./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 551b0097 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/termination-numeric/Fibonacci01-2.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-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 64bit --witnessprinter.graph.data.programhash 86ba16bc10375ac42edefcd6943a10cb01d22e743b7024fc57762abf0f29fc40 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 01:31:17,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 01:31:17,821 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2025-01-10 01:31:17,828 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 01:31:17,829 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 01:31:17,857 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 01:31:17,858 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 01:31:17,859 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 01:31:17,859 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 01:31:17,859 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 01:31:17,860 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 01:31:17,860 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 01:31:17,860 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 01:31:17,860 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 01:31:17,860 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 01:31:17,861 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 01:31:17,861 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:31:17,861 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:31:17,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:31:17,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:31:17,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 01:31:17,863 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 01:31:17,863 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 01:31:17,863 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 01:31:17,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:31:17,863 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 01:31:17,863 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 01:31:17,863 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-10 01:31:17,863 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-10 01:31:17,863 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 01:31:17,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 01:31:17,864 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 01:31:17,864 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 01:31:17,864 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 01:31:17,864 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 01:31:17,864 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86ba16bc10375ac42edefcd6943a10cb01d22e743b7024fc57762abf0f29fc40 [2025-01-10 01:31:18,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 01:31:18,156 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 01:31:18,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 01:31:18,162 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 01:31:18,163 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 01:31:18,164 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2025-01-10 01:31:19,585 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5bbed607b/091002260eee4f07810da006daff26ea/FLAGf5f1aac23 [2025-01-10 01:31:19,855 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 01:31:19,855 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2025-01-10 01:31:19,886 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5bbed607b/091002260eee4f07810da006daff26ea/FLAGf5f1aac23 [2025-01-10 01:31:19,912 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5bbed607b/091002260eee4f07810da006daff26ea [2025-01-10 01:31:19,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 01:31:19,916 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 01:31:19,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 01:31:19,919 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 01:31:19,922 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 01:31:19,924 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:31:19" (1/1) ... [2025-01-10 01:31:19,924 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4221e3e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:19, skipping insertion in model container [2025-01-10 01:31:19,925 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 01:31:19" (1/1) ... [2025-01-10 01:31:19,937 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 01:31:20,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:31:20,077 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 01:31:20,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 01:31:20,103 INFO L204 MainTranslator]: Completed translation [2025-01-10 01:31:20,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20 WrapperNode [2025-01-10 01:31:20,105 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 01:31:20,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 01:31:20,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 01:31:20,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 01:31:20,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,118 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,130 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2025-01-10 01:31:20,132 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 01:31:20,133 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 01:31:20,133 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 01:31:20,133 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 01:31:20,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,143 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,157 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]. [2025-01-10 01:31:20,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,163 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,167 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,167 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 01:31:20,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 01:31:20,170 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 01:31:20,170 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 01:31:20,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (1/1) ... [2025-01-10 01:31:20,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 01:31:20,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:20,202 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) [2025-01-10 01:31:20,206 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 [2025-01-10 01:31:20,225 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-01-10 01:31:20,226 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-01-10 01:31:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 01:31:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 01:31:20,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 01:31:20,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 01:31:20,265 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 01:31:20,266 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 01:31:20,406 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2025-01-10 01:31:20,406 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 01:31:20,417 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 01:31:20,418 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 01:31:20,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:31:20 BoogieIcfgContainer [2025-01-10 01:31:20,419 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 01:31:20,421 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 01:31:20,421 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 01:31:20,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 01:31:20,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 01:31:19" (1/3) ... [2025-01-10 01:31:20,426 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffbd98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:31:20, skipping insertion in model container [2025-01-10 01:31:20,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 01:31:20" (2/3) ... [2025-01-10 01:31:20,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffbd98e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 01:31:20, skipping insertion in model container [2025-01-10 01:31:20,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 01:31:20" (3/3) ... [2025-01-10 01:31:20,428 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci01-2.c [2025-01-10 01:31:20,442 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 01:31:20,444 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci01-2.c that has 2 procedures, 33 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-01-10 01:31:20,498 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 01:31:20,511 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;@336765f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 01:31:20,513 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-01-10 01:31:20,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 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) [2025-01-10 01:31:20,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-01-10 01:31:20,521 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:20,522 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:20,522 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:20,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:20,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1971762774, now seen corresponding path program 1 times [2025-01-10 01:31:20,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:20,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728519694] [2025-01-10 01:31:20,539 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:20,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:20,592 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-01-10 01:31:20,609 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-01-10 01:31:20,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:20,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:31:20,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:20,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728519694] [2025-01-10 01:31:20,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728519694] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:31:20,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:31:20,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 01:31:20,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052543105] [2025-01-10 01:31:20,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:31:20,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 01:31:20,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:20,708 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 01:31:20,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 01:31:20,711 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 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 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:31:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:20,749 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2025-01-10 01:31:20,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 01:31:20,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-01-10 01:31:20,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:20,755 INFO L225 Difference]: With dead ends: 38 [2025-01-10 01:31:20,755 INFO L226 Difference]: Without dead ends: 26 [2025-01-10 01:31:20,757 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 [2025-01-10 01:31:20,760 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 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 [2025-01-10 01:31:20,761 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 01:31:20,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-01-10 01:31:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2025-01-10 01:31:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 20 states have internal predecessors, (22), 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) [2025-01-10 01:31:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-01-10 01:31:20,796 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 9 [2025-01-10 01:31:20,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:20,796 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-01-10 01:31:20,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 01:31:20,798 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-01-10 01:31:20,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-01-10 01:31:20,799 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:20,799 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:20,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 01:31:20,800 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:20,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:20,801 INFO L85 PathProgramCache]: Analyzing trace with hash 995103892, now seen corresponding path program 1 times [2025-01-10 01:31:20,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:20,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098154377] [2025-01-10 01:31:20,801 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:20,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:20,810 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-01-10 01:31:20,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-01-10 01:31:20,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:20,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:20,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 01:31:20,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:20,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098154377] [2025-01-10 01:31:20,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098154377] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:31:20,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:31:20,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:31:20,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985380932] [2025-01-10 01:31:20,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:31:20,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:31:20,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:20,923 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:31:20,923 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:31:20,923 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-01-10 01:31:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:21,011 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2025-01-10 01:31:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:31:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2025-01-10 01:31:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:21,013 INFO L225 Difference]: With dead ends: 26 [2025-01-10 01:31:21,014 INFO L226 Difference]: Without dead ends: 24 [2025-01-10 01:31:21,014 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-01-10 01:31:21,014 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:21,015 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 01:31:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-01-10 01:31:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2025-01-10 01:31:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 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) [2025-01-10 01:31:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2025-01-10 01:31:21,022 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2025-01-10 01:31:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:21,022 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2025-01-10 01:31:21,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2025-01-10 01:31:21,023 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2025-01-10 01:31:21,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-01-10 01:31:21,023 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:21,024 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:21,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 01:31:21,024 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:21,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1145436074, now seen corresponding path program 1 times [2025-01-10 01:31:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:21,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471930892] [2025-01-10 01:31:21,025 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:21,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:21,034 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-01-10 01:31:21,048 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-01-10 01:31:21,049 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:21,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-01-10 01:31:21,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:21,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471930892] [2025-01-10 01:31:21,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471930892] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:31:21,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 01:31:21,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 01:31:21,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174148198] [2025-01-10 01:31:21,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:31:21,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:31:21,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:21,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:31:21,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 01:31:21,206 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2025-01-10 01:31:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:21,246 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2025-01-10 01:31:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:31:21,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 25 [2025-01-10 01:31:21,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:21,248 INFO L225 Difference]: With dead ends: 36 [2025-01-10 01:31:21,248 INFO L226 Difference]: Without dead ends: 34 [2025-01-10 01:31:21,248 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 [2025-01-10 01:31:21,250 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 58 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 [2025-01-10 01:31:21,250 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 58 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 01:31:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-01-10 01:31:21,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2025-01-10 01:31:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 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) [2025-01-10 01:31:21,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2025-01-10 01:31:21,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2025-01-10 01:31:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:21,261 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2025-01-10 01:31:21,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2025-01-10 01:31:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2025-01-10 01:31:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-10 01:31:21,265 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:21,265 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:21,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-10 01:31:21,266 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:21,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1158225235, now seen corresponding path program 1 times [2025-01-10 01:31:21,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:21,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967907575] [2025-01-10 01:31:21,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:21,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:21,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-10 01:31:21,281 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:31:21,281 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:21,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-10 01:31:21,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:21,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967907575] [2025-01-10 01:31:21,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967907575] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:21,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720015975] [2025-01-10 01:31:21,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:21,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:21,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:21,456 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) [2025-01-10 01:31:21,458 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 [2025-01-10 01:31:21,488 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-01-10 01:31:21,506 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:31:21,507 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:21,507 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:21,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 01:31:21,514 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:31:21,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-01-10 01:31:21,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720015975] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:21,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:21,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-01-10 01:31:21,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049560137] [2025-01-10 01:31:21,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:21,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-10 01:31:21,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:21,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-10 01:31:21,787 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-01-10 01:31:21,787 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2025-01-10 01:31:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:22,059 INFO L93 Difference]: Finished difference Result 92 states and 130 transitions. [2025-01-10 01:31:22,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:31:22,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 32 [2025-01-10 01:31:22,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:22,062 INFO L225 Difference]: With dead ends: 92 [2025-01-10 01:31:22,062 INFO L226 Difference]: Without dead ends: 66 [2025-01-10 01:31:22,063 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-01-10 01:31:22,064 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:22,064 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 110 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 01:31:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-01-10 01:31:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2025-01-10 01:31:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.1) internal successors, (44), 43 states have internal predecessors, (44), 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) [2025-01-10 01:31:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2025-01-10 01:31:22,080 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 32 [2025-01-10 01:31:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:22,080 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2025-01-10 01:31:22,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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) [2025-01-10 01:31:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2025-01-10 01:31:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-01-10 01:31:22,081 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:22,081 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:22,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-01-10 01:31:22,286 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 [2025-01-10 01:31:22,286 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:22,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2113808283, now seen corresponding path program 2 times [2025-01-10 01:31:22,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:22,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803178319] [2025-01-10 01:31:22,287 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:31:22,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:22,293 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-10 01:31:22,299 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:31:22,300 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:31:22,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-10 01:31:22,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:22,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803178319] [2025-01-10 01:31:22,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803178319] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:22,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347116908] [2025-01-10 01:31:22,399 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:31:22,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:22,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:22,402 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) [2025-01-10 01:31:22,404 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 [2025-01-10 01:31:22,430 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-01-10 01:31:22,442 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-01-10 01:31:22,443 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:31:22,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:22,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-10 01:31:22,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-10 01:31:22,492 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:31:22,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347116908] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:31:22,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 01:31:22,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-01-10 01:31:22,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608821303] [2025-01-10 01:31:22,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:31:22,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 01:31:22,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:22,494 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 01:31:22,494 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:31:22,494 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 01:31:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:22,527 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2025-01-10 01:31:22,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 01:31:22,529 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2025-01-10 01:31:22,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:22,530 INFO L225 Difference]: With dead ends: 61 [2025-01-10 01:31:22,530 INFO L226 Difference]: Without dead ends: 60 [2025-01-10 01:31:22,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-01-10 01:31:22,531 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 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 [2025-01-10 01:31:22,531 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 01:31:22,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-01-10 01:31:22,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2025-01-10 01:31:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 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) [2025-01-10 01:31:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2025-01-10 01:31:22,549 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 32 [2025-01-10 01:31:22,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:22,549 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2025-01-10 01:31:22,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 01:31:22,550 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2025-01-10 01:31:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2025-01-10 01:31:22,552 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:22,552 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:22,560 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 [2025-01-10 01:31:22,752 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 [2025-01-10 01:31:22,753 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:22,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:22,753 INFO L85 PathProgramCache]: Analyzing trace with hash -49114676, now seen corresponding path program 1 times [2025-01-10 01:31:22,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:22,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611149384] [2025-01-10 01:31:22,753 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:22,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:22,757 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-10 01:31:22,761 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:31:22,761 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:22,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-10 01:31:22,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611149384] [2025-01-10 01:31:22,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611149384] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034742941] [2025-01-10 01:31:22,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:22,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:22,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:22,838 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) [2025-01-10 01:31:22,840 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 [2025-01-10 01:31:22,866 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-01-10 01:31:22,875 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-01-10 01:31:22,876 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:22,876 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:22,876 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-10 01:31:22,877 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-10 01:31:22,939 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 01:31:22,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034742941] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 01:31:22,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 01:31:22,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-01-10 01:31:22,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850581953] [2025-01-10 01:31:22,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 01:31:22,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 01:31:22,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:22,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 01:31:22,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:31:22,940 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2025-01-10 01:31:22,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:22,979 INFO L93 Difference]: Finished difference Result 83 states and 118 transitions. [2025-01-10 01:31:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 01:31:22,980 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 27 [2025-01-10 01:31:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:22,981 INFO L225 Difference]: With dead ends: 83 [2025-01-10 01:31:22,981 INFO L226 Difference]: Without dead ends: 82 [2025-01-10 01:31:22,982 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-01-10 01:31:22,982 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 90 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 [2025-01-10 01:31:22,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 90 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 01:31:22,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-01-10 01:31:22,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2025-01-10 01:31:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 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) [2025-01-10 01:31:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 88 transitions. [2025-01-10 01:31:22,996 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 88 transitions. Word has length 27 [2025-01-10 01:31:22,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:22,996 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 88 transitions. [2025-01-10 01:31:22,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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) [2025-01-10 01:31:22,997 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 88 transitions. [2025-01-10 01:31:22,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-01-10 01:31:22,998 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:22,998 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:23,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-10 01:31:23,198 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 [2025-01-10 01:31:23,199 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:23,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:23,199 INFO L85 PathProgramCache]: Analyzing trace with hash 565518067, now seen corresponding path program 1 times [2025-01-10 01:31:23,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:23,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521198515] [2025-01-10 01:31:23,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:23,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:23,204 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-10 01:31:23,211 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-10 01:31:23,211 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:23,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-01-10 01:31:23,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:23,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521198515] [2025-01-10 01:31:23,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521198515] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:23,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364724138] [2025-01-10 01:31:23,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:23,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:23,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:23,371 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) [2025-01-10 01:31:23,374 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 [2025-01-10 01:31:23,406 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-01-10 01:31:23,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-01-10 01:31:23,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:23,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:23,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-10 01:31:23,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-01-10 01:31:23,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-01-10 01:31:23,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364724138] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:23,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:23,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-01-10 01:31:23,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321174213] [2025-01-10 01:31:23,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:23,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:31:23,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:23,748 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:31:23,748 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:31:23,748 INFO L87 Difference]: Start difference. First operand 65 states and 88 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 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) [2025-01-10 01:31:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:23,951 INFO L93 Difference]: Finished difference Result 142 states and 218 transitions. [2025-01-10 01:31:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-10 01:31:23,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 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 47 [2025-01-10 01:31:23,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:23,955 INFO L225 Difference]: With dead ends: 142 [2025-01-10 01:31:23,955 INFO L226 Difference]: Without dead ends: 140 [2025-01-10 01:31:23,957 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-01-10 01:31:23,959 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:23,959 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 186 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 01:31:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-01-10 01:31:23,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2025-01-10 01:31:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 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) [2025-01-10 01:31:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 160 transitions. [2025-01-10 01:31:23,992 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 160 transitions. Word has length 47 [2025-01-10 01:31:23,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:23,992 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 160 transitions. [2025-01-10 01:31:23,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 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) [2025-01-10 01:31:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 160 transitions. [2025-01-10 01:31:23,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-01-10 01:31:23,997 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:23,997 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:24,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 01:31:24,202 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 [2025-01-10 01:31:24,202 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:24,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:24,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1609484989, now seen corresponding path program 1 times [2025-01-10 01:31:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:24,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958806387] [2025-01-10 01:31:24,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:24,209 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-01-10 01:31:24,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-01-10 01:31:24,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:24,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 86 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-01-10 01:31:24,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958806387] [2025-01-10 01:31:24,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958806387] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:24,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303195322] [2025-01-10 01:31:24,384 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 01:31:24,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:24,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:24,386 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) [2025-01-10 01:31:24,388 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 [2025-01-10 01:31:24,414 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 85 statements into 1 equivalence classes. [2025-01-10 01:31:24,434 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 85 of 85 statements. [2025-01-10 01:31:24,434 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:24,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:24,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-01-10 01:31:24,437 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 50 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-01-10 01:31:24,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 50 proven. 95 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-01-10 01:31:24,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303195322] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:24,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:24,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 16 [2025-01-10 01:31:24,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984874014] [2025-01-10 01:31:24,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:24,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 01:31:24,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:24,901 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 01:31:24,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-01-10 01:31:24,903 INFO L87 Difference]: Start difference. First operand 99 states and 160 transitions. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 10 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2025-01-10 01:31:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:25,080 INFO L93 Difference]: Finished difference Result 175 states and 300 transitions. [2025-01-10 01:31:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-01-10 01:31:25,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 10 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) Word has length 85 [2025-01-10 01:31:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:25,084 INFO L225 Difference]: With dead ends: 175 [2025-01-10 01:31:25,087 INFO L226 Difference]: Without dead ends: 81 [2025-01-10 01:31:25,090 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 162 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2025-01-10 01:31:25,090 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:25,091 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 73 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 01:31:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-01-10 01:31:25,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2025-01-10 01:31:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 54 states have internal predecessors, (62), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (26), 12 states have call predecessors, (26), 6 states have call successors, (26) [2025-01-10 01:31:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2025-01-10 01:31:25,105 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 85 [2025-01-10 01:31:25,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:25,106 INFO L471 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2025-01-10 01:31:25,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 10 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2025-01-10 01:31:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2025-01-10 01:31:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-01-10 01:31:25,111 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:25,111 INFO L218 NwaCegarLoop]: trace histogram [19, 17, 13, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 6, 4, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:25,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-10 01:31:25,311 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 [2025-01-10 01:31:25,312 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:25,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1380368931, now seen corresponding path program 2 times [2025-01-10 01:31:25,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:25,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729037591] [2025-01-10 01:31:25,312 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:31:25,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:25,326 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 176 statements into 2 equivalence classes. [2025-01-10 01:31:25,348 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 176 of 176 statements. [2025-01-10 01:31:25,348 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:31:25,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 94 proven. 278 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2025-01-10 01:31:25,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729037591] [2025-01-10 01:31:25,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729037591] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242537531] [2025-01-10 01:31:25,538 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:31:25,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:25,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:25,541 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) [2025-01-10 01:31:25,543 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 [2025-01-10 01:31:25,574 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 176 statements into 2 equivalence classes. [2025-01-10 01:31:25,612 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 176 of 176 statements. [2025-01-10 01:31:25,613 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:31:25,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:25,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 01:31:25,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 449 proven. 15 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2025-01-10 01:31:25,684 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 95 proven. 328 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2025-01-10 01:31:26,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242537531] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:26,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:26,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2025-01-10 01:31:26,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990079273] [2025-01-10 01:31:26,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:26,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-01-10 01:31:26,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:26,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-01-10 01:31:26,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-01-10 01:31:26,043 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-01-10 01:31:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:26,141 INFO L93 Difference]: Finished difference Result 130 states and 180 transitions. [2025-01-10 01:31:26,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-01-10 01:31:26,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 176 [2025-01-10 01:31:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:26,142 INFO L225 Difference]: With dead ends: 130 [2025-01-10 01:31:26,142 INFO L226 Difference]: Without dead ends: 64 [2025-01-10 01:31:26,143 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 344 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-01-10 01:31:26,145 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:26,145 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 64 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 01:31:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-01-10 01:31:26,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2025-01-10 01:31:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 47 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) [2025-01-10 01:31:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2025-01-10 01:31:26,155 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 176 [2025-01-10 01:31:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:26,155 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2025-01-10 01:31:26,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-01-10 01:31:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2025-01-10 01:31:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-01-10 01:31:26,156 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:26,156 INFO L218 NwaCegarLoop]: trace histogram [12, 10, 10, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:26,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-01-10 01:31:26,357 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 [2025-01-10 01:31:26,357 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:26,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:26,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2120770393, now seen corresponding path program 3 times [2025-01-10 01:31:26,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:26,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101117375] [2025-01-10 01:31:26,358 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:31:26,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:26,364 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 111 statements into 10 equivalence classes. [2025-01-10 01:31:26,375 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 72 of 111 statements. [2025-01-10 01:31:26,376 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-10 01:31:26,376 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 100 proven. 25 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-01-10 01:31:26,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:26,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101117375] [2025-01-10 01:31:26,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101117375] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:26,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106347993] [2025-01-10 01:31:26,597 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:31:26,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:26,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:26,599 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) [2025-01-10 01:31:26,602 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 [2025-01-10 01:31:26,633 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 111 statements into 10 equivalence classes. [2025-01-10 01:31:26,651 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 72 of 111 statements. [2025-01-10 01:31:26,651 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-01-10 01:31:26,651 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:26,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 01:31:26,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-01-10 01:31:26,751 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-01-10 01:31:27,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106347993] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:27,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:27,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2025-01-10 01:31:27,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914964563] [2025-01-10 01:31:27,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:27,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:31:27,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:27,149 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:31:27,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:31:27,150 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 5 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) [2025-01-10 01:31:27,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:27,221 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2025-01-10 01:31:27,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 01:31:27,222 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 5 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) Word has length 111 [2025-01-10 01:31:27,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:27,222 INFO L225 Difference]: With dead ends: 65 [2025-01-10 01:31:27,222 INFO L226 Difference]: Without dead ends: 64 [2025-01-10 01:31:27,223 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 207 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2025-01-10 01:31:27,223 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:27,223 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 104 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 01:31:27,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-01-10 01:31:27,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 57. [2025-01-10 01:31:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 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) [2025-01-10 01:31:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2025-01-10 01:31:27,235 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 111 [2025-01-10 01:31:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:27,236 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2025-01-10 01:31:27,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 20 states have internal predecessors, (63), 5 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) [2025-01-10 01:31:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2025-01-10 01:31:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-01-10 01:31:27,237 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:27,237 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:27,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-01-10 01:31:27,442 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 [2025-01-10 01:31:27,442 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:27,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:27,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1928081908, now seen corresponding path program 2 times [2025-01-10 01:31:27,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:27,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196561924] [2025-01-10 01:31:27,442 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:31:27,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:27,448 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 106 statements into 2 equivalence classes. [2025-01-10 01:31:27,457 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 106 of 106 statements. [2025-01-10 01:31:27,457 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:31:27,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 72 proven. 159 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-10 01:31:27,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:27,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196561924] [2025-01-10 01:31:27,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196561924] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:27,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296509265] [2025-01-10 01:31:27,668 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:31:27,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:27,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:27,670 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 01:31:27,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-10 01:31:27,703 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 106 statements into 2 equivalence classes. [2025-01-10 01:31:27,725 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 106 of 106 statements. [2025-01-10 01:31:27,725 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:31:27,725 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:27,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 01:31:27,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 82 proven. 158 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-01-10 01:31:27,835 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 82 proven. 174 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-01-10 01:31:28,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296509265] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:28,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:28,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2025-01-10 01:31:28,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794999967] [2025-01-10 01:31:28,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:28,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 01:31:28,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:28,466 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 01:31:28,466 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-01-10 01:31:28,469 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 13 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-01-10 01:31:28,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:28,725 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2025-01-10 01:31:28,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-10 01:31:28,726 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 13 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) Word has length 106 [2025-01-10 01:31:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:28,727 INFO L225 Difference]: With dead ends: 135 [2025-01-10 01:31:28,727 INFO L226 Difference]: Without dead ends: 85 [2025-01-10 01:31:28,728 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 204 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2025-01-10 01:31:28,729 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 108 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:28,729 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 113 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 01:31:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-01-10 01:31:28,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2025-01-10 01:31:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 58 states have internal predecessors, (65), 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) [2025-01-10 01:31:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2025-01-10 01:31:28,743 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 106 [2025-01-10 01:31:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:28,743 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2025-01-10 01:31:28,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.7) internal successors, (94), 20 states have internal predecessors, (94), 13 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-01-10 01:31:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2025-01-10 01:31:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2025-01-10 01:31:28,745 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:28,745 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:28,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 01:31:28,950 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 [2025-01-10 01:31:28,950 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:28,950 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:28,950 INFO L85 PathProgramCache]: Analyzing trace with hash -728010751, now seen corresponding path program 3 times [2025-01-10 01:31:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:28,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680525065] [2025-01-10 01:31:28,951 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:31:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:28,956 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 7 equivalence classes. [2025-01-10 01:31:28,963 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 81 of 87 statements. [2025-01-10 01:31:28,964 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-10 01:31:28,964 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:29,104 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 89 proven. 48 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2025-01-10 01:31:29,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:29,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680525065] [2025-01-10 01:31:29,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680525065] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:29,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319618313] [2025-01-10 01:31:29,105 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:31:29,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:29,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:29,107 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) [2025-01-10 01:31:29,110 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 [2025-01-10 01:31:29,144 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 87 statements into 7 equivalence classes. [2025-01-10 01:31:29,163 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 81 of 87 statements. [2025-01-10 01:31:29,163 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-10 01:31:29,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:29,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-01-10 01:31:29,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2025-01-10 01:31:29,372 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2025-01-10 01:31:30,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319618313] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:30,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:30,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 32 [2025-01-10 01:31:30,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57626841] [2025-01-10 01:31:30,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:30,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-10 01:31:30,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:30,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-10 01:31:30,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2025-01-10 01:31:30,158 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 12 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (22), 19 states have call predecessors, (22), 12 states have call successors, (22) [2025-01-10 01:31:30,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:30,898 INFO L93 Difference]: Finished difference Result 197 states and 284 transitions. [2025-01-10 01:31:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-10 01:31:30,898 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 12 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (22), 19 states have call predecessors, (22), 12 states have call successors, (22) Word has length 87 [2025-01-10 01:31:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:30,900 INFO L225 Difference]: With dead ends: 197 [2025-01-10 01:31:30,900 INFO L226 Difference]: Without dead ends: 129 [2025-01-10 01:31:30,902 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=767, Invalid=3139, Unknown=0, NotChecked=0, Total=3906 [2025-01-10 01:31:30,902 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 198 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:30,902 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 124 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-10 01:31:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-01-10 01:31:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2025-01-10 01:31:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 81 states have (on average 1.037037037037037) internal successors, (84), 79 states have internal predecessors, (84), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (47), 16 states have call predecessors, (47), 10 states have call successors, (47) [2025-01-10 01:31:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 142 transitions. [2025-01-10 01:31:30,928 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 142 transitions. Word has length 87 [2025-01-10 01:31:30,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:30,929 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 142 transitions. [2025-01-10 01:31:30,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 12 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (22), 19 states have call predecessors, (22), 12 states have call successors, (22) [2025-01-10 01:31:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 142 transitions. [2025-01-10 01:31:30,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2025-01-10 01:31:30,933 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:30,933 INFO L218 NwaCegarLoop]: trace histogram [34, 32, 27, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 10, 7, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:30,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-01-10 01:31:31,138 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 [2025-01-10 01:31:31,138 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:31,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1677256000, now seen corresponding path program 4 times [2025-01-10 01:31:31,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:31,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827704469] [2025-01-10 01:31:31,139 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:31:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:31,151 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 327 statements into 2 equivalence classes. [2025-01-10 01:31:31,166 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 194 of 327 statements. [2025-01-10 01:31:31,166 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:31:31,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:31,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3713 backedges. 404 proven. 976 refuted. 0 times theorem prover too weak. 2333 trivial. 0 not checked. [2025-01-10 01:31:31,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:31,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827704469] [2025-01-10 01:31:31,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827704469] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:31,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344483730] [2025-01-10 01:31:31,447 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:31:31,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:31,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:31,449 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) [2025-01-10 01:31:31,451 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 [2025-01-10 01:31:31,514 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 327 statements into 2 equivalence classes. [2025-01-10 01:31:31,553 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 194 of 327 statements. [2025-01-10 01:31:31,553 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:31:31,553 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:31,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 01:31:31,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3713 backedges. 396 proven. 1338 refuted. 0 times theorem prover too weak. 1979 trivial. 0 not checked. [2025-01-10 01:31:31,710 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3713 backedges. 396 proven. 1377 refuted. 0 times theorem prover too weak. 1940 trivial. 0 not checked. [2025-01-10 01:31:32,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344483730] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:32,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:32,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 24 [2025-01-10 01:31:32,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3619199] [2025-01-10 01:31:32,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:32,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 01:31:32,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:32,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 01:31:32,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-01-10 01:31:32,892 INFO L87 Difference]: Start difference. First operand 102 states and 142 transitions. Second operand has 24 states, 24 states have (on average 5.625) internal successors, (135), 24 states have internal predecessors, (135), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 12 states have call predecessors, (28), 18 states have call successors, (28) [2025-01-10 01:31:33,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:33,179 INFO L93 Difference]: Finished difference Result 252 states and 398 transitions. [2025-01-10 01:31:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-01-10 01:31:33,180 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.625) internal successors, (135), 24 states have internal predecessors, (135), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 12 states have call predecessors, (28), 18 states have call successors, (28) Word has length 327 [2025-01-10 01:31:33,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:33,181 INFO L225 Difference]: With dead ends: 252 [2025-01-10 01:31:33,181 INFO L226 Difference]: Without dead ends: 157 [2025-01-10 01:31:33,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 688 GetRequests, 641 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2025-01-10 01:31:33,183 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 113 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:33,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 167 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 01:31:33,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2025-01-10 01:31:33,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 141. [2025-01-10 01:31:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 113 states have (on average 1.0442477876106195) internal successors, (118), 109 states have internal predecessors, (118), 15 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (57), 23 states have call predecessors, (57), 14 states have call successors, (57) [2025-01-10 01:31:33,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 190 transitions. [2025-01-10 01:31:33,206 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 190 transitions. Word has length 327 [2025-01-10 01:31:33,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:33,206 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 190 transitions. [2025-01-10 01:31:33,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.625) internal successors, (135), 24 states have internal predecessors, (135), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 12 states have call predecessors, (28), 18 states have call successors, (28) [2025-01-10 01:31:33,207 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 190 transitions. [2025-01-10 01:31:33,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2025-01-10 01:31:33,224 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:33,224 INFO L218 NwaCegarLoop]: trace histogram [47, 45, 38, 23, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 21, 15, 9, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:33,231 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 [2025-01-10 01:31:33,424 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 [2025-01-10 01:31:33,424 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:33,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1806670161, now seen corresponding path program 5 times [2025-01-10 01:31:33,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:33,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768857389] [2025-01-10 01:31:33,425 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:31:33,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:33,440 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 454 statements into 35 equivalence classes. [2025-01-10 01:31:33,474 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) and asserted 324 of 454 statements. [2025-01-10 01:31:33,475 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2025-01-10 01:31:33,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7309 backedges. 1720 proven. 1148 refuted. 0 times theorem prover too weak. 4441 trivial. 0 not checked. [2025-01-10 01:31:33,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:33,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768857389] [2025-01-10 01:31:33,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768857389] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:33,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518159517] [2025-01-10 01:31:33,971 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:31:33,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:33,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:33,974 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) [2025-01-10 01:31:33,975 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 [2025-01-10 01:31:34,052 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 454 statements into 35 equivalence classes. [2025-01-10 01:31:34,133 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) and asserted 324 of 454 statements. [2025-01-10 01:31:34,133 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2025-01-10 01:31:34,133 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:34,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-01-10 01:31:34,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 7309 backedges. 1733 proven. 1157 refuted. 0 times theorem prover too weak. 4419 trivial. 0 not checked. [2025-01-10 01:31:34,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7309 backedges. 1730 proven. 1216 refuted. 0 times theorem prover too weak. 4363 trivial. 0 not checked. [2025-01-10 01:31:35,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518159517] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:35,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:35,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 22] total 29 [2025-01-10 01:31:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784662530] [2025-01-10 01:31:35,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:35,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-01-10 01:31:35,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:35,899 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-01-10 01:31:35,899 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2025-01-10 01:31:35,899 INFO L87 Difference]: Start difference. First operand 141 states and 190 transitions. Second operand has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 20 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (31), 13 states have call predecessors, (31), 20 states have call successors, (31) [2025-01-10 01:31:36,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:36,361 INFO L93 Difference]: Finished difference Result 279 states and 439 transitions. [2025-01-10 01:31:36,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-01-10 01:31:36,362 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 20 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (31), 13 states have call predecessors, (31), 20 states have call successors, (31) Word has length 454 [2025-01-10 01:31:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:36,365 INFO L225 Difference]: With dead ends: 279 [2025-01-10 01:31:36,365 INFO L226 Difference]: Without dead ends: 145 [2025-01-10 01:31:36,368 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 895 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=1820, Unknown=0, NotChecked=0, Total=2450 [2025-01-10 01:31:36,368 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 299 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:36,369 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 173 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 01:31:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2025-01-10 01:31:36,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 123. [2025-01-10 01:31:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 100 states have (on average 1.05) internal successors, (105), 96 states have internal predecessors, (105), 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) [2025-01-10 01:31:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 151 transitions. [2025-01-10 01:31:36,387 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 151 transitions. Word has length 454 [2025-01-10 01:31:36,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:36,387 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 151 transitions. [2025-01-10 01:31:36,387 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.172413793103448) internal successors, (150), 29 states have internal predecessors, (150), 20 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (31), 13 states have call predecessors, (31), 20 states have call successors, (31) [2025-01-10 01:31:36,388 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 151 transitions. [2025-01-10 01:31:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2025-01-10 01:31:36,392 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:36,392 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, 1, 1, 1] [2025-01-10 01:31:36,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-01-10 01:31:36,597 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 [2025-01-10 01:31:36,597 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:36,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:36,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1367037988, now seen corresponding path program 6 times [2025-01-10 01:31:36,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:36,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517140282] [2025-01-10 01:31:36,598 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:31:36,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:36,611 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 302 statements into 21 equivalence classes. [2025-01-10 01:31:36,649 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 266 of 302 statements. [2025-01-10 01:31:36,649 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-01-10 01:31:36,650 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 688 proven. 797 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2025-01-10 01:31:37,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:37,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517140282] [2025-01-10 01:31:37,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517140282] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:37,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202041573] [2025-01-10 01:31:37,026 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 01:31:37,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:37,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:37,028 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) [2025-01-10 01:31:37,030 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 [2025-01-10 01:31:37,105 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 302 statements into 21 equivalence classes. [2025-01-10 01:31:37,167 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 266 of 302 statements. [2025-01-10 01:31:37,167 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-01-10 01:31:37,167 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:37,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 01:31:37,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 690 proven. 797 refuted. 0 times theorem prover too weak. 1663 trivial. 0 not checked. [2025-01-10 01:31:37,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 706 proven. 824 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [2025-01-10 01:31:38,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202041573] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:38,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:38,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-01-10 01:31:38,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680707219] [2025-01-10 01:31:38,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:38,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 01:31:38,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:38,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 01:31:38,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2025-01-10 01:31:38,383 INFO L87 Difference]: Start difference. First operand 123 states and 151 transitions. Second operand has 24 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 16 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) [2025-01-10 01:31:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:38,744 INFO L93 Difference]: Finished difference Result 249 states and 327 transitions. [2025-01-10 01:31:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-10 01:31:38,745 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 16 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) Word has length 302 [2025-01-10 01:31:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:38,746 INFO L225 Difference]: With dead ends: 249 [2025-01-10 01:31:38,747 INFO L226 Difference]: Without dead ends: 133 [2025-01-10 01:31:38,748 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 636 GetRequests, 592 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2025-01-10 01:31:38,748 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 104 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:38,748 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 271 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-10 01:31:38,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2025-01-10 01:31:38,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 120. [2025-01-10 01:31:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.041237113402062) internal successors, (101), 95 states have internal predecessors, (101), 15 states have call successors, (15), 12 states have call predecessors, (15), 7 states have return successors, (29), 12 states have call predecessors, (29), 14 states have call successors, (29) [2025-01-10 01:31:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 145 transitions. [2025-01-10 01:31:38,760 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 145 transitions. Word has length 302 [2025-01-10 01:31:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:38,760 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 145 transitions. [2025-01-10 01:31:38,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.5) internal successors, (132), 24 states have internal predecessors, (132), 16 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) [2025-01-10 01:31:38,761 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2025-01-10 01:31:38,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2025-01-10 01:31:38,763 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:38,763 INFO L218 NwaCegarLoop]: trace histogram [51, 50, 41, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 16, 10, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:38,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-01-10 01:31:38,964 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 [2025-01-10 01:31:38,964 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:38,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:38,965 INFO L85 PathProgramCache]: Analyzing trace with hash -542493228, now seen corresponding path program 7 times [2025-01-10 01:31:38,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:38,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550568338] [2025-01-10 01:31:38,965 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:31:38,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:38,976 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 498 statements into 1 equivalence classes. [2025-01-10 01:31:39,003 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 498 of 498 statements. [2025-01-10 01:31:39,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:39,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:39,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8820 backedges. 1078 proven. 2452 refuted. 0 times theorem prover too weak. 5290 trivial. 0 not checked. [2025-01-10 01:31:39,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:39,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550568338] [2025-01-10 01:31:39,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550568338] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:39,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115601034] [2025-01-10 01:31:39,684 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 01:31:39,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:39,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:39,687 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) [2025-01-10 01:31:39,689 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 [2025-01-10 01:31:39,781 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 498 statements into 1 equivalence classes. [2025-01-10 01:31:39,874 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 498 of 498 statements. [2025-01-10 01:31:39,875 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 01:31:39,875 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:39,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-10 01:31:39,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8820 backedges. 1276 proven. 2649 refuted. 0 times theorem prover too weak. 4895 trivial. 0 not checked. [2025-01-10 01:31:40,070 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:42,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8820 backedges. 1276 proven. 2764 refuted. 0 times theorem prover too weak. 4780 trivial. 0 not checked. [2025-01-10 01:31:42,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115601034] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:42,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:42,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 27] total 32 [2025-01-10 01:31:42,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761632563] [2025-01-10 01:31:42,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:42,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-10 01:31:42,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:42,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-10 01:31:42,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2025-01-10 01:31:42,131 INFO L87 Difference]: Start difference. First operand 120 states and 145 transitions. Second operand has 32 states, 32 states have (on average 5.46875) internal successors, (175), 32 states have internal predecessors, (175), 25 states have call successors, (29), 1 states have call predecessors, (29), 13 states have return successors, (38), 15 states have call predecessors, (38), 25 states have call successors, (38) [2025-01-10 01:31:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:42,639 INFO L93 Difference]: Finished difference Result 272 states and 356 transitions. [2025-01-10 01:31:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-01-10 01:31:42,639 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.46875) internal successors, (175), 32 states have internal predecessors, (175), 25 states have call successors, (29), 1 states have call predecessors, (29), 13 states have return successors, (38), 15 states have call predecessors, (38), 25 states have call successors, (38) Word has length 498 [2025-01-10 01:31:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:42,641 INFO L225 Difference]: With dead ends: 272 [2025-01-10 01:31:42,641 INFO L226 Difference]: Without dead ends: 159 [2025-01-10 01:31:42,642 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 978 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=824, Invalid=2482, Unknown=0, NotChecked=0, Total=3306 [2025-01-10 01:31:42,643 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 445 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:42,643 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 215 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-10 01:31:42,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2025-01-10 01:31:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 138. [2025-01-10 01:31:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 110 states have internal predecessors, (115), 18 states have call successors, (18), 14 states have call predecessors, (18), 8 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) [2025-01-10 01:31:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 170 transitions. [2025-01-10 01:31:42,654 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 170 transitions. Word has length 498 [2025-01-10 01:31:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:42,654 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 170 transitions. [2025-01-10 01:31:42,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.46875) internal successors, (175), 32 states have internal predecessors, (175), 25 states have call successors, (29), 1 states have call predecessors, (29), 13 states have return successors, (38), 15 states have call predecessors, (38), 25 states have call successors, (38) [2025-01-10 01:31:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 170 transitions. [2025-01-10 01:31:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2025-01-10 01:31:42,656 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:42,656 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, 1, 1, 1] [2025-01-10 01:31:42,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-01-10 01:31:42,861 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 [2025-01-10 01:31:42,861 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:42,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash -132900775, now seen corresponding path program 8 times [2025-01-10 01:31:42,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:42,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866422775] [2025-01-10 01:31:42,862 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:31:42,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:42,873 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 400 statements into 2 equivalence classes. [2025-01-10 01:31:42,905 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 400 of 400 statements. [2025-01-10 01:31:42,907 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:31:42,907 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 830 proven. 1470 refuted. 0 times theorem prover too weak. 3328 trivial. 0 not checked. [2025-01-10 01:31:45,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:31:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866422775] [2025-01-10 01:31:45,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866422775] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:31:45,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389667710] [2025-01-10 01:31:45,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 01:31:45,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:31:45,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:31:45,075 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) [2025-01-10 01:31:45,077 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 [2025-01-10 01:31:45,188 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 400 statements into 2 equivalence classes. [2025-01-10 01:31:45,258 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 400 of 400 statements. [2025-01-10 01:31:45,258 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 01:31:45,258 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:31:45,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-01-10 01:31:45,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:31:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2025-01-10 01:31:45,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:31:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 1149 proven. 1015 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2025-01-10 01:31:51,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389667710] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:31:51,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:31:51,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 45 [2025-01-10 01:31:51,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150759877] [2025-01-10 01:31:51,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:31:51,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-01-10 01:31:51,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:31:51,845 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-01-10 01:31:51,846 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2025-01-10 01:31:51,846 INFO L87 Difference]: Start difference. First operand 138 states and 170 transitions. Second operand has 46 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 46 states have internal predecessors, (120), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) [2025-01-10 01:31:51,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:31:51,993 INFO L93 Difference]: Finished difference Result 169 states and 224 transitions. [2025-01-10 01:31:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-10 01:31:51,994 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 46 states have internal predecessors, (120), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) Word has length 400 [2025-01-10 01:31:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:31:51,996 INFO L225 Difference]: With dead ends: 169 [2025-01-10 01:31:51,996 INFO L226 Difference]: Without dead ends: 168 [2025-01-10 01:31:51,997 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 883 GetRequests, 784 SyntacticMatches, 51 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=544, Invalid=1906, Unknown=0, NotChecked=0, Total=2450 [2025-01-10 01:31:51,997 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 01:31:51,998 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 237 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 01:31:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2025-01-10 01:31:52,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 159. [2025-01-10 01:31:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 128 states have (on average 1.03125) internal successors, (132), 126 states have internal predecessors, (132), 20 states have call successors, (20), 14 states have call predecessors, (20), 10 states have return successors, (57), 18 states have call predecessors, (57), 19 states have call successors, (57) [2025-01-10 01:31:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 209 transitions. [2025-01-10 01:31:52,011 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 209 transitions. Word has length 400 [2025-01-10 01:31:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:31:52,014 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 209 transitions. [2025-01-10 01:31:52,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.6666666666666665) internal successors, (120), 46 states have internal predecessors, (120), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) [2025-01-10 01:31:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 209 transitions. [2025-01-10 01:31:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1226 [2025-01-10 01:31:52,023 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:31:52,023 INFO L218 NwaCegarLoop]: trace histogram [126, 123, 102, 63, 63, 63, 63, 62, 62, 62, 62, 62, 61, 61, 61, 60, 39, 24, 1, 1, 1, 1, 1, 1] [2025-01-10 01:31:52,031 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-10 01:31:52,224 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 [2025-01-10 01:31:52,224 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:31:52,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:31:52,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1473997941, now seen corresponding path program 9 times [2025-01-10 01:31:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:31:52,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161553516] [2025-01-10 01:31:52,225 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:31:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:31:52,255 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1225 statements into 91 equivalence classes. [2025-01-10 01:31:52,394 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) and asserted 835 of 1225 statements. [2025-01-10 01:31:52,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2025-01-10 01:31:52,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:32:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 16575 proven. 5936 refuted. 0 times theorem prover too weak. 32309 trivial. 0 not checked. [2025-01-10 01:32:01,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:32:01,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161553516] [2025-01-10 01:32:01,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161553516] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:32:01,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867068633] [2025-01-10 01:32:01,665 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 01:32:01,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:32:01,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:32:01,670 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) [2025-01-10 01:32:01,671 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 [2025-01-10 01:32:01,903 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1225 statements into 91 equivalence classes. [2025-01-10 01:32:02,112 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) and asserted 835 of 1225 statements. [2025-01-10 01:32:02,113 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2025-01-10 01:32:02,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:32:02,125 INFO L256 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 165 conjuncts are in the unsatisfiable core [2025-01-10 01:32:02,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:32:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 16360 proven. 4596 refuted. 0 times theorem prover too weak. 33864 trivial. 0 not checked. [2025-01-10 01:32:02,776 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:32:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 17227 proven. 4261 refuted. 0 times theorem prover too weak. 33332 trivial. 0 not checked. [2025-01-10 01:32:25,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867068633] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:32:25,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:32:25,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 38] total 53 [2025-01-10 01:32:25,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097426213] [2025-01-10 01:32:25,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:32:25,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-01-10 01:32:25,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:32:25,096 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-01-10 01:32:25,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=2219, Unknown=0, NotChecked=0, Total=2862 [2025-01-10 01:32:25,097 INFO L87 Difference]: Start difference. First operand 159 states and 209 transitions. Second operand has 54 states, 53 states have (on average 2.811320754716981) internal successors, (149), 54 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (39), 38 states have call predecessors, (39), 14 states have call successors, (39) [2025-01-10 01:32:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:32:25,426 INFO L93 Difference]: Finished difference Result 217 states and 320 transitions. [2025-01-10 01:32:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-01-10 01:32:25,426 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.811320754716981) internal successors, (149), 54 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (39), 38 states have call predecessors, (39), 14 states have call successors, (39) Word has length 1225 [2025-01-10 01:32:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:32:25,433 INFO L225 Difference]: With dead ends: 217 [2025-01-10 01:32:25,433 INFO L226 Difference]: Without dead ends: 216 [2025-01-10 01:32:25,434 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2621 GetRequests, 2442 SyntacticMatches, 119 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5524 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2025-01-10 01:32:25,435 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 01:32:25,435 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 223 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 01:32:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2025-01-10 01:32:25,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 177. [2025-01-10 01:32:25,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 142 states have (on average 1.028169014084507) internal successors, (146), 140 states have internal predecessors, (146), 22 states have call successors, (22), 14 states have call predecessors, (22), 12 states have return successors, (85), 22 states have call predecessors, (85), 21 states have call successors, (85) [2025-01-10 01:32:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2025-01-10 01:32:25,454 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 1225 [2025-01-10 01:32:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:32:25,456 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2025-01-10 01:32:25,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.811320754716981) internal successors, (149), 54 states have internal predecessors, (149), 14 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (39), 38 states have call predecessors, (39), 14 states have call successors, (39) [2025-01-10 01:32:25,457 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2025-01-10 01:32:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1893 [2025-01-10 01:32:25,476 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:32:25,476 INFO L218 NwaCegarLoop]: trace histogram [194, 191, 157, 97, 97, 97, 97, 96, 96, 96, 96, 96, 95, 95, 95, 94, 60, 37, 1, 1, 1, 1, 1, 1] [2025-01-10 01:32:25,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-01-10 01:32:25,677 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 [2025-01-10 01:32:25,677 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:32:25,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:32:25,678 INFO L85 PathProgramCache]: Analyzing trace with hash 411474357, now seen corresponding path program 10 times [2025-01-10 01:32:25,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:32:25,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803934702] [2025-01-10 01:32:25,678 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:32:25,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:32:25,715 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1892 statements into 2 equivalence classes. [2025-01-10 01:32:25,806 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1122 of 1892 statements. [2025-01-10 01:32:25,807 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:32:25,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:32:27,445 INFO L134 CoverageAnalysis]: Checked inductivity of 131581 backedges. 2374 proven. 15333 refuted. 0 times theorem prover too weak. 113874 trivial. 0 not checked. [2025-01-10 01:32:27,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:32:27,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803934702] [2025-01-10 01:32:27,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803934702] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:32:27,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270147538] [2025-01-10 01:32:27,445 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 01:32:27,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:32:27,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:32:27,447 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) [2025-01-10 01:32:27,449 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 [2025-01-10 01:32:27,876 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1892 statements into 2 equivalence classes. [2025-01-10 01:32:28,065 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1122 of 1892 statements. [2025-01-10 01:32:28,066 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 01:32:28,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:32:28,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 2345 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-10 01:32:28,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:32:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 131581 backedges. 67486 proven. 5564 refuted. 0 times theorem prover too weak. 58531 trivial. 0 not checked. [2025-01-10 01:32:28,284 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 01:32:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 131581 backedges. 2868 proven. 17973 refuted. 0 times theorem prover too weak. 110740 trivial. 0 not checked. [2025-01-10 01:32:32,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270147538] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 01:32:32,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 01:32:32,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 29] total 34 [2025-01-10 01:32:32,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101038125] [2025-01-10 01:32:32,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 01:32:32,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-01-10 01:32:32,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 01:32:32,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-01-10 01:32:32,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2025-01-10 01:32:32,335 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand has 34 states, 34 states have (on average 6.029411764705882) internal successors, (205), 34 states have internal predecessors, (205), 29 states have call successors, (36), 4 states have call predecessors, (36), 14 states have return successors, (43), 16 states have call predecessors, (43), 27 states have call successors, (43) [2025-01-10 01:32:32,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 01:32:32,940 INFO L93 Difference]: Finished difference Result 429 states and 706 transitions. [2025-01-10 01:32:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-01-10 01:32:32,941 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.029411764705882) internal successors, (205), 34 states have internal predecessors, (205), 29 states have call successors, (36), 4 states have call predecessors, (36), 14 states have return successors, (43), 16 states have call predecessors, (43), 27 states have call successors, (43) Word has length 1892 [2025-01-10 01:32:32,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 01:32:32,943 INFO L225 Difference]: With dead ends: 429 [2025-01-10 01:32:32,943 INFO L226 Difference]: Without dead ends: 259 [2025-01-10 01:32:32,946 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3849 GetRequests, 3765 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1170, Invalid=3522, Unknown=0, NotChecked=0, Total=4692 [2025-01-10 01:32:32,947 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 375 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 01:32:32,947 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 224 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 01:32:32,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2025-01-10 01:32:32,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 231. [2025-01-10 01:32:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 186 states have (on average 1.032258064516129) internal successors, (192), 183 states have internal predecessors, (192), 29 states have call successors, (29), 18 states have call predecessors, (29), 15 states have return successors, (110), 29 states have call predecessors, (110), 28 states have call successors, (110) [2025-01-10 01:32:32,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 331 transitions. [2025-01-10 01:32:32,968 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 331 transitions. Word has length 1892 [2025-01-10 01:32:32,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 01:32:32,969 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 331 transitions. [2025-01-10 01:32:32,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.029411764705882) internal successors, (205), 34 states have internal predecessors, (205), 29 states have call successors, (36), 4 states have call predecessors, (36), 14 states have return successors, (43), 16 states have call predecessors, (43), 27 states have call successors, (43) [2025-01-10 01:32:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 331 transitions. [2025-01-10 01:32:32,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1813 [2025-01-10 01:32:32,988 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 01:32:32,988 INFO L218 NwaCegarLoop]: trace histogram [187, 181, 152, 95, 95, 95, 95, 91, 91, 91, 91, 91, 90, 90, 90, 89, 57, 35, 1, 1, 1, 1, 1, 1] [2025-01-10 01:32:33,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-01-10 01:32:33,192 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 [2025-01-10 01:32:33,192 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 01:32:33,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 01:32:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2088906843, now seen corresponding path program 11 times [2025-01-10 01:32:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 01:32:33,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525555689] [2025-01-10 01:32:33,194 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:32:33,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 01:32:33,235 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1812 statements into 128 equivalence classes. [2025-01-10 01:32:33,389 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) and asserted 1089 of 1812 statements. [2025-01-10 01:32:33,389 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2025-01-10 01:32:33,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:32:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 120628 backedges. 10968 proven. 8068 refuted. 0 times theorem prover too weak. 101592 trivial. 0 not checked. [2025-01-10 01:32:34,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 01:32:34,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525555689] [2025-01-10 01:32:34,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525555689] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 01:32:34,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145051093] [2025-01-10 01:32:34,853 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 01:32:34,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 01:32:34,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 01:32:34,855 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) [2025-01-10 01:32:34,856 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 [2025-01-10 01:32:35,294 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1812 statements into 128 equivalence classes. [2025-01-10 01:32:35,573 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) and asserted 1089 of 1812 statements. [2025-01-10 01:32:35,574 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 76 check-sat command(s) [2025-01-10 01:32:35,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 01:32:35,580 INFO L256 TraceCheckSpWp]: Trace formula consists of 2013 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-10 01:32:35,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 01:32:35,805 INFO L134 CoverageAnalysis]: Checked inductivity of 120628 backedges. 60166 proven. 2661 refuted. 0 times theorem prover too weak. 57801 trivial. 0 not checked. [2025-01-10 01:32:35,805 INFO L312 TraceCheckSpWp]: Computing backward predicates...