./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-new/count_by_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-new/count_by_2.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 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-07 20:17:16,217 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-07 20:17:16,252 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-02-07 20:17:16,256 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-07 20:17:16,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-07 20:17:16,279 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-07 20:17:16,281 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-07 20:17:16,281 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-07 20:17:16,282 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-07 20:17:16,282 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-07 20:17:16,283 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-07 20:17:16,283 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-07 20:17:16,283 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-07 20:17:16,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-07 20:17:16,283 INFO L153 SettingsManager]: * Use SBE=true [2025-02-07 20:17:16,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-07 20:17:16,284 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-07 20:17:16,284 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-07 20:17:16,285 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-07 20:17:16,285 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-07 20:17:16,285 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-07 20:17:16,285 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:17:16,285 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-07 20:17:16,285 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-07 20:17:16,285 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-07 20:17:16,285 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-07 20:17:16,286 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-07 20:17:16,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-07 20:17:16,286 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-07 20:17:16,286 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-07 20:17:16,286 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-07 20:17:16,286 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-07 20:17:16,286 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 -> 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 [2025-02-07 20:17:16,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-07 20:17:16,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-07 20:17:16,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-07 20:17:16,496 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-07 20:17:16,497 INFO L274 PluginConnector]: CDTParser initialized [2025-02-07 20:17:16,497 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_2.i [2025-02-07 20:17:17,617 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/47c07fef4/a9a3d2e4b1d04f978b8abfa020ac42e7/FLAG0ee661705 [2025-02-07 20:17:17,873 INFO L384 CDTParser]: Found 1 translation units. [2025-02-07 20:17:17,873 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i [2025-02-07 20:17:17,884 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/47c07fef4/a9a3d2e4b1d04f978b8abfa020ac42e7/FLAG0ee661705 [2025-02-07 20:17:17,899 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/47c07fef4/a9a3d2e4b1d04f978b8abfa020ac42e7 [2025-02-07 20:17:17,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-07 20:17:17,902 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-07 20:17:17,903 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-07 20:17:17,903 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-07 20:17:17,907 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-07 20:17:17,908 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:17:17" (1/1) ... [2025-02-07 20:17:17,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c1d7632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:17, skipping insertion in model container [2025-02-07 20:17:17,909 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.02 08:17:17" (1/1) ... [2025-02-07 20:17:17,919 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-07 20:17:18,018 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2025-02-07 20:17:18,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:17:18,029 INFO L200 MainTranslator]: Completed pre-run [2025-02-07 20:17:18,038 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2025-02-07 20:17:18,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-07 20:17:18,047 INFO L204 MainTranslator]: Completed translation [2025-02-07 20:17:18,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18 WrapperNode [2025-02-07 20:17:18,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-07 20:17:18,049 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-07 20:17:18,050 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-07 20:17:18,050 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-07 20:17:18,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,057 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,065 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 21 [2025-02-07 20:17:18,065 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-07 20:17:18,066 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-07 20:17:18,066 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-07 20:17:18,066 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-07 20:17:18,070 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,071 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,077 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-07 20:17:18,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,078 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,079 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,079 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,079 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-07 20:17:18,080 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-07 20:17:18,080 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-07 20:17:18,080 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-07 20:17:18,082 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (1/1) ... [2025-02-07 20:17:18,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-07 20:17:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:17:18,105 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-07 20:17:18,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-07 20:17:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-07 20:17:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-07 20:17:18,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-07 20:17:18,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-07 20:17:18,161 INFO L257 CfgBuilder]: Building ICFG [2025-02-07 20:17:18,163 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-07 20:17:18,240 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2025-02-07 20:17:18,240 INFO L308 CfgBuilder]: Performing block encoding [2025-02-07 20:17:18,249 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-07 20:17:18,249 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-07 20:17:18,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:17:18 BoogieIcfgContainer [2025-02-07 20:17:18,250 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-07 20:17:18,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-07 20:17:18,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-07 20:17:18,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-07 20:17:18,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.02 08:17:17" (1/3) ... [2025-02-07 20:17:18,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e3b276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:17:18, skipping insertion in model container [2025-02-07 20:17:18,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.02 08:17:18" (2/3) ... [2025-02-07 20:17:18,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35e3b276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.02 08:17:18, skipping insertion in model container [2025-02-07 20:17:18,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 07.02 08:17:18" (3/3) ... [2025-02-07 20:17:18,256 INFO L128 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2025-02-07 20:17:18,267 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-07 20:17:18,268 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG count_by_2.i that has 1 procedures, 8 locations, 1 initial locations, 1 loop locations, and 1 error locations. [2025-02-07 20:17:18,308 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-07 20:17:18,318 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;@2361c1a0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-07 20:17:18,319 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2025-02-07 20:17:18,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:18,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2025-02-07 20:17:18,326 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:17:18,327 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2025-02-07 20:17:18,327 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:17:18,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:17:18,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1136958, now seen corresponding path program 1 times [2025-02-07 20:17:18,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:17:18,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820746878] [2025-02-07 20:17:18,338 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:17:18,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:17:18,384 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-07 20:17:18,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-07 20:17:18,395 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:17:18,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:18,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:17:18,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820746878] [2025-02-07 20:17:18,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820746878] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-07 20:17:18,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-07 20:17:18,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-07 20:17:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966155480] [2025-02-07 20:17:18,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-07 20:17:18,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-07 20:17:18,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:17:18,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-07 20:17:18,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 20:17:18,461 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:18,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:17:18,474 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2025-02-07 20:17:18,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-07 20:17:18,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2025-02-07 20:17:18,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:17:18,479 INFO L225 Difference]: With dead ends: 15 [2025-02-07 20:17:18,479 INFO L226 Difference]: Without dead ends: 6 [2025-02-07 20:17:18,480 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-07 20:17:18,482 INFO L435 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:17:18,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:17:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2025-02-07 20:17:18,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2025-02-07 20:17:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:18,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2025-02-07 20:17:18,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2025-02-07 20:17:18,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:17:18,500 INFO L471 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2025-02-07 20:17:18,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:18,500 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2025-02-07 20:17:18,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2025-02-07 20:17:18,500 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:17:18,500 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2025-02-07 20:17:18,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-07 20:17:18,501 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:17:18,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:17:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash 35277444, now seen corresponding path program 1 times [2025-02-07 20:17:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:17:18,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140203170] [2025-02-07 20:17:18,501 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:17:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:17:18,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-07 20:17:18,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-07 20:17:18,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:17:18,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:18,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:17:18,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140203170] [2025-02-07 20:17:18,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140203170] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:17:18,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140834594] [2025-02-07 20:17:18,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-07 20:17:18,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:18,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:17:18,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:17:18,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-07 20:17:18,560 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-07 20:17:18,565 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-07 20:17:18,565 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:17:18,565 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:18,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-02-07 20:17:18,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:17:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:18,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:17:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:18,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140834594] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:17:18,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:17:18,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-02-07 20:17:18,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882151542] [2025-02-07 20:17:18,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:17:18,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-07 20:17:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:17:18,609 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-07 20:17:18,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:17:18,610 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:17:18,619 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2025-02-07 20:17:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-07 20:17:18,619 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2025-02-07 20:17:18,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:17:18,619 INFO L225 Difference]: With dead ends: 12 [2025-02-07 20:17:18,619 INFO L226 Difference]: Without dead ends: 9 [2025-02-07 20:17:18,620 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-02-07 20:17:18,620 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:17:18,620 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 10 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:17:18,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2025-02-07 20:17:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2025-02-07 20:17:18,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2025-02-07 20:17:18,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2025-02-07 20:17:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:17:18,622 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2025-02-07 20:17:18,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2025-02-07 20:17:18,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-07 20:17:18,622 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:17:18,622 INFO L218 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2025-02-07 20:17:18,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-07 20:17:18,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:18,824 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:17:18,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:17:18,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1285129538, now seen corresponding path program 2 times [2025-02-07 20:17:18,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:17:18,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926769000] [2025-02-07 20:17:18,827 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:17:18,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:17:18,836 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 8 statements into 2 equivalence classes. [2025-02-07 20:17:18,855 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:17:18,855 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:17:18,855 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:18,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:17:18,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926769000] [2025-02-07 20:17:18,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926769000] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:17:18,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005926870] [2025-02-07 20:17:18,960 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:17:18,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:18,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:17:18,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:17:18,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-07 20:17:18,988 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 8 statements into 2 equivalence classes. [2025-02-07 20:17:18,998 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 8 of 8 statements. [2025-02-07 20:17:18,998 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:17:18,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:18,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-07 20:17:19,001 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:17:19,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:19,019 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:17:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:19,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005926870] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:17:19,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:17:19,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2025-02-07 20:17:19,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855585062] [2025-02-07 20:17:19,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:17:19,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-07 20:17:19,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:17:19,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-07 20:17:19,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:17:19,096 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:19,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:17:19,111 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2025-02-07 20:17:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-07 20:17:19,111 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-07 20:17:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:17:19,112 INFO L225 Difference]: With dead ends: 18 [2025-02-07 20:17:19,112 INFO L226 Difference]: Without dead ends: 15 [2025-02-07 20:17:19,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2025-02-07 20:17:19,112 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:17:19,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:17:19,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2025-02-07 20:17:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2025-02-07 20:17:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2025-02-07 20:17:19,119 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2025-02-07 20:17:19,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:17:19,119 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2025-02-07 20:17:19,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:19,119 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2025-02-07 20:17:19,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2025-02-07 20:17:19,120 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:17:19,120 INFO L218 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2025-02-07 20:17:19,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-07 20:17:19,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:19,321 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:17:19,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:17:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1273477890, now seen corresponding path program 3 times [2025-02-07 20:17:19,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:17:19,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286234164] [2025-02-07 20:17:19,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:17:19,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:17:19,327 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 6 equivalence classes. [2025-02-07 20:17:19,334 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 20:17:19,334 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:17:19,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:19,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:17:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286234164] [2025-02-07 20:17:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286234164] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:17:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316553301] [2025-02-07 20:17:19,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-07 20:17:19,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:19,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:17:19,498 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:17:19,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-07 20:17:19,517 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 14 statements into 6 equivalence classes. [2025-02-07 20:17:19,526 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 14 of 14 statements. [2025-02-07 20:17:19,526 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-07 20:17:19,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:19,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-07 20:17:19,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:17:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:19,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:17:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:19,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316553301] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:17:19,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:17:19,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2025-02-07 20:17:19,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572389322] [2025-02-07 20:17:19,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:17:19,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-07 20:17:19,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:17:19,724 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-07 20:17:19,724 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-02-07 20:17:19,724 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:17:19,746 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2025-02-07 20:17:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-07 20:17:19,747 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2025-02-07 20:17:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:17:19,747 INFO L225 Difference]: With dead ends: 30 [2025-02-07 20:17:19,747 INFO L226 Difference]: Without dead ends: 27 [2025-02-07 20:17:19,748 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2025-02-07 20:17:19,748 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:17:19,748 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:17:19,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2025-02-07 20:17:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2025-02-07 20:17:19,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:19,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2025-02-07 20:17:19,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2025-02-07 20:17:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:17:19,754 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2025-02-07 20:17:19,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2025-02-07 20:17:19,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2025-02-07 20:17:19,754 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:17:19,754 INFO L218 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2025-02-07 20:17:19,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-07 20:17:19,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:19,955 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:17:19,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:17:19,956 INFO L85 PathProgramCache]: Analyzing trace with hash 325962110, now seen corresponding path program 4 times [2025-02-07 20:17:19,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:17:19,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221089067] [2025-02-07 20:17:19,956 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:17:19,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:17:19,963 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 20:17:19,972 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 20:17:19,972 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:17:19,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:20,365 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:20,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:17:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221089067] [2025-02-07 20:17:20,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221089067] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:17:20,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449828381] [2025-02-07 20:17:20,366 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-07 20:17:20,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:20,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:17:20,370 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:17:20,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-07 20:17:20,388 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 26 statements into 2 equivalence classes. [2025-02-07 20:17:20,400 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 26 of 26 statements. [2025-02-07 20:17:20,400 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-07 20:17:20,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:20,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-02-07 20:17:20,402 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:17:20,452 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:20,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:17:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:21,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449828381] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:17:21,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:17:21,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2025-02-07 20:17:21,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488685275] [2025-02-07 20:17:21,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:17:21,107 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-02-07 20:17:21,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:17:21,107 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-02-07 20:17:21,108 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-02-07 20:17:21,109 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:21,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:17:21,146 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2025-02-07 20:17:21,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-07 20:17:21,147 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2025-02-07 20:17:21,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:17:21,147 INFO L225 Difference]: With dead ends: 54 [2025-02-07 20:17:21,147 INFO L226 Difference]: Without dead ends: 51 [2025-02-07 20:17:21,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2025-02-07 20:17:21,148 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-07 20:17:21,148 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-07 20:17:21,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2025-02-07 20:17:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2025-02-07 20:17:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2025-02-07 20:17:21,153 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2025-02-07 20:17:21,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:17:21,153 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2025-02-07 20:17:21,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:21,153 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2025-02-07 20:17:21,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-07 20:17:21,154 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:17:21,154 INFO L218 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2025-02-07 20:17:21,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-07 20:17:21,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:21,355 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:17:21,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:17:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash -598699394, now seen corresponding path program 5 times [2025-02-07 20:17:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:17:21,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138712055] [2025-02-07 20:17:21,355 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:17:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:17:21,361 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 24 equivalence classes. [2025-02-07 20:17:21,393 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 20:17:21,393 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-02-07 20:17:21,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:22,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:17:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138712055] [2025-02-07 20:17:22,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138712055] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:17:22,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274594535] [2025-02-07 20:17:22,393 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-07 20:17:22,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:22,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:17:22,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:17:22,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-07 20:17:22,418 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 50 statements into 24 equivalence classes. [2025-02-07 20:17:22,441 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) and asserted 50 of 50 statements. [2025-02-07 20:17:22,441 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2025-02-07 20:17:22,441 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:22,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 48 conjuncts are in the unsatisfiable core [2025-02-07 20:17:22,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:17:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:22,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:17:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:24,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274594535] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:17:24,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:17:24,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2025-02-07 20:17:24,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462926628] [2025-02-07 20:17:24,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:17:24,676 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2025-02-07 20:17:24,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:17:24,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2025-02-07 20:17:24,682 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-02-07 20:17:24,682 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:17:24,800 INFO L93 Difference]: Finished difference Result 102 states and 149 transitions. [2025-02-07 20:17:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2025-02-07 20:17:24,800 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2025-02-07 20:17:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:17:24,802 INFO L225 Difference]: With dead ends: 102 [2025-02-07 20:17:24,802 INFO L226 Difference]: Without dead ends: 99 [2025-02-07 20:17:24,804 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2025-02-07 20:17:24,806 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:17:24,807 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:17:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-02-07 20:17:24,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2025-02-07 20:17:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2025-02-07 20:17:24,821 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 50 [2025-02-07 20:17:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:17:24,821 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2025-02-07 20:17:24,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2025-02-07 20:17:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2025-02-07 20:17:24,822 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:17:24,822 INFO L218 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1] [2025-02-07 20:17:24,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-07 20:17:25,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:25,027 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:17:25,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:17:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1383408766, now seen corresponding path program 6 times [2025-02-07 20:17:25,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:17:25,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862582482] [2025-02-07 20:17:25,028 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:17:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:17:25,043 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 98 statements into 48 equivalence classes. [2025-02-07 20:17:25,084 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 98 of 98 statements. [2025-02-07 20:17:25,084 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-02-07 20:17:25,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:28,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:17:28,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862582482] [2025-02-07 20:17:28,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862582482] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:17:28,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745604035] [2025-02-07 20:17:28,541 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-07 20:17:28,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:28,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:17:28,543 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:17:28,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-07 20:17:28,567 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 98 statements into 48 equivalence classes. [2025-02-07 20:17:28,610 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) and asserted 98 of 98 statements. [2025-02-07 20:17:28,610 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2025-02-07 20:17:28,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:28,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 96 conjuncts are in the unsatisfiable core [2025-02-07 20:17:28,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:17:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:28,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:17:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:36,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745604035] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:17:36,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:17:36,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2025-02-07 20:17:36,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436145187] [2025-02-07 20:17:36,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:17:36,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2025-02-07 20:17:36,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:17:36,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2025-02-07 20:17:36,181 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2025-02-07 20:17:36,181 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 192 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 191 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:36,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:17:36,410 INFO L93 Difference]: Finished difference Result 198 states and 293 transitions. [2025-02-07 20:17:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2025-02-07 20:17:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 191 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2025-02-07 20:17:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:17:36,412 INFO L225 Difference]: With dead ends: 198 [2025-02-07 20:17:36,412 INFO L226 Difference]: Without dead ends: 195 [2025-02-07 20:17:36,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2025-02-07 20:17:36,414 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-07 20:17:36,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-07 20:17:36,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2025-02-07 20:17:36,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2025-02-07 20:17:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2025-02-07 20:17:36,436 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 98 [2025-02-07 20:17:36,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:17:36,437 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2025-02-07 20:17:36,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.0104166666666667) internal successors, (194), 191 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:17:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2025-02-07 20:17:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2025-02-07 20:17:36,442 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:17:36,442 INFO L218 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1] [2025-02-07 20:17:36,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-07 20:17:36,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-07 20:17:36,643 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:17:36,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:17:36,645 INFO L85 PathProgramCache]: Analyzing trace with hash 742017150, now seen corresponding path program 7 times [2025-02-07 20:17:36,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:17:36,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737130206] [2025-02-07 20:17:36,645 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:17:36,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:17:36,659 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 194 statements into 1 equivalence classes. [2025-02-07 20:17:36,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 194 of 194 statements. [2025-02-07 20:17:36,745 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:17:36,745 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:48,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-07 20:17:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737130206] [2025-02-07 20:17:48,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737130206] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-07 20:17:48,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402758286] [2025-02-07 20:17:48,111 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-07 20:17:48,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:17:48,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-07 20:17:48,113 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-07 20:17:48,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-07 20:17:48,147 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 194 statements into 1 equivalence classes. [2025-02-07 20:17:48,196 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 194 of 194 statements. [2025-02-07 20:17:48,196 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-07 20:17:48,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-07 20:17:48,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 597 conjuncts, 192 conjuncts are in the unsatisfiable core [2025-02-07 20:17:48,204 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-07 20:17:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:17:48,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-07 20:18:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-07 20:18:17,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402758286] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-07 20:18:17,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-07 20:18:17,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2025-02-07 20:18:17,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558918621] [2025-02-07 20:18:17,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-07 20:18:17,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2025-02-07 20:18:17,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-07 20:18:17,117 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2025-02-07 20:18:17,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2025-02-07 20:18:17,123 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 384 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 383 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:18:18,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-07 20:18:18,387 INFO L93 Difference]: Finished difference Result 390 states and 581 transitions. [2025-02-07 20:18:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2025-02-07 20:18:18,387 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 383 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 194 [2025-02-07 20:18:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-07 20:18:18,389 INFO L225 Difference]: With dead ends: 390 [2025-02-07 20:18:18,389 INFO L226 Difference]: Without dead ends: 387 [2025-02-07 20:18:18,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2025-02-07 20:18:18,393 INFO L435 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-07 20:18:18,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-07 20:18:18,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2025-02-07 20:18:18,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2025-02-07 20:18:18,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.0025906735751295) internal successors, (387), 386 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:18:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2025-02-07 20:18:18,414 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 194 [2025-02-07 20:18:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-07 20:18:18,414 INFO L471 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2025-02-07 20:18:18,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 384 states have (on average 1.0052083333333333) internal successors, (386), 383 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-07 20:18:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2025-02-07 20:18:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2025-02-07 20:18:18,418 INFO L210 NwaCegarLoop]: Found error trace [2025-02-07 20:18:18,418 INFO L218 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1] [2025-02-07 20:18:18,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-07 20:18:18,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-07 20:18:18,619 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2025-02-07 20:18:18,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-07 20:18:18,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1974767742, now seen corresponding path program 8 times [2025-02-07 20:18:18,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-07 20:18:18,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703742350] [2025-02-07 20:18:18,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-07 20:18:18,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-07 20:18:18,639 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 386 statements into 2 equivalence classes. [2025-02-07 20:18:18,879 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 386 of 386 statements. [2025-02-07 20:18:18,879 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-07 20:18:18,880 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat