./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:06:56,688 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:06:56,741 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:06:56,747 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:06:56,747 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:06:56,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:06:56,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:06:56,766 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:06:56,767 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:06:56,767 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:06:56,768 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:06:56,768 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:06:56,768 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:06:56,768 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:06:56,768 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:06:56,769 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:06:56,769 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:06:56,769 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:06:56,769 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:06:56,769 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:06:56,769 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:06:56,769 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:06:56,769 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:06:56,769 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:06:56,769 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:06:56,770 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:06:56,770 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:06:56,770 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:06:56,770 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:06:56,770 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:06:56,770 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:06:56,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:06:56,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:06:56,771 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:06:56,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:06:56,771 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:06:56,771 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:06:56,771 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:06:56,771 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:06:56,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:06:56,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:06:56,771 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:06:56,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:06:56,771 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 -> 1f6ee705374b9304c4ad35807ad9bde4a154c7f85315159d7da4519e0aae9554 [2025-02-05 15:06:57,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:06:57,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:06:57,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:06:57,024 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:06:57,024 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:06:57,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2025-02-05 15:06:58,239 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3f100f6ca/09cc0e6cd24544dda2b39cd6b54b617b/FLAGe32846b8c [2025-02-05 15:06:58,478 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:06:58,482 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound2.i [2025-02-05 15:06:58,490 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3f100f6ca/09cc0e6cd24544dda2b39cd6b54b617b/FLAGe32846b8c [2025-02-05 15:06:58,501 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/3f100f6ca/09cc0e6cd24544dda2b39cd6b54b617b [2025-02-05 15:06:58,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:06:58,504 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:06:58,505 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:06:58,505 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:06:58,508 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:06:58,509 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cac0118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58, skipping insertion in model container [2025-02-05 15:06:58,512 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,525 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:06:58,634 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/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2025-02-05 15:06:58,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:06:58,659 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:06:58,670 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/nla-digbench-scaling/divbin_valuebound2.i[950,963] [2025-02-05 15:06:58,677 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:06:58,689 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:06:58,690 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58 WrapperNode [2025-02-05 15:06:58,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:06:58,691 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:06:58,691 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:06:58,691 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:06:58,696 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,701 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,715 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2025-02-05 15:06:58,715 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:06:58,715 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:06:58,715 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:06:58,715 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:06:58,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,729 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,739 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]. [2025-02-05 15:06:58,739 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,739 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,741 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,742 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,743 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:06:58,744 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:06:58,744 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:06:58,744 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:06:58,744 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (1/1) ... [2025-02-05 15:06:58,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:06:58,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:06:58,768 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) [2025-02-05 15:06:58,773 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 [2025-02-05 15:06:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:06:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 15:06:58,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 15:06:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:06:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:06:58,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:06:58,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:06:58,786 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:06:58,820 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:06:58,821 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:06:58,910 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-05 15:06:58,910 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:06:58,920 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:06:58,920 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:06:58,921 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:06:58 BoogieIcfgContainer [2025-02-05 15:06:58,921 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:06:58,922 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:06:58,922 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:06:58,925 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:06:58,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:06:58" (1/3) ... [2025-02-05 15:06:58,926 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1324b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:06:58, skipping insertion in model container [2025-02-05 15:06:58,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:58" (2/3) ... [2025-02-05 15:06:58,926 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1324b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:06:58, skipping insertion in model container [2025-02-05 15:06:58,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:06:58" (3/3) ... [2025-02-05 15:06:58,927 INFO L128 eAbstractionObserver]: Analyzing ICFG divbin_valuebound2.i [2025-02-05 15:06:58,937 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:06:58,938 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG divbin_valuebound2.i that has 3 procedures, 29 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 15:06:58,982 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:06:58,994 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;@306fbbc0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:06:58,994 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:06:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:06:59,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-05 15:06:59,001 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:06:59,001 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:06:59,002 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:06:59,005 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:06:59,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1830921190, now seen corresponding path program 1 times [2025-02-05 15:06:59,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:06:59,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393989815] [2025-02-05 15:06:59,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:06:59,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:06:59,059 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:06:59,073 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:06:59,073 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:06:59,073 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:06:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 15:06:59,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:06:59,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393989815] [2025-02-05 15:06:59,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393989815] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:06:59,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369662650] [2025-02-05 15:06:59,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:06:59,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:06:59,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:06:59,143 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) [2025-02-05 15:06:59,144 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 [2025-02-05 15:06:59,185 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:06:59,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:06:59,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:06:59,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:06:59,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 15:06:59,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:06:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-05 15:06:59,229 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:06:59,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369662650] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:06:59,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:06:59,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 15:06:59,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024775681] [2025-02-05 15:06:59,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:06:59,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:06:59,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:06:59,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:06:59,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:06:59,247 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:06:59,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:06:59,257 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2025-02-05 15:06:59,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:06:59,258 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2025-02-05 15:06:59,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:06:59,261 INFO L225 Difference]: With dead ends: 55 [2025-02-05 15:06:59,261 INFO L226 Difference]: Without dead ends: 25 [2025-02-05 15:06:59,263 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:06:59,264 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:06:59,265 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:06:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-05 15:06:59,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-05 15:06:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2025-02-05 15:06:59,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2025-02-05 15:06:59,284 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2025-02-05 15:06:59,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:06:59,284 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2025-02-05 15:06:59,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2025-02-05 15:06:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2025-02-05 15:06:59,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 15:06:59,285 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:06:59,285 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:06:59,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-05 15:06:59,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-02-05 15:06:59,490 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:06:59,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:06:59,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1038815751, now seen corresponding path program 1 times [2025-02-05 15:06:59,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:06:59,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131000470] [2025-02-05 15:06:59,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:06:59,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:06:59,502 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 15:06:59,538 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 15:06:59,538 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:06:59,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:06:59,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508576009] [2025-02-05 15:06:59,543 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:06:59,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:06:59,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:06:59,546 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) [2025-02-05 15:06:59,547 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 [2025-02-05 15:06:59,580 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 15:06:59,602 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 15:06:59,602 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:06:59,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:06:59,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:06:59,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:06:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-02-05 15:06:59,925 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:07:00,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:00,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131000470] [2025-02-05 15:07:00,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:07:00,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508576009] [2025-02-05 15:07:00,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508576009] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:00,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:07:00,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2025-02-05 15:07:00,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386210274] [2025-02-05 15:07:00,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:07:00,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:07:00,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:00,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:07:00,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:07:00,176 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:07:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:00,519 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2025-02-05 15:07:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:07:00,520 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2025-02-05 15:07:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:00,520 INFO L225 Difference]: With dead ends: 37 [2025-02-05 15:07:00,520 INFO L226 Difference]: Without dead ends: 34 [2025-02-05 15:07:00,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-05 15:07:00,521 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:00,521 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 112 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:07:00,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-05 15:07:00,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-02-05 15:07:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:07:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2025-02-05 15:07:00,526 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2025-02-05 15:07:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:00,527 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2025-02-05 15:07:00,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:07:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2025-02-05 15:07:00,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 15:07:00,528 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:00,528 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:00,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-05 15:07:00,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:00,728 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:00,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1878888186, now seen corresponding path program 1 times [2025-02-05 15:07:00,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:00,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447586289] [2025-02-05 15:07:00,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:00,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:00,738 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 15:07:00,759 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 15:07:00,760 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:00,760 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:07:00,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750988075] [2025-02-05 15:07:00,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:00,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:00,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:00,763 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) [2025-02-05 15:07:00,764 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 [2025-02-05 15:07:00,783 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 15:07:00,800 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 15:07:00,800 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:00,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:00,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:07:00,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 15:07:00,887 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 15:07:00,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:00,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447586289] [2025-02-05 15:07:00,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:07:00,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750988075] [2025-02-05 15:07:00,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750988075] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:00,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:07:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2025-02-05 15:07:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815896567] [2025-02-05 15:07:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:07:00,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:07:00,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:00,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:07:00,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:07:00,971 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:07:05,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2025-02-05 15:07:09,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2025-02-05 15:07:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:09,101 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2025-02-05 15:07:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:07:09,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2025-02-05 15:07:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:09,102 INFO L225 Difference]: With dead ends: 44 [2025-02-05 15:07:09,102 INFO L226 Difference]: Without dead ends: 42 [2025-02-05 15:07:09,102 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-05 15:07:09,105 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:09,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2025-02-05 15:07:09,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-05 15:07:09,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2025-02-05 15:07:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2025-02-05 15:07:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-02-05 15:07:09,117 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 33 [2025-02-05 15:07:09,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:09,118 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-02-05 15:07:09,118 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2025-02-05 15:07:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-02-05 15:07:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 15:07:09,118 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:09,119 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:09,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-05 15:07:09,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:09,323 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:09,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:09,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1646908200, now seen corresponding path program 1 times [2025-02-05 15:07:09,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:09,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665229070] [2025-02-05 15:07:09,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:09,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:09,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:07:09,353 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:07:09,353 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:09,353 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:09,523 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:07:09,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:09,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665229070] [2025-02-05 15:07:09,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665229070] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:09,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759467389] [2025-02-05 15:07:09,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:09,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:09,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:09,527 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) [2025-02-05 15:07:09,528 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 [2025-02-05 15:07:09,556 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:07:09,570 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:07:09,570 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:09,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:09,574 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:07:09,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:09,692 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 15:07:09,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2025-02-05 15:07:09,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759467389] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:07:09,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:07:09,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 12 [2025-02-05 15:07:09,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801960116] [2025-02-05 15:07:09,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:07:09,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:07:09,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:09,768 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:07:09,769 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:07:09,769 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 15:07:10,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:10,033 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2025-02-05 15:07:10,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:07:10,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2025-02-05 15:07:10,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:10,034 INFO L225 Difference]: With dead ends: 56 [2025-02-05 15:07:10,035 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 15:07:10,035 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2025-02-05 15:07:10,035 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:10,036 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 180 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-05 15:07:10,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 15:07:10,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2025-02-05 15:07:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:07:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2025-02-05 15:07:10,041 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 39 [2025-02-05 15:07:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:10,042 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2025-02-05 15:07:10,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2025-02-05 15:07:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2025-02-05 15:07:10,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 15:07:10,042 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:10,043 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:10,048 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 [2025-02-05 15:07:10,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:10,247 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:10,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:10,247 INFO L85 PathProgramCache]: Analyzing trace with hash -882084258, now seen corresponding path program 1 times [2025-02-05 15:07:10,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:10,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154129603] [2025-02-05 15:07:10,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:10,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:10,255 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:07:10,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:07:10,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:10,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:10,518 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2025-02-05 15:07:10,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:10,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154129603] [2025-02-05 15:07:10,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154129603] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:07:10,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:07:10,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 15:07:10,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020029099] [2025-02-05 15:07:10,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:07:10,519 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 15:07:10,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:10,519 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 15:07:10,519 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 15:07:10,519 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 15:07:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:10,553 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2025-02-05 15:07:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 15:07:10,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2025-02-05 15:07:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:10,553 INFO L225 Difference]: With dead ends: 45 [2025-02-05 15:07:10,553 INFO L226 Difference]: Without dead ends: 32 [2025-02-05 15:07:10,554 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 15:07:10,554 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:10,554 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 48 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-05 15:07:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-05 15:07:10,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-05 15:07:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2025-02-05 15:07:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2025-02-05 15:07:10,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 39 [2025-02-05 15:07:10,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:10,562 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2025-02-05 15:07:10,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2025-02-05 15:07:10,562 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2025-02-05 15:07:10,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 15:07:10,563 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:10,563 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:10,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-05 15:07:10,563 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:10,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1352104353, now seen corresponding path program 1 times [2025-02-05 15:07:10,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:10,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869129557] [2025-02-05 15:07:10,563 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:10,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:10,566 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:07:10,577 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:07:10,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:10,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:07:10,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23560717] [2025-02-05 15:07:10,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:10,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:10,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:10,579 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) [2025-02-05 15:07:10,581 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 [2025-02-05 15:07:10,603 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:07:10,643 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:07:10,643 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:10,643 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:10,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-02-05 15:07:10,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 15:07:10,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:19,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869129557] [2025-02-05 15:07:19,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:07:19,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23560717] [2025-02-05 15:07:19,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23560717] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:19,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:07:19,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2025-02-05 15:07:19,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112771367] [2025-02-05 15:07:19,921 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:07:19,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-05 15:07:19,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:19,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-05 15:07:19,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=171, Unknown=2, NotChecked=0, Total=210 [2025-02-05 15:07:19,922 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:07:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:20,050 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2025-02-05 15:07:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:07:20,050 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2025-02-05 15:07:20,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:20,051 INFO L225 Difference]: With dead ends: 45 [2025-02-05 15:07:20,051 INFO L226 Difference]: Without dead ends: 43 [2025-02-05 15:07:20,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=43, Invalid=195, Unknown=2, NotChecked=0, Total=240 [2025-02-05 15:07:20,052 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:20,052 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 119 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:07:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2025-02-05 15:07:20,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2025-02-05 15:07:20,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2025-02-05 15:07:20,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2025-02-05 15:07:20,059 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 41 [2025-02-05 15:07:20,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:20,059 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2025-02-05 15:07:20,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:07:20,059 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2025-02-05 15:07:20,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 15:07:20,060 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:20,060 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:20,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-05 15:07:20,260 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 [2025-02-05 15:07:20,261 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:20,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:20,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1793870020, now seen corresponding path program 2 times [2025-02-05 15:07:20,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:20,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034619157] [2025-02-05 15:07:20,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:07:20,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:20,270 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-05 15:07:20,313 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 15:07:20,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:07:20,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:21,264 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 15:07:21,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:21,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034619157] [2025-02-05 15:07:21,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034619157] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:21,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429791467] [2025-02-05 15:07:21,265 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:07:21,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:21,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:21,269 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) [2025-02-05 15:07:21,271 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 [2025-02-05 15:07:21,289 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-05 15:07:21,330 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 15:07:21,330 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:07:21,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:21,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-05 15:07:21,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 15:07:21,781 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 15:07:26,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429791467] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:07:26,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:07:26,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 23 [2025-02-05 15:07:26,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186350267] [2025-02-05 15:07:26,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:07:26,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:07:26,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:26,307 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:07:26,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=409, Unknown=1, NotChecked=0, Total=506 [2025-02-05 15:07:26,308 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2025-02-05 15:07:27,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:27,193 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2025-02-05 15:07:27,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-02-05 15:07:27,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) Word has length 49 [2025-02-05 15:07:27,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:27,195 INFO L225 Difference]: With dead ends: 85 [2025-02-05 15:07:27,195 INFO L226 Difference]: Without dead ends: 55 [2025-02-05 15:07:27,196 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=149, Invalid=606, Unknown=1, NotChecked=0, Total=756 [2025-02-05 15:07:27,197 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:27,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 207 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2025-02-05 15:07:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2025-02-05 15:07:27,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2025-02-05 15:07:27,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 40 states have internal predecessors, (44), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2025-02-05 15:07:27,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2025-02-05 15:07:27,214 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 49 [2025-02-05 15:07:27,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:27,214 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2025-02-05 15:07:27,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 21 states have internal predecessors, (50), 9 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (15), 9 states have call predecessors, (15), 8 states have call successors, (15) [2025-02-05 15:07:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2025-02-05 15:07:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 15:07:27,215 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:27,215 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:07:27,221 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 [2025-02-05 15:07:27,419 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 [2025-02-05 15:07:27,419 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:27,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1677265797, now seen corresponding path program 3 times [2025-02-05 15:07:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:27,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903252204] [2025-02-05 15:07:27,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:07:27,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:27,428 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 4 equivalence classes. [2025-02-05 15:07:27,472 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 45 of 51 statements. [2025-02-05 15:07:27,472 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:07:27,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 15:07:28,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903252204] [2025-02-05 15:07:28,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903252204] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634678733] [2025-02-05 15:07:28,023 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:07:28,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:28,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:28,025 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) [2025-02-05 15:07:28,027 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 [2025-02-05 15:07:28,044 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 4 equivalence classes. [2025-02-05 15:07:28,143 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 45 of 51 statements. [2025-02-05 15:07:28,143 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:07:28,143 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:28,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-05 15:07:28,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-05 15:07:29,239 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:34,365 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse1 (mod |c_ULTIMATE.start_main_~r~0#1| 4294967296))) (and (forall ((v_z_75 Int)) (or (< 4294967295 v_z_75) (< v_z_75 0) (forall ((v_y_75 Int)) (let ((.cse4 (* v_z_75 4294967295)) (.cse5 (* v_y_75 4294967296))) (let ((.cse0 (+ .cse4 .cse5))) (or (< 1 .cse0) (forall ((v_y_74 Int)) (let ((.cse2 (+ .cse4 (* v_y_74 2) .cse5))) (or (< (+ (mod (+ (* v_y_74 4294967294) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) v_z_75) (+ v_y_74 4294967296)) (< (+ (* v_z_75 8589934590) (* v_y_74 4) (* v_y_75 8589934592)) .cse1) (< .cse1 .cse2) (= .cse3 .cse2) (< 2147483647 .cse2)))) (< .cse0 0))))))) (forall ((v_z_75 Int)) (or (< 4294967295 v_z_75) (forall ((v_y_75 Int)) (let ((.cse9 (* v_z_75 4294967295)) (.cse10 (* v_y_75 4294967296))) (let ((.cse6 (+ .cse9 .cse10))) (or (< 1 .cse6) (forall ((v_y_74 Int)) (let ((.cse7 (+ (mod (+ (* v_y_74 4294967294) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) v_z_75)) (.cse8 (+ .cse9 (* v_y_74 2) .cse10))) (or (< (+ (* v_z_75 8589934590) (* v_y_74 4) (* v_y_75 8589934592)) .cse1) (< 4294967295 .cse7) (< .cse7 v_y_74) (< .cse1 .cse8) (= .cse3 .cse8) (< 2147483647 .cse8)))) (< .cse6 0))))) (< v_z_75 0))) (forall ((v_z_72 Int)) (or (< v_z_72 0) (< 4294967295 v_z_72) (forall ((v_y_72 Int)) (let ((.cse12 (* v_y_72 4294967296)) (.cse13 (* v_z_72 4294967295))) (let ((.cse14 (+ .cse12 .cse13))) (or (forall ((v_y_71 Int)) (let ((.cse11 (+ .cse12 (* v_y_71 2) .cse13))) (or (< (+ (* v_y_71 4) (* v_z_72 8589934590) (* v_y_72 8589934592)) .cse1) (< (+ (mod (+ (* v_y_71 4294967294) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) v_z_72) (+ v_y_71 4294967297)) (= .cse3 .cse11) (< .cse1 .cse11) (< 2147483647 .cse11)))) (< .cse14 0) (< 1 .cse14))))))) (forall ((v_z_72 Int)) (or (< v_z_72 0) (forall ((v_y_72 Int)) (let ((.cse18 (* v_y_72 4294967296)) (.cse19 (* v_z_72 4294967295))) (let ((.cse15 (+ .cse18 .cse19))) (or (< .cse15 0) (forall ((v_y_71 Int)) (let ((.cse17 (+ .cse18 (* v_y_71 2) .cse19)) (.cse16 (+ (mod (+ (* v_y_71 4294967294) |c_ULTIMATE.start_main_~r~0#1|) 4294967296) v_z_72))) (or (< (+ (* v_y_71 4) (* v_z_72 8589934590) (* v_y_72 8589934592)) .cse1) (< 4294967295 .cse16) (= .cse3 .cse17) (< .cse1 .cse17) (< 2147483647 .cse17) (< .cse16 (+ v_y_71 1))))) (< 1 .cse15))))) (< 4294967295 v_z_72))))) is different from false [2025-02-05 15:07:41,424 WARN L286 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 101 DAG size of output: 101 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-02-05 15:08:06,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634678733] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:08:06,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-02-05 15:08:06,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2025-02-05 15:08:06,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349604978] [2025-02-05 15:08:06,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-02-05 15:08:06,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-05 15:08:06,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:08:06,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-05 15:08:06,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=4, NotChecked=50, Total=756 [2025-02-05 15:08:06,421 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-02-05 15:08:11,321 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 [] [2025-02-05 15:08:15,338 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 15:08:19,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 15:08:23,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 15:08:27,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 15:08:31,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 15:08:35,417 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-02-05 15:08:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:08:37,219 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2025-02-05 15:08:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-02-05 15:08:37,220 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 51 [2025-02-05 15:08:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:08:37,221 INFO L225 Difference]: With dead ends: 111 [2025-02-05 15:08:37,222 INFO L226 Difference]: Without dead ends: 77 [2025-02-05 15:08:37,226 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=340, Invalid=1466, Unknown=4, NotChecked=82, Total=1892 [2025-02-05 15:08:37,226 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 35 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.6s IncrementalHoareTripleChecker+Time [2025-02-05 15:08:37,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 337 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 275 Invalid, 7 Unknown, 0 Unchecked, 28.6s Time] [2025-02-05 15:08:37,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2025-02-05 15:08:37,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2025-02-05 15:08:37,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2025-02-05 15:08:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-02-05 15:08:37,243 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 51 [2025-02-05 15:08:37,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:08:37,243 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-02-05 15:08:37,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2025-02-05 15:08:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-02-05 15:08:37,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 15:08:37,246 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:08:37,246 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-05 15:08:37,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-05 15:08:37,447 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 [2025-02-05 15:08:37,447 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:08:37,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:08:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1705894948, now seen corresponding path program 1 times [2025-02-05 15:08:37,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:08:37,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205327465] [2025-02-05 15:08:37,448 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:37,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:08:37,451 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 15:08:37,474 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:08:37,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:37,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:08:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [575978629] [2025-02-05 15:08:37,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:08:37,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:08:37,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:08:37,478 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) [2025-02-05 15:08:37,482 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 [2025-02-05 15:08:37,504 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-02-05 15:08:37,576 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:08:37,576 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:08:37,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:08:37,578 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-05 15:08:37,579 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:08:39,986 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2025-02-05 15:08:39,986 INFO L312 TraceCheckSpWp]: Computing backward predicates...