./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Fibonacci05-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci05-overflow.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 7348520f04d4d9b10e62396a3389d8f9a2f3fbd69eb8f1a8953214a9bb54eb76 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 09:59:29,111 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 09:59:29,157 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-02-08 09:59:29,164 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 09:59:29,165 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 09:59:29,188 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 09:59:29,191 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 09:59:29,191 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 09:59:29,191 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 09:59:29,191 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 09:59:29,191 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 09:59:29,191 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 09:59:29,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 09:59:29,191 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 09:59:29,191 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 09:59:29,192 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 09:59:29,192 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 09:59:29,192 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 09:59:29,192 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 09:59:29,193 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 09:59:29,193 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 09:59:29,193 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 09:59:29,193 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 09:59:29,193 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 09:59:29,193 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 09:59:29,193 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 09:59:29,193 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 -> 7348520f04d4d9b10e62396a3389d8f9a2f3fbd69eb8f1a8953214a9bb54eb76 [2025-02-08 09:59:29,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 09:59:29,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 09:59:29,427 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 09:59:29,428 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 09:59:29,429 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 09:59:29,430 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci05-overflow.c [2025-02-08 09:59:30,619 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/de474b3e3/e083a3d1a720472b818121182009c8dd/FLAG0ccfe46f6 [2025-02-08 09:59:30,826 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 09:59:30,828 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci05-overflow.c [2025-02-08 09:59:30,837 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/de474b3e3/e083a3d1a720472b818121182009c8dd/FLAG0ccfe46f6 [2025-02-08 09:59:30,852 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/de474b3e3/e083a3d1a720472b818121182009c8dd [2025-02-08 09:59:30,854 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 09:59:30,855 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 09:59:30,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 09:59:30,857 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 09:59:30,860 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 09:59:30,861 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:30,863 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@140e2cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30, skipping insertion in model container [2025-02-08 09:59:30,863 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:30,872 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 09:59:30,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 09:59:30,978 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 09:59:30,989 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 09:59:30,998 INFO L204 MainTranslator]: Completed translation [2025-02-08 09:59:30,999 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30 WrapperNode [2025-02-08 09:59:30,999 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 09:59:31,000 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 09:59:31,000 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 09:59:31,000 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 09:59:31,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,009 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,018 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2025-02-08 09:59:31,019 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 09:59:31,019 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 09:59:31,020 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 09:59:31,020 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 09:59:31,024 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,024 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,028 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,034 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-08 09:59:31,036 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,037 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,038 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,041 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,041 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,042 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,042 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 09:59:31,043 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 09:59:31,043 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 09:59:31,043 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 09:59:31,044 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (1/1) ... [2025-02-08 09:59:31,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 09:59:31,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:31,074 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) [2025-02-08 09:59:31,082 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 [2025-02-08 09:59:31,099 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-02-08 09:59:31,100 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-02-08 09:59:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 09:59:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 09:59:31,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 09:59:31,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 09:59:31,135 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 09:59:31,137 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 09:59:31,209 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-02-08 09:59:31,236 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-02-08 09:59:31,236 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 09:59:31,242 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 09:59:31,242 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 09:59:31,243 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 09:59:31 BoogieIcfgContainer [2025-02-08 09:59:31,243 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 09:59:31,245 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 09:59:31,245 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 09:59:31,248 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 09:59:31,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 09:59:30" (1/3) ... [2025-02-08 09:59:31,249 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3735a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 09:59:31, skipping insertion in model container [2025-02-08 09:59:31,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:59:30" (2/3) ... [2025-02-08 09:59:31,249 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f3735a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 09:59:31, skipping insertion in model container [2025-02-08 09:59:31,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 09:59:31" (3/3) ... [2025-02-08 09:59:31,254 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci05-overflow.c [2025-02-08 09:59:31,273 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 09:59:31,274 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci05-overflow.c that has 2 procedures, 28 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-02-08 09:59:31,331 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 09:59:31,339 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;@6dd870c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 09:59:31,340 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-02-08 09:59:31,344 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.5625) internal successors, (25), 23 states have internal predecessors, (25), 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) [2025-02-08 09:59:31,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-08 09:59:31,350 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:31,351 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 09:59:31,351 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:31,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:31,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1780270405, now seen corresponding path program 1 times [2025-02-08 09:59:31,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:31,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317060625] [2025-02-08 09:59:31,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:31,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:31,405 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 09:59:31,414 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 09:59:31,415 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:31,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 09:59:31,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:31,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317060625] [2025-02-08 09:59:31,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317060625] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:59:31,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 09:59:31,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 09:59:31,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866242482] [2025-02-08 09:59:31,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:59:31,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 09:59:31,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:31,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 09:59:31,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 09:59:31,508 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.5625) internal successors, (25), 23 states have internal predecessors, (25), 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 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2025-02-08 09:59:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:31,545 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2025-02-08 09:59:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 09:59:31,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2025-02-08 09:59:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:31,552 INFO L225 Difference]: With dead ends: 30 [2025-02-08 09:59:31,552 INFO L226 Difference]: Without dead ends: 23 [2025-02-08 09:59:31,554 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 [2025-02-08 09:59:31,557 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 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 [2025-02-08 09:59:31,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:59:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-08 09:59:31,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2025-02-08 09:59:31,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.4615384615384615) 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) [2025-02-08 09:59:31,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2025-02-08 09:59:31,587 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2025-02-08 09:59:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:31,587 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2025-02-08 09:59:31,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2025-02-08 09:59:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2025-02-08 09:59:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-08 09:59:31,589 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:31,589 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-08 09:59:31,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 09:59:31,589 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:31,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash -646192308, now seen corresponding path program 1 times [2025-02-08 09:59:31,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:31,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769130798] [2025-02-08 09:59:31,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:31,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:31,596 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 09:59:31,607 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 09:59:31,608 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:31,608 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 09:59:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769130798] [2025-02-08 09:59:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769130798] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:59:31,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 09:59:31,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 09:59:31,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372706597] [2025-02-08 09:59:31,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:59:31,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 09:59:31,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:31,680 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 09:59:31,680 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 09:59:31,680 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2025-02-08 09:59:31,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:31,740 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2025-02-08 09:59:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 09:59:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2025-02-08 09:59:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:31,741 INFO L225 Difference]: With dead ends: 23 [2025-02-08 09:59:31,741 INFO L226 Difference]: Without dead ends: 21 [2025-02-08 09:59:31,741 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 09:59:31,742 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:31,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:59:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-08 09:59:31,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2025-02-08 09:59:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 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) [2025-02-08 09:59:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-02-08 09:59:31,748 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2025-02-08 09:59:31,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:31,749 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-02-08 09:59:31,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2025-02-08 09:59:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-02-08 09:59:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-08 09:59:31,749 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:31,749 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 09:59:31,749 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 09:59:31,750 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:31,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:31,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1212560359, now seen corresponding path program 1 times [2025-02-08 09:59:31,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:31,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309637301] [2025-02-08 09:59:31,750 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:31,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:31,755 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 09:59:31,764 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 09:59:31,764 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:31,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 09:59:31,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:31,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309637301] [2025-02-08 09:59:31,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309637301] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:59:31,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 09:59:31,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 09:59:31,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000040132] [2025-02-08 09:59:31,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:59:31,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 09:59:31,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:31,847 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 09:59:31,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 09:59:31,848 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2025-02-08 09:59:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:31,875 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-02-08 09:59:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 09:59:31,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 22 [2025-02-08 09:59:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:31,876 INFO L225 Difference]: With dead ends: 33 [2025-02-08 09:59:31,876 INFO L226 Difference]: Without dead ends: 31 [2025-02-08 09:59:31,876 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 [2025-02-08 09:59:31,877 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:31,877 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 49 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:59:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-08 09:59:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2025-02-08 09:59:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 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) [2025-02-08 09:59:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2025-02-08 09:59:31,891 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 22 [2025-02-08 09:59:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:31,891 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2025-02-08 09:59:31,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2025-02-08 09:59:31,891 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2025-02-08 09:59:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-08 09:59:31,895 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:31,895 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 09:59:31,895 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 09:59:31,895 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:31,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash 406759128, now seen corresponding path program 1 times [2025-02-08 09:59:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:31,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051287987] [2025-02-08 09:59:31,896 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:31,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:31,908 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 09:59:31,921 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 09:59:31,921 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:31,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 09:59:32,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:32,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051287987] [2025-02-08 09:59:32,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051287987] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:32,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621817711] [2025-02-08 09:59:32,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:32,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:32,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:32,058 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) [2025-02-08 09:59:32,059 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 [2025-02-08 09:59:32,082 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 09:59:32,091 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 09:59:32,092 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:32,092 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:32,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 09:59:32,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-08 09:59:32,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-08 09:59:32,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621817711] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:32,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:32,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-02-08 09:59:32,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140126653] [2025-02-08 09:59:32,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:32,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 09:59:32,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:32,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 09:59:32,289 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-02-08 09:59:32,289 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2025-02-08 09:59:32,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:32,479 INFO L93 Difference]: Finished difference Result 89 states and 127 transitions. [2025-02-08 09:59:32,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 09:59:32,479 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 29 [2025-02-08 09:59:32,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:32,480 INFO L225 Difference]: With dead ends: 89 [2025-02-08 09:59:32,480 INFO L226 Difference]: Without dead ends: 63 [2025-02-08 09:59:32,481 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-02-08 09:59:32,482 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:32,482 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 83 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:59:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-08 09:59:32,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2025-02-08 09:59:32,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 40 states have internal predecessors, (41), 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) [2025-02-08 09:59:32,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2025-02-08 09:59:32,489 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 29 [2025-02-08 09:59:32,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:32,490 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2025-02-08 09:59:32,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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) [2025-02-08 09:59:32,490 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2025-02-08 09:59:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-08 09:59:32,491 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:32,491 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 09:59:32,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 09:59:32,695 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 [2025-02-08 09:59:32,695 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:32,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:32,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1746871662, now seen corresponding path program 2 times [2025-02-08 09:59:32,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:32,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519892456] [2025-02-08 09:59:32,696 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:59:32,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:32,701 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-08 09:59:32,704 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 09:59:32,704 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:59:32,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 09:59:32,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:32,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519892456] [2025-02-08 09:59:32,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519892456] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:32,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294914686] [2025-02-08 09:59:32,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:59:32,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:32,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:32,758 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) [2025-02-08 09:59:32,760 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 [2025-02-08 09:59:32,780 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 29 statements into 2 equivalence classes. [2025-02-08 09:59:32,788 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 09:59:32,788 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:59:32,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:32,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 09:59:32,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 09:59:32,823 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 09:59:32,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294914686] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:59:32,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 09:59:32,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2025-02-08 09:59:32,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263427429] [2025-02-08 09:59:32,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:59:32,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 09:59:32,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:32,824 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 09:59:32,824 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-08 09:59:32,825 INFO L87 Difference]: Start difference. First operand 51 states and 66 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 09:59:32,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:32,848 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2025-02-08 09:59:32,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 09:59:32,848 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2025-02-08 09:59:32,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:32,849 INFO L225 Difference]: With dead ends: 58 [2025-02-08 09:59:32,849 INFO L226 Difference]: Without dead ends: 57 [2025-02-08 09:59:32,849 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-02-08 09:59:32,849 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 45 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 [2025-02-08 09:59:32,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 45 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:59:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-02-08 09:59:32,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2025-02-08 09:59:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 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) [2025-02-08 09:59:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2025-02-08 09:59:32,857 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 29 [2025-02-08 09:59:32,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:32,858 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2025-02-08 09:59:32,858 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 09:59:32,858 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2025-02-08 09:59:32,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-02-08 09:59:32,858 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:32,858 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] [2025-02-08 09:59:32,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 09:59:33,063 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 [2025-02-08 09:59:33,063 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:33,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:33,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1681553299, now seen corresponding path program 1 times [2025-02-08 09:59:33,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:33,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644814046] [2025-02-08 09:59:33,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:33,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:33,071 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 09:59:33,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 09:59:33,074 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:33,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 09:59:33,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644814046] [2025-02-08 09:59:33,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644814046] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:33,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705916188] [2025-02-08 09:59:33,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:33,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:33,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:33,121 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) [2025-02-08 09:59:33,125 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 [2025-02-08 09:59:33,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-02-08 09:59:33,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-02-08 09:59:33,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:33,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:33,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 09:59:33,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:33,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 09:59:33,192 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 09:59:33,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705916188] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:59:33,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 09:59:33,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-08 09:59:33,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064736002] [2025-02-08 09:59:33,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:59:33,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 09:59:33,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:33,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 09:59:33,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 09:59:33,194 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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) [2025-02-08 09:59:33,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:33,218 INFO L93 Difference]: Finished difference Result 80 states and 115 transitions. [2025-02-08 09:59:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 09:59:33,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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 30 [2025-02-08 09:59:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:33,220 INFO L225 Difference]: With dead ends: 80 [2025-02-08 09:59:33,220 INFO L226 Difference]: Without dead ends: 79 [2025-02-08 09:59:33,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 09:59:33,221 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 63 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 [2025-02-08 09:59:33,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 63 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:59:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-02-08 09:59:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2025-02-08 09:59:33,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 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) [2025-02-08 09:59:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 85 transitions. [2025-02-08 09:59:33,230 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 85 transitions. Word has length 30 [2025-02-08 09:59:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:33,230 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 85 transitions. [2025-02-08 09:59:33,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 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) [2025-02-08 09:59:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 85 transitions. [2025-02-08 09:59:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-02-08 09:59:33,231 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:33,231 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-02-08 09:59:33,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 09:59:33,433 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 [2025-02-08 09:59:33,433 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:33,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:33,434 INFO L85 PathProgramCache]: Analyzing trace with hash -198942563, now seen corresponding path program 1 times [2025-02-08 09:59:33,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:33,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186905760] [2025-02-08 09:59:33,434 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:33,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:33,438 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-08 09:59:33,445 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-08 09:59:33,447 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:33,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:33,592 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-02-08 09:59:33,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:33,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186905760] [2025-02-08 09:59:33,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186905760] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:33,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898096533] [2025-02-08 09:59:33,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:33,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:33,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:33,594 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) [2025-02-08 09:59:33,596 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 [2025-02-08 09:59:33,614 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-02-08 09:59:33,625 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-02-08 09:59:33,625 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:33,625 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:33,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 09:59:33,627 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-02-08 09:59:33,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-02-08 09:59:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898096533] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:33,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:33,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-02-08 09:59:33,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650108304] [2025-02-08 09:59:33,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:33,814 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 09:59:33,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:33,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 09:59:33,815 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-02-08 09:59:33,815 INFO L87 Difference]: Start difference. First operand 62 states and 85 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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) [2025-02-08 09:59:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:33,945 INFO L93 Difference]: Finished difference Result 139 states and 215 transitions. [2025-02-08 09:59:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 09:59:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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 50 [2025-02-08 09:59:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:33,947 INFO L225 Difference]: With dead ends: 139 [2025-02-08 09:59:33,947 INFO L226 Difference]: Without dead ends: 137 [2025-02-08 09:59:33,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-02-08 09:59:33,948 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:33,948 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 121 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:59:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-02-08 09:59:33,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 96. [2025-02-08 09:59:33,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 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) [2025-02-08 09:59:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 157 transitions. [2025-02-08 09:59:33,960 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 157 transitions. Word has length 50 [2025-02-08 09:59:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:33,961 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 157 transitions. [2025-02-08 09:59:33,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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) [2025-02-08 09:59:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 157 transitions. [2025-02-08 09:59:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2025-02-08 09:59:33,963 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:33,963 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] [2025-02-08 09:59:33,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 09:59:34,164 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 [2025-02-08 09:59:34,164 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:34,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:34,165 INFO L85 PathProgramCache]: Analyzing trace with hash -801003258, now seen corresponding path program 1 times [2025-02-08 09:59:34,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:34,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129807933] [2025-02-08 09:59:34,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:34,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:34,171 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-02-08 09:59:34,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-02-08 09:59:34,179 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:34,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 55 proven. 149 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2025-02-08 09:59:34,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:34,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129807933] [2025-02-08 09:59:34,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129807933] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:34,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042981789] [2025-02-08 09:59:34,289 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:59:34,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:34,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:34,291 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) [2025-02-08 09:59:34,293 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 [2025-02-08 09:59:34,315 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 120 statements into 1 equivalence classes. [2025-02-08 09:59:34,336 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 120 of 120 statements. [2025-02-08 09:59:34,336 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:34,336 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:34,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 09:59:34,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 295 proven. 67 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2025-02-08 09:59:34,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 69 proven. 194 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2025-02-08 09:59:34,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042981789] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:34,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:34,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 13 [2025-02-08 09:59:34,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223182821] [2025-02-08 09:59:34,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:34,603 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 09:59:34,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:34,603 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 09:59:34,603 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-08 09:59:34,603 INFO L87 Difference]: Start difference. First operand 96 states and 157 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 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) [2025-02-08 09:59:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:34,704 INFO L93 Difference]: Finished difference Result 222 states and 399 transitions. [2025-02-08 09:59:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 09:59:34,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 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 120 [2025-02-08 09:59:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:34,706 INFO L225 Difference]: With dead ends: 222 [2025-02-08 09:59:34,706 INFO L226 Difference]: Without dead ends: 128 [2025-02-08 09:59:34,707 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 234 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2025-02-08 09:59:34,708 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:34,708 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 58 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:59:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-02-08 09:59:34,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2025-02-08 09:59:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.0833333333333333) internal successors, (91), 82 states have internal predecessors, (91), 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) [2025-02-08 09:59:34,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 178 transitions. [2025-02-08 09:59:34,721 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 178 transitions. Word has length 120 [2025-02-08 09:59:34,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:34,722 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 178 transitions. [2025-02-08 09:59:34,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 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) [2025-02-08 09:59:34,722 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 178 transitions. [2025-02-08 09:59:34,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2025-02-08 09:59:34,724 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:34,724 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1] [2025-02-08 09:59:34,729 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 [2025-02-08 09:59:34,924 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 [2025-02-08 09:59:34,925 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:34,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:34,925 INFO L85 PathProgramCache]: Analyzing trace with hash 282086323, now seen corresponding path program 2 times [2025-02-08 09:59:34,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:34,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182989077] [2025-02-08 09:59:34,925 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:59:34,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:34,930 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 100 statements into 2 equivalence classes. [2025-02-08 09:59:34,937 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 100 of 100 statements. [2025-02-08 09:59:34,937 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:59:34,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 25 proven. 89 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2025-02-08 09:59:35,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:35,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182989077] [2025-02-08 09:59:35,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182989077] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:35,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978621463] [2025-02-08 09:59:35,020 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:59:35,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:35,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:35,029 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) [2025-02-08 09:59:35,033 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 [2025-02-08 09:59:35,056 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 100 statements into 2 equivalence classes. [2025-02-08 09:59:35,074 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 100 of 100 statements. [2025-02-08 09:59:35,074 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:59:35,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:35,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 09:59:35,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 4 proven. 90 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2025-02-08 09:59:35,145 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 4 proven. 90 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2025-02-08 09:59:35,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978621463] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:35,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:35,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-02-08 09:59:35,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404616857] [2025-02-08 09:59:35,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:35,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 09:59:35,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:35,430 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 09:59:35,430 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-02-08 09:59:35,430 INFO L87 Difference]: Start difference. First operand 108 states and 178 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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) [2025-02-08 09:59:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:35,522 INFO L93 Difference]: Finished difference Result 171 states and 291 transitions. [2025-02-08 09:59:35,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 09:59:35,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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 100 [2025-02-08 09:59:35,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:35,523 INFO L225 Difference]: With dead ends: 171 [2025-02-08 09:59:35,523 INFO L226 Difference]: Without dead ends: 65 [2025-02-08 09:59:35,524 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 188 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2025-02-08 09:59:35,525 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:35,525 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:59:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-08 09:59:35,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2025-02-08 09:59:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 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) [2025-02-08 09:59:35,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2025-02-08 09:59:35,531 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 100 [2025-02-08 09:59:35,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:35,531 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2025-02-08 09:59:35,531 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 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) [2025-02-08 09:59:35,531 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2025-02-08 09:59:35,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2025-02-08 09:59:35,532 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:35,533 INFO L218 NwaCegarLoop]: trace histogram [19, 17, 14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 5, 5, 1, 1, 1] [2025-02-08 09:59:35,538 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 [2025-02-08 09:59:35,733 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 [2025-02-08 09:59:35,734 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:35,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:35,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1366274875, now seen corresponding path program 2 times [2025-02-08 09:59:35,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:35,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269939570] [2025-02-08 09:59:35,734 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:59:35,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:35,740 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 175 statements into 2 equivalence classes. [2025-02-08 09:59:35,751 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 175 of 175 statements. [2025-02-08 09:59:35,751 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:59:35,751 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 100 proven. 280 refuted. 0 times theorem prover too weak. 661 trivial. 0 not checked. [2025-02-08 09:59:35,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:35,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269939570] [2025-02-08 09:59:35,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269939570] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:35,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358858361] [2025-02-08 09:59:35,884 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:59:35,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:35,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:35,886 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) [2025-02-08 09:59:35,887 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 [2025-02-08 09:59:35,914 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 175 statements into 2 equivalence classes. [2025-02-08 09:59:35,941 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 175 of 175 statements. [2025-02-08 09:59:35,941 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:59:35,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:35,942 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 09:59:35,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:35,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 454 proven. 15 refuted. 0 times theorem prover too weak. 572 trivial. 0 not checked. [2025-02-08 09:59:35,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 101 proven. 331 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2025-02-08 09:59:36,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358858361] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:36,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:36,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2025-02-08 09:59:36,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555313247] [2025-02-08 09:59:36,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:36,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 09:59:36,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:36,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 09:59:36,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-08 09:59:36,237 INFO L87 Difference]: Start difference. First operand 61 states and 84 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-02-08 09:59:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:36,320 INFO L93 Difference]: Finished difference Result 113 states and 161 transitions. [2025-02-08 09:59:36,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 09:59:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 175 [2025-02-08 09:59:36,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:36,322 INFO L225 Difference]: With dead ends: 113 [2025-02-08 09:59:36,322 INFO L226 Difference]: Without dead ends: 54 [2025-02-08 09:59:36,323 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 342 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-02-08 09:59:36,323 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:36,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:59:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-08 09:59:36,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-02-08 09:59:36,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 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) [2025-02-08 09:59:36,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2025-02-08 09:59:36,332 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 175 [2025-02-08 09:59:36,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:36,333 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2025-02-08 09:59:36,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-02-08 09:59:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2025-02-08 09:59:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-02-08 09:59:36,334 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:36,334 INFO L218 NwaCegarLoop]: trace histogram [12, 10, 10, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1] [2025-02-08 09:59:36,341 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 [2025-02-08 09:59:36,535 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 [2025-02-08 09:59:36,536 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:36,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash -95215480, now seen corresponding path program 3 times [2025-02-08 09:59:36,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:36,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947309899] [2025-02-08 09:59:36,537 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:59:36,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:36,542 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 109 statements into 10 equivalence classes. [2025-02-08 09:59:36,557 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 101 of 109 statements. [2025-02-08 09:59:36,558 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-08 09:59:36,558 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:36,667 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 132 proven. 84 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2025-02-08 09:59:36,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:36,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947309899] [2025-02-08 09:59:36,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947309899] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:36,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885350178] [2025-02-08 09:59:36,668 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:59:36,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:36,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:36,670 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) [2025-02-08 09:59:36,672 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 [2025-02-08 09:59:36,695 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 109 statements into 10 equivalence classes. [2025-02-08 09:59:36,714 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 101 of 109 statements. [2025-02-08 09:59:36,714 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-08 09:59:36,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:36,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 09:59:36,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 126 proven. 89 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2025-02-08 09:59:36,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:37,009 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 126 proven. 92 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2025-02-08 09:59:37,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885350178] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:37,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:37,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 15 [2025-02-08 09:59:37,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741003877] [2025-02-08 09:59:37,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:37,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 09:59:37,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:37,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 09:59:37,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-02-08 09:59:37,011 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 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) [2025-02-08 09:59:37,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:37,168 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2025-02-08 09:59:37,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-08 09:59:37,168 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 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 109 [2025-02-08 09:59:37,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:37,169 INFO L225 Difference]: With dead ends: 140 [2025-02-08 09:59:37,169 INFO L226 Difference]: Without dead ends: 83 [2025-02-08 09:59:37,170 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 213 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2025-02-08 09:59:37,170 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 81 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:37,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 68 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:59:37,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-02-08 09:59:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2025-02-08 09:59:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.087719298245614) internal successors, (62), 55 states have internal predecessors, (62), 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) [2025-02-08 09:59:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2025-02-08 09:59:37,176 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 109 [2025-02-08 09:59:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:37,176 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2025-02-08 09:59:37,176 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 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) [2025-02-08 09:59:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2025-02-08 09:59:37,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-02-08 09:59:37,177 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:37,177 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1] [2025-02-08 09:59:37,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 09:59:37,377 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 [2025-02-08 09:59:37,378 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:37,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:37,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1374641713, now seen corresponding path program 4 times [2025-02-08 09:59:37,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:37,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616170858] [2025-02-08 09:59:37,378 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:59:37,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:37,382 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-02-08 09:59:37,386 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 55 of 90 statements. [2025-02-08 09:59:37,386 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:59:37,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 96 proven. 48 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2025-02-08 09:59:37,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:37,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616170858] [2025-02-08 09:59:37,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616170858] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:37,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617791524] [2025-02-08 09:59:37,464 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:59:37,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:37,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:37,465 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) [2025-02-08 09:59:37,467 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 [2025-02-08 09:59:37,491 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-02-08 09:59:37,500 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 55 of 90 statements. [2025-02-08 09:59:37,501 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:59:37,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:37,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 09:59:37,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 142 proven. 37 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2025-02-08 09:59:37,548 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 104 proven. 62 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2025-02-08 09:59:37,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617791524] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:37,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:37,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 16 [2025-02-08 09:59:37,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881092236] [2025-02-08 09:59:37,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:37,893 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 09:59:37,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:37,894 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 09:59:37,894 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2025-02-08 09:59:37,894 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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) [2025-02-08 09:59:38,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:38,004 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2025-02-08 09:59:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 09:59:38,005 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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 90 [2025-02-08 09:59:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:38,005 INFO L225 Difference]: With dead ends: 134 [2025-02-08 09:59:38,005 INFO L226 Difference]: Without dead ends: 66 [2025-02-08 09:59:38,006 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 171 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2025-02-08 09:59:38,006 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:38,007 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 79 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:59:38,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-02-08 09:59:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-02-08 09:59:38,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 50 states have internal predecessors, (57), 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) [2025-02-08 09:59:38,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2025-02-08 09:59:38,010 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 90 [2025-02-08 09:59:38,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:38,010 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2025-02-08 09:59:38,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 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) [2025-02-08 09:59:38,011 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2025-02-08 09:59:38,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2025-02-08 09:59:38,011 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:38,011 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1] [2025-02-08 09:59:38,017 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 [2025-02-08 09:59:38,211 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 [2025-02-08 09:59:38,212 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:38,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:38,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1002169325, now seen corresponding path program 5 times [2025-02-08 09:59:38,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:38,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906945315] [2025-02-08 09:59:38,212 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:59:38,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:38,217 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 122 statements into 9 equivalence classes. [2025-02-08 09:59:38,223 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 113 of 122 statements. [2025-02-08 09:59:38,224 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-08 09:59:38,224 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 167 proven. 139 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2025-02-08 09:59:38,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:38,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906945315] [2025-02-08 09:59:38,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906945315] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:38,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518922738] [2025-02-08 09:59:38,349 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:59:38,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:38,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:38,351 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) [2025-02-08 09:59:38,353 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 [2025-02-08 09:59:38,385 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 122 statements into 9 equivalence classes. [2025-02-08 09:59:38,402 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 113 of 122 statements. [2025-02-08 09:59:38,403 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-02-08 09:59:38,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:38,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 09:59:38,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 163 proven. 137 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2025-02-08 09:59:38,472 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 167 proven. 142 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2025-02-08 09:59:38,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518922738] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:38,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:38,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13] total 17 [2025-02-08 09:59:38,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533234828] [2025-02-08 09:59:38,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:38,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-02-08 09:59:38,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:38,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-02-08 09:59:38,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2025-02-08 09:59:38,855 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 11 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (16), 9 states have call predecessors, (16), 11 states have call successors, (16) [2025-02-08 09:59:38,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:38,998 INFO L93 Difference]: Finished difference Result 141 states and 168 transitions. [2025-02-08 09:59:38,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-08 09:59:38,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 11 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (16), 9 states have call predecessors, (16), 11 states have call successors, (16) Word has length 122 [2025-02-08 09:59:38,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:38,999 INFO L225 Difference]: With dead ends: 141 [2025-02-08 09:59:38,999 INFO L226 Difference]: Without dead ends: 79 [2025-02-08 09:59:39,000 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 236 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2025-02-08 09:59:39,000 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 90 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:39,001 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 116 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:59:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-02-08 09:59:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2025-02-08 09:59:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 53 states have internal predecessors, (59), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-08 09:59:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2025-02-08 09:59:39,005 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 122 [2025-02-08 09:59:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:39,005 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2025-02-08 09:59:39,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.176470588235294) internal successors, (88), 17 states have internal predecessors, (88), 11 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (16), 9 states have call predecessors, (16), 11 states have call successors, (16) [2025-02-08 09:59:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2025-02-08 09:59:39,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2025-02-08 09:59:39,007 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:39,007 INFO L218 NwaCegarLoop]: trace histogram [26, 23, 21, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 10, 8, 5, 1, 1, 1] [2025-02-08 09:59:39,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-08 09:59:39,211 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 [2025-02-08 09:59:39,211 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:39,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:39,212 INFO L85 PathProgramCache]: Analyzing trace with hash -620483585, now seen corresponding path program 6 times [2025-02-08 09:59:39,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:39,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510857052] [2025-02-08 09:59:39,212 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:59:39,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:39,221 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 241 statements into 21 equivalence classes. [2025-02-08 09:59:39,236 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 179 of 241 statements. [2025-02-08 09:59:39,237 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-02-08 09:59:39,237 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 446 proven. 483 refuted. 0 times theorem prover too weak. 1100 trivial. 0 not checked. [2025-02-08 09:59:39,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:39,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510857052] [2025-02-08 09:59:39,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510857052] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:39,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730032978] [2025-02-08 09:59:39,456 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:59:39,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:39,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:39,459 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) [2025-02-08 09:59:39,460 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 [2025-02-08 09:59:39,501 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 241 statements into 21 equivalence classes. [2025-02-08 09:59:39,533 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) and asserted 179 of 241 statements. [2025-02-08 09:59:39,533 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2025-02-08 09:59:39,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:39,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 09:59:39,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 439 proven. 489 refuted. 0 times theorem prover too weak. 1101 trivial. 0 not checked. [2025-02-08 09:59:39,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 439 proven. 501 refuted. 0 times theorem prover too weak. 1089 trivial. 0 not checked. [2025-02-08 09:59:40,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730032978] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:40,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:40,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 17] total 24 [2025-02-08 09:59:40,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436672163] [2025-02-08 09:59:40,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:40,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 09:59:40,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:40,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 09:59:40,093 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2025-02-08 09:59:40,093 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 22 states have internal predecessors, (118), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (19), 15 states have call predecessors, (19), 8 states have call successors, (19) [2025-02-08 09:59:40,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:40,410 INFO L93 Difference]: Finished difference Result 214 states and 282 transitions. [2025-02-08 09:59:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 09:59:40,411 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 22 states have internal predecessors, (118), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (19), 15 states have call predecessors, (19), 8 states have call successors, (19) Word has length 241 [2025-02-08 09:59:40,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:40,412 INFO L225 Difference]: With dead ends: 214 [2025-02-08 09:59:40,412 INFO L226 Difference]: Without dead ends: 143 [2025-02-08 09:59:40,413 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 474 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=454, Invalid=1268, Unknown=0, NotChecked=0, Total=1722 [2025-02-08 09:59:40,413 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 316 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:40,414 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 126 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:59:40,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-02-08 09:59:40,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2025-02-08 09:59:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 16 states have call successors, (16), 12 states have call predecessors, (16), 8 states have return successors, (39), 13 states have call predecessors, (39), 15 states have call successors, (39) [2025-02-08 09:59:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2025-02-08 09:59:40,421 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 241 [2025-02-08 09:59:40,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:40,422 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2025-02-08 09:59:40,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 22 states have internal predecessors, (118), 11 states have call successors, (21), 5 states have call predecessors, (21), 7 states have return successors, (19), 15 states have call predecessors, (19), 8 states have call successors, (19) [2025-02-08 09:59:40,422 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2025-02-08 09:59:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2025-02-08 09:59:40,422 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:40,422 INFO L218 NwaCegarLoop]: trace histogram [16, 14, 13, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 1, 1, 1] [2025-02-08 09:59:40,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-08 09:59:40,627 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 [2025-02-08 09:59:40,627 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:40,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:40,628 INFO L85 PathProgramCache]: Analyzing trace with hash -294330925, now seen corresponding path program 7 times [2025-02-08 09:59:40,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:40,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912516064] [2025-02-08 09:59:40,628 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:59:40,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:40,650 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 148 statements into 1 equivalence classes. [2025-02-08 09:59:40,656 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 148 of 148 statements. [2025-02-08 09:59:40,656 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:40,656 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:40,911 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 78 proven. 189 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2025-02-08 09:59:40,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:40,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912516064] [2025-02-08 09:59:40,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912516064] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:40,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974282548] [2025-02-08 09:59:40,912 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:59:40,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:40,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:40,915 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) [2025-02-08 09:59:40,918 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 [2025-02-08 09:59:40,951 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 148 statements into 1 equivalence classes. [2025-02-08 09:59:40,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 148 of 148 statements. [2025-02-08 09:59:40,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:59:40,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:40,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 09:59:40,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:41,102 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2025-02-08 09:59:41,102 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2025-02-08 09:59:42,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974282548] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:42,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:42,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 31 [2025-02-08 09:59:42,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635927248] [2025-02-08 09:59:42,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:42,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-08 09:59:42,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:42,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-08 09:59:42,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2025-02-08 09:59:42,181 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2025-02-08 09:59:42,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:42,388 INFO L93 Difference]: Finished difference Result 151 states and 201 transitions. [2025-02-08 09:59:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-08 09:59:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) Word has length 148 [2025-02-08 09:59:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:42,391 INFO L225 Difference]: With dead ends: 151 [2025-02-08 09:59:42,391 INFO L226 Difference]: Without dead ends: 150 [2025-02-08 09:59:42,393 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 280 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 09:59:42,393 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:42,393 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 186 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:59:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2025-02-08 09:59:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2025-02-08 09:59:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 115 states have internal predecessors, (126), 18 states have call successors, (18), 12 states have call predecessors, (18), 10 states have return successors, (49), 19 states have call predecessors, (49), 17 states have call successors, (49) [2025-02-08 09:59:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2025-02-08 09:59:42,405 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 148 [2025-02-08 09:59:42,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:42,407 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2025-02-08 09:59:42,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.6774193548387095) internal successors, (83), 32 states have internal predecessors, (83), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2025-02-08 09:59:42,407 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2025-02-08 09:59:42,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2025-02-08 09:59:42,410 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:42,410 INFO L218 NwaCegarLoop]: trace histogram [31, 30, 25, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 6, 1, 1, 1] [2025-02-08 09:59:42,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-08 09:59:42,614 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 [2025-02-08 09:59:42,614 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:42,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2091238970, now seen corresponding path program 8 times [2025-02-08 09:59:42,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:42,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709942701] [2025-02-08 09:59:42,615 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:59:42,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:42,635 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 299 statements into 2 equivalence classes. [2025-02-08 09:59:42,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 299 of 299 statements. [2025-02-08 09:59:42,653 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:59:42,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 522 proven. 990 refuted. 0 times theorem prover too weak. 1638 trivial. 0 not checked. [2025-02-08 09:59:42,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709942701] [2025-02-08 09:59:42,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709942701] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776335250] [2025-02-08 09:59:42,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:59:42,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:42,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:42,971 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) [2025-02-08 09:59:42,992 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 [2025-02-08 09:59:43,081 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 299 statements into 2 equivalence classes. [2025-02-08 09:59:43,150 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 299 of 299 statements. [2025-02-08 09:59:43,151 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:59:43,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:43,156 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 09:59:43,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:43,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 1787 proven. 484 refuted. 0 times theorem prover too weak. 879 trivial. 0 not checked. [2025-02-08 09:59:43,423 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 517 proven. 1101 refuted. 0 times theorem prover too weak. 1532 trivial. 0 not checked. [2025-02-08 09:59:44,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776335250] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:44,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:44,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-02-08 09:59:44,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275603686] [2025-02-08 09:59:44,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:44,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 09:59:44,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:44,528 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 09:59:44,528 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2025-02-08 09:59:44,528 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 18 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) [2025-02-08 09:59:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:44,998 INFO L93 Difference]: Finished difference Result 287 states and 398 transitions. [2025-02-08 09:59:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 09:59:44,999 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 18 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) Word has length 299 [2025-02-08 09:59:44,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:45,000 INFO L225 Difference]: With dead ends: 287 [2025-02-08 09:59:45,000 INFO L226 Difference]: Without dead ends: 144 [2025-02-08 09:59:45,001 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 585 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 09:59:45,002 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 73 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:45,002 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 136 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 09:59:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-02-08 09:59:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 135. [2025-02-08 09:59:45,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 106 states have internal predecessors, (114), 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) [2025-02-08 09:59:45,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2025-02-08 09:59:45,017 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 299 [2025-02-08 09:59:45,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:45,017 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2025-02-08 09:59:45,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 18 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) [2025-02-08 09:59:45,017 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2025-02-08 09:59:45,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2025-02-08 09:59:45,025 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:45,025 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] [2025-02-08 09:59:45,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-08 09:59:45,230 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 [2025-02-08 09:59:45,230 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:45,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:45,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1334850661, now seen corresponding path program 9 times [2025-02-08 09:59:45,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:45,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172910107] [2025-02-08 09:59:45,230 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:59:45,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:45,242 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 344 statements into 25 equivalence classes. [2025-02-08 09:59:45,254 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 201 of 344 statements. [2025-02-08 09:59:45,254 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-02-08 09:59:45,255 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:45,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 1091 proven. 374 refuted. 0 times theorem prover too weak. 2734 trivial. 0 not checked. [2025-02-08 09:59:45,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:45,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172910107] [2025-02-08 09:59:45,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172910107] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:45,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405062556] [2025-02-08 09:59:45,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:59:45,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:45,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:45,444 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) [2025-02-08 09:59:45,445 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 [2025-02-08 09:59:45,503 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 344 statements into 25 equivalence classes. [2025-02-08 09:59:45,535 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) and asserted 201 of 344 statements. [2025-02-08 09:59:45,536 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2025-02-08 09:59:45,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:45,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 09:59:45,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 1160 proven. 417 refuted. 0 times theorem prover too weak. 2622 trivial. 0 not checked. [2025-02-08 09:59:45,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:46,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 1164 proven. 447 refuted. 0 times theorem prover too weak. 2588 trivial. 0 not checked. [2025-02-08 09:59:46,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405062556] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:46,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:46,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 24 [2025-02-08 09:59:46,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183302440] [2025-02-08 09:59:46,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:46,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 09:59:46,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:46,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 09:59:46,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2025-02-08 09:59:46,616 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 12 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2025-02-08 09:59:46,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:46,801 INFO L93 Difference]: Finished difference Result 275 states and 350 transitions. [2025-02-08 09:59:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-08 09:59:46,802 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 12 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) Word has length 344 [2025-02-08 09:59:46,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:46,804 INFO L225 Difference]: With dead ends: 275 [2025-02-08 09:59:46,807 INFO L226 Difference]: Without dead ends: 137 [2025-02-08 09:59:46,808 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 674 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 09:59:46,809 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:46,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 115 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:59:46,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-02-08 09:59:46,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2025-02-08 09:59:46,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 104 states have internal predecessors, (110), 17 states have call successors, (17), 14 states have call predecessors, (17), 8 states have return successors, (31), 13 states have call predecessors, (31), 16 states have call successors, (31) [2025-02-08 09:59:46,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2025-02-08 09:59:46,816 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 344 [2025-02-08 09:59:46,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:46,817 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2025-02-08 09:59:46,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 12 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (24), 14 states have call predecessors, (24), 12 states have call successors, (24) [2025-02-08 09:59:46,817 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2025-02-08 09:59:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2025-02-08 09:59:46,820 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:46,821 INFO L218 NwaCegarLoop]: trace histogram [41, 40, 33, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 13, 8, 1, 1, 1] [2025-02-08 09:59:46,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-08 09:59:47,021 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 [2025-02-08 09:59:47,021 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:47,021 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:47,022 INFO L85 PathProgramCache]: Analyzing trace with hash -626892504, now seen corresponding path program 10 times [2025-02-08 09:59:47,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:47,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233978209] [2025-02-08 09:59:47,022 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:59:47,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:47,029 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 397 statements into 2 equivalence classes. [2025-02-08 09:59:47,043 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 397 of 397 statements. [2025-02-08 09:59:47,043 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 09:59:47,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2025-02-08 09:59:48,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:48,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233978209] [2025-02-08 09:59:48,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233978209] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:48,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662255510] [2025-02-08 09:59:48,656 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:59:48,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:48,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:48,658 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) [2025-02-08 09:59:48,686 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 [2025-02-08 09:59:48,760 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 397 statements into 2 equivalence classes. [2025-02-08 09:59:48,829 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 397 of 397 statements. [2025-02-08 09:59:48,830 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 09:59:48,830 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:48,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-02-08 09:59:48,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2025-02-08 09:59:49,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 1149 proven. 1015 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2025-02-08 09:59:54,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662255510] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:54,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:54,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 29] total 40 [2025-02-08 09:59:54,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898313566] [2025-02-08 09:59:54,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:54,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-02-08 09:59:54,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:54,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-02-08 09:59:54,399 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1273, Unknown=0, NotChecked=0, Total=1640 [2025-02-08 09:59:54,400 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand has 41 states, 40 states have (on average 2.6) internal successors, (104), 41 states have internal predecessors, (104), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2025-02-08 09:59:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:54,526 INFO L93 Difference]: Finished difference Result 163 states and 210 transitions. [2025-02-08 09:59:54,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-08 09:59:54,527 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.6) internal successors, (104), 41 states have internal predecessors, (104), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) Word has length 397 [2025-02-08 09:59:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:54,533 INFO L225 Difference]: With dead ends: 163 [2025-02-08 09:59:54,533 INFO L226 Difference]: Without dead ends: 162 [2025-02-08 09:59:54,534 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 772 SyntacticMatches, 62 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=409, Invalid=1483, Unknown=0, NotChecked=0, Total=1892 [2025-02-08 09:59:54,534 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:54,534 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 149 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:59:54,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2025-02-08 09:59:54,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 153. [2025-02-08 09:59:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 123 states have (on average 1.032520325203252) internal successors, (127), 120 states have internal predecessors, (127), 19 states have call successors, (19), 14 states have call predecessors, (19), 10 states have return successors, (49), 18 states have call predecessors, (49), 18 states have call successors, (49) [2025-02-08 09:59:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 195 transitions. [2025-02-08 09:59:54,542 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 195 transitions. Word has length 397 [2025-02-08 09:59:54,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:54,556 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 195 transitions. [2025-02-08 09:59:54,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.6) internal successors, (104), 41 states have internal predecessors, (104), 11 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (28), 28 states have call predecessors, (28), 11 states have call successors, (28) [2025-02-08 09:59:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 195 transitions. [2025-02-08 09:59:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1235 [2025-02-08 09:59:54,563 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:54,563 INFO L218 NwaCegarLoop]: trace histogram [128, 123, 104, 65, 65, 65, 65, 62, 62, 62, 62, 62, 61, 61, 61, 60, 39, 24, 1, 1, 1] [2025-02-08 09:59:54,570 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 [2025-02-08 09:59:54,768 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 [2025-02-08 09:59:54,768 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:54,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash 840846212, now seen corresponding path program 11 times [2025-02-08 09:59:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:54,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384387863] [2025-02-08 09:59:54,769 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:59:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:54,790 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1234 statements into 91 equivalence classes. [2025-02-08 09:59:54,891 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) and asserted 846 of 1234 statements. [2025-02-08 09:59:54,892 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2025-02-08 09:59:54,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:56,152 INFO L134 CoverageAnalysis]: Checked inductivity of 55912 backedges. 7420 proven. 5365 refuted. 0 times theorem prover too weak. 43127 trivial. 0 not checked. [2025-02-08 09:59:56,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:56,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384387863] [2025-02-08 09:59:56,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384387863] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:56,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769758253] [2025-02-08 09:59:56,156 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:59:56,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:56,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:56,157 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) [2025-02-08 09:59:56,161 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 [2025-02-08 09:59:56,313 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1234 statements into 91 equivalence classes. [2025-02-08 09:59:56,504 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) and asserted 846 of 1234 statements. [2025-02-08 09:59:56,504 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 63 check-sat command(s) [2025-02-08 09:59:56,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:56,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 09:59:56,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 55912 backedges. 7388 proven. 5392 refuted. 0 times theorem prover too weak. 43132 trivial. 0 not checked. [2025-02-08 09:59:56,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 10:00:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 55912 backedges. 7383 proven. 5539 refuted. 0 times theorem prover too weak. 42990 trivial. 0 not checked. [2025-02-08 10:00:00,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769758253] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 10:00:00,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 10:00:00,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 30] total 36 [2025-02-08 10:00:00,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202304568] [2025-02-08 10:00:00,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 10:00:00,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-02-08 10:00:00,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 10:00:00,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-02-08 10:00:00,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 10:00:00,030 INFO L87 Difference]: Start difference. First operand 153 states and 195 transitions. Second operand has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 28 states have call successors, (32), 1 states have call predecessors, (32), 14 states have return successors, (41), 16 states have call predecessors, (41), 28 states have call successors, (41) [2025-02-08 10:00:00,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 10:00:00,502 INFO L93 Difference]: Finished difference Result 363 states and 518 transitions. [2025-02-08 10:00:00,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-08 10:00:00,502 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 28 states have call successors, (32), 1 states have call predecessors, (32), 14 states have return successors, (41), 16 states have call predecessors, (41), 28 states have call successors, (41) Word has length 1234 [2025-02-08 10:00:00,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 10:00:00,504 INFO L225 Difference]: With dead ends: 363 [2025-02-08 10:00:00,504 INFO L226 Difference]: Without dead ends: 214 [2025-02-08 10:00:00,506 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2527 GetRequests, 2452 SyntacticMatches, 14 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=967, Invalid=2939, Unknown=0, NotChecked=0, Total=3906 [2025-02-08 10:00:00,506 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 490 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 10:00:00,507 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 164 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 10:00:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2025-02-08 10:00:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 183. [2025-02-08 10:00:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 148 states have (on average 1.0337837837837838) internal successors, (153), 144 states have internal predecessors, (153), 23 states have call successors, (23), 17 states have call predecessors, (23), 11 states have return successors, (64), 21 states have call predecessors, (64), 22 states have call successors, (64) [2025-02-08 10:00:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 240 transitions. [2025-02-08 10:00:00,516 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 240 transitions. Word has length 1234 [2025-02-08 10:00:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 10:00:00,517 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 240 transitions. [2025-02-08 10:00:00,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.277777777777778) internal successors, (190), 36 states have internal predecessors, (190), 28 states have call successors, (32), 1 states have call predecessors, (32), 14 states have return successors, (41), 16 states have call predecessors, (41), 28 states have call successors, (41) [2025-02-08 10:00:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 240 transitions. [2025-02-08 10:00:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2025-02-08 10:00:00,520 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 10:00:00,520 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] [2025-02-08 10:00:00,529 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 [2025-02-08 10:00:00,721 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 [2025-02-08 10:00:00,721 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 10:00:00,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 10:00:00,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1930796604, now seen corresponding path program 12 times [2025-02-08 10:00:00,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 10:00:00,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526668435] [2025-02-08 10:00:00,722 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 10:00:00,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 10:00:00,737 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 809 statements into 60 equivalence classes. [2025-02-08 10:00:00,799 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) and asserted 566 of 809 statements. [2025-02-08 10:00:00,800 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2025-02-08 10:00:00,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 10:00:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 3084 proven. 2837 refuted. 0 times theorem prover too weak. 17938 trivial. 0 not checked. [2025-02-08 10:00:01,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 10:00:01,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526668435] [2025-02-08 10:00:01,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526668435] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 10:00:01,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360248087] [2025-02-08 10:00:01,262 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 10:00:01,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 10:00:01,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 10:00:01,267 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) [2025-02-08 10:00:01,267 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 [2025-02-08 10:00:01,426 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 809 statements into 60 equivalence classes. [2025-02-08 10:00:01,542 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) and asserted 566 of 809 statements. [2025-02-08 10:00:01,542 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 45 check-sat command(s) [2025-02-08 10:00:01,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 10:00:01,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-08 10:00:01,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 10:00:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 3129 proven. 2851 refuted. 0 times theorem prover too weak. 17879 trivial. 0 not checked. [2025-02-08 10:00:01,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 10:00:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 3157 proven. 2907 refuted. 0 times theorem prover too weak. 17795 trivial. 0 not checked. [2025-02-08 10:00:03,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360248087] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 10:00:03,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 10:00:03,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 27 [2025-02-08 10:00:03,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498475467] [2025-02-08 10:00:03,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 10:00:03,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-08 10:00:03,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 10:00:03,673 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-08 10:00:03,673 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2025-02-08 10:00:03,673 INFO L87 Difference]: Start difference. First operand 183 states and 240 transitions. Second operand has 27 states, 27 states have (on average 5.407407407407407) internal successors, (146), 27 states have internal predecessors, (146), 16 states have call successors, (24), 1 states have call predecessors, (24), 12 states have return successors, (31), 17 states have call predecessors, (31), 16 states have call successors, (31) [2025-02-08 10:00:04,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 10:00:04,141 INFO L93 Difference]: Finished difference Result 400 states and 538 transitions. [2025-02-08 10:00:04,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-08 10:00:04,142 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.407407407407407) internal successors, (146), 27 states have internal predecessors, (146), 16 states have call successors, (24), 1 states have call predecessors, (24), 12 states have return successors, (31), 17 states have call predecessors, (31), 16 states have call successors, (31) Word has length 809 [2025-02-08 10:00:04,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 10:00:04,144 INFO L225 Difference]: With dead ends: 400 [2025-02-08 10:00:04,145 INFO L226 Difference]: Without dead ends: 221 [2025-02-08 10:00:04,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1659 GetRequests, 1604 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=527, Invalid=1543, Unknown=0, NotChecked=0, Total=2070 [2025-02-08 10:00:04,147 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 189 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 10:00:04,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 250 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 10:00:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2025-02-08 10:00:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 165. [2025-02-08 10:00:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 131 states have internal predecessors, (137), 22 states have call successors, (22), 17 states have call predecessors, (22), 9 states have return successors, (43), 16 states have call predecessors, (43), 21 states have call successors, (43) [2025-02-08 10:00:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 202 transitions. [2025-02-08 10:00:04,163 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 202 transitions. Word has length 809 [2025-02-08 10:00:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 10:00:04,164 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 202 transitions. [2025-02-08 10:00:04,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.407407407407407) internal successors, (146), 27 states have internal predecessors, (146), 16 states have call successors, (24), 1 states have call predecessors, (24), 12 states have return successors, (31), 17 states have call predecessors, (31), 16 states have call successors, (31) [2025-02-08 10:00:04,164 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 202 transitions. [2025-02-08 10:00:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1739 [2025-02-08 10:00:04,184 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 10:00:04,184 INFO L218 NwaCegarLoop]: trace histogram [179, 175, 145, 90, 90, 90, 90, 88, 88, 88, 88, 88, 87, 87, 87, 86, 55, 34, 1, 1, 1] [2025-02-08 10:00:04,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-08 10:00:04,388 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 [2025-02-08 10:00:04,390 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 10:00:04,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 10:00:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1536728750, now seen corresponding path program 13 times [2025-02-08 10:00:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 10:00:04,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405764280] [2025-02-08 10:00:04,391 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 10:00:04,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 10:00:04,412 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1738 statements into 1 equivalence classes. [2025-02-08 10:00:04,515 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1738 of 1738 statements. [2025-02-08 10:00:04,515 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 10:00:04,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 10:00:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 111302 backedges. 4478 proven. 14460 refuted. 0 times theorem prover too weak. 92364 trivial. 0 not checked. [2025-02-08 10:00:07,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 10:00:07,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405764280] [2025-02-08 10:00:07,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405764280] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 10:00:07,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575708992] [2025-02-08 10:00:07,897 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 10:00:07,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 10:00:07,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 10:00:07,899 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) [2025-02-08 10:00:07,900 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 [2025-02-08 10:00:08,099 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1738 statements into 1 equivalence classes. [2025-02-08 10:00:08,324 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1738 of 1738 statements. [2025-02-08 10:00:08,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 10:00:08,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 10:00:08,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 3231 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-08 10:00:08,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 10:00:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 111302 backedges. 44877 proven. 10901 refuted. 0 times theorem prover too weak. 55524 trivial. 0 not checked. [2025-02-08 10:00:08,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 10:00:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 111302 backedges. 5417 proven. 16369 refuted. 0 times theorem prover too weak. 89516 trivial. 0 not checked. [2025-02-08 10:00:12,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575708992] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 10:00:12,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 10:00:12,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 33] total 38 [2025-02-08 10:00:12,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953510103] [2025-02-08 10:00:12,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 10:00:12,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-08 10:00:12,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 10:00:12,849 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-08 10:00:12,850 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2025-02-08 10:00:12,851 INFO L87 Difference]: Start difference. First operand 165 states and 202 transitions. Second operand has 38 states, 38 states have (on average 5.947368421052632) internal successors, (226), 38 states have internal predecessors, (226), 33 states have call successors, (40), 4 states have call predecessors, (40), 16 states have return successors, (49), 18 states have call predecessors, (49), 31 states have call successors, (49) [2025-02-08 10:00:13,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 10:00:13,560 INFO L93 Difference]: Finished difference Result 392 states and 522 transitions. [2025-02-08 10:00:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-02-08 10:00:13,561 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.947368421052632) internal successors, (226), 38 states have internal predecessors, (226), 33 states have call successors, (40), 4 states have call predecessors, (40), 16 states have return successors, (49), 18 states have call predecessors, (49), 31 states have call successors, (49) Word has length 1738 [2025-02-08 10:00:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 10:00:13,564 INFO L225 Difference]: With dead ends: 392 [2025-02-08 10:00:13,564 INFO L226 Difference]: Without dead ends: 231 [2025-02-08 10:00:13,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3553 GetRequests, 3454 SyntacticMatches, 19 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1599, Invalid=5043, Unknown=0, NotChecked=0, Total=6642 [2025-02-08 10:00:13,567 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 703 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 10:00:13,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 192 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 10:00:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2025-02-08 10:00:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 198. [2025-02-08 10:00:13,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 160 states have (on average 1.03125) internal successors, (165), 158 states have internal predecessors, (165), 27 states have call successors, (27), 22 states have call predecessors, (27), 10 states have return successors, (54), 17 states have call predecessors, (54), 26 states have call successors, (54) [2025-02-08 10:00:13,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 246 transitions. [2025-02-08 10:00:13,581 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 246 transitions. Word has length 1738 [2025-02-08 10:00:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 10:00:13,582 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 246 transitions. [2025-02-08 10:00:13,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.947368421052632) internal successors, (226), 38 states have internal predecessors, (226), 33 states have call successors, (40), 4 states have call predecessors, (40), 16 states have return successors, (49), 18 states have call predecessors, (49), 31 states have call successors, (49) [2025-02-08 10:00:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 246 transitions. [2025-02-08 10:00:13,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1071 [2025-02-08 10:00:13,624 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 10:00:13,624 INFO L218 NwaCegarLoop]: trace histogram [110, 108, 89, 55, 55, 55, 55, 54, 54, 54, 54, 54, 54, 54, 54, 53, 34, 21, 1, 1, 1] [2025-02-08 10:00:13,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-02-08 10:00:13,828 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 [2025-02-08 10:00:13,828 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 10:00:13,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 10:00:13,830 INFO L85 PathProgramCache]: Analyzing trace with hash 950076881, now seen corresponding path program 14 times [2025-02-08 10:00:13,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 10:00:13,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731629390] [2025-02-08 10:00:13,830 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 10:00:13,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 10:00:13,846 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1070 statements into 2 equivalence classes. [2025-02-08 10:00:13,901 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1070 of 1070 statements. [2025-02-08 10:00:13,901 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 10:00:13,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 10:00:29,101 INFO L134 CoverageAnalysis]: Checked inductivity of 41934 backedges. 6794 proven. 10267 refuted. 0 times theorem prover too weak. 24873 trivial. 0 not checked. [2025-02-08 10:00:29,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 10:00:29,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731629390] [2025-02-08 10:00:29,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731629390] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 10:00:29,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920300938] [2025-02-08 10:00:29,102 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 10:00:29,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 10:00:29,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 10:00:29,105 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) [2025-02-08 10:00:29,105 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 [2025-02-08 10:00:29,304 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1070 statements into 2 equivalence classes. [2025-02-08 10:00:29,500 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1070 of 1070 statements. [2025-02-08 10:00:29,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 10:00:29,501 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 10:00:29,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 1998 conjuncts, 217 conjuncts are in the unsatisfiable core [2025-02-08 10:00:29,530 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 10:00:30,235 INFO L134 CoverageAnalysis]: Checked inductivity of 41934 backedges. 6686 proven. 7855 refuted. 0 times theorem prover too weak. 27393 trivial. 0 not checked. [2025-02-08 10:00:30,235 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 10:01:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41934 backedges. 7863 proven. 7392 refuted. 0 times theorem prover too weak. 26679 trivial. 0 not checked. [2025-02-08 10:01:04,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920300938] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 10:01:04,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 10:01:04,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 41] total 59 [2025-02-08 10:01:04,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045052912] [2025-02-08 10:01:04,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 10:01:04,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-02-08 10:01:04,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 10:01:04,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-02-08 10:01:04,137 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=2770, Unknown=0, NotChecked=0, Total=3540 [2025-02-08 10:01:04,138 INFO L87 Difference]: Start difference. First operand 198 states and 246 transitions. Second operand has 60 states, 59 states have (on average 2.559322033898305) internal successors, (151), 60 states have internal predecessors, (151), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) [2025-02-08 10:01:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 10:01:04,306 INFO L93 Difference]: Finished difference Result 229 states and 302 transitions. [2025-02-08 10:01:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-08 10:01:04,306 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.559322033898305) internal successors, (151), 60 states have internal predecessors, (151), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) Word has length 1070 [2025-02-08 10:01:04,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 10:01:04,308 INFO L225 Difference]: With dead ends: 229 [2025-02-08 10:01:04,308 INFO L226 Difference]: Without dead ends: 228 [2025-02-08 10:01:04,310 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2359 GetRequests, 2137 SyntacticMatches, 160 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7611 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=871, Invalid=3161, Unknown=0, NotChecked=0, Total=4032 [2025-02-08 10:01:04,310 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 10:01:04,311 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 215 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 10:01:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2025-02-08 10:01:04,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 219. [2025-02-08 10:01:04,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 174 states have internal predecessors, (182), 29 states have call successors, (29), 22 states have call predecessors, (29), 12 states have return successors, (76), 22 states have call predecessors, (76), 28 states have call successors, (76) [2025-02-08 10:01:04,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 287 transitions. [2025-02-08 10:01:04,328 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 287 transitions. Word has length 1070 [2025-02-08 10:01:04,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 10:01:04,329 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 287 transitions. [2025-02-08 10:01:04,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.559322033898305) internal successors, (151), 60 states have internal predecessors, (151), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) [2025-02-08 10:01:04,330 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 287 transitions. [2025-02-08 10:01:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3230 [2025-02-08 10:01:04,366 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 10:01:04,366 INFO L218 NwaCegarLoop]: trace histogram [331, 327, 268, 166, 166, 166, 166, 164, 164, 164, 164, 164, 163, 163, 163, 162, 102, 63, 1, 1, 1] [2025-02-08 10:01:04,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-08 10:01:04,571 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 [2025-02-08 10:01:04,572 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 10:01:04,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 10:01:04,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1163161755, now seen corresponding path program 15 times [2025-02-08 10:01:04,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 10:01:04,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942369599] [2025-02-08 10:01:04,573 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 10:01:04,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 10:01:04,616 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 3229 statements into 241 equivalence classes. [2025-02-08 10:01:04,943 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 172 check-sat command(s) and asserted 2275 of 3229 statements. [2025-02-08 10:01:04,943 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 172 check-sat command(s) [2025-02-08 10:01:04,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat