./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Fibonacci05-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci05-overflow.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7348520f04d4d9b10e62396a3389d8f9a2f3fbd69eb8f1a8953214a9bb54eb76 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 14:30:26,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 14:30:26,301 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-02-06 14:30:26,304 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 14:30:26,304 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 14:30:26,326 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 14:30:26,326 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 14:30:26,326 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 14:30:26,327 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 14:30:26,327 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 14:30:26,327 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 14:30:26,327 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 14:30:26,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 14:30:26,327 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 14:30:26,327 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 14:30:26,327 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 14:30:26,327 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-06 14:30:26,327 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 14:30:26,328 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 14:30:26,329 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 14:30:26,329 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 14:30:26,329 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 14:30:26,330 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 14:30:26,330 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 14:30:26,330 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 14:30:26,330 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7348520f04d4d9b10e62396a3389d8f9a2f3fbd69eb8f1a8953214a9bb54eb76 [2025-02-06 14:30:26,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 14:30:26,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 14:30:26,573 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 14:30:26,574 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 14:30:26,574 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 14:30:26,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci05-overflow.c [2025-02-06 14:30:27,728 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/193329511/1b505d38bfa54df39356dd2d6017f153/FLAG1a89d86f5 [2025-02-06 14:30:27,956 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 14:30:27,956 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci05-overflow.c [2025-02-06 14:30:27,961 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/193329511/1b505d38bfa54df39356dd2d6017f153/FLAG1a89d86f5 [2025-02-06 14:30:28,296 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/193329511/1b505d38bfa54df39356dd2d6017f153 [2025-02-06 14:30:28,298 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 14:30:28,299 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 14:30:28,300 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 14:30:28,300 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 14:30:28,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 14:30:28,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,304 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b771b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28, skipping insertion in model container [2025-02-06 14:30:28,304 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,311 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 14:30:28,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 14:30:28,406 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 14:30:28,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 14:30:28,426 INFO L204 MainTranslator]: Completed translation [2025-02-06 14:30:28,426 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28 WrapperNode [2025-02-06 14:30:28,427 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 14:30:28,427 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 14:30:28,428 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 14:30:28,428 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 14:30:28,431 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,436 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,445 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2025-02-06 14:30:28,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 14:30:28,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 14:30:28,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 14:30:28,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 14:30:28,451 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,455 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,463 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-06 14:30:28,467 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,468 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,469 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,470 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,470 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,470 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,471 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 14:30:28,472 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 14:30:28,472 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 14:30:28,472 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 14:30:28,472 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (1/1) ... [2025-02-06 14:30:28,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 14:30:28,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:28,492 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 14:30:28,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 14:30:28,510 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-02-06 14:30:28,511 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-02-06 14:30:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 14:30:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 14:30:28,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 14:30:28,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 14:30:28,544 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 14:30:28,545 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 14:30:28,612 INFO L1309 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-02-06 14:30:28,645 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2025-02-06 14:30:28,645 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 14:30:28,651 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 14:30:28,654 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 14:30:28,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 02:30:28 BoogieIcfgContainer [2025-02-06 14:30:28,655 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 14:30:28,657 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 14:30:28,657 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 14:30:28,660 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 14:30:28,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 02:30:28" (1/3) ... [2025-02-06 14:30:28,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d30b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 02:30:28, skipping insertion in model container [2025-02-06 14:30:28,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 02:30:28" (2/3) ... [2025-02-06 14:30:28,662 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d30b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 02:30:28, skipping insertion in model container [2025-02-06 14:30:28,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 02:30:28" (3/3) ... [2025-02-06 14:30:28,663 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci05-overflow.c [2025-02-06 14:30:28,675 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 14:30:28,677 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci05-overflow.c that has 2 procedures, 31 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-02-06 14:30:28,720 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 14:30:28,730 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;@13c0e930, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 14:30:28,731 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-02-06 14:30:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.45) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-06 14:30:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-02-06 14:30:28,737 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:28,738 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:28,739 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:28,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:28,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1001399972, now seen corresponding path program 1 times [2025-02-06 14:30:28,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:28,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785444356] [2025-02-06 14:30:28,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:28,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:28,789 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 14:30:28,803 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 14:30:28,804 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:28,805 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 14:30:28,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785444356] [2025-02-06 14:30:28,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785444356] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:28,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 14:30:28,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 14:30:28,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818185787] [2025-02-06 14:30:28,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:28,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 14:30:28,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:28,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 14:30:28,891 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 14:30:28,892 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.45) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 14:30:28,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:28,921 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2025-02-06 14:30:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 14:30:28,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-02-06 14:30:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:28,926 INFO L225 Difference]: With dead ends: 36 [2025-02-06 14:30:28,926 INFO L226 Difference]: Without dead ends: 24 [2025-02-06 14:30:28,928 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 14:30:28,929 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:28,930 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:28,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-02-06 14:30:28,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2025-02-06 14:30:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.4285714285714286) 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) [2025-02-06 14:30:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2025-02-06 14:30:28,955 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2025-02-06 14:30:28,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:28,956 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2025-02-06 14:30:28,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 14:30:28,957 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2025-02-06 14:30:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-06 14:30:28,957 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:28,957 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:28,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 14:30:28,958 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:28,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash 978628045, now seen corresponding path program 1 times [2025-02-06 14:30:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:28,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851146696] [2025-02-06 14:30:28,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:28,963 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-06 14:30:28,969 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-06 14:30:28,970 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:28,970 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 14:30:29,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:29,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851146696] [2025-02-06 14:30:29,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851146696] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:29,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 14:30:29,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 14:30:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529365585] [2025-02-06 14:30:29,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:29,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 14:30:29,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:29,012 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 14:30:29,012 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 14:30:29,013 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 14:30:29,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:29,071 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2025-02-06 14:30:29,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 14:30:29,072 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-06 14:30:29,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:29,072 INFO L225 Difference]: With dead ends: 24 [2025-02-06 14:30:29,072 INFO L226 Difference]: Without dead ends: 22 [2025-02-06 14:30:29,072 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 14:30:29,073 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:29,073 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:29,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-02-06 14:30:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2025-02-06 14:30:29,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2025-02-06 14:30:29,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2025-02-06 14:30:29,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:29,081 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2025-02-06 14:30:29,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 14:30:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2025-02-06 14:30:29,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-02-06 14:30:29,082 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:29,082 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:29,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 14:30:29,082 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:29,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:29,085 INFO L85 PathProgramCache]: Analyzing trace with hash -989645326, now seen corresponding path program 1 times [2025-02-06 14:30:29,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:29,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931525292] [2025-02-06 14:30:29,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:29,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:29,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-06 14:30:29,102 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-06 14:30:29,102 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:29,102 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-06 14:30:29,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:29,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931525292] [2025-02-06 14:30:29,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931525292] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:29,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 14:30:29,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 14:30:29,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769109272] [2025-02-06 14:30:29,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:29,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 14:30:29,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:29,210 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 14:30:29,210 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 14:30:29,210 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:29,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:29,236 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2025-02-06 14:30:29,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 14:30:29,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 29 [2025-02-06 14:30:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:29,237 INFO L225 Difference]: With dead ends: 34 [2025-02-06 14:30:29,237 INFO L226 Difference]: Without dead ends: 32 [2025-02-06 14:30:29,237 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 14:30:29,238 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:29,238 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-02-06 14:30:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2025-02-06 14:30:29,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-06 14:30:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2025-02-06 14:30:29,248 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 29 [2025-02-06 14:30:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:29,248 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2025-02-06 14:30:29,249 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2025-02-06 14:30:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-06 14:30:29,249 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:29,249 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:29,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 14:30:29,250 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:29,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1650141125, now seen corresponding path program 1 times [2025-02-06 14:30:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:29,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591608708] [2025-02-06 14:30:29,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:29,260 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 14:30:29,268 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 14:30:29,268 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:29,269 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 14:30:29,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591608708] [2025-02-06 14:30:29,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591608708] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515714417] [2025-02-06 14:30:29,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:29,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:29,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:29,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:29,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 14:30:29,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-06 14:30:29,366 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 14:30:29,367 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:29,367 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:29,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-06 14:30:29,371 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 14:30:29,434 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 14:30:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515714417] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:29,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:29,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-02-06 14:30:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023034302] [2025-02-06 14:30:29,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:29,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-06 14:30:29,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:29,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-06 14:30:29,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-02-06 14:30:29,573 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-06 14:30:29,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:29,787 INFO L93 Difference]: Finished difference Result 90 states and 128 transitions. [2025-02-06 14:30:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 14:30:29,788 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 24 [2025-02-06 14:30:29,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:29,789 INFO L225 Difference]: With dead ends: 90 [2025-02-06 14:30:29,789 INFO L226 Difference]: Without dead ends: 64 [2025-02-06 14:30:29,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-02-06 14:30:29,791 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:29,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 94 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:29,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-02-06 14:30:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2025-02-06 14:30:29,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-06 14:30:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2025-02-06 14:30:29,798 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 24 [2025-02-06 14:30:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:29,798 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2025-02-06 14:30:29,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-06 14:30:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2025-02-06 14:30:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-06 14:30:29,799 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:29,799 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:29,805 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 14:30:30,003 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:30,003 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:30,004 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:30,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1771203833, now seen corresponding path program 2 times [2025-02-06 14:30:30,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:30,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712005045] [2025-02-06 14:30:30,004 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:30,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:30,009 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 14:30:30,013 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 14:30:30,013 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:30,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 14:30:30,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:30,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712005045] [2025-02-06 14:30:30,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712005045] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:30,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782231586] [2025-02-06 14:30:30,087 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:30,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:30,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:30,088 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:30,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 14:30:30,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-02-06 14:30:30,114 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-02-06 14:30:30,115 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:30,115 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-06 14:30:30,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:30,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-06 14:30:30,155 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 14:30:30,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782231586] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:30,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 14:30:30,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-02-06 14:30:30,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226815715] [2025-02-06 14:30:30,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:30,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 14:30:30,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:30,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 14:30:30,156 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 14:30:30,156 INFO L87 Difference]: Start difference. First operand 52 states and 67 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:30,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:30,181 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2025-02-06 14:30:30,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 14:30:30,181 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2025-02-06 14:30:30,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:30,183 INFO L225 Difference]: With dead ends: 59 [2025-02-06 14:30:30,183 INFO L226 Difference]: Without dead ends: 58 [2025-02-06 14:30:30,183 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-06 14:30:30,185 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:30,185 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:30,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-02-06 14:30:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2025-02-06 14:30:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 9 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-06 14:30:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2025-02-06 14:30:30,198 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 24 [2025-02-06 14:30:30,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:30,198 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2025-02-06 14:30:30,198 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), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:30,198 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2025-02-06 14:30:30,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-06 14:30:30,198 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:30,198 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 14:30:30,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:30,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:30,399 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:30,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:30,399 INFO L85 PathProgramCache]: Analyzing trace with hash -591075408, now seen corresponding path program 1 times [2025-02-06 14:30:30,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:30,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293028638] [2025-02-06 14:30:30,400 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:30,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:30,403 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 14:30:30,405 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 14:30:30,406 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:30,406 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-06 14:30:30,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293028638] [2025-02-06 14:30:30,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293028638] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787524230] [2025-02-06 14:30:30,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:30,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:30,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:30,465 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:30,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 14:30:30,487 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-06 14:30:30,495 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-06 14:30:30,495 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:30,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,495 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-06 14:30:30,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:30,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-06 14:30:30,533 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 14:30:30,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787524230] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 14:30:30,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 14:30:30,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-06 14:30:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532420213] [2025-02-06 14:30:30,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 14:30:30,534 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 14:30:30,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:30,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 14:30:30,538 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-06 14:30:30,538 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:30,565 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2025-02-06 14:30:30,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 14:30:30,565 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2025-02-06 14:30:30,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:30,566 INFO L225 Difference]: With dead ends: 81 [2025-02-06 14:30:30,566 INFO L226 Difference]: Without dead ends: 80 [2025-02-06 14:30:30,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-06 14:30:30,566 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:30,567 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:30,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-02-06 14:30:30,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2025-02-06 14:30:30,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (27), 11 states have call predecessors, (27), 7 states have call successors, (27) [2025-02-06 14:30:30,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2025-02-06 14:30:30,575 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 31 [2025-02-06 14:30:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:30,575 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2025-02-06 14:30:30,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-06 14:30:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2025-02-06 14:30:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-02-06 14:30:30,576 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:30,576 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] [2025-02-06 14:30:30,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:30,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:30,777 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:30,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:30,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1033276172, now seen corresponding path program 1 times [2025-02-06 14:30:30,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:30,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914599810] [2025-02-06 14:30:30,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:30,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:30,784 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-06 14:30:30,788 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 14:30:30,788 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:30,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,905 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-06 14:30:30,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:30,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914599810] [2025-02-06 14:30:30,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914599810] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:30,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997743188] [2025-02-06 14:30:30,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:30,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:30,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:30,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:30,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 14:30:30,932 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-02-06 14:30:30,942 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-02-06 14:30:30,942 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:30,942 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:30,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-06 14:30:30,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-06 14:30:30,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-06 14:30:31,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997743188] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:31,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:31,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-02-06 14:30:31,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869549] [2025-02-06 14:30:31,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:31,132 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 14:30:31,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:31,133 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 14:30:31,133 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-02-06 14:30:31,133 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-06 14:30:31,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:31,290 INFO L93 Difference]: Finished difference Result 140 states and 216 transitions. [2025-02-06 14:30:31,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-06 14:30:31,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 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 45 [2025-02-06 14:30:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:31,294 INFO L225 Difference]: With dead ends: 140 [2025-02-06 14:30:31,294 INFO L226 Difference]: Without dead ends: 138 [2025-02-06 14:30:31,294 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-02-06 14:30:31,295 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:31,295 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 183 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:31,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-02-06 14:30:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2025-02-06 14:30:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 11 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (66), 20 states have call predecessors, (66), 10 states have call successors, (66) [2025-02-06 14:30:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 158 transitions. [2025-02-06 14:30:31,322 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 158 transitions. Word has length 45 [2025-02-06 14:30:31,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:31,322 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 158 transitions. [2025-02-06 14:30:31,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-06 14:30:31,322 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 158 transitions. [2025-02-06 14:30:31,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-02-06 14:30:31,326 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:31,326 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] [2025-02-06 14:30:31,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:31,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-06 14:30:31,527 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:31,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1306687898, now seen corresponding path program 1 times [2025-02-06 14:30:31,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:31,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705853672] [2025-02-06 14:30:31,528 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:31,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:31,532 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-02-06 14:30:31,537 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-02-06 14:30:31,537 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:31,538 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 86 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-02-06 14:30:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705853672] [2025-02-06 14:30:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705853672] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971555977] [2025-02-06 14:30:31,678 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 14:30:31,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:31,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:31,680 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:31,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 14:30:31,705 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 83 statements into 1 equivalence classes. [2025-02-06 14:30:31,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 83 of 83 statements. [2025-02-06 14:30:31,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:31,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:31,731 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-06 14:30:31,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 50 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-06 14:30:31,805 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:32,077 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 50 proven. 95 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-02-06 14:30:32,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971555977] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:32,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:32,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 16 [2025-02-06 14:30:32,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502639274] [2025-02-06 14:30:32,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:32,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-06 14:30:32,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:32,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-06 14:30:32,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-02-06 14:30:32,078 INFO L87 Difference]: Start difference. First operand 97 states and 158 transitions. Second operand has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 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) [2025-02-06 14:30:32,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:32,221 INFO L93 Difference]: Finished difference Result 173 states and 298 transitions. [2025-02-06 14:30:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-06 14:30:32,222 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 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 83 [2025-02-06 14:30:32,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:32,223 INFO L225 Difference]: With dead ends: 173 [2025-02-06 14:30:32,223 INFO L226 Difference]: Without dead ends: 79 [2025-02-06 14:30:32,225 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2025-02-06 14:30:32,226 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:32,226 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 62 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-02-06 14:30:32,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2025-02-06 14:30:32,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 52 states have internal predecessors, (60), 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) [2025-02-06 14:30:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2025-02-06 14:30:32,241 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 83 [2025-02-06 14:30:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:32,242 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2025-02-06 14:30:32,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0625) internal successors, (81), 16 states have internal predecessors, (81), 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) [2025-02-06 14:30:32,242 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2025-02-06 14:30:32,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2025-02-06 14:30:32,245 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:32,246 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] [2025-02-06 14:30:32,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:32,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:32,446 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:32,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash 291534894, now seen corresponding path program 2 times [2025-02-06 14:30:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:32,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002768842] [2025-02-06 14:30:32,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:32,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:32,453 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 174 statements into 2 equivalence classes. [2025-02-06 14:30:32,463 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 174 of 174 statements. [2025-02-06 14:30:32,463 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:32,463 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 94 proven. 278 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2025-02-06 14:30:32,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:32,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002768842] [2025-02-06 14:30:32,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002768842] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055417996] [2025-02-06 14:30:32,601 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:32,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:32,602 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:32,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 14:30:32,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 174 statements into 2 equivalence classes. [2025-02-06 14:30:32,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 174 of 174 statements. [2025-02-06 14:30:32,660 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:32,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:32,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 14:30:32,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 449 proven. 15 refuted. 0 times theorem prover too weak. 557 trivial. 0 not checked. [2025-02-06 14:30:32,712 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 95 proven. 328 refuted. 0 times theorem prover too weak. 598 trivial. 0 not checked. [2025-02-06 14:30:32,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055417996] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:32,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:32,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2025-02-06 14:30:32,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994236499] [2025-02-06 14:30:32,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:32,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-06 14:30:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:32,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-06 14:30:32,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-06 14:30:32,975 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-02-06 14:30:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:33,049 INFO L93 Difference]: Finished difference Result 128 states and 178 transitions. [2025-02-06 14:30:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 14:30:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 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 174 [2025-02-06 14:30:33,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:33,050 INFO L225 Difference]: With dead ends: 128 [2025-02-06 14:30:33,050 INFO L226 Difference]: Without dead ends: 62 [2025-02-06 14:30:33,051 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 340 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-02-06 14:30:33,051 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:33,051 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 63 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-06 14:30:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2025-02-06 14:30:33,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 45 states have internal predecessors, (52), 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) [2025-02-06 14:30:33,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2025-02-06 14:30:33,057 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 174 [2025-02-06 14:30:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:33,058 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2025-02-06 14:30:33,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-02-06 14:30:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2025-02-06 14:30:33,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-02-06 14:30:33,059 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:33,059 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1] [2025-02-06 14:30:33,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:33,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-06 14:30:33,260 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:33,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1797592140, now seen corresponding path program 3 times [2025-02-06 14:30:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:33,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898343371] [2025-02-06 14:30:33,260 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:33,274 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 103 statements into 10 equivalence classes. [2025-02-06 14:30:33,286 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 70 of 103 statements. [2025-02-06 14:30:33,286 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-06 14:30:33,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 100 proven. 25 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2025-02-06 14:30:33,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:33,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898343371] [2025-02-06 14:30:33,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898343371] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:33,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194244727] [2025-02-06 14:30:33,432 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:33,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:33,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:33,434 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:33,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 14:30:33,460 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 103 statements into 10 equivalence classes. [2025-02-06 14:30:33,474 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 70 of 103 statements. [2025-02-06 14:30:33,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-02-06 14:30:33,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:33,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 14:30:33,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:33,560 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2025-02-06 14:30:33,560 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2025-02-06 14:30:33,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194244727] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:33,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:33,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2025-02-06 14:30:33,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287341816] [2025-02-06 14:30:33,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:33,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-06 14:30:33,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:33,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-06 14:30:33,881 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2025-02-06 14:30:33,881 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 20 states have internal predecessors, (61), 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) [2025-02-06 14:30:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:33,945 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2025-02-06 14:30:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-06 14:30:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 20 states have internal predecessors, (61), 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 103 [2025-02-06 14:30:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:33,946 INFO L225 Difference]: With dead ends: 63 [2025-02-06 14:30:33,946 INFO L226 Difference]: Without dead ends: 62 [2025-02-06 14:30:33,946 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 191 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2025-02-06 14:30:33,946 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:33,946 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 127 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-06 14:30:33,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-02-06 14:30:33,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2025-02-06 14:30:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.069767441860465) internal successors, (46), 42 states have internal predecessors, (46), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (14), 8 states have call predecessors, (14), 5 states have call successors, (14) [2025-02-06 14:30:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2025-02-06 14:30:33,953 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 103 [2025-02-06 14:30:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:33,953 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2025-02-06 14:30:33,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.210526315789474) internal successors, (61), 20 states have internal predecessors, (61), 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) [2025-02-06 14:30:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2025-02-06 14:30:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2025-02-06 14:30:33,954 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:33,954 INFO L218 NwaCegarLoop]: trace histogram [18, 15, 15, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1] [2025-02-06 14:30:33,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-06 14:30:34,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:34,155 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:34,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:34,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2131406242, now seen corresponding path program 2 times [2025-02-06 14:30:34,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:34,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398458492] [2025-02-06 14:30:34,156 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:34,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:34,160 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 164 statements into 2 equivalence classes. [2025-02-06 14:30:34,171 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 164 of 164 statements. [2025-02-06 14:30:34,171 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:34,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 120 proven. 355 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2025-02-06 14:30:34,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398458492] [2025-02-06 14:30:34,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398458492] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037629420] [2025-02-06 14:30:34,362 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:34,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:34,364 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:34,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-06 14:30:34,394 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 164 statements into 2 equivalence classes. [2025-02-06 14:30:34,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 164 of 164 statements. [2025-02-06 14:30:34,420 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:34,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:34,421 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 14:30:34,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 515 proven. 189 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2025-02-06 14:30:34,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 141 proven. 410 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2025-02-06 14:30:34,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037629420] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:34,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:34,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14] total 19 [2025-02-06 14:30:34,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19505441] [2025-02-06 14:30:34,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:34,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-02-06 14:30:34,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:34,907 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-02-06 14:30:34,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-02-06 14:30:34,908 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2025-02-06 14:30:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:35,109 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2025-02-06 14:30:35,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-06 14:30:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) Word has length 164 [2025-02-06 14:30:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:35,111 INFO L225 Difference]: With dead ends: 135 [2025-02-06 14:30:35,111 INFO L226 Difference]: Without dead ends: 85 [2025-02-06 14:30:35,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 319 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2025-02-06 14:30:35,112 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 151 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:35,112 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 77 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2025-02-06 14:30:35,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2025-02-06 14:30:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 56 states have internal predecessors, (63), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (17), 11 states have call predecessors, (17), 7 states have call successors, (17) [2025-02-06 14:30:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2025-02-06 14:30:35,117 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 164 [2025-02-06 14:30:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:35,117 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2025-02-06 14:30:35,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2025-02-06 14:30:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2025-02-06 14:30:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2025-02-06 14:30:35,118 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:35,118 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2025-02-06 14:30:35,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-06 14:30:35,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:35,324 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:35,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1623830502, now seen corresponding path program 3 times [2025-02-06 14:30:35,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:35,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223352057] [2025-02-06 14:30:35,325 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:35,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:35,328 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 8 equivalence classes. [2025-02-06 14:30:35,334 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 79 of 91 statements. [2025-02-06 14:30:35,334 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 14:30:35,334 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 102 proven. 38 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2025-02-06 14:30:35,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:35,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223352057] [2025-02-06 14:30:35,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223352057] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:35,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031933939] [2025-02-06 14:30:35,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:35,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:35,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:35,410 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:35,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-06 14:30:35,437 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 91 statements into 8 equivalence classes. [2025-02-06 14:30:35,452 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 79 of 91 statements. [2025-02-06 14:30:35,452 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-06 14:30:35,452 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:35,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-02-06 14:30:35,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:35,602 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-02-06 14:30:35,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-02-06 14:30:36,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031933939] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:36,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:36,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 13] total 30 [2025-02-06 14:30:36,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720492525] [2025-02-06 14:30:36,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:36,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 14:30:36,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:36,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 14:30:36,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2025-02-06 14:30:36,180 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 10 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (22), 19 states have call predecessors, (22), 10 states have call successors, (22) [2025-02-06 14:30:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:36,733 INFO L93 Difference]: Finished difference Result 192 states and 278 transitions. [2025-02-06 14:30:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-02-06 14:30:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 10 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (22), 19 states have call predecessors, (22), 10 states have call successors, (22) Word has length 91 [2025-02-06 14:30:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:36,734 INFO L225 Difference]: With dead ends: 192 [2025-02-06 14:30:36,734 INFO L226 Difference]: Without dead ends: 124 [2025-02-06 14:30:36,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 158 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=2709, Unknown=0, NotChecked=0, Total=3306 [2025-02-06 14:30:36,736 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 172 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:36,736 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 121 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-02-06 14:30:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2025-02-06 14:30:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 75 states have internal predecessors, (80), 11 states have call successors, (11), 5 states have call predecessors, (11), 9 states have return successors, (47), 16 states have call predecessors, (47), 10 states have call successors, (47) [2025-02-06 14:30:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 138 transitions. [2025-02-06 14:30:36,750 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 138 transitions. Word has length 91 [2025-02-06 14:30:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:36,751 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 138 transitions. [2025-02-06 14:30:36,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 10 states have call successors, (13), 1 states have call predecessors, (13), 12 states have return successors, (22), 19 states have call predecessors, (22), 10 states have call successors, (22) [2025-02-06 14:30:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 138 transitions. [2025-02-06 14:30:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2025-02-06 14:30:36,755 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:36,755 INFO L218 NwaCegarLoop]: trace histogram [33, 32, 26, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 10, 7, 1, 1, 1, 1] [2025-02-06 14:30:36,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:36,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:36,960 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:36,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash -2017069360, now seen corresponding path program 4 times [2025-02-06 14:30:36,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:36,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865848370] [2025-02-06 14:30:36,961 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:30:36,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:36,973 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 319 statements into 2 equivalence classes. [2025-02-06 14:30:36,986 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 189 of 319 statements. [2025-02-06 14:30:36,986 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 14:30:36,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 377 proven. 976 refuted. 0 times theorem prover too weak. 2220 trivial. 0 not checked. [2025-02-06 14:30:37,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:37,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865848370] [2025-02-06 14:30:37,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865848370] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:37,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924684048] [2025-02-06 14:30:37,168 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:30:37,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:37,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:37,170 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:37,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-06 14:30:37,217 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 319 statements into 2 equivalence classes. [2025-02-06 14:30:37,249 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 189 of 319 statements. [2025-02-06 14:30:37,249 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 14:30:37,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:37,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 14:30:37,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 359 proven. 1338 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2025-02-06 14:30:37,368 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 359 proven. 1377 refuted. 0 times theorem prover too weak. 1837 trivial. 0 not checked. [2025-02-06 14:30:38,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924684048] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:38,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:38,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 24 [2025-02-06 14:30:38,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956606802] [2025-02-06 14:30:38,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:38,244 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-06 14:30:38,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:38,245 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-06 14:30:38,245 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-02-06 14:30:38,245 INFO L87 Difference]: Start difference. First operand 97 states and 138 transitions. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 12 states have call predecessors, (28), 18 states have call successors, (28) [2025-02-06 14:30:38,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:38,549 INFO L93 Difference]: Finished difference Result 247 states and 397 transitions. [2025-02-06 14:30:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-02-06 14:30:38,550 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 18 states have call successors, (23), 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 319 [2025-02-06 14:30:38,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:38,551 INFO L225 Difference]: With dead ends: 247 [2025-02-06 14:30:38,552 INFO L226 Difference]: Without dead ends: 155 [2025-02-06 14:30:38,553 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 625 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2025-02-06 14:30:38,554 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 253 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:38,555 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 121 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:38,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-02-06 14:30:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 139. [2025-02-06 14:30:38,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 111 states have (on average 1.045045045045045) internal successors, (116), 107 states have internal predecessors, (116), 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) [2025-02-06 14:30:38,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 188 transitions. [2025-02-06 14:30:38,568 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 188 transitions. Word has length 319 [2025-02-06 14:30:38,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:38,568 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 188 transitions. [2025-02-06 14:30:38,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 18 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (28), 12 states have call predecessors, (28), 18 states have call successors, (28) [2025-02-06 14:30:38,569 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 188 transitions. [2025-02-06 14:30:38,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2025-02-06 14:30:38,571 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:38,571 INFO L218 NwaCegarLoop]: trace histogram [36, 34, 29, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 11, 7, 1, 1, 1, 1] [2025-02-06 14:30:38,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-06 14:30:38,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-06 14:30:38,773 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:38,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:38,773 INFO L85 PathProgramCache]: Analyzing trace with hash 585046834, now seen corresponding path program 5 times [2025-02-06 14:30:38,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:38,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042022824] [2025-02-06 14:30:38,773 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 14:30:38,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:38,782 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 345 statements into 27 equivalence classes. [2025-02-06 14:30:38,796 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 197 of 345 statements. [2025-02-06 14:30:38,796 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-02-06 14:30:38,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 734 proven. 1144 refuted. 0 times theorem prover too weak. 2321 trivial. 0 not checked. [2025-02-06 14:30:39,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:39,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042022824] [2025-02-06 14:30:39,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042022824] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:39,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597268756] [2025-02-06 14:30:39,029 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 14:30:39,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:39,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:39,031 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:39,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-06 14:30:39,087 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 345 statements into 27 equivalence classes. [2025-02-06 14:30:39,126 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 197 of 345 statements. [2025-02-06 14:30:39,126 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-02-06 14:30:39,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:39,127 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-02-06 14:30:39,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 740 proven. 1135 refuted. 0 times theorem prover too weak. 2324 trivial. 0 not checked. [2025-02-06 14:30:39,251 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 737 proven. 1177 refuted. 0 times theorem prover too weak. 2285 trivial. 0 not checked. [2025-02-06 14:30:40,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597268756] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:40,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:40,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 20] total 26 [2025-02-06 14:30:40,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697490615] [2025-02-06 14:30:40,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:40,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 14:30:40,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:40,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 14:30:40,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2025-02-06 14:30:40,187 INFO L87 Difference]: Start difference. First operand 139 states and 188 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 17 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 17 states have call successors, (27) [2025-02-06 14:30:40,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:40,496 INFO L93 Difference]: Finished difference Result 278 states and 427 transitions. [2025-02-06 14:30:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-02-06 14:30:40,496 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 17 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 17 states have call successors, (27) Word has length 345 [2025-02-06 14:30:40,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:40,497 INFO L225 Difference]: With dead ends: 278 [2025-02-06 14:30:40,497 INFO L226 Difference]: Without dead ends: 144 [2025-02-06 14:30:40,499 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 730 GetRequests, 679 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=519, Invalid=1373, Unknown=0, NotChecked=0, Total=1892 [2025-02-06 14:30:40,499 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 254 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:40,500 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 121 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:40,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2025-02-06 14:30:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 121. [2025-02-06 14:30:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 94 states have internal predecessors, (103), 14 states have call successors, (14), 11 states have call predecessors, (14), 8 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2025-02-06 14:30:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2025-02-06 14:30:40,506 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 345 [2025-02-06 14:30:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:40,507 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2025-02-06 14:30:40,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 17 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 17 states have call successors, (27) [2025-02-06 14:30:40,507 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2025-02-06 14:30:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2025-02-06 14:30:40,508 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:40,508 INFO L218 NwaCegarLoop]: trace histogram [28, 26, 23, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 9, 5, 1, 1, 1, 1] [2025-02-06 14:30:40,525 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-06 14:30:40,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-06 14:30:40,713 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:40,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash 303395512, now seen corresponding path program 6 times [2025-02-06 14:30:40,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:40,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305830129] [2025-02-06 14:30:40,714 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 14:30:40,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:40,720 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 267 statements into 20 equivalence classes. [2025-02-06 14:30:40,732 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 190 of 267 statements. [2025-02-06 14:30:40,732 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-02-06 14:30:40,732 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 526 proven. 695 refuted. 0 times theorem prover too weak. 1257 trivial. 0 not checked. [2025-02-06 14:30:40,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:40,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305830129] [2025-02-06 14:30:40,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305830129] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:40,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115213067] [2025-02-06 14:30:40,916 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 14:30:40,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:40,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:40,918 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:40,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-06 14:30:40,968 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 267 statements into 20 equivalence classes. [2025-02-06 14:30:41,000 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 190 of 267 statements. [2025-02-06 14:30:41,001 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-02-06 14:30:41,001 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:41,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-06 14:30:41,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 519 proven. 734 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2025-02-06 14:30:41,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 515 proven. 786 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2025-02-06 14:30:42,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115213067] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:42,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:42,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 18] total 26 [2025-02-06 14:30:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633424448] [2025-02-06 14:30:42,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:42,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-02-06 14:30:42,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:42,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-02-06 14:30:42,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2025-02-06 14:30:42,099 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 19 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 14 states have call predecessors, (30), 19 states have call successors, (30) [2025-02-06 14:30:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:42,317 INFO L93 Difference]: Finished difference Result 245 states and 326 transitions. [2025-02-06 14:30:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-06 14:30:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 19 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 14 states have call predecessors, (30), 19 states have call successors, (30) Word has length 267 [2025-02-06 14:30:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:42,318 INFO L225 Difference]: With dead ends: 245 [2025-02-06 14:30:42,318 INFO L226 Difference]: Without dead ends: 129 [2025-02-06 14:30:42,319 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 518 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2025-02-06 14:30:42,319 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 92 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:42,320 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 195 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:42,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2025-02-06 14:30:42,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2025-02-06 14:30:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 100 states have internal predecessors, (107), 16 states have call successors, (16), 14 states have call predecessors, (16), 7 states have return successors, (30), 12 states have call predecessors, (30), 15 states have call successors, (30) [2025-02-06 14:30:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2025-02-06 14:30:42,326 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 267 [2025-02-06 14:30:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:42,327 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2025-02-06 14:30:42,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.423076923076923) internal successors, (141), 26 states have internal predecessors, (141), 19 states have call successors, (24), 1 states have call predecessors, (24), 10 states have return successors, (30), 14 states have call predecessors, (30), 19 states have call successors, (30) [2025-02-06 14:30:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2025-02-06 14:30:42,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2025-02-06 14:30:42,331 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:42,331 INFO L218 NwaCegarLoop]: trace histogram [52, 50, 42, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 24, 16, 10, 1, 1, 1, 1] [2025-02-06 14:30:42,339 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-06 14:30:42,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:42,536 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:42,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:42,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2064975301, now seen corresponding path program 7 times [2025-02-06 14:30:42,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:42,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815769887] [2025-02-06 14:30:42,536 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 14:30:42,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:42,545 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 502 statements into 1 equivalence classes. [2025-02-06 14:30:42,563 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 502 of 502 statements. [2025-02-06 14:30:42,564 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:42,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1125 proven. 2452 refuted. 0 times theorem prover too weak. 5461 trivial. 0 not checked. [2025-02-06 14:30:43,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:43,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815769887] [2025-02-06 14:30:43,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815769887] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:43,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836023830] [2025-02-06 14:30:43,019 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 14:30:43,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:43,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:43,021 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:43,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-06 14:30:43,090 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 502 statements into 1 equivalence classes. [2025-02-06 14:30:43,151 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 502 of 502 statements. [2025-02-06 14:30:43,151 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:30:43,151 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:43,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-02-06 14:30:43,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1330 proven. 2649 refuted. 0 times theorem prover too weak. 5059 trivial. 0 not checked. [2025-02-06 14:30:43,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1330 proven. 2764 refuted. 0 times theorem prover too weak. 4944 trivial. 0 not checked. [2025-02-06 14:30:44,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836023830] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:44,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:44,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 27] total 32 [2025-02-06 14:30:44,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438204697] [2025-02-06 14:30:44,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:44,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-02-06 14:30:44,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:44,976 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-02-06 14:30:44,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2025-02-06 14:30:44,977 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 32 states, 32 states have (on average 5.40625) internal successors, (173), 32 states have internal predecessors, (173), 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) [2025-02-06 14:30:45,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:45,394 INFO L93 Difference]: Finished difference Result 288 states and 373 transitions. [2025-02-06 14:30:45,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-06 14:30:45,394 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.40625) internal successors, (173), 32 states have internal predecessors, (173), 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 502 [2025-02-06 14:30:45,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:45,396 INFO L225 Difference]: With dead ends: 288 [2025-02-06 14:30:45,396 INFO L226 Difference]: Without dead ends: 166 [2025-02-06 14:30:45,397 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1055 GetRequests, 986 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=824, Invalid=2482, Unknown=0, NotChecked=0, Total=3306 [2025-02-06 14:30:45,397 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 524 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:45,397 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 186 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:30:45,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-02-06 14:30:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 124. [2025-02-06 14:30:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 98 states have internal predecessors, (102), 16 states have call successors, (16), 12 states have call predecessors, (16), 8 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) [2025-02-06 14:30:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 153 transitions. [2025-02-06 14:30:45,404 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 153 transitions. Word has length 502 [2025-02-06 14:30:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:45,405 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 153 transitions. [2025-02-06 14:30:45,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.40625) internal successors, (173), 32 states have internal predecessors, (173), 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) [2025-02-06 14:30:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 153 transitions. [2025-02-06 14:30:45,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2025-02-06 14:30:45,407 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:45,407 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] [2025-02-06 14:30:45,414 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-02-06 14:30:45,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:45,607 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:45,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:45,608 INFO L85 PathProgramCache]: Analyzing trace with hash -929567143, now seen corresponding path program 8 times [2025-02-06 14:30:45,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:45,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256020123] [2025-02-06 14:30:45,608 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:45,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:45,616 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 398 statements into 2 equivalence classes. [2025-02-06 14:30:45,641 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 398 of 398 statements. [2025-02-06 14:30:45,641 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:45,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 830 proven. 1470 refuted. 0 times theorem prover too weak. 3328 trivial. 0 not checked. [2025-02-06 14:30:47,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:47,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256020123] [2025-02-06 14:30:47,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256020123] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:47,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786054467] [2025-02-06 14:30:47,092 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:30:47,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:47,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:47,095 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:47,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-06 14:30:47,185 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 398 statements into 2 equivalence classes. [2025-02-06 14:30:47,248 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 398 of 398 statements. [2025-02-06 14:30:47,248 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:30:47,248 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:47,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-02-06 14:30:47,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:30:47,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2025-02-06 14:30:47,569 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:30:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 1149 proven. 1015 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2025-02-06 14:30:52,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786054467] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:30:52,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:30:52,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 45 [2025-02-06 14:30:52,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107170035] [2025-02-06 14:30:52,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:30:52,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-02-06 14:30:52,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:30:52,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-02-06 14:30:52,121 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2025-02-06 14:30:52,122 INFO L87 Difference]: Start difference. First operand 124 states and 153 transitions. Second operand has 46 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 46 states have internal predecessors, (118), 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) [2025-02-06 14:30:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:30:52,251 INFO L93 Difference]: Finished difference Result 155 states and 207 transitions. [2025-02-06 14:30:52,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-06 14:30:52,251 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 46 states have internal predecessors, (118), 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 398 [2025-02-06 14:30:52,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:30:52,253 INFO L225 Difference]: With dead ends: 155 [2025-02-06 14:30:52,253 INFO L226 Difference]: Without dead ends: 154 [2025-02-06 14:30:52,253 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 780 SyntacticMatches, 51 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=544, Invalid=1906, Unknown=0, NotChecked=0, Total=2450 [2025-02-06 14:30:52,254 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:30:52,254 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 143 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:30:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-02-06 14:30:52,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2025-02-06 14:30:52,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 114 states have internal predecessors, (119), 18 states have call successors, (18), 12 states have call predecessors, (18), 10 states have return successors, (55), 18 states have call predecessors, (55), 17 states have call successors, (55) [2025-02-06 14:30:52,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2025-02-06 14:30:52,261 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 398 [2025-02-06 14:30:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:30:52,263 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2025-02-06 14:30:52,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.6222222222222222) internal successors, (118), 46 states have internal predecessors, (118), 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) [2025-02-06 14:30:52,263 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2025-02-06 14:30:52,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1224 [2025-02-06 14:30:52,271 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:30:52,271 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] [2025-02-06 14:30:52,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-06 14:30:52,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-06 14:30:52,472 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:30:52,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:30:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1953987503, now seen corresponding path program 9 times [2025-02-06 14:30:52,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:30:52,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003877824] [2025-02-06 14:30:52,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:52,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:30:52,502 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1223 statements into 98 equivalence classes. [2025-02-06 14:30:52,585 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) and asserted 832 of 1223 statements. [2025-02-06 14:30:52,585 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2025-02-06 14:30:52,585 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:30:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 16724 proven. 5858 refuted. 0 times theorem prover too weak. 32238 trivial. 0 not checked. [2025-02-06 14:30:59,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:30:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003877824] [2025-02-06 14:30:59,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003877824] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:30:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228739656] [2025-02-06 14:30:59,904 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 14:30:59,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:30:59,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:30:59,906 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:30:59,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-06 14:31:00,077 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1223 statements into 98 equivalence classes. [2025-02-06 14:31:00,280 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) and asserted 832 of 1223 statements. [2025-02-06 14:31:00,280 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 65 check-sat command(s) [2025-02-06 14:31:00,280 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:00,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 1560 conjuncts, 165 conjuncts are in the unsatisfiable core [2025-02-06 14:31:00,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 16360 proven. 4596 refuted. 0 times theorem prover too weak. 33864 trivial. 0 not checked. [2025-02-06 14:31:00,798 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:31:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 17227 proven. 4261 refuted. 0 times theorem prover too weak. 33332 trivial. 0 not checked. [2025-02-06 14:31:18,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228739656] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:31:18,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:31:18,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 21, 38] total 52 [2025-02-06 14:31:18,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937198454] [2025-02-06 14:31:18,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:31:18,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-02-06 14:31:18,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:31:18,271 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-02-06 14:31:18,272 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=2149, Unknown=0, NotChecked=0, Total=2756 [2025-02-06 14:31:18,272 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 53 states have internal predecessors, (144), 14 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (38), 37 states have call predecessors, (38), 14 states have call successors, (38) [2025-02-06 14:31:18,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:31:18,470 INFO L93 Difference]: Finished difference Result 203 states and 303 transitions. [2025-02-06 14:31:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-02-06 14:31:18,471 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 53 states have internal predecessors, (144), 14 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (38), 37 states have call predecessors, (38), 14 states have call successors, (38) Word has length 1223 [2025-02-06 14:31:18,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:31:18,473 INFO L225 Difference]: With dead ends: 203 [2025-02-06 14:31:18,473 INFO L226 Difference]: Without dead ends: 202 [2025-02-06 14:31:18,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2617 GetRequests, 2415 SyntacticMatches, 143 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6256 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=784, Invalid=2876, Unknown=0, NotChecked=0, Total=3660 [2025-02-06 14:31:18,475 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-06 14:31:18,475 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 245 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-06 14:31:18,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2025-02-06 14:31:18,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 163. [2025-02-06 14:31:18,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 130 states have (on average 1.023076923076923) internal successors, (133), 128 states have internal predecessors, (133), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (83), 22 states have call predecessors, (83), 19 states have call successors, (83) [2025-02-06 14:31:18,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 236 transitions. [2025-02-06 14:31:18,484 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 236 transitions. Word has length 1223 [2025-02-06 14:31:18,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:31:18,485 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 236 transitions. [2025-02-06 14:31:18,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 2.769230769230769) internal successors, (144), 53 states have internal predecessors, (144), 14 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (38), 37 states have call predecessors, (38), 14 states have call successors, (38) [2025-02-06 14:31:18,485 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 236 transitions. [2025-02-06 14:31:18,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1799 [2025-02-06 14:31:18,497 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:31:18,497 INFO L218 NwaCegarLoop]: trace histogram [185, 181, 150, 93, 93, 93, 93, 91, 91, 91, 91, 91, 90, 90, 90, 89, 57, 35, 1, 1, 1, 1] [2025-02-06 14:31:18,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-02-06 14:31:18,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-06 14:31:18,698 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:31:18,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:31:18,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1036138088, now seen corresponding path program 10 times [2025-02-06 14:31:18,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:31:18,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313260601] [2025-02-06 14:31:18,699 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:31:18,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:31:18,725 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1798 statements into 2 equivalence classes. [2025-02-06 14:31:18,798 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1067 of 1798 statements. [2025-02-06 14:31:18,799 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 14:31:18,799 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 119024 backedges. 2418 proven. 14377 refuted. 0 times theorem prover too weak. 102229 trivial. 0 not checked. [2025-02-06 14:31:19,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:31:19,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313260601] [2025-02-06 14:31:19,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313260601] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:31:19,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189768271] [2025-02-06 14:31:19,950 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 14:31:19,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:19,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:31:19,952 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:31:19,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-06 14:31:20,288 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1798 statements into 2 equivalence classes. [2025-02-06 14:31:20,421 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1067 of 1798 statements. [2025-02-06 14:31:20,421 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-06 14:31:20,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:20,427 INFO L256 TraceCheckSpWp]: Trace formula consists of 2231 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-06 14:31:20,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:20,622 INFO L134 CoverageAnalysis]: Checked inductivity of 119024 backedges. 62023 proven. 5564 refuted. 0 times theorem prover too weak. 51437 trivial. 0 not checked. [2025-02-06 14:31:20,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:31:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 119024 backedges. 2922 proven. 16841 refuted. 0 times theorem prover too weak. 99261 trivial. 0 not checked. [2025-02-06 14:31:23,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189768271] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:31:23,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:31:23,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 29] total 34 [2025-02-06 14:31:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236433768] [2025-02-06 14:31:23,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:31:23,655 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2025-02-06 14:31:23,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:31:23,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2025-02-06 14:31:23,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=947, Unknown=0, NotChecked=0, Total=1122 [2025-02-06 14:31:23,656 INFO L87 Difference]: Start difference. First operand 163 states and 236 transitions. Second operand has 34 states, 34 states have (on average 5.970588235294118) internal successors, (203), 34 states have internal predecessors, (203), 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) [2025-02-06 14:31:24,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:31:24,114 INFO L93 Difference]: Finished difference Result 412 states and 683 transitions. [2025-02-06 14:31:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-06 14:31:24,115 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.970588235294118) internal successors, (203), 34 states have internal predecessors, (203), 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 1798 [2025-02-06 14:31:24,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:31:24,117 INFO L225 Difference]: With dead ends: 412 [2025-02-06 14:31:24,117 INFO L226 Difference]: Without dead ends: 254 [2025-02-06 14:31:24,119 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3661 GetRequests, 3577 SyntacticMatches, 17 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1170, Invalid=3522, Unknown=0, NotChecked=0, Total=4692 [2025-02-06 14:31:24,120 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 303 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:31:24,120 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 184 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:31:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2025-02-06 14:31:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 220. [2025-02-06 14:31:24,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 173 states have internal predecessors, (182), 27 states have call successors, (27), 17 states have call predecessors, (27), 15 states have return successors, (108), 29 states have call predecessors, (108), 26 states have call successors, (108) [2025-02-06 14:31:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 317 transitions. [2025-02-06 14:31:24,132 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 317 transitions. Word has length 1798 [2025-02-06 14:31:24,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:31:24,132 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 317 transitions. [2025-02-06 14:31:24,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.970588235294118) internal successors, (203), 34 states have internal predecessors, (203), 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) [2025-02-06 14:31:24,132 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 317 transitions. [2025-02-06 14:31:24,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1543 [2025-02-06 14:31:24,142 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:31:24,143 INFO L218 NwaCegarLoop]: trace histogram [158, 156, 128, 79, 79, 79, 79, 78, 78, 78, 78, 78, 78, 78, 78, 77, 49, 30, 1, 1, 1, 1] [2025-02-06 14:31:24,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-06 14:31:24,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:24,343 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:31:24,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:31:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2055829271, now seen corresponding path program 11 times [2025-02-06 14:31:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:31:24,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563911585] [2025-02-06 14:31:24,344 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 14:31:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:31:24,368 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1542 statements into 116 equivalence classes. [2025-02-06 14:31:24,460 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) and asserted 1226 of 1542 statements. [2025-02-06 14:31:24,460 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2025-02-06 14:31:24,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:25,605 INFO L134 CoverageAnalysis]: Checked inductivity of 87378 backedges. 3712 proven. 10547 refuted. 0 times theorem prover too weak. 73119 trivial. 0 not checked. [2025-02-06 14:31:25,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:31:25,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563911585] [2025-02-06 14:31:25,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563911585] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:31:25,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210377724] [2025-02-06 14:31:25,605 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 14:31:25,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:25,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:31:25,607 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:31:25,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-06 14:31:25,956 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1542 statements into 116 equivalence classes. [2025-02-06 14:31:26,273 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) and asserted 1226 of 1542 statements. [2025-02-06 14:31:26,273 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 92 check-sat command(s) [2025-02-06 14:31:26,273 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:26,279 INFO L256 TraceCheckSpWp]: Trace formula consists of 2267 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 14:31:26,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:26,400 INFO L134 CoverageAnalysis]: Checked inductivity of 87378 backedges. 43676 proven. 1268 refuted. 0 times theorem prover too weak. 42434 trivial. 0 not checked. [2025-02-06 14:31:26,400 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:31:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 87378 backedges. 3627 proven. 10028 refuted. 0 times theorem prover too weak. 73723 trivial. 0 not checked. [2025-02-06 14:31:29,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210377724] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:31:29,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:31:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 23] total 29 [2025-02-06 14:31:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166755143] [2025-02-06 14:31:29,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:31:29,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-02-06 14:31:29,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:31:29,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-02-06 14:31:29,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2025-02-06 14:31:29,193 INFO L87 Difference]: Start difference. First operand 220 states and 317 transitions. Second operand has 29 states, 29 states have (on average 5.793103448275862) internal successors, (168), 29 states have internal predecessors, (168), 21 states have call successors, (29), 2 states have call predecessors, (29), 13 states have return successors, (37), 16 states have call predecessors, (37), 21 states have call successors, (37) [2025-02-06 14:31:29,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:31:29,478 INFO L93 Difference]: Finished difference Result 420 states and 625 transitions. [2025-02-06 14:31:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-02-06 14:31:29,479 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.793103448275862) internal successors, (168), 29 states have internal predecessors, (168), 21 states have call successors, (29), 2 states have call predecessors, (29), 13 states have return successors, (37), 16 states have call predecessors, (37), 21 states have call successors, (37) Word has length 1542 [2025-02-06 14:31:29,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:31:29,481 INFO L225 Difference]: With dead ends: 420 [2025-02-06 14:31:29,481 INFO L226 Difference]: Without dead ends: 205 [2025-02-06 14:31:29,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3125 GetRequests, 3070 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=535, Invalid=1535, Unknown=0, NotChecked=0, Total=2070 [2025-02-06 14:31:29,483 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 190 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-06 14:31:29,483 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 204 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-06 14:31:29,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2025-02-06 14:31:29,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 181. [2025-02-06 14:31:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 143 states have internal predecessors, (150), 23 states have call successors, (23), 17 states have call predecessors, (23), 11 states have return successors, (61), 20 states have call predecessors, (61), 22 states have call successors, (61) [2025-02-06 14:31:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 234 transitions. [2025-02-06 14:31:29,493 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 234 transitions. Word has length 1542 [2025-02-06 14:31:29,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:31:29,493 INFO L471 AbstractCegarLoop]: Abstraction has 181 states and 234 transitions. [2025-02-06 14:31:29,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.793103448275862) internal successors, (168), 29 states have internal predecessors, (168), 21 states have call successors, (29), 2 states have call predecessors, (29), 13 states have return successors, (37), 16 states have call predecessors, (37), 21 states have call successors, (37) [2025-02-06 14:31:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 234 transitions. [2025-02-06 14:31:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1983 [2025-02-06 14:31:29,508 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:31:29,509 INFO L218 NwaCegarLoop]: trace histogram [203, 201, 164, 101, 101, 101, 101, 101, 101, 101, 101, 101, 100, 100, 100, 99, 63, 39, 1, 1, 1, 1] [2025-02-06 14:31:29,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-02-06 14:31:29,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:29,709 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:31:29,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:31:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1237231386, now seen corresponding path program 12 times [2025-02-06 14:31:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:31:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706452946] [2025-02-06 14:31:29,710 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 14:31:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:31:29,738 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1982 statements into 157 equivalence classes. [2025-02-06 14:31:29,846 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) and asserted 1278 of 1982 statements. [2025-02-06 14:31:29,846 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) [2025-02-06 14:31:29,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:31,770 INFO L134 CoverageAnalysis]: Checked inductivity of 144772 backedges. 6334 proven. 16825 refuted. 0 times theorem prover too weak. 121613 trivial. 0 not checked. [2025-02-06 14:31:31,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:31:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706452946] [2025-02-06 14:31:31,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706452946] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:31:31,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738543953] [2025-02-06 14:31:31,770 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-06 14:31:31,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:31,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:31:31,772 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:31:31,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-06 14:31:32,137 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1982 statements into 157 equivalence classes. [2025-02-06 14:31:32,474 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) and asserted 1278 of 1982 statements. [2025-02-06 14:31:32,474 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) [2025-02-06 14:31:32,474 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:32,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 2375 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-06 14:31:32,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 144772 backedges. 70758 proven. 9071 refuted. 0 times theorem prover too weak. 64943 trivial. 0 not checked. [2025-02-06 14:31:32,675 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:31:36,421 INFO L134 CoverageAnalysis]: Checked inductivity of 144772 backedges. 6643 proven. 17634 refuted. 0 times theorem prover too weak. 120495 trivial. 0 not checked. [2025-02-06 14:31:36,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738543953] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:31:36,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:31:36,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20, 32] total 37 [2025-02-06 14:31:36,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665116219] [2025-02-06 14:31:36,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:31:36,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-06 14:31:36,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:31:36,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-06 14:31:36,424 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2025-02-06 14:31:36,425 INFO L87 Difference]: Start difference. First operand 181 states and 234 transitions. Second operand has 37 states, 37 states have (on average 6.027027027027027) internal successors, (223), 37 states have internal predecessors, (223), 32 states have call successors, (39), 3 states have call predecessors, (39), 16 states have return successors, (48), 18 states have call predecessors, (48), 31 states have call successors, (48) [2025-02-06 14:31:37,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:31:37,049 INFO L93 Difference]: Finished difference Result 442 states and 598 transitions. [2025-02-06 14:31:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2025-02-06 14:31:37,050 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.027027027027027) internal successors, (223), 37 states have internal predecessors, (223), 32 states have call successors, (39), 3 states have call predecessors, (39), 16 states have return successors, (48), 18 states have call predecessors, (48), 31 states have call successors, (48) Word has length 1982 [2025-02-06 14:31:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:31:37,053 INFO L225 Difference]: With dead ends: 442 [2025-02-06 14:31:37,053 INFO L226 Difference]: Without dead ends: 266 [2025-02-06 14:31:37,055 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4039 GetRequests, 3947 SyntacticMatches, 17 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1427, Invalid=4425, Unknown=0, NotChecked=0, Total=5852 [2025-02-06 14:31:37,056 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 450 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 14:31:37,056 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 235 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 14:31:37,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2025-02-06 14:31:37,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 208. [2025-02-06 14:31:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 169 states have (on average 1.029585798816568) internal successors, (174), 165 states have internal predecessors, (174), 27 states have call successors, (27), 22 states have call predecessors, (27), 11 states have return successors, (67), 20 states have call predecessors, (67), 26 states have call successors, (67) [2025-02-06 14:31:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 268 transitions. [2025-02-06 14:31:37,070 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 268 transitions. Word has length 1982 [2025-02-06 14:31:37,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:31:37,071 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 268 transitions. [2025-02-06 14:31:37,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.027027027027027) internal successors, (223), 37 states have internal predecessors, (223), 32 states have call successors, (39), 3 states have call predecessors, (39), 16 states have return successors, (48), 18 states have call predecessors, (48), 31 states have call successors, (48) [2025-02-06 14:31:37,072 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 268 transitions. [2025-02-06 14:31:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1321 [2025-02-06 14:31:37,080 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:31:37,080 INFO L218 NwaCegarLoop]: trace histogram [135, 134, 109, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 66, 42, 26, 1, 1, 1, 1] [2025-02-06 14:31:37,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-06 14:31:37,281 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:37,281 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:31:37,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:31:37,282 INFO L85 PathProgramCache]: Analyzing trace with hash -340997757, now seen corresponding path program 13 times [2025-02-06 14:31:37,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:31:37,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878939243] [2025-02-06 14:31:37,282 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 14:31:37,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:31:37,304 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1320 statements into 1 equivalence classes. [2025-02-06 14:31:37,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1320 of 1320 statements. [2025-02-06 14:31:37,359 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:31:37,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:38,789 INFO L134 CoverageAnalysis]: Checked inductivity of 63908 backedges. 6687 proven. 4120 refuted. 0 times theorem prover too weak. 53101 trivial. 0 not checked. [2025-02-06 14:31:38,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:31:38,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878939243] [2025-02-06 14:31:38,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878939243] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:31:38,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137312926] [2025-02-06 14:31:38,790 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-06 14:31:38,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:38,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:31:38,791 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:31:38,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-06 14:31:39,156 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1320 statements into 1 equivalence classes. [2025-02-06 14:31:39,307 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1320 of 1320 statements. [2025-02-06 14:31:39,307 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 14:31:39,307 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:39,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 2459 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-02-06 14:31:39,323 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 63908 backedges. 6371 proven. 8792 refuted. 0 times theorem prover too weak. 48745 trivial. 0 not checked. [2025-02-06 14:31:39,535 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 14:31:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 63908 backedges. 6367 proven. 8995 refuted. 0 times theorem prover too weak. 48546 trivial. 0 not checked. [2025-02-06 14:31:43,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137312926] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 14:31:43,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 14:31:43,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 32] total 39 [2025-02-06 14:31:43,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849409573] [2025-02-06 14:31:43,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 14:31:43,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-02-06 14:31:43,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 14:31:43,193 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-02-06 14:31:43,193 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2025-02-06 14:31:43,193 INFO L87 Difference]: Start difference. First operand 208 states and 268 transitions. Second operand has 39 states, 39 states have (on average 5.512820512820513) internal successors, (215), 39 states have internal predecessors, (215), 32 states have call successors, (37), 1 states have call predecessors, (37), 16 states have return successors, (52), 20 states have call predecessors, (52), 32 states have call successors, (52) [2025-02-06 14:31:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-06 14:31:43,618 INFO L93 Difference]: Finished difference Result 455 states and 629 transitions. [2025-02-06 14:31:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-02-06 14:31:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.512820512820513) internal successors, (215), 39 states have internal predecessors, (215), 32 states have call successors, (37), 1 states have call predecessors, (37), 16 states have return successors, (52), 20 states have call predecessors, (52), 32 states have call successors, (52) Word has length 1320 [2025-02-06 14:31:43,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-06 14:31:43,621 INFO L225 Difference]: With dead ends: 455 [2025-02-06 14:31:43,621 INFO L226 Difference]: Without dead ends: 252 [2025-02-06 14:31:43,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2686 GetRequests, 2611 SyntacticMatches, 16 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=902, Invalid=2758, Unknown=0, NotChecked=0, Total=3660 [2025-02-06 14:31:43,626 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 199 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-06 14:31:43,627 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 351 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-06 14:31:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2025-02-06 14:31:43,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 208. [2025-02-06 14:31:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 169 states have (on average 1.0236686390532543) internal successors, (173), 166 states have internal predecessors, (173), 28 states have call successors, (28), 23 states have call predecessors, (28), 10 states have return successors, (63), 18 states have call predecessors, (63), 27 states have call successors, (63) [2025-02-06 14:31:43,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 264 transitions. [2025-02-06 14:31:43,641 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 264 transitions. Word has length 1320 [2025-02-06 14:31:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-06 14:31:43,642 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 264 transitions. [2025-02-06 14:31:43,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.512820512820513) internal successors, (215), 39 states have internal predecessors, (215), 32 states have call successors, (37), 1 states have call predecessors, (37), 16 states have return successors, (52), 20 states have call predecessors, (52), 32 states have call successors, (52) [2025-02-06 14:31:43,644 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 264 transitions. [2025-02-06 14:31:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2813 [2025-02-06 14:31:43,672 INFO L210 NwaCegarLoop]: Found error trace [2025-02-06 14:31:43,672 INFO L218 NwaCegarLoop]: trace histogram [288, 285, 233, 144, 144, 144, 144, 143, 143, 143, 143, 143, 142, 142, 142, 141, 89, 55, 1, 1, 1, 1] [2025-02-06 14:31:43,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-06 14:31:43,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:43,873 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-06 14:31:43,873 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 14:31:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1454639312, now seen corresponding path program 14 times [2025-02-06 14:31:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 14:31:43,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683087115] [2025-02-06 14:31:43,874 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:31:43,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 14:31:43,910 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2812 statements into 2 equivalence classes. [2025-02-06 14:31:44,071 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2812 of 2812 statements. [2025-02-06 14:31:44,071 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:31:44,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 292157 backedges. 8391 proven. 27699 refuted. 0 times theorem prover too weak. 256067 trivial. 0 not checked. [2025-02-06 14:31:51,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 14:31:51,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683087115] [2025-02-06 14:31:51,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683087115] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 14:31:51,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496605001] [2025-02-06 14:31:51,811 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 14:31:51,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 14:31:51,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 14:31:51,813 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 14:31:51,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-06 14:31:52,275 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2812 statements into 2 equivalence classes. [2025-02-06 14:31:52,614 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2812 of 2812 statements. [2025-02-06 14:31:52,614 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 14:31:52,614 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 14:31:52,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 5214 conjuncts, 38 conjuncts are in the unsatisfiable core [2025-02-06 14:31:52,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 14:31:52,855 INFO L134 CoverageAnalysis]: Checked inductivity of 292157 backedges. 114499 proven. 20720 refuted. 0 times theorem prover too weak. 156938 trivial. 0 not checked. [2025-02-06 14:31:52,855 INFO L312 TraceCheckSpWp]: Computing backward predicates...