./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Fibonacci05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci05.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-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 ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 42036c90cf17a9bca9878c7ba1e2de2c7beff8028a525d1b2b84e3f8cdd299d5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 14:30:27,706 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 14:30:27,742 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-02-06 14:30:27,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 14:30:27,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 14:30:27,758 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 14:30:27,758 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 14:30:27,758 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 14:30:27,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 14:30:27,758 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 14:30:27,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 14:30:27,758 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 14:30:27,759 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 14:30:27,759 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 14:30:27,759 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 14:30:27,759 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 14:30:27,759 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 14:30:27,759 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 14:30:27,759 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 14:30:27,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 14:30:27,759 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 14:30:27,759 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 14:30:27,760 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 14:30:27,760 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 14:30:27,761 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 14:30:27,761 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 14:30:27,762 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 14:30:27,762 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 ! overflow) ) 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 -> 42036c90cf17a9bca9878c7ba1e2de2c7beff8028a525d1b2b84e3f8cdd299d5 [2025-02-06 14:30:27,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 14:30:27,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 14:30:27,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 14:30:27,937 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 14:30:27,937 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 14:30:27,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci05.c [2025-02-06 14:30:29,097 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/10176b0e8/785f0ce05565419ebf29b5fc4a53cf90/FLAG2e05b21cb [2025-02-06 14:30:29,325 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 14:30:29,326 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci05.c [2025-02-06 14:30:29,330 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/10176b0e8/785f0ce05565419ebf29b5fc4a53cf90/FLAG2e05b21cb [2025-02-06 14:30:29,345 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/10176b0e8/785f0ce05565419ebf29b5fc4a53cf90 [2025-02-06 14:30:29,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 14:30:29,348 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 14:30:29,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 14:30:29,350 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 14:30:29,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 14:30:29,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65fd8938 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29, skipping insertion in model container [2025-02-06 14:30:29,356 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,364 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 14:30:29,461 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 14:30:29,468 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 14:30:29,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 14:30:29,487 INFO L204 MainTranslator]: Completed translation [2025-02-06 14:30:29,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29 WrapperNode [2025-02-06 14:30:29,488 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 14:30:29,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 14:30:29,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 14:30:29,489 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 14:30:29,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,495 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,502 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2025-02-06 14:30:29,504 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 14:30:29,504 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 14:30:29,504 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 14:30:29,505 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 14:30:29,509 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,509 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,509 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,514 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-06 14:30:29,515 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,515 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,516 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,516 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,516 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,517 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 14:30:29,518 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 14:30:29,518 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 14:30:29,518 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 14:30:29,518 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (1/1) ... [2025-02-06 14:30:29,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 14:30:29,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:29,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 14:30:29,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 14:30:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-02-06 14:30:29,554 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-02-06 14:30:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 14:30:29,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 14:30:29,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 14:30:29,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 14:30:29,601 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 14:30:29,603 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 14:30:29,675 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-02-06 14:30:29,713 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2025-02-06 14:30:29,713 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 14:30:29,722 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 14:30:29,722 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 14:30:29,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 02:30:29 BoogieIcfgContainer [2025-02-06 14:30:29,723 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 14:30:29,725 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 14:30:29,725 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 14:30:29,728 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 14:30:29,728 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 02:30:29" (1/3) ... [2025-02-06 14:30:29,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f69dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 02:30:29, skipping insertion in model container [2025-02-06 14:30:29,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:29" (2/3) ... [2025-02-06 14:30:29,729 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33f69dd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 02:30:29, skipping insertion in model container [2025-02-06 14:30:29,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 02:30:29" (3/3) ... [2025-02-06 14:30:29,730 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci05.c [2025-02-06 14:30:29,739 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 14:30:29,740 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci05.c that has 2 procedures, 32 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-02-06 14:30:29,774 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 14:30:29,781 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;@15666d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 14:30:29,781 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-02-06 14:30:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 14:30:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-06 14:30:29,787 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:29,787 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:29,787 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:29,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:29,790 INFO L85 PathProgramCache]: Analyzing trace with hash 154990982, now seen corresponding path program 1 times [2025-02-06 14:30:29,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:29,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009181931] [2025-02-06 14:30:29,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:29,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:29,835 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 14:30:29,856 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 14:30:29,856 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:29,856 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 14:30:29,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:29,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009181931] [2025-02-06 14:30:29,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009181931] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:29,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 14:30:29,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 14:30:29,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126854155] [2025-02-06 14:30:29,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:29,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 14:30:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:29,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 14:30:29,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 14:30:29,914 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 14:30:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:29,938 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2025-02-06 14:30:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 14:30:29,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-06 14:30:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:29,943 INFO L225 Difference]: With dead ends: 37 [2025-02-06 14:30:29,943 INFO L226 Difference]: Without dead ends: 25 [2025-02-06 14:30:29,945 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 [2025-02-06 14:30:29,947 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:29,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-06 14:30:29,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2025-02-06 14:30:29,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:29,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2025-02-06 14:30:29,968 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2025-02-06 14:30:29,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:29,968 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2025-02-06 14:30:29,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 14:30:29,968 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2025-02-06 14:30:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-06 14:30:29,969 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:29,969 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:29,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 14:30:29,969 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:29,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:29,969 INFO L85 PathProgramCache]: Analyzing trace with hash 509753131, now seen corresponding path program 1 times [2025-02-06 14:30:29,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:29,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153269423] [2025-02-06 14:30:29,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:29,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:29,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 14:30:29,977 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 14:30:29,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:29,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 14:30:30,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:30,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153269423] [2025-02-06 14:30:30,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153269423] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:30,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 14:30:30,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 14:30:30,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883218555] [2025-02-06 14:30:30,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:30,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 14:30:30,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:30,017 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 14:30:30,017 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 14:30:30,017 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 14:30:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:30,089 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2025-02-06 14:30:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 14:30:30,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-06 14:30:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:30,090 INFO L225 Difference]: With dead ends: 25 [2025-02-06 14:30:30,090 INFO L226 Difference]: Without dead ends: 23 [2025-02-06 14:30:30,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 14:30:30,091 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:30,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:30,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-06 14:30:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2025-02-06 14:30:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2025-02-06 14:30:30,098 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2025-02-06 14:30:30,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:30,098 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2025-02-06 14:30:30,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 14:30:30,098 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2025-02-06 14:30:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-06 14:30:30,099 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:30,099 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:30,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 14:30:30,099 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:30,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash -984405394, now seen corresponding path program 1 times [2025-02-06 14:30:30,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:30,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621559379] [2025-02-06 14:30:30,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:30,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:30,109 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 14:30:30,128 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 14:30:30,128 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:30,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-06 14:30:30,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621559379] [2025-02-06 14:30:30,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621559379] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:30,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 14:30:30,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 14:30:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817927869] [2025-02-06 14:30:30,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:30,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 14:30:30,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:30,224 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 14:30:30,224 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 14:30:30,224 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:30,251 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2025-02-06 14:30:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 14:30:30,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2025-02-06 14:30:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:30,252 INFO L225 Difference]: With dead ends: 35 [2025-02-06 14:30:30,253 INFO L226 Difference]: Without dead ends: 33 [2025-02-06 14:30:30,256 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 14:30:30,257 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:30,257 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 69 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:30,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-06 14:30:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2025-02-06 14:30:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-06 14:30:30,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2025-02-06 14:30:30,265 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2025-02-06 14:30:30,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:30,265 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2025-02-06 14:30:30,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:30,266 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2025-02-06 14:30:30,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-06 14:30:30,266 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:30,266 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:30,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 14:30:30,267 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:30,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:30,267 INFO L85 PathProgramCache]: Analyzing trace with hash -119709208, now seen corresponding path program 1 times [2025-02-06 14:30:30,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:30,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179930052] [2025-02-06 14:30:30,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:30,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:30,272 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 14:30:30,280 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 14:30:30,283 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:30,283 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-06 14:30:30,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:30,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179930052] [2025-02-06 14:30:30,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179930052] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:30,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492620460] [2025-02-06 14:30:30,387 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:30,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:30,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:30,393 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:30,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 14:30:30,423 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 14:30:30,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 14:30:30,438 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:30,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,440 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 14:30:30,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-06 14:30:30,546 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:30,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-06 14:30:30,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492620460] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:30,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:30,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-02-06 14:30:30,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940122146] [2025-02-06 14:30:30,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:30,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 14:30:30,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:30,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 14:30:30,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-02-06 14:30:30,681 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-06 14:30:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:30,908 INFO L93 Difference]: Finished difference Result 91 states and 129 transitions. [2025-02-06 14:30:30,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 14:30:30,908 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2025-02-06 14:30:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:30,909 INFO L225 Difference]: With dead ends: 91 [2025-02-06 14:30:30,910 INFO L226 Difference]: Without dead ends: 65 [2025-02-06 14:30:30,911 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-02-06 14:30:30,912 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 134 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:30,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 92 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:30,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-06 14:30:30,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2025-02-06 14:30:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-06 14:30:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2025-02-06 14:30:30,926 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 31 [2025-02-06 14:30:30,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:30,926 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2025-02-06 14:30:30,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-06 14:30:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2025-02-06 14:30:30,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-06 14:30:30,928 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:30,928 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:30,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 14:30:31,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:31,133 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:31,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:31,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1220480843, now seen corresponding path program 2 times [2025-02-06 14:30:31,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:31,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154584872] [2025-02-06 14:30:31,134 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:31,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:31,141 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-06 14:30:31,146 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 14:30:31,146 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:31,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 14:30:31,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:31,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154584872] [2025-02-06 14:30:31,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154584872] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:31,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863689188] [2025-02-06 14:30:31,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:31,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:31,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:31,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:31,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 14:30:31,233 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-06 14:30:31,241 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-06 14:30:31,241 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:31,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:31,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 14:30:31,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 14:30:31,270 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 14:30:31,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863689188] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:31,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 14:30:31,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-02-06 14:30:31,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999718882] [2025-02-06 14:30:31,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:31,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 14:30:31,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:31,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 14:30:31,271 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 14:30:31,272 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:31,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:31,300 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2025-02-06 14:30:31,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 14:30:31,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2025-02-06 14:30:31,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:31,301 INFO L225 Difference]: With dead ends: 60 [2025-02-06 14:30:31,301 INFO L226 Difference]: Without dead ends: 59 [2025-02-06 14:30:31,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 14:30:31,301 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:31,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 51 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:31,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-06 14:30:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2025-02-06 14:30:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 states have internal predecessors, (45), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 9 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-06 14:30:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2025-02-06 14:30:31,308 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2025-02-06 14:30:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:31,308 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2025-02-06 14:30:31,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2025-02-06 14:30:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-06 14:30:31,309 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:31,309 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:31,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 14:30:31,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:31,510 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:31,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash 929820207, now seen corresponding path program 1 times [2025-02-06 14:30:31,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:31,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733882241] [2025-02-06 14:30:31,511 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:31,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:31,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 14:30:31,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 14:30:31,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:31,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-06 14:30:31,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733882241] [2025-02-06 14:30:31,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733882241] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:31,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402806536] [2025-02-06 14:30:31,595 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:31,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:31,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:31,597 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:31,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 14:30:31,617 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 14:30:31,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 14:30:31,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:31,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:31,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 14:30:31,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-06 14:30:31,724 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 14:30:31,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402806536] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:31,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 14:30:31,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-06 14:30:31,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239047086] [2025-02-06 14:30:31,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:31,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 14:30:31,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:31,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 14:30:31,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-06 14:30:31,726 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:31,756 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2025-02-06 14:30:31,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 14:30:31,756 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2025-02-06 14:30:31,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:31,757 INFO L225 Difference]: With dead ends: 82 [2025-02-06 14:30:31,758 INFO L226 Difference]: Without dead ends: 81 [2025-02-06 14:30:31,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-06 14:30:31,758 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:31,758 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 71 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-02-06 14:30:31,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2025-02-06 14:30:31,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (27), 11 states have call predecessors, (27), 7 states have call successors, (27) [2025-02-06 14:30:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2025-02-06 14:30:31,777 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 32 [2025-02-06 14:30:31,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:31,778 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2025-02-06 14:30:31,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2025-02-06 14:30:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-06 14:30:31,780 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:31,780 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:31,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:31,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:31,981 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:31,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:31,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1465088786, now seen corresponding path program 1 times [2025-02-06 14:30:31,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:31,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723960335] [2025-02-06 14:30:31,981 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:31,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:31,988 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-06 14:30:31,999 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-06 14:30:31,999 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:31,999 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 14:30:32,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723960335] [2025-02-06 14:30:32,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723960335] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170721270] [2025-02-06 14:30:32,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:32,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:32,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:32,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:32,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 14:30:32,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-06 14:30:32,134 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-06 14:30:32,134 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:32,134 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:32,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 14:30:32,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-06 14:30:32,211 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-06 14:30:32,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170721270] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:32,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:32,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-02-06 14:30:32,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513544756] [2025-02-06 14:30:32,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:32,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 14:30:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:32,358 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 14:30:32,358 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-02-06 14:30:32,358 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-06 14:30:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:32,604 INFO L93 Difference]: Finished difference Result 141 states and 217 transitions. [2025-02-06 14:30:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 14:30:32,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2025-02-06 14:30:32,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:32,608 INFO L225 Difference]: With dead ends: 141 [2025-02-06 14:30:32,608 INFO L226 Difference]: Without dead ends: 139 [2025-02-06 14:30:32,608 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-02-06 14:30:32,609 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:32,609 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 194 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-02-06 14:30:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2025-02-06 14:30:32,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 11 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (66), 20 states have call predecessors, (66), 10 states have call successors, (66) [2025-02-06 14:30:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 159 transitions. [2025-02-06 14:30:32,630 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 159 transitions. Word has length 46 [2025-02-06 14:30:32,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:32,631 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 159 transitions. [2025-02-06 14:30:32,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-06 14:30:32,631 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 159 transitions. [2025-02-06 14:30:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2025-02-06 14:30:32,636 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:32,636 INFO L218 NwaCegarLoop]: trace histogram [14, 11, 9, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1] [2025-02-06 14:30:32,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-06 14:30:32,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-06 14:30:32,839 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:32,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:32,840 INFO L85 PathProgramCache]: Analyzing trace with hash -187782971, now seen corresponding path program 1 times [2025-02-06 14:30:32,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:32,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576403885] [2025-02-06 14:30:32,840 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:32,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:32,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 122 statements into 1 equivalence classes. [2025-02-06 14:30:32,873 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 122 of 122 statements. [2025-02-06 14:30:32,880 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:32,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 55 proven. 149 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2025-02-06 14:30:33,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:33,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576403885] [2025-02-06 14:30:33,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576403885] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:33,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470272384] [2025-02-06 14:30:33,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:33,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:33,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:33,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:33,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 14:30:33,203 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 122 statements into 1 equivalence classes. [2025-02-06 14:30:33,224 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 122 of 122 statements. [2025-02-06 14:30:33,224 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:33,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:33,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 14:30:33,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 295 proven. 67 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2025-02-06 14:30:33,288 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 69 proven. 194 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2025-02-06 14:30:33,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470272384] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:33,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:33,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 13 [2025-02-06 14:30:33,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978407203] [2025-02-06 14:30:33,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:33,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 14:30:33,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:33,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 14:30:33,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-06 14:30:33,506 INFO L87 Difference]: Start difference. First operand 98 states and 159 transitions. Second operand has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 8 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-06 14:30:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:33,615 INFO L93 Difference]: Finished difference Result 224 states and 401 transitions. [2025-02-06 14:30:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 14:30:33,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 8 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 122 [2025-02-06 14:30:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:33,617 INFO L225 Difference]: With dead ends: 224 [2025-02-06 14:30:33,617 INFO L226 Difference]: Without dead ends: 130 [2025-02-06 14:30:33,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 238 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2025-02-06 14:30:33,619 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 108 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:33,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 72 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:33,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-02-06 14:30:33,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2025-02-06 14:30:33,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 84 states have internal predecessors, (93), 12 states have call successors, (12), 3 states have call predecessors, (12), 10 states have return successors, (75), 22 states have call predecessors, (75), 11 states have call successors, (75) [2025-02-06 14:30:33,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 180 transitions. [2025-02-06 14:30:33,632 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 180 transitions. Word has length 122 [2025-02-06 14:30:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:33,632 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 180 transitions. [2025-02-06 14:30:33,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.923076923076923) internal successors, (77), 13 states have internal predecessors, (77), 8 states have call successors, (14), 3 states have call predecessors, (14), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-06 14:30:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 180 transitions. [2025-02-06 14:30:33,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-02-06 14:30:33,634 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:33,634 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:33,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:33,837 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:33,838 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:33,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:33,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1672687667, now seen corresponding path program 2 times [2025-02-06 14:30:33,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:33,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325515825] [2025-02-06 14:30:33,839 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:33,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:33,843 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 88 statements into 2 equivalence classes. [2025-02-06 14:30:33,848 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 88 of 88 statements. [2025-02-06 14:30:33,848 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:33,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2025-02-06 14:30:33,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:33,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325515825] [2025-02-06 14:30:33,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325515825] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:33,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199386184] [2025-02-06 14:30:33,895 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:33,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:33,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:33,897 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:33,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 14:30:33,918 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 88 statements into 2 equivalence classes. [2025-02-06 14:30:33,933 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 88 of 88 statements. [2025-02-06 14:30:33,933 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:33,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:33,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 14:30:33,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2025-02-06 14:30:34,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2025-02-06 14:30:34,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199386184] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:34,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:34,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-02-06 14:30:34,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942855538] [2025-02-06 14:30:34,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:34,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 14:30:34,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:34,282 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 14:30:34,282 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-02-06 14:30:34,283 INFO L87 Difference]: Start difference. First operand 110 states and 180 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-06 14:30:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:34,379 INFO L93 Difference]: Finished difference Result 173 states and 293 transitions. [2025-02-06 14:30:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-06 14:30:34,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 88 [2025-02-06 14:30:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:34,380 INFO L225 Difference]: With dead ends: 173 [2025-02-06 14:30:34,380 INFO L226 Difference]: Without dead ends: 67 [2025-02-06 14:30:34,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 164 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2025-02-06 14:30:34,382 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:34,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 58 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2025-02-06 14:30:34,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2025-02-06 14:30:34,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (26), 10 states have call predecessors, (26), 6 states have call successors, (26) [2025-02-06 14:30:34,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2025-02-06 14:30:34,391 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 88 [2025-02-06 14:30:34,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:34,391 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2025-02-06 14:30:34,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 4 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-06 14:30:34,391 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2025-02-06 14:30:34,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-02-06 14:30:34,392 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:34,392 INFO L218 NwaCegarLoop]: trace histogram [14, 12, 11, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1] [2025-02-06 14:30:34,402 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 [2025-02-06 14:30:34,592 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,SelfDestructingSolverStorable8 [2025-02-06 14:30:34,593 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:34,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:34,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1695716789, now seen corresponding path program 2 times [2025-02-06 14:30:34,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:34,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818513000] [2025-02-06 14:30:34,593 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:34,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:34,600 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 130 statements into 2 equivalence classes. [2025-02-06 14:30:34,614 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 130 of 130 statements. [2025-02-06 14:30:34,616 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:34,616 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 59 proven. 135 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2025-02-06 14:30:34,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:34,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818513000] [2025-02-06 14:30:34,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818513000] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:34,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929150508] [2025-02-06 14:30:34,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:34,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:34,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:34,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:34,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 14:30:34,779 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 130 statements into 2 equivalence classes. [2025-02-06 14:30:34,799 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 130 of 130 statements. [2025-02-06 14:30:34,799 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:34,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:34,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 14:30:34,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 306 proven. 15 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2025-02-06 14:30:34,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:35,113 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 62 proven. 168 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2025-02-06 14:30:35,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929150508] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:35,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:35,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2025-02-06 14:30:35,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443882053] [2025-02-06 14:30:35,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:35,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 14:30:35,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:35,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 14:30:35,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-06 14:30:35,115 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-06 14:30:35,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:35,195 INFO L93 Difference]: Finished difference Result 115 states and 163 transitions. [2025-02-06 14:30:35,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 14:30:35,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 130 [2025-02-06 14:30:35,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:35,196 INFO L225 Difference]: With dead ends: 115 [2025-02-06 14:30:35,196 INFO L226 Difference]: Without dead ends: 56 [2025-02-06 14:30:35,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-02-06 14:30:35,197 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:35,197 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 67 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:35,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-06 14:30:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2025-02-06 14:30:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (14), 8 states have call predecessors, (14), 5 states have call successors, (14) [2025-02-06 14:30:35,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-02-06 14:30:35,201 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 130 [2025-02-06 14:30:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:35,202 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-02-06 14:30:35,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-06 14:30:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-02-06 14:30:35,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2025-02-06 14:30:35,203 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:35,203 INFO L218 NwaCegarLoop]: trace histogram [18, 15, 15, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1] [2025-02-06 14:30:35,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:35,407 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:35,407 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:35,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:35,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1704567080, now seen corresponding path program 3 times [2025-02-06 14:30:35,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:35,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358072564] [2025-02-06 14:30:35,407 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:35,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:35,413 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 165 statements into 14 equivalence classes. [2025-02-06 14:30:35,422 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 103 of 165 statements. [2025-02-06 14:30:35,422 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-06 14:30:35,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 288 proven. 84 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2025-02-06 14:30:35,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:35,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358072564] [2025-02-06 14:30:35,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358072564] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:35,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489583335] [2025-02-06 14:30:35,543 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:35,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:35,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:35,545 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:35,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 14:30:35,578 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 165 statements into 14 equivalence classes. [2025-02-06 14:30:35,601 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 103 of 165 statements. [2025-02-06 14:30:35,601 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-06 14:30:35,601 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:35,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 14:30:35,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 282 proven. 89 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2025-02-06 14:30:35,656 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 282 proven. 92 refuted. 0 times theorem prover too weak. 530 trivial. 0 not checked. [2025-02-06 14:30:35,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489583335] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:35,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:35,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 15 [2025-02-06 14:30:35,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346876094] [2025-02-06 14:30:35,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:35,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 14:30:35,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:35,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 14:30:35,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-02-06 14:30:35,950 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 6 states have call successors, (12), 1 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2025-02-06 14:30:36,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:36,261 INFO L93 Difference]: Finished difference Result 142 states and 177 transitions. [2025-02-06 14:30:36,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-06 14:30:36,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 6 states have call successors, (12), 1 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) Word has length 165 [2025-02-06 14:30:36,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:36,263 INFO L225 Difference]: With dead ends: 142 [2025-02-06 14:30:36,266 INFO L226 Difference]: Without dead ends: 85 [2025-02-06 14:30:36,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 325 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2025-02-06 14:30:36,267 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 98 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:36,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 80 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:36,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-06 14:30:36,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2025-02-06 14:30:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 57 states have internal predecessors, (64), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (17), 11 states have call predecessors, (17), 7 states have call successors, (17) [2025-02-06 14:30:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2025-02-06 14:30:36,281 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 165 [2025-02-06 14:30:36,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:36,282 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2025-02-06 14:30:36,282 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 6 states have call successors, (12), 1 states have call predecessors, (12), 5 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2025-02-06 14:30:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2025-02-06 14:30:36,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2025-02-06 14:30:36,282 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:36,282 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:36,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 14:30:36,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:36,483 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:36,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:36,488 INFO L85 PathProgramCache]: Analyzing trace with hash 253207638, now seen corresponding path program 4 times [2025-02-06 14:30:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:36,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041152683] [2025-02-06 14:30:36,488 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:30:36,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:36,499 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 86 statements into 2 equivalence classes. [2025-02-06 14:30:36,506 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 51 of 86 statements. [2025-02-06 14:30:36,506 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 14:30:36,506 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:36,608 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 84 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-02-06 14:30:36,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:36,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041152683] [2025-02-06 14:30:36,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041152683] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:36,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422701205] [2025-02-06 14:30:36,609 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:30:36,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:36,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:36,611 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:36,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 14:30:36,639 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 86 statements into 2 equivalence classes. [2025-02-06 14:30:36,648 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 51 of 86 statements. [2025-02-06 14:30:36,648 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 14:30:36,648 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:36,649 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 14:30:36,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 125 proven. 37 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-06 14:30:36,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 90 proven. 62 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-06 14:30:37,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422701205] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:37,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:37,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 16 [2025-02-06 14:30:37,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804559608] [2025-02-06 14:30:37,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:37,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 14:30:37,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:37,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 14:30:37,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2025-02-06 14:30:37,059 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 9 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2025-02-06 14:30:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:37,153 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2025-02-06 14:30:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 14:30:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 9 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 86 [2025-02-06 14:30:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:37,154 INFO L225 Difference]: With dead ends: 136 [2025-02-06 14:30:37,154 INFO L226 Difference]: Without dead ends: 68 [2025-02-06 14:30:37,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 163 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2025-02-06 14:30:37,155 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 46 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:37,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 83 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2025-02-06 14:30:37,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2025-02-06 14:30:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 52 states have internal predecessors, (59), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2025-02-06 14:30:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2025-02-06 14:30:37,159 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 86 [2025-02-06 14:30:37,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:37,159 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2025-02-06 14:30:37,159 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 9 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2025-02-06 14:30:37,160 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2025-02-06 14:30:37,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2025-02-06 14:30:37,161 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:37,161 INFO L218 NwaCegarLoop]: trace histogram [23, 21, 18, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 7, 5, 1, 1, 1, 1, 1] [2025-02-06 14:30:37,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:37,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:37,365 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:37,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash -639135331, now seen corresponding path program 5 times [2025-02-06 14:30:37,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:37,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102487822] [2025-02-06 14:30:37,365 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 14:30:37,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:37,376 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 217 statements into 15 equivalence classes. [2025-02-06 14:30:37,383 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 137 of 217 statements. [2025-02-06 14:30:37,383 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-06 14:30:37,383 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 301 proven. 501 refuted. 0 times theorem prover too weak. 797 trivial. 0 not checked. [2025-02-06 14:30:37,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:37,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102487822] [2025-02-06 14:30:37,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102487822] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:37,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78391231] [2025-02-06 14:30:37,555 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 14:30:37,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:37,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:37,560 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:37,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 14:30:37,591 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 217 statements into 15 equivalence classes. [2025-02-06 14:30:37,611 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 137 of 217 statements. [2025-02-06 14:30:37,611 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-02-06 14:30:37,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:37,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-02-06 14:30:37,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 650 proven. 384 refuted. 0 times theorem prover too weak. 565 trivial. 0 not checked. [2025-02-06 14:30:37,709 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 302 proven. 509 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2025-02-06 14:30:38,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78391231] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:38,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:38,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 15] total 21 [2025-02-06 14:30:38,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943486762] [2025-02-06 14:30:38,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:38,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-06 14:30:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:38,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-06 14:30:38,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-02-06 14:30:38,279 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 13 states have call successors, (21), 3 states have call predecessors, (21), 7 states have return successors, (21), 10 states have call predecessors, (21), 12 states have call successors, (21) [2025-02-06 14:30:38,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:38,459 INFO L93 Difference]: Finished difference Result 158 states and 188 transitions. [2025-02-06 14:30:38,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 14:30:38,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 13 states have call successors, (21), 3 states have call predecessors, (21), 7 states have return successors, (21), 10 states have call predecessors, (21), 12 states have call successors, (21) Word has length 217 [2025-02-06 14:30:38,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:38,460 INFO L225 Difference]: With dead ends: 158 [2025-02-06 14:30:38,460 INFO L226 Difference]: Without dead ends: 96 [2025-02-06 14:30:38,461 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 424 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2025-02-06 14:30:38,461 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 131 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:38,461 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 93 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2025-02-06 14:30:38,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 83. [2025-02-06 14:30:38,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 64 states have internal predecessors, (72), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2025-02-06 14:30:38,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 98 transitions. [2025-02-06 14:30:38,466 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 98 transitions. Word has length 217 [2025-02-06 14:30:38,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:38,466 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 98 transitions. [2025-02-06 14:30:38,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 21 states have internal predecessors, (116), 13 states have call successors, (21), 3 states have call predecessors, (21), 7 states have return successors, (21), 10 states have call predecessors, (21), 12 states have call successors, (21) [2025-02-06 14:30:38,466 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 98 transitions. [2025-02-06 14:30:38,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2025-02-06 14:30:38,467 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:38,467 INFO L218 NwaCegarLoop]: trace histogram [14, 12, 11, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1] [2025-02-06 14:30:38,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:38,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-06 14:30:38,671 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:38,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:38,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1715536077, now seen corresponding path program 6 times [2025-02-06 14:30:38,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:38,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006313393] [2025-02-06 14:30:38,675 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 14:30:38,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:38,682 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 130 statements into 9 equivalence classes. [2025-02-06 14:30:38,690 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 130 of 130 statements. [2025-02-06 14:30:38,690 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-06 14:30:38,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 183 proven. 132 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-02-06 14:30:38,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006313393] [2025-02-06 14:30:38,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006313393] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:38,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87152799] [2025-02-06 14:30:38,786 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 14:30:38,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:38,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:38,787 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:38,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 14:30:38,820 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 130 statements into 9 equivalence classes. [2025-02-06 14:30:38,841 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 130 of 130 statements. [2025-02-06 14:30:38,841 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-06 14:30:38,841 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:38,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-06 14:30:38,843 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 61 proven. 95 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2025-02-06 14:30:39,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:39,761 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 103 proven. 95 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2025-02-06 14:30:39,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87152799] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:39,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:39,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 33 [2025-02-06 14:30:39,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682135807] [2025-02-06 14:30:39,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:39,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-06 14:30:39,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:39,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-06 14:30:39,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2025-02-06 14:30:39,763 INFO L87 Difference]: Start difference. First operand 83 states and 98 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 11 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 23 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-06 14:30:40,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:40,220 INFO L93 Difference]: Finished difference Result 209 states and 273 transitions. [2025-02-06 14:30:40,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-06 14:30:40,220 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 11 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 23 states have call predecessors, (25), 11 states have call successors, (25) Word has length 130 [2025-02-06 14:30:40,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:40,221 INFO L225 Difference]: With dead ends: 209 [2025-02-06 14:30:40,221 INFO L226 Difference]: Without dead ends: 126 [2025-02-06 14:30:40,222 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 231 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2025-02-06 14:30:40,222 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:40,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 131 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-02-06 14:30:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 95. [2025-02-06 14:30:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 74 states have internal predecessors, (80), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (25), 12 states have call predecessors, (25), 10 states have call successors, (25) [2025-02-06 14:30:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2025-02-06 14:30:40,228 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 130 [2025-02-06 14:30:40,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:40,228 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2025-02-06 14:30:40,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 11 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 23 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-06 14:30:40,228 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2025-02-06 14:30:40,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2025-02-06 14:30:40,232 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:40,232 INFO L218 NwaCegarLoop]: trace histogram [48, 45, 39, 24, 24, 24, 24, 23, 23, 23, 23, 23, 22, 22, 22, 21, 15, 9, 1, 1, 1, 1, 1] [2025-02-06 14:30:40,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:40,432 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-06 14:30:40,432 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:40,433 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:40,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1428853946, now seen corresponding path program 7 times [2025-02-06 14:30:40,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:40,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990861100] [2025-02-06 14:30:40,433 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 14:30:40,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:40,441 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 459 statements into 1 equivalence classes. [2025-02-06 14:30:40,457 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 459 of 459 statements. [2025-02-06 14:30:40,457 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:40,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:40,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7510 backedges. 554 proven. 1908 refuted. 0 times theorem prover too weak. 5048 trivial. 0 not checked. [2025-02-06 14:30:40,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:40,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990861100] [2025-02-06 14:30:40,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990861100] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:40,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303777436] [2025-02-06 14:30:40,877 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 14:30:40,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:40,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:40,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:40,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 14:30:40,933 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 459 statements into 1 equivalence classes. [2025-02-06 14:30:40,994 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 459 of 459 statements. [2025-02-06 14:30:40,995 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:40,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:40,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 14:30:41,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7510 backedges. 3899 proven. 1274 refuted. 0 times theorem prover too weak. 2337 trivial. 0 not checked. [2025-02-06 14:30:41,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7510 backedges. 635 proven. 2447 refuted. 0 times theorem prover too weak. 4428 trivial. 0 not checked. [2025-02-06 14:30:42,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303777436] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:42,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:42,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 21] total 26 [2025-02-06 14:30:42,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497658649] [2025-02-06 14:30:42,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:42,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 14:30:42,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:42,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 14:30:42,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2025-02-06 14:30:42,171 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand has 26 states, 26 states have (on average 6.0) internal successors, (156), 26 states have internal predecessors, (156), 21 states have call successors, (28), 4 states have call predecessors, (28), 10 states have return successors, (31), 12 states have call predecessors, (31), 19 states have call successors, (31) [2025-02-06 14:30:42,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:42,454 INFO L93 Difference]: Finished difference Result 227 states and 300 transitions. [2025-02-06 14:30:42,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 14:30:42,454 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.0) internal successors, (156), 26 states have internal predecessors, (156), 21 states have call successors, (28), 4 states have call predecessors, (28), 10 states have return successors, (31), 12 states have call predecessors, (31), 19 states have call successors, (31) Word has length 459 [2025-02-06 14:30:42,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:42,455 INFO L225 Difference]: With dead ends: 227 [2025-02-06 14:30:42,455 INFO L226 Difference]: Without dead ends: 138 [2025-02-06 14:30:42,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 903 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=568, Invalid=1502, Unknown=0, NotChecked=0, Total=2070 [2025-02-06 14:30:42,457 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 178 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:42,457 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 128 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:42,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-02-06 14:30:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2025-02-06 14:30:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 96 states have (on average 1.0625) internal successors, (102), 93 states have internal predecessors, (102), 14 states have call successors, (14), 10 states have call predecessors, (14), 8 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2025-02-06 14:30:42,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2025-02-06 14:30:42,465 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 459 [2025-02-06 14:30:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:42,466 INFO L471 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2025-02-06 14:30:42,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.0) internal successors, (156), 26 states have internal predecessors, (156), 21 states have call successors, (28), 4 states have call predecessors, (28), 10 states have return successors, (31), 12 states have call predecessors, (31), 19 states have call successors, (31) [2025-02-06 14:30:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2025-02-06 14:30:42,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2025-02-06 14:30:42,469 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:42,469 INFO L218 NwaCegarLoop]: trace histogram [28, 26, 23, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 9, 5, 1, 1, 1, 1, 1] [2025-02-06 14:30:42,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 14:30:42,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:42,673 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:42,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1508936707, now seen corresponding path program 8 times [2025-02-06 14:30:42,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:42,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463753910] [2025-02-06 14:30:42,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:42,681 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 268 statements into 2 equivalence classes. [2025-02-06 14:30:42,713 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 268 of 268 statements. [2025-02-06 14:30:42,713 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:42,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 480 proven. 678 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2025-02-06 14:30:42,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:42,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463753910] [2025-02-06 14:30:42,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463753910] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:42,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685486728] [2025-02-06 14:30:42,915 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:42,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:42,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:42,917 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:42,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 14:30:42,967 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 268 statements into 2 equivalence classes. [2025-02-06 14:30:43,002 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 268 of 268 statements. [2025-02-06 14:30:43,002 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:43,002 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:43,003 INFO L256 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 14:30:43,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 1251 proven. 484 refuted. 0 times theorem prover too weak. 743 trivial. 0 not checked. [2025-02-06 14:30:43,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 545 proven. 831 refuted. 0 times theorem prover too weak. 1102 trivial. 0 not checked. [2025-02-06 14:30:44,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685486728] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:44,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:44,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 24 [2025-02-06 14:30:44,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105815857] [2025-02-06 14:30:44,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:44,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 14:30:44,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:44,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 14:30:44,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2025-02-06 14:30:44,354 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 24 states, 24 states have (on average 5.75) internal successors, (138), 24 states have internal predecessors, (138), 18 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (30), 11 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-06 14:30:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:44,616 INFO L93 Difference]: Finished difference Result 232 states and 300 transitions. [2025-02-06 14:30:44,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 14:30:44,616 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.75) internal successors, (138), 24 states have internal predecessors, (138), 18 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (30), 11 states have call predecessors, (30), 18 states have call successors, (30) Word has length 268 [2025-02-06 14:30:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:44,617 INFO L225 Difference]: With dead ends: 232 [2025-02-06 14:30:44,617 INFO L226 Difference]: Without dead ends: 119 [2025-02-06 14:30:44,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 521 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2025-02-06 14:30:44,619 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 67 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:44,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 176 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2025-02-06 14:30:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 107. [2025-02-06 14:30:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 84 states have internal predecessors, (89), 13 states have call successors, (13), 10 states have call predecessors, (13), 7 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2025-02-06 14:30:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2025-02-06 14:30:44,624 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 268 [2025-02-06 14:30:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:44,624 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2025-02-06 14:30:44,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.75) internal successors, (138), 24 states have internal predecessors, (138), 18 states have call successors, (24), 2 states have call predecessors, (24), 10 states have return successors, (30), 11 states have call predecessors, (30), 18 states have call successors, (30) [2025-02-06 14:30:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2025-02-06 14:30:44,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2025-02-06 14:30:44,626 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:44,626 INFO L218 NwaCegarLoop]: trace histogram [52, 50, 42, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 24, 16, 10, 1, 1, 1, 1, 1] [2025-02-06 14:30:44,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:44,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:44,830 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:44,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1956513874, now seen corresponding path program 9 times [2025-02-06 14:30:44,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:44,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16694624] [2025-02-06 14:30:44,830 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:44,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:44,839 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 503 statements into 35 equivalence classes. [2025-02-06 14:30:44,871 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 372 of 503 statements. [2025-02-06 14:30:44,871 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-02-06 14:30:44,871 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1679 proven. 1009 refuted. 0 times theorem prover too weak. 6350 trivial. 0 not checked. [2025-02-06 14:30:45,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:45,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16694624] [2025-02-06 14:30:45,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16694624] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:45,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886761580] [2025-02-06 14:30:45,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:45,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:45,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:45,173 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:45,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 14:30:45,240 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 503 statements into 35 equivalence classes. [2025-02-06 14:30:45,306 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 372 of 503 statements. [2025-02-06 14:30:45,306 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-02-06 14:30:45,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:45,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 14:30:45,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1771 proven. 1024 refuted. 0 times theorem prover too weak. 6243 trivial. 0 not checked. [2025-02-06 14:30:45,404 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1779 proven. 1063 refuted. 0 times theorem prover too weak. 6196 trivial. 0 not checked. [2025-02-06 14:30:46,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886761580] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:46,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:46,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-02-06 14:30:46,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738279383] [2025-02-06 14:30:46,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:46,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 14:30:46,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:46,411 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 14:30:46,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2025-02-06 14:30:46,412 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 13 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) [2025-02-06 14:30:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:46,784 INFO L93 Difference]: Finished difference Result 298 states and 379 transitions. [2025-02-06 14:30:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-02-06 14:30:46,785 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 13 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) Word has length 503 [2025-02-06 14:30:46,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:46,787 INFO L225 Difference]: With dead ends: 298 [2025-02-06 14:30:46,787 INFO L226 Difference]: Without dead ends: 171 [2025-02-06 14:30:46,788 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 997 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=633, Invalid=1719, Unknown=0, NotChecked=0, Total=2352 [2025-02-06 14:30:46,788 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 151 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:46,788 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 163 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:46,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2025-02-06 14:30:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 137. [2025-02-06 14:30:46,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 111 states have (on average 1.045045045045045) internal successors, (116), 108 states have internal predecessors, (116), 17 states have call successors, (17), 14 states have call predecessors, (17), 8 states have return successors, (38), 14 states have call predecessors, (38), 16 states have call successors, (38) [2025-02-06 14:30:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2025-02-06 14:30:46,795 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 503 [2025-02-06 14:30:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:46,796 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2025-02-06 14:30:46,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 13 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) [2025-02-06 14:30:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2025-02-06 14:30:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2025-02-06 14:30:46,797 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:46,798 INFO L218 NwaCegarLoop]: trace histogram [36, 34, 29, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 11, 7, 1, 1, 1, 1, 1] [2025-02-06 14:30:46,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-06 14:30:46,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 14:30:46,998 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:46,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:46,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1546306807, now seen corresponding path program 10 times [2025-02-06 14:30:46,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:46,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745403992] [2025-02-06 14:30:46,999 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:30:46,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:47,006 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 346 statements into 2 equivalence classes. [2025-02-06 14:30:47,013 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 205 of 346 statements. [2025-02-06 14:30:47,013 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 14:30:47,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 780 proven. 1095 refuted. 0 times theorem prover too weak. 2324 trivial. 0 not checked. [2025-02-06 14:30:47,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:47,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745403992] [2025-02-06 14:30:47,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745403992] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:47,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754868269] [2025-02-06 14:30:47,229 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:30:47,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:47,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:47,231 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:47,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 14:30:47,303 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 346 statements into 2 equivalence classes. [2025-02-06 14:30:47,336 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 205 of 346 statements. [2025-02-06 14:30:47,336 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 14:30:47,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:47,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 14:30:47,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 900 proven. 1214 refuted. 0 times theorem prover too weak. 2085 trivial. 0 not checked. [2025-02-06 14:30:47,470 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 900 proven. 1290 refuted. 0 times theorem prover too weak. 2009 trivial. 0 not checked. [2025-02-06 14:30:48,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754868269] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:48,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:48,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-02-06 14:30:48,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603524531] [2025-02-06 14:30:48,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:48,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-06 14:30:48,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:48,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-06 14:30:48,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2025-02-06 14:30:48,716 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand has 28 states, 28 states have (on average 5.357142857142857) internal successors, (150), 28 states have internal predecessors, (150), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-02-06 14:30:48,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:48,981 INFO L93 Difference]: Finished difference Result 286 states and 374 transitions. [2025-02-06 14:30:48,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-06 14:30:48,981 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.357142857142857) internal successors, (150), 28 states have internal predecessors, (150), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) Word has length 346 [2025-02-06 14:30:48,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:48,983 INFO L225 Difference]: With dead ends: 286 [2025-02-06 14:30:48,984 INFO L226 Difference]: Without dead ends: 155 [2025-02-06 14:30:48,985 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 727 GetRequests, 675 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2025-02-06 14:30:48,985 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 103 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:48,986 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 214 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-02-06 14:30:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2025-02-06 14:30:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 116 states have internal predecessors, (122), 19 states have call successors, (19), 16 states have call predecessors, (19), 8 states have return successors, (38), 13 states have call predecessors, (38), 18 states have call successors, (38) [2025-02-06 14:30:48,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 179 transitions. [2025-02-06 14:30:48,996 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 179 transitions. Word has length 346 [2025-02-06 14:30:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:48,996 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 179 transitions. [2025-02-06 14:30:48,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.357142857142857) internal successors, (150), 28 states have internal predecessors, (150), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-02-06 14:30:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 179 transitions. [2025-02-06 14:30:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2025-02-06 14:30:48,998 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:48,999 INFO L218 NwaCegarLoop]: trace histogram [42, 40, 34, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 19, 13, 8, 1, 1, 1, 1, 1] [2025-02-06 14:30:49,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:49,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 14:30:49,199 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:49,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:49,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1282103478, now seen corresponding path program 11 times [2025-02-06 14:30:49,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:49,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072937380] [2025-02-06 14:30:49,200 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 14:30:49,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:49,207 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 405 statements into 30 equivalence classes. [2025-02-06 14:30:49,236 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) and asserted 405 of 405 statements. [2025-02-06 14:30:49,240 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2025-02-06 14:30:49,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 914 proven. 1467 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2025-02-06 14:30:51,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:51,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072937380] [2025-02-06 14:30:51,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072937380] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:51,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384438604] [2025-02-06 14:30:51,126 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 14:30:51,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:51,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:51,128 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:51,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 14:30:51,215 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 405 statements into 30 equivalence classes. [2025-02-06 14:30:51,294 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) and asserted 405 of 405 statements. [2025-02-06 14:30:51,294 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2025-02-06 14:30:51,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:51,296 INFO L256 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-02-06 14:30:51,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3871 trivial. 0 not checked. [2025-02-06 14:30:51,607 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 1149 proven. 1015 refuted. 0 times theorem prover too weak. 3639 trivial. 0 not checked. [2025-02-06 14:30:56,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384438604] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:56,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:56,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 29] total 47 [2025-02-06 14:30:56,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046104834] [2025-02-06 14:30:56,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:56,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-02-06 14:30:56,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:56,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-02-06 14:30:56,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1730, Unknown=0, NotChecked=0, Total=2256 [2025-02-06 14:30:56,673 INFO L87 Difference]: Start difference. First operand 146 states and 179 transitions. Second operand has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 states have internal predecessors, (125), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) [2025-02-06 14:30:56,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:56,801 INFO L93 Difference]: Finished difference Result 177 states and 233 transitions. [2025-02-06 14:30:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-06 14:30:56,802 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 states have internal predecessors, (125), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) Word has length 405 [2025-02-06 14:30:56,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:56,805 INFO L225 Difference]: With dead ends: 177 [2025-02-06 14:30:56,805 INFO L226 Difference]: Without dead ends: 176 [2025-02-06 14:30:56,806 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 893 GetRequests, 788 SyntacticMatches, 55 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=613, Invalid=2039, Unknown=0, NotChecked=0, Total=2652 [2025-02-06 14:30:56,806 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 16 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:56,807 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 174 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2025-02-06 14:30:56,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 167. [2025-02-06 14:30:56,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 132 states have internal predecessors, (139), 21 states have call successors, (21), 16 states have call predecessors, (21), 10 states have return successors, (58), 18 states have call predecessors, (58), 20 states have call successors, (58) [2025-02-06 14:30:56,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 218 transitions. [2025-02-06 14:30:56,816 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 218 transitions. Word has length 405 [2025-02-06 14:30:56,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:56,817 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 218 transitions. [2025-02-06 14:30:56,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 48 states have internal predecessors, (125), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) [2025-02-06 14:30:56,818 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 218 transitions. [2025-02-06 14:30:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 818 [2025-02-06 14:30:56,821 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:56,821 INFO L218 NwaCegarLoop]: trace histogram [84, 82, 68, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 40, 26, 16, 1, 1, 1, 1, 1] [2025-02-06 14:30:56,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:57,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:57,026 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:57,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:57,026 INFO L85 PathProgramCache]: Analyzing trace with hash -291664816, now seen corresponding path program 12 times [2025-02-06 14:30:57,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:57,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538857913] [2025-02-06 14:30:57,026 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 14:30:57,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:57,039 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 817 statements into 60 equivalence classes. [2025-02-06 14:30:57,093 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) and asserted 743 of 817 statements. [2025-02-06 14:30:57,093 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2025-02-06 14:30:57,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:57,680 INFO L134 CoverageAnalysis]: Checked inductivity of 24215 backedges. 3204 proven. 2233 refuted. 0 times theorem prover too weak. 18778 trivial. 0 not checked. [2025-02-06 14:30:57,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:57,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538857913] [2025-02-06 14:30:57,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538857913] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:57,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259574269] [2025-02-06 14:30:57,681 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 14:30:57,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:57,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:57,687 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:57,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 14:30:57,834 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 817 statements into 60 equivalence classes. [2025-02-06 14:30:58,010 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) and asserted 743 of 817 statements. [2025-02-06 14:30:58,010 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2025-02-06 14:30:58,010 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:58,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 14:30:58,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 24215 backedges. 3188 proven. 2246 refuted. 0 times theorem prover too weak. 18781 trivial. 0 not checked. [2025-02-06 14:30:58,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:59,822 INFO L134 CoverageAnalysis]: Checked inductivity of 24215 backedges. 3196 proven. 2310 refuted. 0 times theorem prover too weak. 18709 trivial. 0 not checked. [2025-02-06 14:30:59,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259574269] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:59,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:59,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 21] total 25 [2025-02-06 14:30:59,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078591691] [2025-02-06 14:30:59,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:59,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-06 14:30:59,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:59,825 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-06 14:30:59,826 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2025-02-06 14:30:59,826 INFO L87 Difference]: Start difference. First operand 167 states and 218 transitions. Second operand has 25 states, 25 states have (on average 5.44) internal successors, (136), 25 states have internal predecessors, (136), 13 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 17 states have call predecessors, (27), 13 states have call successors, (27) [2025-02-06 14:31:00,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:31:00,280 INFO L93 Difference]: Finished difference Result 436 states and 597 transitions. [2025-02-06 14:31:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-02-06 14:31:00,280 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.44) internal successors, (136), 25 states have internal predecessors, (136), 13 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 17 states have call predecessors, (27), 13 states have call successors, (27) Word has length 817 [2025-02-06 14:31:00,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:31:00,283 INFO L225 Difference]: With dead ends: 436 [2025-02-06 14:31:00,284 INFO L226 Difference]: Without dead ends: 244 [2025-02-06 14:31:00,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1684 GetRequests, 1624 SyntacticMatches, 10 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=1953, Unknown=0, NotChecked=0, Total=2652 [2025-02-06 14:31:00,286 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 293 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:31:00,286 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 182 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:31:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2025-02-06 14:31:00,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 206. [2025-02-06 14:31:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 168 states have (on average 1.0357142857142858) internal successors, (174), 163 states have internal predecessors, (174), 26 states have call successors, (26), 21 states have call predecessors, (26), 11 states have return successors, (67), 21 states have call predecessors, (67), 25 states have call successors, (67) [2025-02-06 14:31:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 267 transitions. [2025-02-06 14:31:00,308 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 267 transitions. Word has length 817 [2025-02-06 14:31:00,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:31:00,309 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 267 transitions. [2025-02-06 14:31:00,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.44) internal successors, (136), 25 states have internal predecessors, (136), 13 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 17 states have call predecessors, (27), 13 states have call successors, (27) [2025-02-06 14:31:00,310 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 267 transitions. [2025-02-06 14:31:00,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2025-02-06 14:31:00,313 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:31:00,313 INFO L218 NwaCegarLoop]: trace histogram [83, 82, 67, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 40, 26, 16, 1, 1, 1, 1, 1] [2025-02-06 14:31:00,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 14:31:00,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:00,514 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:31:00,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:31:00,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1544852861, now seen corresponding path program 13 times [2025-02-06 14:31:00,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:31:00,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842075051] [2025-02-06 14:31:00,514 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 14:31:00,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:31:00,526 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 811 statements into 1 equivalence classes. [2025-02-06 14:31:00,561 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 811 of 811 statements. [2025-02-06 14:31:00,561 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:31:00,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2257 proven. 4945 refuted. 0 times theorem prover too weak. 16657 trivial. 0 not checked. [2025-02-06 14:31:01,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:31:01,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842075051] [2025-02-06 14:31:01,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842075051] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:31:01,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244876952] [2025-02-06 14:31:01,381 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 14:31:01,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:01,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:31:01,382 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:31:01,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 14:31:01,565 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 811 statements into 1 equivalence classes. [2025-02-06 14:31:01,675 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 811 of 811 statements. [2025-02-06 14:31:01,675 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:31:01,675 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:01,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 1518 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-06 14:31:01,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 12210 proven. 2667 refuted. 0 times theorem prover too weak. 8982 trivial. 0 not checked. [2025-02-06 14:31:01,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:31:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2246 proven. 5308 refuted. 0 times theorem prover too weak. 16305 trivial. 0 not checked. [2025-02-06 14:31:04,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244876952] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:31:04,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:31:04,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 27] total 32 [2025-02-06 14:31:04,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098813416] [2025-02-06 14:31:04,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:31:04,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-06 14:31:04,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:31:04,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-06 14:31:04,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2025-02-06 14:31:04,688 INFO L87 Difference]: Start difference. First operand 206 states and 267 transitions. Second operand has 32 states, 32 states have (on average 5.71875) internal successors, (183), 32 states have internal predecessors, (183), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-02-06 14:31:05,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:31:05,150 INFO L93 Difference]: Finished difference Result 412 states and 552 transitions. [2025-02-06 14:31:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-06 14:31:05,151 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.71875) internal successors, (183), 32 states have internal predecessors, (183), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) Word has length 811 [2025-02-06 14:31:05,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:31:05,153 INFO L225 Difference]: With dead ends: 412 [2025-02-06 14:31:05,153 INFO L226 Difference]: Without dead ends: 212 [2025-02-06 14:31:05,154 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1666 GetRequests, 1605 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2025-02-06 14:31:05,155 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 200 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 14:31:05,155 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 263 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 14:31:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2025-02-06 14:31:05,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 170. [2025-02-06 14:31:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 135 states have internal predecessors, (142), 22 states have call successors, (22), 18 states have call predecessors, (22), 9 states have return successors, (48), 16 states have call predecessors, (48), 21 states have call successors, (48) [2025-02-06 14:31:05,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 212 transitions. [2025-02-06 14:31:05,169 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 212 transitions. Word has length 811 [2025-02-06 14:31:05,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:31:05,170 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 212 transitions. [2025-02-06 14:31:05,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.71875) internal successors, (183), 32 states have internal predecessors, (183), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-02-06 14:31:05,170 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 212 transitions. [2025-02-06 14:31:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1584 [2025-02-06 14:31:05,180 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:31:05,180 INFO L218 NwaCegarLoop]: trace histogram [163, 159, 132, 82, 82, 82, 82, 80, 80, 80, 80, 80, 79, 79, 79, 78, 50, 31, 1, 1, 1, 1, 1] [2025-02-06 14:31:05,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-06 14:31:05,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:05,381 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:31:05,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:31:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1411861211, now seen corresponding path program 14 times [2025-02-06 14:31:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:31:05,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615488047] [2025-02-06 14:31:05,382 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:31:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:31:05,404 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1583 statements into 2 equivalence classes. [2025-02-06 14:31:05,491 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1583 of 1583 statements. [2025-02-06 14:31:05,491 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:31:05,491 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 92020 backedges. 4178 proven. 12329 refuted. 0 times theorem prover too weak. 75513 trivial. 0 not checked. [2025-02-06 14:31:08,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:31:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615488047] [2025-02-06 14:31:08,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615488047] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:31:08,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071335500] [2025-02-06 14:31:08,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:31:08,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:08,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:31:08,318 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:31:08,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-06 14:31:08,527 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1583 statements into 2 equivalence classes. [2025-02-06 14:31:08,722 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1583 of 1583 statements. [2025-02-06 14:31:08,723 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:31:08,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:08,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 2942 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-06 14:31:08,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:08,913 INFO L134 CoverageAnalysis]: Checked inductivity of 92020 backedges. 28995 proven. 10760 refuted. 0 times theorem prover too weak. 52265 trivial. 0 not checked. [2025-02-06 14:31:08,913 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:31:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 92020 backedges. 5079 proven. 14002 refuted. 0 times theorem prover too weak. 72939 trivial. 0 not checked. [2025-02-06 14:31:12,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071335500] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:31:12,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:31:12,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 32] total 37 [2025-02-06 14:31:12,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807092938] [2025-02-06 14:31:12,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:31:12,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-06 14:31:12,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:31:12,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-06 14:31:12,562 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2025-02-06 14:31:12,562 INFO L87 Difference]: Start difference. First operand 170 states and 212 transitions. Second operand has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 32 states have call successors, (39), 5 states have call predecessors, (39), 15 states have return successors, (46), 17 states have call predecessors, (46), 29 states have call successors, (46) [2025-02-06 14:31:13,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:31:13,195 INFO L93 Difference]: Finished difference Result 407 states and 551 transitions. [2025-02-06 14:31:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-06 14:31:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 32 states have call successors, (39), 5 states have call predecessors, (39), 15 states have return successors, (46), 17 states have call predecessors, (46), 29 states have call successors, (46) Word has length 1583 [2025-02-06 14:31:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:31:13,197 INFO L225 Difference]: With dead ends: 407 [2025-02-06 14:31:13,197 INFO L226 Difference]: Without dead ends: 243 [2025-02-06 14:31:13,199 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3242 GetRequests, 3145 SyntacticMatches, 20 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1630 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1530, Invalid=4632, Unknown=0, NotChecked=0, Total=6162 [2025-02-06 14:31:13,200 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 622 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 622 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:31:13,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [622 Valid, 193 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:31:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2025-02-06 14:31:13,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 191. [2025-02-06 14:31:13,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 155 states have (on average 1.032258064516129) internal successors, (160), 152 states have internal predecessors, (160), 25 states have call successors, (25), 20 states have call predecessors, (25), 10 states have return successors, (63), 18 states have call predecessors, (63), 24 states have call successors, (63) [2025-02-06 14:31:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 248 transitions. [2025-02-06 14:31:13,210 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 248 transitions. Word has length 1583 [2025-02-06 14:31:13,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:31:13,210 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 248 transitions. [2025-02-06 14:31:13,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 32 states have call successors, (39), 5 states have call predecessors, (39), 15 states have return successors, (46), 17 states have call predecessors, (46), 29 states have call successors, (46) [2025-02-06 14:31:13,211 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 248 transitions. [2025-02-06 14:31:13,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2025-02-06 14:31:13,215 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:31:13,215 INFO L218 NwaCegarLoop]: trace histogram [94, 92, 76, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 46, 45, 29, 18, 1, 1, 1, 1, 1] [2025-02-06 14:31:13,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 14:31:13,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:13,417 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:31:13,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:31:13,417 INFO L85 PathProgramCache]: Analyzing trace with hash 2067215200, now seen corresponding path program 15 times [2025-02-06 14:31:13,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:31:13,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528722284] [2025-02-06 14:31:13,418 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:31:13,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:31:13,434 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 915 statements into 66 equivalence classes. [2025-02-06 14:31:13,523 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) and asserted 553 of 915 statements. [2025-02-06 14:31:13,523 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2025-02-06 14:31:13,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:13,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30452 backedges. 4481 proven. 1382 refuted. 0 times theorem prover too weak. 24589 trivial. 0 not checked. [2025-02-06 14:31:13,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:31:13,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528722284] [2025-02-06 14:31:13,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528722284] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:31:13,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30904723] [2025-02-06 14:31:13,979 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:31:13,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:13,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:31:13,982 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:31:13,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-06 14:31:14,187 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 915 statements into 66 equivalence classes. [2025-02-06 14:31:14,305 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) and asserted 553 of 915 statements. [2025-02-06 14:31:14,305 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2025-02-06 14:31:14,306 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:14,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 1035 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-06 14:31:14,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30452 backedges. 4680 proven. 1482 refuted. 0 times theorem prover too weak. 24290 trivial. 0 not checked. [2025-02-06 14:31:14,445 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:31:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30452 backedges. 4688 proven. 1545 refuted. 0 times theorem prover too weak. 24219 trivial. 0 not checked. [2025-02-06 14:31:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30904723] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:31:16,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:31:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 21] total 26 [2025-02-06 14:31:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093101027] [2025-02-06 14:31:16,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:31:16,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 14:31:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:31:16,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 14:31:16,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2025-02-06 14:31:16,164 INFO L87 Difference]: Start difference. First operand 191 states and 248 transitions. Second operand has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 14 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (29), 18 states have call predecessors, (29), 14 states have call successors, (29) [2025-02-06 14:31:16,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:31:16,513 INFO L93 Difference]: Finished difference Result 422 states and 552 transitions. [2025-02-06 14:31:16,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-06 14:31:16,514 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 14 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (29), 18 states have call predecessors, (29), 14 states have call successors, (29) Word has length 915 [2025-02-06 14:31:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:31:16,516 INFO L225 Difference]: With dead ends: 422 [2025-02-06 14:31:16,516 INFO L226 Difference]: Without dead ends: 217 [2025-02-06 14:31:16,518 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1871 GetRequests, 1816 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=578, Invalid=1584, Unknown=0, NotChecked=0, Total=2162 [2025-02-06 14:31:16,519 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 155 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:31:16,519 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 185 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:31:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2025-02-06 14:31:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 188. [2025-02-06 14:31:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 150 states have internal predecessors, (156), 25 states have call successors, (25), 20 states have call predecessors, (25), 10 states have return successors, (52), 17 states have call predecessors, (52), 24 states have call successors, (52) [2025-02-06 14:31:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 233 transitions. [2025-02-06 14:31:16,531 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 233 transitions. Word has length 915 [2025-02-06 14:31:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:31:16,532 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 233 transitions. [2025-02-06 14:31:16,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 14 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (29), 18 states have call predecessors, (29), 14 states have call successors, (29) [2025-02-06 14:31:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 233 transitions. [2025-02-06 14:31:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2025-02-06 14:31:16,537 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:31:16,537 INFO L218 NwaCegarLoop]: trace histogram [109, 108, 88, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 53, 34, 21, 1, 1, 1, 1, 1] [2025-02-06 14:31:16,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-06 14:31:16,741 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:16,741 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:31:16,742 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:31:16,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1653235746, now seen corresponding path program 16 times [2025-02-06 14:31:16,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:31:16,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956972480] [2025-02-06 14:31:16,742 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:31:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:31:16,758 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1066 statements into 2 equivalence classes. [2025-02-06 14:31:16,803 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 1066 of 1066 statements. [2025-02-06 14:31:16,803 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 14:31:16,803 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41466 backedges. 6976 proven. 7865 refuted. 0 times theorem prover too weak. 26625 trivial. 0 not checked. [2025-02-06 14:31:31,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:31:31,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956972480] [2025-02-06 14:31:31,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956972480] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:31:31,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157813928] [2025-02-06 14:31:31,534 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:31:31,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:31,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:31:31,536 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:31:31,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-06 14:31:31,761 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1066 statements into 2 equivalence classes. [2025-02-06 14:31:31,899 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 1066 of 1066 statements. [2025-02-06 14:31:31,899 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 14:31:31,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:31,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 1989 conjuncts, 217 conjuncts are in the unsatisfiable core [2025-02-06 14:31:31,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 41466 backedges. 6686 proven. 7855 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2025-02-06 14:31:32,726 INFO L312 TraceCheckSpWp]: Computing backward predicates...