./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Fibonacci04-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/Fibonacci04-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 a4783e070fd2491b45504d9f6f3060ee7c5288027d9d113e851641208eae29b1 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 09:58:20,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 09:58:20,970 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-02-08 09:58:20,976 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 09:58:20,976 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 09:58:20,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 09:58:21,000 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 09:58:21,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 09:58:21,000 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 09:58:21,001 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 09:58:21,001 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 09:58:21,001 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 09:58:21,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 09:58:21,001 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 09:58:21,001 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 09:58:21,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 09:58:21,001 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 09:58:21,001 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 09:58:21,001 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 09:58:21,001 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 09:58:21,002 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 09:58:21,002 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 09:58:21,002 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 09:58:21,003 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 09:58:21,003 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 09:58:21,003 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 09:58:21,003 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 09:58:21,003 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 09:58:21,003 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 09:58:21,003 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 09:58:21,003 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 09:58:21,003 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 -> a4783e070fd2491b45504d9f6f3060ee7c5288027d9d113e851641208eae29b1 [2025-02-08 09:58:21,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 09:58:21,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 09:58:21,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 09:58:21,254 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 09:58:21,254 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 09:58:21,255 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci04-overflow.c [2025-02-08 09:58:22,403 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/697ce844c/5941f1c0a49b46d88dc944c2273779f1/FLAG933b2a7d7 [2025-02-08 09:58:22,621 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 09:58:22,621 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci04-overflow.c [2025-02-08 09:58:22,628 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/697ce844c/5941f1c0a49b46d88dc944c2273779f1/FLAG933b2a7d7 [2025-02-08 09:58:22,643 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/697ce844c/5941f1c0a49b46d88dc944c2273779f1 [2025-02-08 09:58:22,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 09:58:22,647 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 09:58:22,649 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 09:58:22,649 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 09:58:22,653 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 09:58:22,654 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,656 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5373cd37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22, skipping insertion in model container [2025-02-08 09:58:22,656 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,667 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 09:58:22,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 09:58:22,781 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 09:58:22,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 09:58:22,805 INFO L204 MainTranslator]: Completed translation [2025-02-08 09:58:22,805 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22 WrapperNode [2025-02-08 09:58:22,805 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 09:58:22,806 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 09:58:22,807 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 09:58:22,807 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 09:58:22,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,828 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2025-02-08 09:58:22,829 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 09:58:22,829 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 09:58:22,830 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 09:58:22,830 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 09:58:22,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,838 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,847 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 09:58:22,851 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,851 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,853 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,856 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,856 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,857 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,857 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 09:58:22,858 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 09:58:22,858 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 09:58:22,858 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 09:58:22,859 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (1/1) ... [2025-02-08 09:58:22,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 09:58:22,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:22,884 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 09:58:22,886 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 09:58:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-02-08 09:58:22,902 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-02-08 09:58:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 09:58:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 09:58:22,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 09:58:22,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 09:58:22,936 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 09:58:22,937 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 09:58:23,014 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L24: havoc #t~ret4;havoc #t~ret5; [2025-02-08 09:58:23,039 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2025-02-08 09:58:23,040 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 09:58:23,047 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 09:58:23,048 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 09:58:23,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 09:58:23 BoogieIcfgContainer [2025-02-08 09:58:23,048 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 09:58:23,050 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 09:58:23,050 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 09:58:23,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 09:58:23,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 09:58:22" (1/3) ... [2025-02-08 09:58:23,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748e1918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 09:58:23, skipping insertion in model container [2025-02-08 09:58:23,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 09:58:22" (2/3) ... [2025-02-08 09:58:23,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@748e1918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 09:58:23, skipping insertion in model container [2025-02-08 09:58:23,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 09:58:23" (3/3) ... [2025-02-08 09:58:23,055 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci04-overflow.c [2025-02-08 09:58:23,065 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 09:58:23,067 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci04-overflow.c that has 2 procedures, 28 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-02-08 09:58:23,101 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 09:58:23,112 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;@7168adfa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 09:58:23,112 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-02-08 09:58:23,115 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 09:58:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-02-08 09:58:23,119 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:23,119 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 09:58:23,120 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:23,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:23,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1780270405, now seen corresponding path program 1 times [2025-02-08 09:58:23,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113638939] [2025-02-08 09:58:23,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:23,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 09:58:23,181 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 09:58:23,181 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:23,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:23,247 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 09:58:23,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113638939] [2025-02-08 09:58:23,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113638939] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:58:23,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 09:58:23,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 09:58:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960060105] [2025-02-08 09:58:23,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:58:23,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 09:58:23,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:23,268 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 09:58:23,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 09:58:23,270 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 09:58:23,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:23,314 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2025-02-08 09:58:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 09:58:23,316 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 09:58:23,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:23,322 INFO L225 Difference]: With dead ends: 30 [2025-02-08 09:58:23,322 INFO L226 Difference]: Without dead ends: 23 [2025-02-08 09:58:23,324 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 09:58:23,328 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 09:58:23,330 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 09:58:23,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-08 09:58:23,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2025-02-08 09:58:23,357 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 09:58:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2025-02-08 09:58:23,363 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2025-02-08 09:58:23,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:23,363 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2025-02-08 09:58:23,363 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 09:58:23,363 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2025-02-08 09:58:23,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-08 09:58:23,364 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:23,364 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-08 09:58:23,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 09:58:23,364 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:23,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:23,365 INFO L85 PathProgramCache]: Analyzing trace with hash -646192308, now seen corresponding path program 1 times [2025-02-08 09:58:23,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:23,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784611527] [2025-02-08 09:58:23,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:23,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:23,371 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-08 09:58:23,381 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-08 09:58:23,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:23,386 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:23,460 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 09:58:23,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:23,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784611527] [2025-02-08 09:58:23,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784611527] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:58:23,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 09:58:23,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-08 09:58:23,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132371080] [2025-02-08 09:58:23,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:58:23,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 09:58:23,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:23,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 09:58:23,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 09:58:23,463 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 09:58:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:23,522 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2025-02-08 09:58:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 09:58:23,522 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 09:58:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:23,523 INFO L225 Difference]: With dead ends: 23 [2025-02-08 09:58:23,523 INFO L226 Difference]: Without dead ends: 21 [2025-02-08 09:58:23,523 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 09:58:23,524 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 09:58:23,524 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 09:58:23,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-02-08 09:58:23,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2025-02-08 09:58:23,531 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 09:58:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-02-08 09:58:23,532 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2025-02-08 09:58:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:23,533 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-02-08 09:58:23,533 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 09:58:23,533 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-02-08 09:58:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2025-02-08 09:58:23,534 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:23,534 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 09:58:23,534 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 09:58:23,534 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:23,535 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:23,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1212560359, now seen corresponding path program 1 times [2025-02-08 09:58:23,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:23,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299418049] [2025-02-08 09:58:23,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:23,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:23,542 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-08 09:58:23,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-08 09:58:23,549 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:23,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:23,648 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 09:58:23,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:23,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299418049] [2025-02-08 09:58:23,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299418049] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:58:23,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 09:58:23,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 09:58:23,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618845323] [2025-02-08 09:58:23,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:58:23,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 09:58:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:23,650 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 09:58:23,650 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 09:58:23,650 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 09:58:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:23,676 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-02-08 09:58:23,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 09:58:23,677 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 09:58:23,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:23,677 INFO L225 Difference]: With dead ends: 33 [2025-02-08 09:58:23,677 INFO L226 Difference]: Without dead ends: 31 [2025-02-08 09:58:23,678 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 09:58:23,678 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 09:58:23,678 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 09:58:23,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-02-08 09:58:23,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2025-02-08 09:58:23,682 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 09:58:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2025-02-08 09:58:23,683 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 22 [2025-02-08 09:58:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:23,683 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2025-02-08 09:58:23,683 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 09:58:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2025-02-08 09:58:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-08 09:58:23,684 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:23,684 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 09:58:23,684 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 09:58:23,685 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:23,688 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:23,688 INFO L85 PathProgramCache]: Analyzing trace with hash 406759128, now seen corresponding path program 1 times [2025-02-08 09:58:23,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:23,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361561589] [2025-02-08 09:58:23,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:23,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:23,697 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 09:58:23,702 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 09:58:23,703 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:23,703 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:23,834 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 09:58:23,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:23,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361561589] [2025-02-08 09:58:23,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361561589] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:23,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173444828] [2025-02-08 09:58:23,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:23,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:23,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:23,837 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 09:58:23,839 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 09:58:23,862 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 09:58:23,876 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 09:58:23,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:23,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:23,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 09:58:23,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:23,956 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 09:58:23,957 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:24,094 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 09:58:24,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173444828] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:24,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:24,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-02-08 09:58:24,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916888461] [2025-02-08 09:58:24,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:24,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 09:58:24,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:24,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 09:58:24,096 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-02-08 09:58:24,096 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 09:58:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:24,332 INFO L93 Difference]: Finished difference Result 89 states and 127 transitions. [2025-02-08 09:58:24,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 09:58:24,332 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 09:58:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:24,333 INFO L225 Difference]: With dead ends: 89 [2025-02-08 09:58:24,333 INFO L226 Difference]: Without dead ends: 63 [2025-02-08 09:58:24,334 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 09:58:24,334 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:24,334 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 83 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:58:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-08 09:58:24,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2025-02-08 09:58:24,346 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 09:58:24,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2025-02-08 09:58:24,348 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 29 [2025-02-08 09:58:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:24,348 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2025-02-08 09:58:24,348 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 09:58:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2025-02-08 09:58:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-02-08 09:58:24,349 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:24,349 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 09:58:24,355 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 09:58:24,549 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 09:58:24,549 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:24,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash -535409854, now seen corresponding path program 2 times [2025-02-08 09:58:24,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:24,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916500668] [2025-02-08 09:58:24,550 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:58:24,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:24,556 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 09:58:24,562 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 09:58:24,562 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:58:24,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 09:58:24,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:24,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916500668] [2025-02-08 09:58:24,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916500668] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:24,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024606736] [2025-02-08 09:58:24,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:58:24,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:24,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:24,660 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 09:58:24,662 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 09:58:24,683 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-02-08 09:58:24,691 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-02-08 09:58:24,691 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:58:24,691 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:24,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 09:58:24,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:24,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 09:58:24,728 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 09:58:24,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024606736] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:58:24,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 09:58:24,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-02-08 09:58:24,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138981866] [2025-02-08 09:58:24,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:58:24,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 09:58:24,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:24,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 09:58:24,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 09:58:24,730 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 09:58:24,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:24,752 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2025-02-08 09:58:24,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 09:58:24,753 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 23 [2025-02-08 09:58:24,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:24,753 INFO L225 Difference]: With dead ends: 58 [2025-02-08 09:58:24,753 INFO L226 Difference]: Without dead ends: 57 [2025-02-08 09:58:24,754 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 09:58:24,754 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 09:58:24,754 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 09:58:24,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-02-08 09:58:24,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2025-02-08 09:58:24,760 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 09:58:24,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2025-02-08 09:58:24,761 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 23 [2025-02-08 09:58:24,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:24,761 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2025-02-08 09:58:24,761 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 09:58:24,761 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2025-02-08 09:58:24,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-08 09:58:24,761 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:24,761 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 09:58:24,767 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 09:58:24,966 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 09:58:24,966 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:24,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:24,966 INFO L85 PathProgramCache]: Analyzing trace with hash 582163683, now seen corresponding path program 1 times [2025-02-08 09:58:24,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:24,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778049651] [2025-02-08 09:58:24,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:24,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:24,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 09:58:24,972 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 09:58:24,972 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:24,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 09:58:25,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:25,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778049651] [2025-02-08 09:58:25,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778049651] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:25,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144547903] [2025-02-08 09:58:25,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:25,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:25,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:25,041 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 09:58:25,042 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 09:58:25,057 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 09:58:25,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 09:58:25,064 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:25,064 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:25,065 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 09:58:25,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 09:58:25,104 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 09:58:25,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144547903] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 09:58:25,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 09:58:25,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-08 09:58:25,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972452948] [2025-02-08 09:58:25,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 09:58:25,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 09:58:25,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:25,105 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 09:58:25,105 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 09:58:25,105 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 09:58:25,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:25,139 INFO L93 Difference]: Finished difference Result 80 states and 115 transitions. [2025-02-08 09:58:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 09:58:25,140 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 24 [2025-02-08 09:58:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:25,142 INFO L225 Difference]: With dead ends: 80 [2025-02-08 09:58:25,142 INFO L226 Difference]: Without dead ends: 79 [2025-02-08 09:58:25,142 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 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 09:58:25,142 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:25,142 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 75 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:58:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-02-08 09:58:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2025-02-08 09:58:25,157 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 09:58:25,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 85 transitions. [2025-02-08 09:58:25,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 85 transitions. Word has length 24 [2025-02-08 09:58:25,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:25,159 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 85 transitions. [2025-02-08 09:58:25,159 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 09:58:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 85 transitions. [2025-02-08 09:58:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2025-02-08 09:58:25,160 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:25,160 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-02-08 09:58:25,167 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 09:58:25,361 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 09:58:25,361 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:25,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1285897709, now seen corresponding path program 1 times [2025-02-08 09:58:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:25,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807386344] [2025-02-08 09:58:25,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:25,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:25,365 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-08 09:58:25,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 09:58:25,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:25,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-08 09:58:25,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807386344] [2025-02-08 09:58:25,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807386344] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:25,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783569351] [2025-02-08 09:58:25,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:25,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:25,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:25,477 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 09:58:25,478 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 09:58:25,498 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 44 statements into 1 equivalence classes. [2025-02-08 09:58:25,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 44 of 44 statements. [2025-02-08 09:58:25,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:25,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:25,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 09:58:25,512 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:25,587 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-08 09:58:25,587 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-08 09:58:25,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783569351] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:25,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:25,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-02-08 09:58:25,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158986895] [2025-02-08 09:58:25,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:25,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 09:58:25,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:25,751 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 09:58:25,751 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-02-08 09:58:25,752 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 09:58:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:25,921 INFO L93 Difference]: Finished difference Result 139 states and 215 transitions. [2025-02-08 09:58:25,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 09:58:25,922 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 44 [2025-02-08 09:58:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:25,924 INFO L225 Difference]: With dead ends: 139 [2025-02-08 09:58:25,924 INFO L226 Difference]: Without dead ends: 137 [2025-02-08 09:58:25,924 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-02-08 09:58:25,925 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 16 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:25,925 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 111 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:58:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-02-08 09:58:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 96. [2025-02-08 09:58:25,939 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 09:58:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 157 transitions. [2025-02-08 09:58:25,941 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 157 transitions. Word has length 44 [2025-02-08 09:58:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:25,941 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 157 transitions. [2025-02-08 09:58:25,941 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 09:58:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 157 transitions. [2025-02-08 09:58:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2025-02-08 09:58:25,947 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:25,947 INFO L218 NwaCegarLoop]: trace histogram [11, 9, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1] [2025-02-08 09:58:25,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 09:58:26,147 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 09:58:26,148 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:26,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:26,148 INFO L85 PathProgramCache]: Analyzing trace with hash 643325563, now seen corresponding path program 1 times [2025-02-08 09:58:26,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:26,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254976877] [2025-02-08 09:58:26,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:26,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:26,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 95 statements into 1 equivalence classes. [2025-02-08 09:58:26,158 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 95 of 95 statements. [2025-02-08 09:58:26,159 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:26,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:26,272 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 40 proven. 109 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2025-02-08 09:58:26,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254976877] [2025-02-08 09:58:26,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254976877] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:26,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422961794] [2025-02-08 09:58:26,273 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 09:58:26,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:26,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:26,276 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 09:58:26,277 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 09:58:26,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 95 statements into 1 equivalence classes. [2025-02-08 09:58:26,327 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 95 of 95 statements. [2025-02-08 09:58:26,327 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:26,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:26,328 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 09:58:26,329 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 167 proven. 67 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2025-02-08 09:58:26,395 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 49 proven. 137 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-02-08 09:58:26,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422961794] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:26,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:26,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 10] total 13 [2025-02-08 09:58:26,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647276606] [2025-02-08 09:58:26,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:26,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 09:58:26,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:26,624 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 09:58:26,625 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2025-02-08 09:58:26,625 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 09:58:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:26,753 INFO L93 Difference]: Finished difference Result 222 states and 399 transitions. [2025-02-08 09:58:26,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 09:58:26,755 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 95 [2025-02-08 09:58:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:26,758 INFO L225 Difference]: With dead ends: 222 [2025-02-08 09:58:26,758 INFO L226 Difference]: Without dead ends: 128 [2025-02-08 09:58:26,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 184 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 09:58:26,764 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:26,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 52 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:58:26,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-02-08 09:58:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2025-02-08 09:58:26,785 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 09:58:26,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 178 transitions. [2025-02-08 09:58:26,787 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 178 transitions. Word has length 95 [2025-02-08 09:58:26,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:26,787 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 178 transitions. [2025-02-08 09:58:26,787 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 09:58:26,787 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 178 transitions. [2025-02-08 09:58:26,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2025-02-08 09:58:26,792 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:26,792 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2025-02-08 09:58:26,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 09:58:26,992 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 09:58:26,992 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:26,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:26,993 INFO L85 PathProgramCache]: Analyzing trace with hash -373682135, now seen corresponding path program 2 times [2025-02-08 09:58:26,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:26,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122457878] [2025-02-08 09:58:26,993 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:58:26,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:26,997 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-02-08 09:58:27,005 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-02-08 09:58:27,005 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:58:27,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2025-02-08 09:58:27,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:27,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122457878] [2025-02-08 09:58:27,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122457878] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:27,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832794852] [2025-02-08 09:58:27,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:58:27,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:27,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:27,061 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 09:58:27,063 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 09:58:27,086 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 80 statements into 2 equivalence classes. [2025-02-08 09:58:27,101 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 80 of 80 statements. [2025-02-08 09:58:27,101 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:58:27,101 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:27,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 09:58:27,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2025-02-08 09:58:27,174 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2025-02-08 09:58:27,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832794852] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:27,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:27,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-02-08 09:58:27,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849420102] [2025-02-08 09:58:27,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:27,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 09:58:27,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:27,450 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 09:58:27,450 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-02-08 09:58:27,451 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 09:58:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:27,545 INFO L93 Difference]: Finished difference Result 171 states and 291 transitions. [2025-02-08 09:58:27,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 09:58:27,546 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 80 [2025-02-08 09:58:27,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:27,546 INFO L225 Difference]: With dead ends: 171 [2025-02-08 09:58:27,547 INFO L226 Difference]: Without dead ends: 65 [2025-02-08 09:58:27,548 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 148 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 09:58:27,548 INFO L435 NwaCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:27,548 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:58:27,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-08 09:58:27,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 61. [2025-02-08 09:58:27,553 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 09:58:27,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 84 transitions. [2025-02-08 09:58:27,554 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 84 transitions. Word has length 80 [2025-02-08 09:58:27,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:27,554 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 84 transitions. [2025-02-08 09:58:27,555 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 09:58:27,555 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 84 transitions. [2025-02-08 09:58:27,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2025-02-08 09:58:27,556 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:27,556 INFO L218 NwaCegarLoop]: trace histogram [14, 12, 11, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1] [2025-02-08 09:58:27,562 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 09:58:27,760 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 09:58:27,760 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:27,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:27,760 INFO L85 PathProgramCache]: Analyzing trace with hash -2075887121, now seen corresponding path program 2 times [2025-02-08 09:58:27,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:27,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968687687] [2025-02-08 09:58:27,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:58:27,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:27,765 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 128 statements into 2 equivalence classes. [2025-02-08 09:58:27,778 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 128 of 128 statements. [2025-02-08 09:58:27,778 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:58:27,778 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 59 proven. 135 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2025-02-08 09:58:27,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:27,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968687687] [2025-02-08 09:58:27,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968687687] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:27,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029298537] [2025-02-08 09:58:27,920 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:58:27,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:27,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:27,922 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 09:58:27,924 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 09:58:27,948 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 128 statements into 2 equivalence classes. [2025-02-08 09:58:27,969 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 128 of 128 statements. [2025-02-08 09:58:27,970 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:58:27,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:27,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 09:58:27,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:28,022 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 306 proven. 15 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2025-02-08 09:58:28,023 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:28,260 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 62 proven. 168 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2025-02-08 09:58:28,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029298537] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:28,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:28,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2025-02-08 09:58:28,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978020980] [2025-02-08 09:58:28,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:28,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 09:58:28,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:28,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 09:58:28,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-08 09:58:28,262 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, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-08 09:58:28,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:28,337 INFO L93 Difference]: Finished difference Result 113 states and 161 transitions. [2025-02-08 09:58:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 09:58:28,337 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, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 128 [2025-02-08 09:58:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:28,338 INFO L225 Difference]: With dead ends: 113 [2025-02-08 09:58:28,338 INFO L226 Difference]: Without dead ends: 54 [2025-02-08 09:58:28,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 248 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 09:58:28,339 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:28,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:58:28,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2025-02-08 09:58:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2025-02-08 09:58:28,350 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 09:58:28,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2025-02-08 09:58:28,351 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 128 [2025-02-08 09:58:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:28,351 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2025-02-08 09:58:28,352 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, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-08 09:58:28,352 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2025-02-08 09:58:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2025-02-08 09:58:28,352 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:28,352 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 09:58:28,359 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 09:58:28,553 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 09:58:28,553 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:28,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:28,554 INFO L85 PathProgramCache]: Analyzing trace with hash -95215480, now seen corresponding path program 3 times [2025-02-08 09:58:28,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:28,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714770414] [2025-02-08 09:58:28,554 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:58:28,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:28,561 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 109 statements into 10 equivalence classes. [2025-02-08 09:58:28,578 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 101 of 109 statements. [2025-02-08 09:58:28,578 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-08 09:58:28,578 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:28,715 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 09:58:28,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:28,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714770414] [2025-02-08 09:58:28,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714770414] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:28,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485211375] [2025-02-08 09:58:28,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:58:28,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:28,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:28,718 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 09:58:28,720 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 09:58:28,748 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 109 statements into 10 equivalence classes. [2025-02-08 09:58:28,768 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 101 of 109 statements. [2025-02-08 09:58:28,769 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-02-08 09:58:28,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:28,770 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 09:58:28,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:28,824 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 09:58:28,824 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:29,088 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 09:58:29,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485211375] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:29,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:29,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 15 [2025-02-08 09:58:29,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771068218] [2025-02-08 09:58:29,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:29,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 09:58:29,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:29,089 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 09:58:29,089 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2025-02-08 09:58:29,089 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 09:58:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:29,275 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2025-02-08 09:58:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-02-08 09:58:29,276 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 09:58:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:29,277 INFO L225 Difference]: With dead ends: 140 [2025-02-08 09:58:29,277 INFO L226 Difference]: Without dead ends: 83 [2025-02-08 09:58:29,277 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 09:58:29,278 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:29,278 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 74 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:58:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2025-02-08 09:58:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2025-02-08 09:58:29,284 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 09:58:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2025-02-08 09:58:29,284 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 109 [2025-02-08 09:58:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:29,284 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2025-02-08 09:58:29,285 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 09:58:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2025-02-08 09:58:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-02-08 09:58:29,285 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:29,285 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 09:58:29,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 09:58:29,486 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 09:58:29,486 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:29,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:29,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1374641713, now seen corresponding path program 4 times [2025-02-08 09:58:29,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:29,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130419796] [2025-02-08 09:58:29,487 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:58:29,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:29,490 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-02-08 09:58:29,493 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 09:58:29,493 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:58:29,493 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:29,572 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 09:58:29,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130419796] [2025-02-08 09:58:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130419796] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994031890] [2025-02-08 09:58:29,572 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:58:29,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:29,575 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 09:58:29,576 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 09:58:29,604 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-02-08 09:58:29,613 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 09:58:29,613 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:58:29,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:29,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 09:58:29,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:29,662 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 09:58:29,662 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:30,009 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 09:58:30,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994031890] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:30,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:30,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 16 [2025-02-08 09:58:30,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117020423] [2025-02-08 09:58:30,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:30,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 09:58:30,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:30,010 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 09:58:30,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2025-02-08 09:58:30,011 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 09:58:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:30,125 INFO L93 Difference]: Finished difference Result 134 states and 165 transitions. [2025-02-08 09:58:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 09:58:30,125 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 09:58:30,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:30,126 INFO L225 Difference]: With dead ends: 134 [2025-02-08 09:58:30,126 INFO L226 Difference]: Without dead ends: 66 [2025-02-08 09:58:30,127 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 09:58:30,127 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 34 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:30,128 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 79 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:58:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-02-08 09:58:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-02-08 09:58:30,131 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 09:58:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2025-02-08 09:58:30,132 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 90 [2025-02-08 09:58:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:30,132 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2025-02-08 09:58:30,132 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 09:58:30,133 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2025-02-08 09:58:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2025-02-08 09:58:30,133 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:30,134 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 15, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 6, 4, 1, 1, 1] [2025-02-08 09:58:30,140 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 09:58:30,334 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 09:58:30,334 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:30,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1564505734, now seen corresponding path program 5 times [2025-02-08 09:58:30,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:30,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89876157] [2025-02-08 09:58:30,335 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:58:30,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:30,341 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 181 statements into 15 equivalence classes. [2025-02-08 09:58:30,350 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 141 of 181 statements. [2025-02-08 09:58:30,351 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-02-08 09:58:30,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 281 proven. 362 refuted. 0 times theorem prover too weak. 470 trivial. 0 not checked. [2025-02-08 09:58:30,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:30,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89876157] [2025-02-08 09:58:30,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89876157] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:30,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659555435] [2025-02-08 09:58:30,536 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:58:30,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:30,538 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 09:58:30,540 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 09:58:30,570 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 181 statements into 15 equivalence classes. [2025-02-08 09:58:30,595 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) and asserted 141 of 181 statements. [2025-02-08 09:58:30,595 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2025-02-08 09:58:30,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:30,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 09:58:30,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:30,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 263 proven. 345 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2025-02-08 09:58:30,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 267 proven. 357 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2025-02-08 09:58:31,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659555435] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:31,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:31,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 15] total 21 [2025-02-08 09:58:31,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129702388] [2025-02-08 09:58:31,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:31,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-02-08 09:58:31,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:31,225 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-02-08 09:58:31,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2025-02-08 09:58:31,226 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 12 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2025-02-08 09:58:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:31,559 INFO L93 Difference]: Finished difference Result 156 states and 186 transitions. [2025-02-08 09:58:31,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-08 09:58:31,560 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 12 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) Word has length 181 [2025-02-08 09:58:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:31,561 INFO L225 Difference]: With dead ends: 156 [2025-02-08 09:58:31,561 INFO L226 Difference]: Without dead ends: 94 [2025-02-08 09:58:31,561 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 353 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=350, Invalid=910, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 09:58:31,562 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 110 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:31,562 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 99 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:58:31,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2025-02-08 09:58:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2025-02-08 09:58:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 62 states have internal predecessors, (70), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2025-02-08 09:58:31,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2025-02-08 09:58:31,574 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 181 [2025-02-08 09:58:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:31,575 INFO L471 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2025-02-08 09:58:31,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 21 states have internal predecessors, (110), 12 states have call successors, (19), 1 states have call predecessors, (19), 8 states have return successors, (22), 13 states have call predecessors, (22), 12 states have call successors, (22) [2025-02-08 09:58:31,575 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2025-02-08 09:58:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2025-02-08 09:58:31,576 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:31,577 INFO L218 NwaCegarLoop]: trace histogram [14, 12, 11, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1] [2025-02-08 09:58:31,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 09:58:31,777 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 09:58:31,777 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:31,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:31,778 INFO L85 PathProgramCache]: Analyzing trace with hash 992154269, now seen corresponding path program 6 times [2025-02-08 09:58:31,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:31,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649253697] [2025-02-08 09:58:31,778 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:58:31,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:31,784 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 128 statements into 9 equivalence classes. [2025-02-08 09:58:31,796 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 128 of 128 statements. [2025-02-08 09:58:31,796 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-08 09:58:31,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 183 proven. 132 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-02-08 09:58:31,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:31,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649253697] [2025-02-08 09:58:31,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649253697] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:31,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290960454] [2025-02-08 09:58:31,912 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:58:31,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:31,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:31,915 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 09:58:31,916 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 09:58:31,949 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 128 statements into 9 equivalence classes. [2025-02-08 09:58:31,970 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 128 of 128 statements. [2025-02-08 09:58:31,970 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-02-08 09:58:31,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:31,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-02-08 09:58:31,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 61 proven. 95 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2025-02-08 09:58:32,166 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 103 proven. 95 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2025-02-08 09:58:33,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290960454] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:33,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:33,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 33 [2025-02-08 09:58:33,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846618046] [2025-02-08 09:58:33,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:33,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-08 09:58:33,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:33,031 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-08 09:58:33,031 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2025-02-08 09:58:33,032 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 33 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 33 states have internal predecessors, (113), 11 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 23 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-08 09:58:33,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:33,518 INFO L93 Difference]: Finished difference Result 207 states and 271 transitions. [2025-02-08 09:58:33,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 09:58:33,518 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 33 states have internal predecessors, (113), 11 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 23 states have call predecessors, (25), 11 states have call successors, (25) Word has length 128 [2025-02-08 09:58:33,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:33,520 INFO L225 Difference]: With dead ends: 207 [2025-02-08 09:58:33,520 INFO L226 Difference]: Without dead ends: 124 [2025-02-08 09:58:33,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 227 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2025-02-08 09:58:33,521 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 155 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:33,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 94 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 09:58:33,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-02-08 09:58:33,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2025-02-08 09:58:33,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.054054054054054) internal successors, (78), 72 states have internal predecessors, (78), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (25), 12 states have call predecessors, (25), 10 states have call successors, (25) [2025-02-08 09:58:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2025-02-08 09:58:33,528 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 128 [2025-02-08 09:58:33,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:33,529 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2025-02-08 09:58:33,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4242424242424243) internal successors, (113), 33 states have internal predecessors, (113), 11 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 23 states have call predecessors, (25), 11 states have call successors, (25) [2025-02-08 09:58:33,529 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2025-02-08 09:58:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2025-02-08 09:58:33,531 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:33,531 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 09:58:33,537 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 09:58:33,731 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 09:58:33,732 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:33,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:33,732 INFO L85 PathProgramCache]: Analyzing trace with hash -989930100, now seen corresponding path program 7 times [2025-02-08 09:58:33,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:33,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389624905] [2025-02-08 09:58:33,732 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:58:33,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:33,749 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 299 statements into 1 equivalence classes. [2025-02-08 09:58:33,767 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 299 of 299 statements. [2025-02-08 09:58:33,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:33,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 484 proven. 1076 refuted. 0 times theorem prover too weak. 1590 trivial. 0 not checked. [2025-02-08 09:58:34,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:34,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389624905] [2025-02-08 09:58:34,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389624905] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:34,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55665] [2025-02-08 09:58:34,056 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:58:34,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:34,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:34,058 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 09:58:34,059 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 09:58:34,104 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 299 statements into 1 equivalence classes. [2025-02-08 09:58:34,145 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 299 of 299 statements. [2025-02-08 09:58:34,145 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:34,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:34,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-08 09:58:34,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 569 proven. 1181 refuted. 0 times theorem prover too weak. 1400 trivial. 0 not checked. [2025-02-08 09:58:34,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 569 proven. 1253 refuted. 0 times theorem prover too weak. 1328 trivial. 0 not checked. [2025-02-08 09:58:35,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55665] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:35,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:35,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-02-08 09:58:35,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718914069] [2025-02-08 09:58:35,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:35,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-08 09:58:35,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:35,552 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-08 09:58:35,552 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-02-08 09:58:35,552 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand has 28 states, 28 states have (on average 5.285714285714286) internal successors, (148), 28 states have internal predecessors, (148), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-02-08 09:58:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:35,965 INFO L93 Difference]: Finished difference Result 228 states and 302 transitions. [2025-02-08 09:58:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 09:58:35,966 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.285714285714286) internal successors, (148), 28 states have internal predecessors, (148), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) Word has length 299 [2025-02-08 09:58:35,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:35,967 INFO L225 Difference]: With dead ends: 228 [2025-02-08 09:58:35,968 INFO L226 Difference]: Without dead ends: 139 [2025-02-08 09:58:35,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 583 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2025-02-08 09:58:35,971 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 344 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:35,971 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 138 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:58:35,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-02-08 09:58:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2025-02-08 09:58:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.0515463917525774) internal successors, (102), 93 states have internal predecessors, (102), 14 states have call successors, (14), 11 states have call predecessors, (14), 8 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2025-02-08 09:58:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2025-02-08 09:58:35,980 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 299 [2025-02-08 09:58:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:35,982 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2025-02-08 09:58:35,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.285714285714286) internal successors, (148), 28 states have internal predecessors, (148), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-02-08 09:58:35,982 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2025-02-08 09:58:35,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2025-02-08 09:58:35,984 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:35,984 INFO L218 NwaCegarLoop]: trace histogram [27, 26, 22, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 9, 5, 1, 1, 1] [2025-02-08 09:58:35,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-08 09:58:36,184 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 09:58:36,185 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:36,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:36,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1317385245, now seen corresponding path program 8 times [2025-02-08 09:58:36,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:36,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657800177] [2025-02-08 09:58:36,185 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:58:36,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:36,192 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 260 statements into 2 equivalence classes. [2025-02-08 09:58:36,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 260 of 260 statements. [2025-02-08 09:58:36,204 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:58:36,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:36,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 571 proven. 345 refuted. 0 times theorem prover too weak. 1447 trivial. 0 not checked. [2025-02-08 09:58:36,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657800177] [2025-02-08 09:58:36,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657800177] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001326123] [2025-02-08 09:58:36,439 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:58:36,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:36,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:36,441 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 09:58:36,443 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 09:58:36,510 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 260 statements into 2 equivalence classes. [2025-02-08 09:58:36,548 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 260 of 260 statements. [2025-02-08 09:58:36,548 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:58:36,548 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:36,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 09:58:36,554 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 1197 proven. 484 refuted. 0 times theorem prover too weak. 682 trivial. 0 not checked. [2025-02-08 09:58:36,670 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:37,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2363 backedges. 511 proven. 831 refuted. 0 times theorem prover too weak. 1021 trivial. 0 not checked. [2025-02-08 09:58:37,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001326123] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:37,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:37,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 25 [2025-02-08 09:58:37,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084921089] [2025-02-08 09:58:37,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:37,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-02-08 09:58:37,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:37,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-02-08 09:58:37,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2025-02-08 09:58:37,787 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 25 states, 25 states have (on average 5.68) internal successors, (142), 25 states have internal predecessors, (142), 18 states have call successors, (25), 2 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 18 states have call successors, (32) [2025-02-08 09:58:38,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:38,051 INFO L93 Difference]: Finished difference Result 233 states and 298 transitions. [2025-02-08 09:58:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 09:58:38,055 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.68) internal successors, (142), 25 states have internal predecessors, (142), 18 states have call successors, (25), 2 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 18 states have call successors, (32) Word has length 260 [2025-02-08 09:58:38,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:38,056 INFO L225 Difference]: With dead ends: 233 [2025-02-08 09:58:38,056 INFO L226 Difference]: Without dead ends: 117 [2025-02-08 09:58:38,057 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 502 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 09:58:38,058 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 104 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:38,058 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 149 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:58:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2025-02-08 09:58:38,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2025-02-08 09:58:38,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 82 states have internal predecessors, (87), 13 states have call successors, (13), 10 states have call predecessors, (13), 7 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2025-02-08 09:58:38,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2025-02-08 09:58:38,067 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 260 [2025-02-08 09:58:38,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:38,067 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2025-02-08 09:58:38,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.68) internal successors, (142), 25 states have internal predecessors, (142), 18 states have call successors, (25), 2 states have call predecessors, (25), 10 states have return successors, (32), 12 states have call predecessors, (32), 18 states have call successors, (32) [2025-02-08 09:58:38,067 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2025-02-08 09:58:38,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2025-02-08 09:58:38,071 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:38,072 INFO L218 NwaCegarLoop]: trace histogram [52, 50, 42, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 24, 16, 10, 1, 1, 1] [2025-02-08 09:58:38,078 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 09:58:38,276 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 09:58:38,276 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:38,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:38,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1101292716, now seen corresponding path program 9 times [2025-02-08 09:58:38,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:38,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620147448] [2025-02-08 09:58:38,277 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:58:38,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:38,294 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 501 statements into 35 equivalence classes. [2025-02-08 09:58:38,362 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 370 of 501 statements. [2025-02-08 09:58:38,362 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-02-08 09:58:38,362 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1626 proven. 1020 refuted. 0 times theorem prover too weak. 6392 trivial. 0 not checked. [2025-02-08 09:58:38,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:38,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620147448] [2025-02-08 09:58:38,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620147448] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:38,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634875769] [2025-02-08 09:58:38,648 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:58:38,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:38,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:38,650 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 09:58:38,652 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 09:58:38,726 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 501 statements into 35 equivalence classes. [2025-02-08 09:58:38,800 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 370 of 501 statements. [2025-02-08 09:58:38,800 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-02-08 09:58:38,800 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:38,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 09:58:38,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:38,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1771 proven. 1024 refuted. 0 times theorem prover too weak. 6243 trivial. 0 not checked. [2025-02-08 09:58:38,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1779 proven. 1063 refuted. 0 times theorem prover too weak. 6196 trivial. 0 not checked. [2025-02-08 09:58:39,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634875769] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:39,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:39,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-02-08 09:58:39,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520295559] [2025-02-08 09:58:39,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:39,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 09:58:39,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:39,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 09:58:39,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-02-08 09:58:39,903 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 13 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) [2025-02-08 09:58:40,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:40,322 INFO L93 Difference]: Finished difference Result 296 states and 377 transitions. [2025-02-08 09:58:40,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-02-08 09:58:40,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 13 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) Word has length 501 [2025-02-08 09:58:40,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:40,325 INFO L225 Difference]: With dead ends: 296 [2025-02-08 09:58:40,326 INFO L226 Difference]: Without dead ends: 169 [2025-02-08 09:58:40,327 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 991 SyntacticMatches, 9 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=658, Invalid=1792, Unknown=0, NotChecked=0, Total=2450 [2025-02-08 09:58:40,328 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 223 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:40,328 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 114 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:58:40,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2025-02-08 09:58:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2025-02-08 09:58:40,340 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 09:58:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 169 transitions. [2025-02-08 09:58:40,341 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 169 transitions. Word has length 501 [2025-02-08 09:58:40,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:40,342 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 169 transitions. [2025-02-08 09:58:40,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.291666666666667) internal successors, (127), 24 states have internal predecessors, (127), 13 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) [2025-02-08 09:58:40,343 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 169 transitions. [2025-02-08 09:58:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2025-02-08 09:58:40,347 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:40,347 INFO L218 NwaCegarLoop]: trace histogram [35, 34, 28, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 11, 7, 1, 1, 1] [2025-02-08 09:58:40,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-08 09:58:40,551 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 09:58:40,551 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:40,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:40,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1478087445, now seen corresponding path program 10 times [2025-02-08 09:58:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:40,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814702314] [2025-02-08 09:58:40,552 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:58:40,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:40,564 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 338 statements into 2 equivalence classes. [2025-02-08 09:58:40,575 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 201 of 338 statements. [2025-02-08 09:58:40,575 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:58:40,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 743 proven. 1095 refuted. 0 times theorem prover too weak. 2212 trivial. 0 not checked. [2025-02-08 09:58:40,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:40,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814702314] [2025-02-08 09:58:40,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814702314] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:40,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899539862] [2025-02-08 09:58:40,775 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:58:40,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:40,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:40,779 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 09:58:40,780 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 09:58:40,855 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 338 statements into 2 equivalence classes. [2025-02-08 09:58:40,887 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 201 of 338 statements. [2025-02-08 09:58:40,888 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:58:40,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:40,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-08 09:58:40,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 856 proven. 1214 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2025-02-08 09:58:41,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 856 proven. 1290 refuted. 0 times theorem prover too weak. 1904 trivial. 0 not checked. [2025-02-08 09:58:42,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899539862] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:42,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:42,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-02-08 09:58:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105411409] [2025-02-08 09:58:42,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:42,158 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-08 09:58:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:42,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-08 09:58:42,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2025-02-08 09:58:42,159 INFO L87 Difference]: Start difference. First operand 135 states and 169 transitions. Second operand has 28 states, 28 states have (on average 5.285714285714286) internal successors, (148), 28 states have internal predecessors, (148), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-02-08 09:58:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:42,464 INFO L93 Difference]: Finished difference Result 284 states and 372 transitions. [2025-02-08 09:58:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-02-08 09:58:42,465 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.285714285714286) internal successors, (148), 28 states have internal predecessors, (148), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) Word has length 338 [2025-02-08 09:58:42,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:42,466 INFO L225 Difference]: With dead ends: 284 [2025-02-08 09:58:42,467 INFO L226 Difference]: Without dead ends: 153 [2025-02-08 09:58:42,468 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 659 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2025-02-08 09:58:42,468 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 76 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:42,468 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 192 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:58:42,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2025-02-08 09:58:42,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 144. [2025-02-08 09:58:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 114 states have internal predecessors, (120), 19 states have call successors, (19), 16 states have call predecessors, (19), 8 states have return successors, (38), 13 states have call predecessors, (38), 18 states have call successors, (38) [2025-02-08 09:58:42,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 177 transitions. [2025-02-08 09:58:42,478 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 177 transitions. Word has length 338 [2025-02-08 09:58:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:42,479 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 177 transitions. [2025-02-08 09:58:42,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.285714285714286) internal successors, (148), 28 states have internal predecessors, (148), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-02-08 09:58:42,480 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 177 transitions. [2025-02-08 09:58:42,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2025-02-08 09:58:42,481 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:42,481 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 09:58:42,487 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 09:58:42,683 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 09:58:42,683 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:42,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash -626892504, now seen corresponding path program 11 times [2025-02-08 09:58:42,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:42,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122534486] [2025-02-08 09:58:42,683 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:58:42,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:42,691 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 397 statements into 29 equivalence classes. [2025-02-08 09:58:42,726 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) and asserted 397 of 397 statements. [2025-02-08 09:58:42,726 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2025-02-08 09:58:42,726 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 893 proven. 1498 refuted. 0 times theorem prover too weak. 3237 trivial. 0 not checked. [2025-02-08 09:58:44,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:44,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122534486] [2025-02-08 09:58:44,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122534486] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:44,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66033358] [2025-02-08 09:58:44,785 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:58:44,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:44,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:44,787 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 09:58:44,792 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 09:58:44,881 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 397 statements into 29 equivalence classes. [2025-02-08 09:58:44,968 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) and asserted 397 of 397 statements. [2025-02-08 09:58:44,968 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2025-02-08 09:58:44,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:44,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-02-08 09:58:44,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:45,261 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 09:58:45,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:50,205 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 09:58:50,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66033358] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:50,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:50,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 29] total 47 [2025-02-08 09:58:50,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770031498] [2025-02-08 09:58:50,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:50,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-02-08 09:58:50,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:50,207 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-02-08 09:58:50,208 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1730, Unknown=0, NotChecked=0, Total=2256 [2025-02-08 09:58:50,208 INFO L87 Difference]: Start difference. First operand 144 states and 177 transitions. Second operand has 48 states, 47 states have (on average 2.617021276595745) internal successors, (123), 48 states have internal predecessors, (123), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) [2025-02-08 09:58:50,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:50,348 INFO L93 Difference]: Finished difference Result 175 states and 231 transitions. [2025-02-08 09:58:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-08 09:58:50,348 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.617021276595745) internal successors, (123), 48 states have internal predecessors, (123), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) Word has length 397 [2025-02-08 09:58:50,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:50,350 INFO L225 Difference]: With dead ends: 175 [2025-02-08 09:58:50,350 INFO L226 Difference]: Without dead ends: 174 [2025-02-08 09:58:50,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 772 SyntacticMatches, 55 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=613, Invalid=2039, Unknown=0, NotChecked=0, Total=2652 [2025-02-08 09:58:50,351 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:50,351 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 137 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:58:50,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2025-02-08 09:58:50,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 165. [2025-02-08 09:58:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 130 states have internal predecessors, (137), 21 states have call successors, (21), 16 states have call predecessors, (21), 10 states have return successors, (58), 18 states have call predecessors, (58), 20 states have call successors, (58) [2025-02-08 09:58:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 216 transitions. [2025-02-08 09:58:50,360 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 216 transitions. Word has length 397 [2025-02-08 09:58:50,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:50,360 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 216 transitions. [2025-02-08 09:58:50,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.617021276595745) internal successors, (123), 48 states have internal predecessors, (123), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) [2025-02-08 09:58:50,360 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 216 transitions. [2025-02-08 09:58:50,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2025-02-08 09:58:50,368 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:50,368 INFO L218 NwaCegarLoop]: trace histogram [127, 123, 103, 64, 64, 64, 64, 62, 62, 62, 62, 62, 61, 61, 61, 60, 39, 24, 1, 1, 1] [2025-02-08 09:58:50,375 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 09:58:50,572 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 09:58:50,572 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:50,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:50,573 INFO L85 PathProgramCache]: Analyzing trace with hash -687281964, now seen corresponding path program 12 times [2025-02-08 09:58:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:50,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689457039] [2025-02-08 09:58:50,573 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:58:50,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:50,617 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1228 statements into 98 equivalence classes. [2025-02-08 09:58:50,751 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) and asserted 799 of 1228 statements. [2025-02-08 09:58:50,754 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2025-02-08 09:58:50,754 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 55363 backedges. 2958 proven. 8146 refuted. 0 times theorem prover too weak. 44259 trivial. 0 not checked. [2025-02-08 09:58:51,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:51,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689457039] [2025-02-08 09:58:51,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689457039] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:51,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105798304] [2025-02-08 09:58:51,885 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:58:51,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:51,887 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 09:58:51,888 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 09:58:52,070 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1228 statements into 98 equivalence classes. [2025-02-08 09:58:52,240 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) and asserted 799 of 1228 statements. [2025-02-08 09:58:52,240 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2025-02-08 09:58:52,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:52,246 INFO L256 TraceCheckSpWp]: Trace formula consists of 1494 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-08 09:58:52,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:52,434 INFO L134 CoverageAnalysis]: Checked inductivity of 55363 backedges. 27490 proven. 4465 refuted. 0 times theorem prover too weak. 23408 trivial. 0 not checked. [2025-02-08 09:58:52,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 55363 backedges. 3156 proven. 8576 refuted. 0 times theorem prover too weak. 43631 trivial. 0 not checked. [2025-02-08 09:58:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105798304] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:54,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:54,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 27] total 34 [2025-02-08 09:58:54,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174684815] [2025-02-08 09:58:54,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:54,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-08 09:58:54,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:54,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-08 09:58:54,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2025-02-08 09:58:54,471 INFO L87 Difference]: Start difference. First operand 165 states and 216 transitions. Second operand has 34 states, 34 states have (on average 5.647058823529412) internal successors, (192), 33 states have internal predecessors, (192), 28 states have call successors, (35), 5 states have call predecessors, (35), 12 states have return successors, (38), 15 states have call predecessors, (38), 25 states have call successors, (38) [2025-02-08 09:58:54,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:54,936 INFO L93 Difference]: Finished difference Result 384 states and 544 transitions. [2025-02-08 09:58:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-08 09:58:54,937 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.647058823529412) internal successors, (192), 33 states have internal predecessors, (192), 28 states have call successors, (35), 5 states have call predecessors, (35), 12 states have return successors, (38), 15 states have call predecessors, (38), 25 states have call successors, (38) Word has length 1228 [2025-02-08 09:58:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:54,939 INFO L225 Difference]: With dead ends: 384 [2025-02-08 09:58:54,939 INFO L226 Difference]: Without dead ends: 223 [2025-02-08 09:58:54,941 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2519 GetRequests, 2440 SyntacticMatches, 17 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1035, Invalid=2997, Unknown=0, NotChecked=0, Total=4032 [2025-02-08 09:58:54,941 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 359 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:54,941 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 149 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:58:54,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2025-02-08 09:58:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 183. [2025-02-08 09:58:54,952 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 09:58:54,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 240 transitions. [2025-02-08 09:58:54,953 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 240 transitions. Word has length 1228 [2025-02-08 09:58:54,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:54,954 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 240 transitions. [2025-02-08 09:58:54,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.647058823529412) internal successors, (192), 33 states have internal predecessors, (192), 28 states have call successors, (35), 5 states have call predecessors, (35), 12 states have return successors, (38), 15 states have call predecessors, (38), 25 states have call successors, (38) [2025-02-08 09:58:54,955 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 240 transitions. [2025-02-08 09:58:54,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2025-02-08 09:58:54,958 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:54,958 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 09:58:54,966 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 09:58:55,159 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 09:58:55,159 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:55,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:55,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1930796604, now seen corresponding path program 13 times [2025-02-08 09:58:55,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:55,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086994182] [2025-02-08 09:58:55,160 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:58:55,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:55,172 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 809 statements into 1 equivalence classes. [2025-02-08 09:58:55,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 809 of 809 statements. [2025-02-08 09:58:55,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:55,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2257 proven. 4945 refuted. 0 times theorem prover too weak. 16657 trivial. 0 not checked. [2025-02-08 09:58:56,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:58:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086994182] [2025-02-08 09:58:56,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086994182] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:58:56,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028636588] [2025-02-08 09:58:56,052 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:58:56,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:58:56,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:58:56,054 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 09:58:56,056 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 09:58:56,223 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 809 statements into 1 equivalence classes. [2025-02-08 09:58:56,315 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 809 of 809 statements. [2025-02-08 09:58:56,315 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:58:56,315 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:58:56,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-08 09:58:56,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:58:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 12210 proven. 2667 refuted. 0 times theorem prover too weak. 8982 trivial. 0 not checked. [2025-02-08 09:58:56,455 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:58:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2246 proven. 5308 refuted. 0 times theorem prover too weak. 16305 trivial. 0 not checked. [2025-02-08 09:58:59,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028636588] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:58:59,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:58:59,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 27] total 32 [2025-02-08 09:58:59,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117061693] [2025-02-08 09:58:59,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:58:59,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-08 09:58:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:58:59,024 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-08 09:58:59,025 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2025-02-08 09:58:59,025 INFO L87 Difference]: Start difference. First operand 183 states and 240 transitions. Second operand has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-02-08 09:58:59,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:58:59,348 INFO L93 Difference]: Finished difference Result 362 states and 491 transitions. [2025-02-08 09:58:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 09:58:59,348 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) Word has length 809 [2025-02-08 09:58:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:58:59,350 INFO L225 Difference]: With dead ends: 362 [2025-02-08 09:58:59,350 INFO L226 Difference]: Without dead ends: 183 [2025-02-08 09:58:59,351 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1662 GetRequests, 1601 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2025-02-08 09:58:59,352 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 156 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:58:59,352 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 221 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:58:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2025-02-08 09:58:59,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 147. [2025-02-08 09:58:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 116 states have internal predecessors, (121), 19 states have call successors, (19), 14 states have call predecessors, (19), 9 states have return successors, (45), 16 states have call predecessors, (45), 18 states have call successors, (45) [2025-02-08 09:58:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 185 transitions. [2025-02-08 09:58:59,363 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 185 transitions. Word has length 809 [2025-02-08 09:58:59,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:58:59,364 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 185 transitions. [2025-02-08 09:58:59,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-02-08 09:58:59,364 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 185 transitions. [2025-02-08 09:58:59,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1733 [2025-02-08 09:58:59,375 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:58:59,376 INFO L218 NwaCegarLoop]: trace histogram [178, 175, 144, 89, 89, 89, 89, 88, 88, 88, 88, 88, 87, 87, 87, 86, 55, 34, 1, 1, 1] [2025-02-08 09:58:59,383 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 09:58:59,576 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 09:58:59,576 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:58:59,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:58:59,577 INFO L85 PathProgramCache]: Analyzing trace with hash -204895234, now seen corresponding path program 14 times [2025-02-08 09:58:59,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:58:59,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691341724] [2025-02-08 09:58:59,577 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:58:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:58:59,600 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1732 statements into 2 equivalence classes. [2025-02-08 09:58:59,704 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1732 of 1732 statements. [2025-02-08 09:58:59,705 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:58:59,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 110535 backedges. 4409 proven. 14460 refuted. 0 times theorem prover too weak. 91666 trivial. 0 not checked. [2025-02-08 09:59:02,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:02,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691341724] [2025-02-08 09:59:02,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691341724] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:02,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142274725] [2025-02-08 09:59:02,814 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:59:02,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:02,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:02,815 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 09:59:02,816 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 09:59:03,030 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1732 statements into 2 equivalence classes. [2025-02-08 09:59:03,233 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1732 of 1732 statements. [2025-02-08 09:59:03,233 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:59:03,234 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:03,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 3221 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-08 09:59:03,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 110535 backedges. 44623 proven. 10901 refuted. 0 times theorem prover too weak. 55011 trivial. 0 not checked. [2025-02-08 09:59:03,451 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 110535 backedges. 5338 proven. 16369 refuted. 0 times theorem prover too weak. 88828 trivial. 0 not checked. [2025-02-08 09:59:07,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142274725] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:07,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 33] total 38 [2025-02-08 09:59:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273500658] [2025-02-08 09:59:07,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:07,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2025-02-08 09:59:07,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:07,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2025-02-08 09:59:07,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2025-02-08 09:59:07,064 INFO L87 Difference]: Start difference. First operand 147 states and 185 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 09:59:07,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:07,723 INFO L93 Difference]: Finished difference Result 375 states and 513 transitions. [2025-02-08 09:59:07,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-02-08 09:59:07,724 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 1732 [2025-02-08 09:59:07,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:07,726 INFO L225 Difference]: With dead ends: 375 [2025-02-08 09:59:07,726 INFO L226 Difference]: Without dead ends: 232 [2025-02-08 09:59:07,729 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3542 GetRequests, 3443 SyntacticMatches, 19 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1599, Invalid=5043, Unknown=0, NotChecked=0, Total=6642 [2025-02-08 09:59:07,734 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 564 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:07,734 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 195 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:59:07,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2025-02-08 09:59:07,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 189. [2025-02-08 09:59:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 150 states have internal predecessors, (158), 25 states have call successors, (25), 20 states have call predecessors, (25), 10 states have return successors, (63), 18 states have call predecessors, (63), 24 states have call successors, (63) [2025-02-08 09:59:07,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 246 transitions. [2025-02-08 09:59:07,751 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 246 transitions. Word has length 1732 [2025-02-08 09:59:07,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:07,752 INFO L471 AbstractCegarLoop]: Abstraction has 189 states and 246 transitions. [2025-02-08 09:59:07,752 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 09:59:07,752 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 246 transitions. [2025-02-08 09:59:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2025-02-08 09:59:07,756 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:07,756 INFO L218 NwaCegarLoop]: trace histogram [93, 92, 75, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 45, 29, 18, 1, 1, 1] [2025-02-08 09:59:07,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-08 09:59:07,957 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 09:59:07,957 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:07,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1297171928, now seen corresponding path program 15 times [2025-02-08 09:59:07,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:07,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279222315] [2025-02-08 09:59:07,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:59:07,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:07,973 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 907 statements into 66 equivalence classes. [2025-02-08 09:59:08,001 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) and asserted 551 of 907 statements. [2025-02-08 09:59:08,001 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2025-02-08 09:59:08,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 30053 backedges. 4444 proven. 1382 refuted. 0 times theorem prover too weak. 24227 trivial. 0 not checked. [2025-02-08 09:59:08,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:08,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279222315] [2025-02-08 09:59:08,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279222315] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:08,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993780243] [2025-02-08 09:59:08,415 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:59:08,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:08,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:08,416 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:59:08,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-08 09:59:08,628 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 907 statements into 66 equivalence classes. [2025-02-08 09:59:08,735 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) and asserted 551 of 907 statements. [2025-02-08 09:59:08,735 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 41 check-sat command(s) [2025-02-08 09:59:08,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:08,739 INFO L256 TraceCheckSpWp]: Trace formula consists of 1034 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 09:59:08,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 30053 backedges. 4641 proven. 1482 refuted. 0 times theorem prover too weak. 23930 trivial. 0 not checked. [2025-02-08 09:59:08,850 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:59:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30053 backedges. 4649 proven. 1545 refuted. 0 times theorem prover too weak. 23859 trivial. 0 not checked. [2025-02-08 09:59:10,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993780243] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:59:10,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:59:10,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 21] total 26 [2025-02-08 09:59:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094158444] [2025-02-08 09:59:10,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:59:10,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-08 09:59:10,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:59:10,248 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-08 09:59:10,248 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2025-02-08 09:59:10,248 INFO L87 Difference]: Start difference. First operand 189 states and 246 transitions. Second operand has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 26 states have internal predecessors, (139), 14 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (29), 18 states have call predecessors, (29), 14 states have call successors, (29) [2025-02-08 09:59:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:59:10,585 INFO L93 Difference]: Finished difference Result 420 states and 550 transitions. [2025-02-08 09:59:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-08 09:59:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 26 states have internal predecessors, (139), 14 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (29), 18 states have call predecessors, (29), 14 states have call successors, (29) Word has length 907 [2025-02-08 09:59:10,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:59:10,589 INFO L225 Difference]: With dead ends: 420 [2025-02-08 09:59:10,589 INFO L226 Difference]: Without dead ends: 215 [2025-02-08 09:59:10,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1855 GetRequests, 1800 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=578, Invalid=1584, Unknown=0, NotChecked=0, Total=2162 [2025-02-08 09:59:10,590 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 143 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:59:10,590 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 194 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:59:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2025-02-08 09:59:10,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 186. [2025-02-08 09:59:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 148 states have internal predecessors, (154), 25 states have call successors, (25), 20 states have call predecessors, (25), 10 states have return successors, (52), 17 states have call predecessors, (52), 24 states have call successors, (52) [2025-02-08 09:59:10,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 231 transitions. [2025-02-08 09:59:10,602 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 231 transitions. Word has length 907 [2025-02-08 09:59:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:59:10,603 INFO L471 AbstractCegarLoop]: Abstraction has 186 states and 231 transitions. [2025-02-08 09:59:10,604 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.346153846153846) internal successors, (139), 26 states have internal predecessors, (139), 14 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (29), 18 states have call predecessors, (29), 14 states have call successors, (29) [2025-02-08 09:59:10,604 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 231 transitions. [2025-02-08 09:59:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1065 [2025-02-08 09:59:10,609 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:59:10,609 INFO L218 NwaCegarLoop]: trace histogram [109, 108, 88, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 53, 34, 21, 1, 1, 1] [2025-02-08 09:59:10,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-08 09:59:10,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:10,813 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:59:10,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:59:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1424159967, now seen corresponding path program 16 times [2025-02-08 09:59:10,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:59:10,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586582667] [2025-02-08 09:59:10,814 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:59:10,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:59:10,830 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1064 statements into 2 equivalence classes. [2025-02-08 09:59:10,869 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 1064 of 1064 statements. [2025-02-08 09:59:10,869 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 09:59:10,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 41466 backedges. 6686 proven. 7855 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2025-02-08 09:59:25,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:59:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586582667] [2025-02-08 09:59:25,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586582667] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:59:25,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568036824] [2025-02-08 09:59:25,382 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:59:25,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:59:25,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:59:25,384 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:59:25,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-08 09:59:25,601 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1064 statements into 2 equivalence classes. [2025-02-08 09:59:25,725 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 1064 of 1064 statements. [2025-02-08 09:59:25,725 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 09:59:25,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:59:25,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 1988 conjuncts, 217 conjuncts are in the unsatisfiable core [2025-02-08 09:59:25,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:59:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 41466 backedges. 6686 proven. 7855 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2025-02-08 09:59:26,402 INFO L312 TraceCheckSpWp]: Computing backward predicates...