./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.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_valuebound20.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 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-05 15:06:57,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-05 15:06:57,862 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-05 15:06:57,865 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-05 15:06:57,865 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-05 15:06:57,885 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-05 15:06:57,886 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-05 15:06:57,886 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-05 15:06:57,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-05 15:06:57,886 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-05 15:06:57,887 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-05 15:06:57,887 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-05 15:06:57,887 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-05 15:06:57,887 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-05 15:06:57,887 INFO L153 SettingsManager]: * Use SBE=true [2025-02-05 15:06:57,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-05 15:06:57,888 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-05 15:06:57,888 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-05 15:06:57,888 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-05 15:06:57,888 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-05 15:06:57,888 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-05 15:06:57,889 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-05 15:06:57,889 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-05 15:06:57,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:06:57,890 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-05 15:06:57,890 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-05 15:06:57,890 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-05 15:06:57,890 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-05 15:06:57,890 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-05 15:06:57,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-05 15:06:57,890 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-05 15:06:57,891 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-05 15:06:57,891 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-05 15:06:57,891 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-05 15:06:57,891 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 -> 67e1f0759ae3eef1dbaa6f8b0d73161640ce69ba156f9f744d71e8aa9cf95f87 [2025-02-05 15:06:58,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-05 15:06:58,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-05 15:06:58,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-05 15:06:58,133 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-05 15:06:58,134 INFO L274 PluginConnector]: CDTParser initialized [2025-02-05 15:06:58,134 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2025-02-05 15:06:59,296 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e93ae2aed/be85fe89fe3145d7b54d87f9bb92fa64/FLAGd0cf3d11e [2025-02-05 15:06:59,580 INFO L384 CDTParser]: Found 1 translation units. [2025-02-05 15:06:59,582 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_valuebound20.i [2025-02-05 15:06:59,588 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e93ae2aed/be85fe89fe3145d7b54d87f9bb92fa64/FLAGd0cf3d11e [2025-02-05 15:06:59,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e93ae2aed/be85fe89fe3145d7b54d87f9bb92fa64 [2025-02-05 15:06:59,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-05 15:06:59,877 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-05 15:06:59,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-05 15:06:59,878 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-05 15:06:59,884 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-05 15:06:59,885 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:06:59" (1/1) ... [2025-02-05 15:06:59,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1574222b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:06:59, skipping insertion in model container [2025-02-05 15:06:59,886 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.02 03:06:59" (1/1) ... [2025-02-05 15:06:59,898 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-05 15:06:59,974 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_valuebound20.i[950,963] [2025-02-05 15:06:59,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:06:59,987 INFO L200 MainTranslator]: Completed pre-run [2025-02-05 15:06:59,993 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_valuebound20.i[950,963] [2025-02-05 15:06:59,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-05 15:07:00,004 INFO L204 MainTranslator]: Completed translation [2025-02-05 15:07:00,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00 WrapperNode [2025-02-05 15:07:00,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-05 15:07:00,006 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-05 15:07:00,006 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-05 15:07:00,006 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-05 15:07:00,010 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,013 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,022 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2025-02-05 15:07:00,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-05 15:07:00,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-05 15:07:00,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-05 15:07:00,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-05 15:07:00,027 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,027 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,028 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,034 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 15:07:00,034 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,034 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,035 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,036 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,036 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,036 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,037 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-05 15:07:00,038 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-05 15:07:00,038 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-05 15:07:00,038 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-05 15:07:00,038 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (1/1) ... [2025-02-05 15:07:00,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-05 15:07:00,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:00,058 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 15:07:00,065 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 15:07:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-05 15:07:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2025-02-05 15:07:00,077 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2025-02-05 15:07:00,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-05 15:07:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-05 15:07:00,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-05 15:07:00,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2025-02-05 15:07:00,078 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2025-02-05 15:07:00,111 INFO L257 CfgBuilder]: Building ICFG [2025-02-05 15:07:00,113 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-05 15:07:00,197 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-05 15:07:00,197 INFO L308 CfgBuilder]: Performing block encoding [2025-02-05 15:07:00,202 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-05 15:07:00,203 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-05 15:07:00,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:07:00 BoogieIcfgContainer [2025-02-05 15:07:00,203 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-05 15:07:00,204 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-05 15:07:00,205 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-05 15:07:00,208 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-05 15:07:00,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.02 03:06:59" (1/3) ... [2025-02-05 15:07:00,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46502ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:07:00, skipping insertion in model container [2025-02-05 15:07:00,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.02 03:07:00" (2/3) ... [2025-02-05 15:07:00,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46502ba8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.02 03:07:00, skipping insertion in model container [2025-02-05 15:07:00,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 05.02 03:07:00" (3/3) ... [2025-02-05 15:07:00,210 INFO L128 eAbstractionObserver]: Analyzing ICFG divbin_valuebound20.i [2025-02-05 15:07:00,219 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-05 15:07:00,220 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG divbin_valuebound20.i that has 3 procedures, 29 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2025-02-05 15:07:00,254 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-05 15:07:00,261 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;@6d05a9c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-05 15:07:00,262 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-05 15:07:00,266 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 15:07:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-05 15:07:00,270 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:00,271 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 15:07:00,271 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:00,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:00,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1830921190, now seen corresponding path program 1 times [2025-02-05 15:07:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:00,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335479410] [2025-02-05 15:07:00,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:00,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:00,327 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:07:00,337 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:07:00,337 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:00,337 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:00,371 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 15:07:00,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:00,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335479410] [2025-02-05 15:07:00,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335479410] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:00,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497034361] [2025-02-05 15:07:00,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:00,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:00,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:00,374 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 15:07:00,378 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 15:07:00,410 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-05 15:07:00,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-05 15:07:00,423 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:00,423 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:00,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 1 conjuncts are in the unsatisfiable core [2025-02-05 15:07:00,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:00,435 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 15:07:00,436 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-05 15:07:00,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497034361] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:07:00,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:07:00,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2025-02-05 15:07:00,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536240228] [2025-02-05 15:07:00,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:07:00,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2025-02-05 15:07:00,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:00,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2025-02-05 15:07:00,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2025-02-05 15:07:00,457 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 15:07:00,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:00,474 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2025-02-05 15:07:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2025-02-05 15:07:00,476 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 15:07:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:00,480 INFO L225 Difference]: With dead ends: 55 [2025-02-05 15:07:00,481 INFO L226 Difference]: Without dead ends: 25 [2025-02-05 15:07:00,483 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 15:07:00,484 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 15:07:00,485 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 15:07:00,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-05 15:07:00,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2025-02-05 15:07:00,503 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 15:07:00,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2025-02-05 15:07:00,506 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 30 [2025-02-05 15:07:00,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:00,506 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2025-02-05 15:07:00,507 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 15:07:00,507 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2025-02-05 15:07:00,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-05 15:07:00,508 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:00,508 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 15:07:00,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-05 15:07:00,708 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 15:07:00,709 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:00,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:00,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1038815751, now seen corresponding path program 1 times [2025-02-05 15:07:00,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:00,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39633256] [2025-02-05 15:07:00,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:00,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:00,723 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 15:07:00,762 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 15:07:00,762 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:00,762 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:07:00,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792309626] [2025-02-05 15:07:00,764 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:00,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:00,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:00,766 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 15:07:00,767 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 15:07:00,792 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-05 15:07:00,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-05 15:07:00,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:00,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:00,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:07:00,817 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:01,060 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 15:07:01,060 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:01,387 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 15:07:01,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:01,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39633256] [2025-02-05 15:07:01,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:07:01,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792309626] [2025-02-05 15:07:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792309626] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:01,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:07:01,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2025-02-05 15:07:01,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506836990] [2025-02-05 15:07:01,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:07:01,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-05 15:07:01,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:01,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-05 15:07:01,389 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:07:01,389 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 15:07:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:01,698 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2025-02-05 15:07:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:07:01,699 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 15:07:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:01,699 INFO L225 Difference]: With dead ends: 37 [2025-02-05 15:07:01,699 INFO L226 Difference]: Without dead ends: 34 [2025-02-05 15:07:01,700 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 15:07:01,700 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 15:07:01,700 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 15:07:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-02-05 15:07:01,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2025-02-05 15:07:01,707 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 15:07:01,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2025-02-05 15:07:01,710 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 31 [2025-02-05 15:07:01,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:01,711 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2025-02-05 15:07:01,711 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 15:07:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2025-02-05 15:07:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-02-05 15:07:01,713 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:01,713 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 15:07:01,719 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 15:07:01,918 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 15:07:01,918 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:01,918 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:01,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1878888186, now seen corresponding path program 1 times [2025-02-05 15:07:01,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:01,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418230253] [2025-02-05 15:07:01,919 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:01,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:01,923 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 15:07:01,940 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 15:07:01,940 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:01,940 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:07:01,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168054106] [2025-02-05 15:07:01,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:01,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:01,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:01,943 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 15:07:01,944 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 15:07:01,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-02-05 15:07:01,980 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-02-05 15:07:01,980 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:01,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:01,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-05 15:07:01,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:02,074 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 15:07:02,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:02,154 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 15:07:02,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418230253] [2025-02-05 15:07:02,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:07:02,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168054106] [2025-02-05 15:07:02,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168054106] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:02,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:07:02,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2025-02-05 15:07:02,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191250805] [2025-02-05 15:07:02,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:07:02,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-05 15:07:02,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:02,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-05 15:07:02,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2025-02-05 15:07:02,156 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 15:07:06,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2025-02-05 15:07:10,210 WARN L539 Checker$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 15:07:10,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:10,224 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2025-02-05 15:07:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-05 15:07:10,225 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 15:07:10,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:10,225 INFO L225 Difference]: With dead ends: 44 [2025-02-05 15:07:10,226 INFO L226 Difference]: Without dead ends: 42 [2025-02-05 15:07:10,226 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 15:07:10,227 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s 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, 8.0s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:10,228 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2025-02-05 15:07:10,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2025-02-05 15:07:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2025-02-05 15:07:10,235 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 15:07:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2025-02-05 15:07:10,237 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 33 [2025-02-05 15:07:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:10,237 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2025-02-05 15:07:10,237 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 15:07:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2025-02-05 15:07:10,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 15:07:10,239 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:10,239 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 15:07:10,245 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 15:07:10,443 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 15:07:10,443 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:10,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:10,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1646908200, now seen corresponding path program 1 times [2025-02-05 15:07:10,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:10,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228403105] [2025-02-05 15:07:10,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:10,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:10,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:07:10,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:07:10,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:10,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:10,716 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 15:07:10,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:10,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228403105] [2025-02-05 15:07:10,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228403105] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:10,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137553009] [2025-02-05 15:07:10,718 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:10,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:10,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:10,721 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 15:07:10,722 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 15:07:10,745 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:07:10,757 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:07:10,757 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:10,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:10,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-02-05 15:07:10,759 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:10,831 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 15:07:10,832 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:10,909 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 15:07:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137553009] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:07:10,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:07:10,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 12 [2025-02-05 15:07:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884500098] [2025-02-05 15:07:10,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:07:10,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-05 15:07:10,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:10,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-05 15:07:10,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2025-02-05 15:07:10,911 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 15:07:11,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:11,166 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2025-02-05 15:07:11,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-05 15:07:11,166 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 15:07:11,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:11,168 INFO L225 Difference]: With dead ends: 56 [2025-02-05 15:07:11,168 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 15:07:11,168 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 15:07:11,168 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:11,169 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 180 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:07:11,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 15:07:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2025-02-05 15:07:11,174 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 15:07:11,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2025-02-05 15:07:11,175 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 39 [2025-02-05 15:07:11,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:11,175 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2025-02-05 15:07:11,175 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 15:07:11,175 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2025-02-05 15:07:11,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2025-02-05 15:07:11,175 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:11,176 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 15:07:11,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-05 15:07:11,376 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 15:07:11,376 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:11,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:11,377 INFO L85 PathProgramCache]: Analyzing trace with hash -882084258, now seen corresponding path program 1 times [2025-02-05 15:07:11,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:11,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68609884] [2025-02-05 15:07:11,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:11,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:11,380 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 39 statements into 1 equivalence classes. [2025-02-05 15:07:11,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 39 of 39 statements. [2025-02-05 15:07:11,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:11,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:11,664 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 15:07:11,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:11,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68609884] [2025-02-05 15:07:11,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68609884] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-05 15:07:11,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-05 15:07:11,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-05 15:07:11,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520861265] [2025-02-05 15:07:11,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-05 15:07:11,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-05 15:07:11,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:11,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-05 15:07:11,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-05 15:07:11,667 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 15:07:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:11,692 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2025-02-05 15:07:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-05 15:07:11,693 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 15:07:11,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:11,693 INFO L225 Difference]: With dead ends: 45 [2025-02-05 15:07:11,693 INFO L226 Difference]: Without dead ends: 32 [2025-02-05 15:07:11,693 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 15:07:11,695 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 15:07:11,695 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 15:07:11,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-05 15:07:11,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2025-02-05 15:07:11,703 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 15:07:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2025-02-05 15:07:11,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 39 [2025-02-05 15:07:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:11,705 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2025-02-05 15:07:11,706 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 15:07:11,706 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2025-02-05 15:07:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2025-02-05 15:07:11,706 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:11,706 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 15:07:11,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-05 15:07:11,708 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:11,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1352104353, now seen corresponding path program 1 times [2025-02-05 15:07:11,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:11,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404818783] [2025-02-05 15:07:11,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:11,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:11,711 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:07:11,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:07:11,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:11,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:07:11,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505011314] [2025-02-05 15:07:11,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-05 15:07:11,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:11,735 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 15:07:11,736 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 15:07:11,766 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 41 statements into 1 equivalence classes. [2025-02-05 15:07:11,798 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 41 of 41 statements. [2025-02-05 15:07:11,798 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-05 15:07:11,798 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:11,799 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-05 15:07:11,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-02-05 15:07:11,970 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:16,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:16,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404818783] [2025-02-05 15:07:16,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-02-05 15:07:16,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505011314] [2025-02-05 15:07:16,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505011314] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:16,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2025-02-05 15:07:16,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2025-02-05 15:07:16,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139695622] [2025-02-05 15:07:16,081 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2025-02-05 15:07:16,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-02-05 15:07:16,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:16,082 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-02-05 15:07:16,082 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=101, Unknown=1, NotChecked=0, Total=132 [2025-02-05 15:07:16,082 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:07:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:16,188 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2025-02-05 15:07:16,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-05 15:07:16,188 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 41 [2025-02-05 15:07:16,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:16,189 INFO L225 Difference]: With dead ends: 46 [2025-02-05 15:07:16,189 INFO L226 Difference]: Without dead ends: 44 [2025-02-05 15:07:16,189 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=34, Invalid=121, Unknown=1, NotChecked=0, Total=156 [2025-02-05 15:07:16,190 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:16,190 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 115 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-05 15:07:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2025-02-05 15:07:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2025-02-05 15:07:16,197 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 15:07:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2025-02-05 15:07:16,197 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 41 [2025-02-05 15:07:16,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:16,197 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2025-02-05 15:07:16,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2025-02-05 15:07:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2025-02-05 15:07:16,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2025-02-05 15:07:16,198 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:16,198 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 15:07:16,207 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 15:07:16,400 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 15:07:16,400 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:16,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:16,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1793870020, now seen corresponding path program 2 times [2025-02-05 15:07:16,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:16,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639475927] [2025-02-05 15:07:16,402 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:07:16,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:16,410 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-05 15:07:16,453 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 15:07:16,454 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:07:16,454 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:17,195 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 15:07:17,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-05 15:07:17,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639475927] [2025-02-05 15:07:17,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639475927] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-05 15:07:17,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370269670] [2025-02-05 15:07:17,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-05 15:07:17,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:17,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:17,198 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 15:07:17,200 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 15:07:17,219 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 49 statements into 2 equivalence classes. [2025-02-05 15:07:17,248 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 49 of 49 statements. [2025-02-05 15:07:17,248 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-05 15:07:17,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:17,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-05 15:07:17,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 15:07:17,731 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-05 15:07:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2025-02-05 15:07:18,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370269670] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-05 15:07:18,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-05 15:07:18,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 7] total 23 [2025-02-05 15:07:18,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778020852] [2025-02-05 15:07:18,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-05 15:07:18,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-05 15:07:18,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-05 15:07:18,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-05 15:07:18,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2025-02-05 15:07:18,170 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) [2025-02-05 15:07:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-05 15:07:18,812 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2025-02-05 15:07:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-05 15:07:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) Word has length 49 [2025-02-05 15:07:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-05 15:07:18,817 INFO L225 Difference]: With dead ends: 76 [2025-02-05 15:07:18,817 INFO L226 Difference]: Without dead ends: 49 [2025-02-05 15:07:18,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2025-02-05 15:07:18,818 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-05 15:07:18,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 238 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-05 15:07:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2025-02-05 15:07:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2025-02-05 15:07:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 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 15:07:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2025-02-05 15:07:18,833 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 49 [2025-02-05 15:07:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-05 15:07:18,834 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2025-02-05 15:07:18,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 11 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (17), 11 states have call predecessors, (17), 10 states have call successors, (17) [2025-02-05 15:07:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2025-02-05 15:07:18,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-02-05 15:07:18,834 INFO L210 NwaCegarLoop]: Found error trace [2025-02-05 15:07:18,834 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 15:07:18,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-05 15:07:19,035 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 15:07:19,035 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-05 15:07:19,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-05 15:07:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1677265797, now seen corresponding path program 3 times [2025-02-05 15:07:19,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-05 15:07:19,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013087703] [2025-02-05 15:07:19,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:07:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-05 15:07:19,042 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 4 equivalence classes. [2025-02-05 15:07:19,141 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 51 of 51 statements. [2025-02-05 15:07:19,142 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-02-05 15:07:19,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-02-05 15:07:19,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1667712765] [2025-02-05 15:07:19,143 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-05 15:07:19,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-05 15:07:19,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-05 15:07:19,145 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 15:07:19,146 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 15:07:19,164 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 51 statements into 4 equivalence classes. [2025-02-05 15:07:20,088 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 45 of 51 statements. [2025-02-05 15:07:20,088 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-02-05 15:07:20,088 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-05 15:07:20,089 WARN L254 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-05 15:07:20,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-05 15:07:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2025-02-05 15:07:38,577 INFO L312 TraceCheckSpWp]: Computing backward predicates...