3337f038be8 [2025-02-07 20:23:07,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:23:07,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:23:07,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:23:07,748 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:23:07,749 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:23:07,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/deep-nested.c [2025-02-07 20:23:09,157 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4ab26db70/387ec8e011bb4248b7f72815d6942647/FLAG79d25ebe9 [2025-02-07 20:23:09,403 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:23:09,403 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-simple/deep-nested.c [2025-02-07 20:23:09,411 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4ab26db70/387ec8e011bb4248b7f72815d6942647/FLAG79d25ebe9 [2025-02-07 20:23:09,425 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4ab26db70/387ec8e011bb4248b7f72815d6942647 [2025-02-07 20:23:09,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:23:09,428 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:23:09,429 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:23:09,429 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:23:09,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:23:09,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76394ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09, skipping insertion in model container [2025-02-07 20:23:09,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,449 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:23:09,578 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/loop-simple/deep-nested.c[863,876] [2025-02-07 20:23:09,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:23:09,591 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:23:09,602 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/loop-simple/deep-nested.c[863,876] [2025-02-07 20:23:09,603 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:23:09,616 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:23:09,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09 WrapperNode [2025-02-07 20:23:09,617 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:23:09,618 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:23:09,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:23:09,618 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:23:09,623 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,630 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,642 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2025-02-07 20:23:09,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:23:09,642 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:23:09,642 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:23:09,642 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:23:09,648 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,649 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,658 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]. [2025-02-07 20:23:09,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,660 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,661 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,662 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,662 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:23:09,664 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:23:09,664 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:23:09,664 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:23:09,665 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (1/1) ... [2025-02-07 20:23:09,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:23:09,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:09,691 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) [2025-02-07 20:23:09,694 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 [2025-02-07 20:23:09,714 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:23:09,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:23:09,715 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:23:09,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:23:09,758 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:23:09,759 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:23:09,882 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-07 20:23:09,882 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:23:09,888 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:23:09,889 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:23:09,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:23:09 BoogieIcfgContainer [2025-02-07 20:23:09,889 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:23:09,890 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:23:09,890 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:23:09,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:23:09,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:23:09" (1/3) ... [2025-02-07 20:23:09,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c754e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:23:09, skipping insertion in model container [2025-02-07 20:23:09,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:23:09" (2/3) ... [2025-02-07 20:23:09,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c754e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:23:09, skipping insertion in model container [2025-02-07 20:23:09,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:23:09" (3/3) ... [2025-02-07 20:23:09,895 INFO L128 eAbstractionObserver]: Analyzing ICFG deep-nested.c [2025-02-07 20:23:09,904 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:23:09,906 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG deep-nested.c that has 1 procedures, 12 locations, 1 initial locations, 5 loop locations, and 1 error locations. [2025-02-07 20:23:09,948 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:23:09,963 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;@68c8e8a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:23:09,963 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:23:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 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) [2025-02-07 20:23:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 20:23:09,971 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:09,972 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:23:09,973 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:09,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:09,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1511354787, now seen corresponding path program 1 times [2025-02-07 20:23:09,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:09,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538986128] [2025-02-07 20:23:09,986 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:23:09,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:10,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-07 20:23:10,079 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:23:10,079 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:10,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:23:10,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:10,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538986128] [2025-02-07 20:23:10,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538986128] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:23:10,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:23:10,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-07 20:23:10,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299980993] [2025-02-07 20:23:10,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:23:10,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:23:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:10,357 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:23:10,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-07 20:23:10,360 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 11 states have internal predecessors, (17), 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) Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2025-02-07 20:23:10,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:10,450 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2025-02-07 20:23:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:23:10,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) Word has length 8 [2025-02-07 20:23:10,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:10,458 INFO L225 Difference]: With dead ends: 26 [2025-02-07 20:23:10,458 INFO L226 Difference]: Without dead ends: 13 [2025-02-07 20:23:10,461 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:23:10,463 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:10,464 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:23:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2025-02-07 20:23:10,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2025-02-07 20:23:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 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) [2025-02-07 20:23:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2025-02-07 20:23:10,494 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 8 [2025-02-07 20:23:10,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:10,495 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2025-02-07 20:23:10,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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) [2025-02-07 20:23:10,496 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2025-02-07 20:23:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2025-02-07 20:23:10,497 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:10,498 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:23:10,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 20:23:10,498 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:10,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash -627421745, now seen corresponding path program 1 times [2025-02-07 20:23:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616062528] [2025-02-07 20:23:10,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:23:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:10,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-07 20:23:10,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 20:23:10,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:10,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:10,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:23:10,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:10,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616062528] [2025-02-07 20:23:10,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616062528] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:10,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865156544] [2025-02-07 20:23:10,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:23:10,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:10,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:10,899 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) [2025-02-07 20:23:10,901 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 [2025-02-07 20:23:10,938 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-07 20:23:10,953 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-07 20:23:10,953 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:10,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:10,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-07 20:23:10,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:11,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:23:11,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:23:11,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:23:11,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865156544] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:23:11,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:23:11,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-07 20:23:11,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928626009] [2025-02-07 20:23:11,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:23:11,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 20:23:11,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:11,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 20:23:11,566 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:23:11,566 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2025-02-07 20:23:11,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:11,989 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2025-02-07 20:23:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:23:11,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) Word has length 11 [2025-02-07 20:23:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:11,991 INFO L225 Difference]: With dead ends: 44 [2025-02-07 20:23:11,991 INFO L226 Difference]: Without dead ends: 42 [2025-02-07 20:23:11,991 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2025-02-07 20:23:11,994 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 63 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:11,994 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 5 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:23:11,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-07 20:23:12,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2025-02-07 20:23:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 states have internal predecessors, (39), 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) [2025-02-07 20:23:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 39 transitions. [2025-02-07 20:23:12,007 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 39 transitions. Word has length 11 [2025-02-07 20:23:12,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:12,007 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 39 transitions. [2025-02-07 20:23:12,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 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) [2025-02-07 20:23:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 39 transitions. [2025-02-07 20:23:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2025-02-07 20:23:12,008 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:12,008 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:23:12,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-07 20:23:12,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:12,212 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:12,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:12,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1107388325, now seen corresponding path program 1 times [2025-02-07 20:23:12,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:12,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284078490] [2025-02-07 20:23:12,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:23:12,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:12,219 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-07 20:23:12,245 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 20:23:12,246 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:12,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-07 20:23:12,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:12,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284078490] [2025-02-07 20:23:12,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284078490] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:12,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642318541] [2025-02-07 20:23:12,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:23:12,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:12,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:12,544 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) [2025-02-07 20:23:12,547 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 [2025-02-07 20:23:12,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-07 20:23:12,586 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-07 20:23:12,586 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:12,586 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:12,587 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 20:23:12,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-02-07 20:23:12,623 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:23:12,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642318541] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:23:12,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:23:12,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-02-07 20:23:12,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50714888] [2025-02-07 20:23:12,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:23:12,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:23:12,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:12,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:23:12,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2025-02-07 20:23:12,625 INFO L87 Difference]: Start difference. First operand 28 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2025-02-07 20:23:12,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:12,713 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2025-02-07 20:23:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-07 20:23:12,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) Word has length 21 [2025-02-07 20:23:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:12,714 INFO L225 Difference]: With dead ends: 72 [2025-02-07 20:23:12,714 INFO L226 Difference]: Without dead ends: 53 [2025-02-07 20:23:12,715 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:23:12,716 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:12,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 7 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:23:12,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-02-07 20:23:12,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 30. [2025-02-07 20:23:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:23:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2025-02-07 20:23:12,730 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 21 [2025-02-07 20:23:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:12,730 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2025-02-07 20:23:12,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2025-02-07 20:23:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2025-02-07 20:23:12,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-07 20:23:12,731 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:12,731 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:23:12,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-07 20:23:12,931 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 [2025-02-07 20:23:12,932 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:12,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:12,932 INFO L85 PathProgramCache]: Analyzing trace with hash -219503450, now seen corresponding path program 1 times [2025-02-07 20:23:12,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:12,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179840378] [2025-02-07 20:23:12,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:23:12,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:12,939 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 20:23:12,958 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 20:23:12,958 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:12,958 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-07 20:23:13,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:13,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179840378] [2025-02-07 20:23:13,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179840378] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:13,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788400140] [2025-02-07 20:23:13,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:23:13,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:13,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:13,197 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) [2025-02-07 20:23:13,200 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 [2025-02-07 20:23:13,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-02-07 20:23:13,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-02-07 20:23:13,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:13,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:13,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 20:23:13,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2025-02-07 20:23:13,291 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:23:13,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788400140] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:23:13,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:23:13,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-02-07 20:23:13,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649350430] [2025-02-07 20:23:13,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:23:13,292 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:23:13,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:13,293 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:23:13,293 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:23:13,293 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2025-02-07 20:23:13,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:13,390 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2025-02-07 20:23:13,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:23:13,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) Word has length 23 [2025-02-07 20:23:13,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:13,391 INFO L225 Difference]: With dead ends: 80 [2025-02-07 20:23:13,391 INFO L226 Difference]: Without dead ends: 53 [2025-02-07 20:23:13,391 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:23:13,392 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:13,392 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 7 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:23:13,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2025-02-07 20:23:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2025-02-07 20:23:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 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) [2025-02-07 20:23:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2025-02-07 20:23:13,413 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 23 [2025-02-07 20:23:13,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:13,413 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2025-02-07 20:23:13,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2025-02-07 20:23:13,413 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2025-02-07 20:23:13,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-07 20:23:13,414 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:13,414 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-07 20:23:13,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:23:13,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:13,619 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:13,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:13,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1615101277, now seen corresponding path program 1 times [2025-02-07 20:23:13,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:13,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724359535] [2025-02-07 20:23:13,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:23:13,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:13,626 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 20:23:13,651 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 20:23:13,651 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:13,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-07 20:23:13,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:13,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724359535] [2025-02-07 20:23:13,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724359535] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:13,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546402977] [2025-02-07 20:23:13,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:23:13,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:13,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:13,860 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) [2025-02-07 20:23:13,862 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 [2025-02-07 20:23:13,888 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-02-07 20:23:13,903 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-02-07 20:23:13,903 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:13,903 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:13,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 20:23:13,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:13,950 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2025-02-07 20:23:13,950 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:23:13,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546402977] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:23:13,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:23:13,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-02-07 20:23:13,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65988761] [2025-02-07 20:23:13,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:23:13,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-07 20:23:13,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:13,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-07 20:23:13,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:23:13,951 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2025-02-07 20:23:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:14,044 INFO L93 Difference]: Finished difference Result 66 states and 90 transitions. [2025-02-07 20:23:14,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:23:14,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) Word has length 25 [2025-02-07 20:23:14,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:14,046 INFO L225 Difference]: With dead ends: 66 [2025-02-07 20:23:14,046 INFO L226 Difference]: Without dead ends: 37 [2025-02-07 20:23:14,046 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:23:14,048 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:14,048 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 7 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:23:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2025-02-07 20:23:14,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2025-02-07 20:23:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 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) [2025-02-07 20:23:14,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2025-02-07 20:23:14,068 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 25 [2025-02-07 20:23:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:14,068 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2025-02-07 20:23:14,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2025-02-07 20:23:14,068 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2025-02-07 20:23:14,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-07 20:23:14,068 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:14,069 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-02-07 20:23:14,076 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 [2025-02-07 20:23:14,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:14,269 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:14,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:14,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1210232654, now seen corresponding path program 2 times [2025-02-07 20:23:14,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:14,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387779712] [2025-02-07 20:23:14,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:23:14,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:14,277 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 20:23:14,290 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 30 statements. [2025-02-07 20:23:14,290 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-07 20:23:14,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2025-02-07 20:23:14,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:14,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387779712] [2025-02-07 20:23:14,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387779712] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:14,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198210332] [2025-02-07 20:23:14,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:23:14,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:14,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:14,469 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) [2025-02-07 20:23:14,471 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 [2025-02-07 20:23:14,495 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-02-07 20:23:14,503 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 8 of 30 statements. [2025-02-07 20:23:14,503 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-07 20:23:14,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:14,504 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 20:23:14,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:14,598 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-07 20:23:14,598 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:23:14,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198210332] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:23:14,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:23:14,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2025-02-07 20:23:14,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659514329] [2025-02-07 20:23:14,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:23:14,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:23:14,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:14,599 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:23:14,599 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:23:14,599 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2025-02-07 20:23:14,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:14,668 INFO L93 Difference]: Finished difference Result 59 states and 77 transitions. [2025-02-07 20:23:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:23:14,669 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) Word has length 30 [2025-02-07 20:23:14,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:14,669 INFO L225 Difference]: With dead ends: 59 [2025-02-07 20:23:14,669 INFO L226 Difference]: Without dead ends: 57 [2025-02-07 20:23:14,670 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:23:14,670 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:14,670 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:23:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-02-07 20:23:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2025-02-07 20:23:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.35) internal successors, (54), 40 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) [2025-02-07 20:23:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 54 transitions. [2025-02-07 20:23:14,687 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 54 transitions. Word has length 30 [2025-02-07 20:23:14,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:14,687 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 54 transitions. [2025-02-07 20:23:14,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2025-02-07 20:23:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 54 transitions. [2025-02-07 20:23:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-07 20:23:14,688 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:14,688 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2025-02-07 20:23:14,697 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 [2025-02-07 20:23:14,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:14,889 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:14,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:14,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1400346229, now seen corresponding path program 3 times [2025-02-07 20:23:14,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:14,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668541392] [2025-02-07 20:23:14,889 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:23:14,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:14,900 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 6 equivalence classes. [2025-02-07 20:23:14,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 8 of 39 statements. [2025-02-07 20:23:14,905 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-07 20:23:14,905 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:14,964 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-02-07 20:23:14,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:14,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668541392] [2025-02-07 20:23:14,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668541392] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:14,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329062319] [2025-02-07 20:23:14,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:23:14,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:14,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:14,967 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) [2025-02-07 20:23:14,968 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 [2025-02-07 20:23:14,993 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 6 equivalence classes. [2025-02-07 20:23:15,000 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 8 of 39 statements. [2025-02-07 20:23:15,001 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-02-07 20:23:15,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:15,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 20:23:15,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2025-02-07 20:23:15,104 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-07 20:23:15,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329062319] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:23:15,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-07 20:23:15,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2025-02-07 20:23:15,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283162817] [2025-02-07 20:23:15,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:23:15,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-07 20:23:15,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:15,106 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-07 20:23:15,106 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:23:15,106 INFO L87 Difference]: Start difference. First operand 41 states and 54 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2025-02-07 20:23:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:15,149 INFO L93 Difference]: Finished difference Result 69 states and 90 transitions. [2025-02-07 20:23:15,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-07 20:23:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) Word has length 39 [2025-02-07 20:23:15,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:15,150 INFO L225 Difference]: With dead ends: 69 [2025-02-07 20:23:15,150 INFO L226 Difference]: Without dead ends: 67 [2025-02-07 20:23:15,151 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-02-07 20:23:15,151 INFO L435 NwaCegarLoop]: 3 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:15,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:23:15,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-07 20:23:15,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 47. [2025-02-07 20:23:15,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 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) [2025-02-07 20:23:15,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2025-02-07 20:23:15,166 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 39 [2025-02-07 20:23:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:15,166 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2025-02-07 20:23:15,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2025-02-07 20:23:15,167 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2025-02-07 20:23:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-07 20:23:15,167 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:15,168 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2025-02-07 20:23:15,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-07 20:23:15,372 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,SelfDestructingSolverStorable6 [2025-02-07 20:23:15,372 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:15,372 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:15,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1379202247, now seen corresponding path program 4 times [2025-02-07 20:23:15,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:15,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748850542] [2025-02-07 20:23:15,373 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:23:15,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:15,380 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 46 statements into 2 equivalence classes. [2025-02-07 20:23:15,396 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 20:23:15,397 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:23:15,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2025-02-07 20:23:15,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:15,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748850542] [2025-02-07 20:23:15,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748850542] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:15,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511448446] [2025-02-07 20:23:15,637 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:23:15,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:15,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:15,639 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) [2025-02-07 20:23:15,641 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 [2025-02-07 20:23:15,675 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 46 statements into 2 equivalence classes. [2025-02-07 20:23:15,700 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 46 of 46 statements. [2025-02-07 20:23:15,700 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:23:15,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:15,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 20:23:15,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:15,820 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 92 proven. 16 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-02-07 20:23:15,820 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:23:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 76 proven. 32 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2025-02-07 20:23:15,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511448446] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:23:15,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:23:15,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2025-02-07 20:23:15,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761681494] [2025-02-07 20:23:15,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:23:15,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-07 20:23:15,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:15,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-07 20:23:15,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-02-07 20:23:15,996 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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) [2025-02-07 20:23:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:16,223 INFO L93 Difference]: Finished difference Result 137 states and 186 transitions. [2025-02-07 20:23:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 20:23:16,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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) Word has length 46 [2025-02-07 20:23:16,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:16,224 INFO L225 Difference]: With dead ends: 137 [2025-02-07 20:23:16,224 INFO L226 Difference]: Without dead ends: 83 [2025-02-07 20:23:16,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-02-07 20:23:16,226 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:16,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 10 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:23:16,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-02-07 20:23:16,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2025-02-07 20:23:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 73 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:23:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2025-02-07 20:23:16,245 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 46 [2025-02-07 20:23:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:16,245 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2025-02-07 20:23:16,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.25) internal successors, (68), 16 states have internal predecessors, (68), 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) [2025-02-07 20:23:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2025-02-07 20:23:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2025-02-07 20:23:16,246 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:16,246 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2025-02-07 20:23:16,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 20:23:16,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:16,447 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:16,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:16,448 INFO L85 PathProgramCache]: Analyzing trace with hash 291496997, now seen corresponding path program 5 times [2025-02-07 20:23:16,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:16,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000950501] [2025-02-07 20:23:16,448 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:23:16,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:16,455 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 73 statements into 8 equivalence classes. [2025-02-07 20:23:16,506 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 42 of 73 statements. [2025-02-07 20:23:16,506 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 20:23:16,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 160 proven. 13 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2025-02-07 20:23:17,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:17,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000950501] [2025-02-07 20:23:17,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000950501] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:17,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641084281] [2025-02-07 20:23:17,492 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:23:17,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:17,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:17,496 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) [2025-02-07 20:23:17,498 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 [2025-02-07 20:23:17,529 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 73 statements into 8 equivalence classes. [2025-02-07 20:23:17,578 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) and asserted 42 of 73 statements. [2025-02-07 20:23:17,578 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2025-02-07 20:23:17,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:17,579 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-07 20:23:17,586 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 208 proven. 18 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2025-02-07 20:23:17,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:23:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 208 proven. 18 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2025-02-07 20:23:17,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641084281] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:23:17,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:23:17,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2025-02-07 20:23:17,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10454237] [2025-02-07 20:23:17,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:23:17,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-07 20:23:17,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:17,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-07 20:23:17,861 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2025-02-07 20:23:17,861 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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) [2025-02-07 20:23:18,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:18,654 INFO L93 Difference]: Finished difference Result 309 states and 366 transitions. [2025-02-07 20:23:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-07 20:23:18,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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) Word has length 73 [2025-02-07 20:23:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:18,656 INFO L225 Difference]: With dead ends: 309 [2025-02-07 20:23:18,656 INFO L226 Difference]: Without dead ends: 208 [2025-02-07 20:23:18,658 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 20:23:18,659 INFO L435 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:18,660 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 18 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-07 20:23:18,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2025-02-07 20:23:18,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 122. [2025-02-07 20:23:18,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.165289256198347) internal successors, (141), 121 states have internal predecessors, (141), 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) [2025-02-07 20:23:18,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2025-02-07 20:23:18,703 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 73 [2025-02-07 20:23:18,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:18,706 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2025-02-07 20:23:18,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 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) [2025-02-07 20:23:18,706 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2025-02-07 20:23:18,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-02-07 20:23:18,707 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:18,707 INFO L218 NwaCegarLoop]: trace histogram [26, 25, 25, 8, 7, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2025-02-07 20:23:18,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-07 20:23:18,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:18,911 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:18,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:18,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2041411364, now seen corresponding path program 6 times [2025-02-07 20:23:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:18,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220762915] [2025-02-07 20:23:18,912 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:23:18,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:18,923 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 109 statements into 11 equivalence classes. [2025-02-07 20:23:18,937 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 24 of 109 statements. [2025-02-07 20:23:18,937 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 20:23:18,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 273 proven. 280 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2025-02-07 20:23:19,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:19,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220762915] [2025-02-07 20:23:19,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220762915] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:19,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439579714] [2025-02-07 20:23:19,042 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:23:19,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:19,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:19,044 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:23:19,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-07 20:23:19,079 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 109 statements into 11 equivalence classes. [2025-02-07 20:23:19,095 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 24 of 109 statements. [2025-02-07 20:23:19,095 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-07 20:23:19,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:19,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-07 20:23:19,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:19,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 504 proven. 49 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2025-02-07 20:23:19,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:23:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 553 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2025-02-07 20:23:19,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439579714] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:23:19,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:23:19,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2025-02-07 20:23:19,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666762088] [2025-02-07 20:23:19,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:23:19,578 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-07 20:23:19,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:19,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-07 20:23:19,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2025-02-07 20:23:19,579 INFO L87 Difference]: Start difference. First operand 122 states and 141 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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) [2025-02-07 20:23:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:19,719 INFO L93 Difference]: Finished difference Result 255 states and 296 transitions. [2025-02-07 20:23:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 20:23:19,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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) Word has length 109 [2025-02-07 20:23:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:19,721 INFO L225 Difference]: With dead ends: 255 [2025-02-07 20:23:19,721 INFO L226 Difference]: Without dead ends: 253 [2025-02-07 20:23:19,721 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:23:19,723 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:19,723 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:23:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2025-02-07 20:23:19,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 140. [2025-02-07 20:23:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1654676258992807) internal successors, (162), 139 states have internal predecessors, (162), 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) [2025-02-07 20:23:19,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 162 transitions. [2025-02-07 20:23:19,762 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 162 transitions. Word has length 109 [2025-02-07 20:23:19,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:19,762 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 162 transitions. [2025-02-07 20:23:19,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 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) [2025-02-07 20:23:19,762 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 162 transitions. [2025-02-07 20:23:19,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2025-02-07 20:23:19,765 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:19,765 INFO L218 NwaCegarLoop]: trace histogram [34, 33, 33, 11, 10, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2025-02-07 20:23:19,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-07 20:23:19,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:19,966 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:19,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:19,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1793611485, now seen corresponding path program 7 times [2025-02-07 20:23:19,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:19,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880403992] [2025-02-07 20:23:19,967 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:23:19,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:19,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 139 statements into 1 equivalence classes. [2025-02-07 20:23:20,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 139 of 139 statements. [2025-02-07 20:23:20,046 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:20,046 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 22 proven. 385 refuted. 0 times theorem prover too weak. 1741 trivial. 0 not checked. [2025-02-07 20:23:20,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880403992] [2025-02-07 20:23:20,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880403992] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:20,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995046177] [2025-02-07 20:23:20,584 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:23:20,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:20,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:20,586 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:23:20,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-07 20:23:20,621 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 139 statements into 1 equivalence classes. [2025-02-07 20:23:20,665 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 139 of 139 statements. [2025-02-07 20:23:20,666 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:23:20,666 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:20,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 20:23:20,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 660 proven. 49 refuted. 0 times theorem prover too weak. 1439 trivial. 0 not checked. [2025-02-07 20:23:20,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:23:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 660 proven. 49 refuted. 0 times theorem prover too weak. 1439 trivial. 0 not checked. [2025-02-07 20:23:21,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995046177] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:23:21,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:23:21,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2025-02-07 20:23:21,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535401631] [2025-02-07 20:23:21,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:23:21,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-07 20:23:21,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:21,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-07 20:23:21,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2025-02-07 20:23:21,116 INFO L87 Difference]: Start difference. First operand 140 states and 162 transitions. Second operand has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 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) [2025-02-07 20:23:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:23:35,667 INFO L93 Difference]: Finished difference Result 660 states and 808 transitions. [2025-02-07 20:23:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2025-02-07 20:23:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 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) Word has length 139 [2025-02-07 20:23:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:23:35,669 INFO L225 Difference]: With dead ends: 660 [2025-02-07 20:23:35,670 INFO L226 Difference]: Without dead ends: 523 [2025-02-07 20:23:35,672 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1360 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=843, Invalid=3849, Unknown=0, NotChecked=0, Total=4692 [2025-02-07 20:23:35,672 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 294 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2025-02-07 20:23:35,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 11 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2025-02-07 20:23:35,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2025-02-07 20:23:35,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 464. [2025-02-07 20:23:35,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 1.0734341252699784) internal successors, (497), 463 states have internal predecessors, (497), 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) [2025-02-07 20:23:35,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 497 transitions. [2025-02-07 20:23:35,762 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 497 transitions. Word has length 139 [2025-02-07 20:23:35,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:23:35,762 INFO L471 AbstractCegarLoop]: Abstraction has 464 states and 497 transitions. [2025-02-07 20:23:35,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4782608695652173) internal successors, (80), 23 states have internal predecessors, (80), 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) [2025-02-07 20:23:35,762 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 497 transitions. [2025-02-07 20:23:35,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2025-02-07 20:23:35,767 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:23:35,767 INFO L218 NwaCegarLoop]: trace histogram [133, 132, 132, 24, 23, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2025-02-07 20:23:35,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-07 20:23:35,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:35,968 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:23:35,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:23:35,968 INFO L85 PathProgramCache]: Analyzing trace with hash -746962578, now seen corresponding path program 8 times [2025-02-07 20:23:35,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:23:35,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871898950] [2025-02-07 20:23:35,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:23:35,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:23:35,995 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 462 statements into 2 equivalence classes. [2025-02-07 20:23:36,357 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 462 of 462 statements. [2025-02-07 20:23:36,358 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:23:36,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 29887 backedges. 404 proven. 1933 refuted. 0 times theorem prover too weak. 27550 trivial. 0 not checked. [2025-02-07 20:23:37,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:23:37,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871898950] [2025-02-07 20:23:37,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871898950] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:23:37,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208050969] [2025-02-07 20:23:37,583 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:23:37,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:23:37,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:23:37,585 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:23:37,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-07 20:23:37,658 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 462 statements into 2 equivalence classes. [2025-02-07 20:23:37,784 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 462 of 462 statements. [2025-02-07 20:23:37,784 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:23:37,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:23:37,790 INFO L256 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-07 20:23:37,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:23:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 29887 backedges. 8860 proven. 360 refuted. 0 times theorem prover too weak. 20667 trivial. 0 not checked. [2025-02-07 20:23:38,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:23:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 29887 backedges. 8624 proven. 596 refuted. 0 times theorem prover too weak. 20667 trivial. 0 not checked. [2025-02-07 20:23:38,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208050969] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:23:38,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:23:38,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15, 15] total 34 [2025-02-07 20:23:38,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543891198] [2025-02-07 20:23:38,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:23:38,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-07 20:23:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:23:38,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-07 20:23:38,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2025-02-07 20:23:38,724 INFO L87 Difference]: Start difference. First operand 464 states and 497 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 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) [2025-02-07 20:23:47,075 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 36 DAG size of output: 22 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:23:51,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-07 20:24:01,226 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 34 DAG size of output: 20 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:24:09,755 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification. DAG size of input: 29 DAG size of output: 17 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-07 20:24:35,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:24:35,709 INFO L93 Difference]: Finished difference Result 1392 states and 1620 transitions. [2025-02-07 20:24:35,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-07 20:24:35,709 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 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) Word has length 462 [2025-02-07 20:24:35,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:24:35,713 INFO L225 Difference]: With dead ends: 1392 [2025-02-07 20:24:35,713 INFO L226 Difference]: Without dead ends: 931 [2025-02-07 20:24:35,718 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 897 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 53.1s TimeCoverageRelationStatistics Valid=366, Invalid=1796, Unknown=0, NotChecked=0, Total=2162 [2025-02-07 20:24:35,719 INFO L435 NwaCegarLoop]: 2 mSDtfsCounter, 51 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 22 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2025-02-07 20:24:35,719 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 15 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 457 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2025-02-07 20:24:35,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2025-02-07 20:24:35,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 931. [2025-02-07 20:24:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.0365591397849463) internal successors, (964), 930 states have internal predecessors, (964), 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) [2025-02-07 20:24:35,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 964 transitions. [2025-02-07 20:24:35,886 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 964 transitions. Word has length 462 [2025-02-07 20:24:35,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:24:35,886 INFO L471 AbstractCegarLoop]: Abstraction has 931 states and 964 transitions. [2025-02-07 20:24:35,886 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 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) [2025-02-07 20:24:35,886 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 964 transitions. [2025-02-07 20:24:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 928 [2025-02-07 20:24:35,908 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:24:35,909 INFO L218 NwaCegarLoop]: trace histogram [288, 287, 287, 24, 23, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2025-02-07 20:24:35,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-07 20:24:36,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-07 20:24:36,109 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:24:36,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:24:36,110 INFO L85 PathProgramCache]: Analyzing trace with hash 776873694, now seen corresponding path program 9 times [2025-02-07 20:24:36,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:24:36,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481669853] [2025-02-07 20:24:36,111 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:24:36,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:24:36,173 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 927 statements into 80 equivalence classes. [2025-02-07 20:24:36,181 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 927 statements. [2025-02-07 20:24:36,182 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 20:24:36,182 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:24:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 130947 backedges. 16507 proven. 70453 refuted. 0 times theorem prover too weak. 43987 trivial. 0 not checked. [2025-02-07 20:24:36,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:24:36,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481669853] [2025-02-07 20:24:36,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481669853] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:24:36,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602539879] [2025-02-07 20:24:36,397 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:24:36,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:24:36,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:24:36,399 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:24:36,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-07 20:24:36,504 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 927 statements into 80 equivalence classes. [2025-02-07 20:24:36,521 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 19 of 927 statements. [2025-02-07 20:24:36,521 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-07 20:24:36,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:24:36,525 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-07 20:24:36,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:24:38,747 INFO L134 CoverageAnalysis]: Checked inductivity of 130947 backedges. 49358 proven. 32850 refuted. 0 times theorem prover too weak. 48739 trivial. 0 not checked. [2025-02-07 20:24:38,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:24:40,948 INFO L134 CoverageAnalysis]: Checked inductivity of 130947 backedges. 0 proven. 82208 refuted. 0 times theorem prover too weak. 48739 trivial. 0 not checked. [2025-02-07 20:24:40,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602539879] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:24:40,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:24:40,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2025-02-07 20:24:40,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165015855] [2025-02-07 20:24:40,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:24:40,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-07 20:24:40,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:24:40,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-07 20:24:40,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2025-02-07 20:24:40,953 INFO L87 Difference]: Start difference. First operand 931 states and 964 transitions. Second operand has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 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) [2025-02-07 20:24:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:24:41,652 INFO L93 Difference]: Finished difference Result 3937 states and 4080 transitions. [2025-02-07 20:24:41,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-07 20:24:41,652 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 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) Word has length 927 [2025-02-07 20:24:41,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:24:41,664 INFO L225 Difference]: With dead ends: 3937 [2025-02-07 20:24:41,665 INFO L226 Difference]: Without dead ends: 3241 [2025-02-07 20:24:41,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1861 GetRequests, 1849 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2025-02-07 20:24:41,667 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:24:41,668 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:24:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2025-02-07 20:24:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 1859. [2025-02-07 20:24:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.0365984930032293) internal successors, (1926), 1858 states have internal predecessors, (1926), 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) [2025-02-07 20:24:42,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 1926 transitions. [2025-02-07 20:24:42,063 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 1926 transitions. Word has length 927 [2025-02-07 20:24:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:24:42,063 INFO L471 AbstractCegarLoop]: Abstraction has 1859 states and 1926 transitions. [2025-02-07 20:24:42,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.0) internal successors, (77), 10 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) [2025-02-07 20:24:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 1926 transitions. [2025-02-07 20:24:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1856 [2025-02-07 20:24:42,083 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:24:42,083 INFO L218 NwaCegarLoop]: trace histogram [576, 575, 575, 48, 47, 8, 7, 7, 6, 2, 1, 1, 1, 1] [2025-02-07 20:24:42,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-07 20:24:42,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:24:42,284 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:24:42,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:24:42,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1985049458, now seen corresponding path program 10 times [2025-02-07 20:24:42,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:24:42,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991718363] [2025-02-07 20:24:42,285 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:24:42,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:24:42,386 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1855 statements into 2 equivalence classes.