./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Fibonacci01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci01-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/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 6b0570f2e0d80d68bc280040cce27f654b3fe7a2c0bad30f9bb811af9ca3d994 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 15:43:14,585 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 15:43:14,637 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-17 15:43:14,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 15:43:14,641 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 15:43:14,654 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 15:43:14,654 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 15:43:14,655 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 15:43:14,655 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 15:43:14,655 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 15:43:14,655 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 15:43:14,655 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 15:43:14,655 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 15:43:14,655 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 15:43:14,655 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 15:43:14,655 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 15:43:14,655 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 15:43:14,655 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 15:43:14,655 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 15:43:14,656 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 15:43:14,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 15:43:14,657 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 15:43:14,657 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 15:43:14,657 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 15:43:14,657 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 15:43:14,657 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 15:43:14,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 15:43:14,657 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 15:43:14,657 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 15:43:14,657 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 15:43:14,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 15:43:14,657 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/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 -> 6b0570f2e0d80d68bc280040cce27f654b3fe7a2c0bad30f9bb811af9ca3d994 [2025-03-17 15:43:14,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 15:43:14,882 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 15:43:14,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 15:43:14,884 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 15:43:14,884 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 15:43:14,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci01-1.c [2025-03-17 15:43:16,020 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04d46d85/3ec037e5033746f5a822592373c3003e/FLAG07ec0cbd7 [2025-03-17 15:43:16,247 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 15:43:16,247 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci01-1.c [2025-03-17 15:43:16,254 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04d46d85/3ec037e5033746f5a822592373c3003e/FLAG07ec0cbd7 [2025-03-17 15:43:16,269 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e04d46d85/3ec037e5033746f5a822592373c3003e [2025-03-17 15:43:16,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 15:43:16,273 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 15:43:16,274 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 15:43:16,274 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 15:43:16,277 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 15:43:16,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,279 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec49b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16, skipping insertion in model container [2025-03-17 15:43:16,279 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,289 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 15:43:16,398 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 15:43:16,407 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 15:43:16,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 15:43:16,431 INFO L204 MainTranslator]: Completed translation [2025-03-17 15:43:16,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16 WrapperNode [2025-03-17 15:43:16,432 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 15:43:16,433 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 15:43:16,434 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 15:43:16,434 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 15:43:16,438 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,443 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,455 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29 [2025-03-17 15:43:16,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 15:43:16,456 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 15:43:16,456 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 15:43:16,456 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 15:43:16,463 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,464 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,478 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]. [2025-03-17 15:43:16,479 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,479 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,480 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,481 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,486 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,487 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 15:43:16,488 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 15:43:16,488 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 15:43:16,488 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 15:43:16,489 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (1/1) ... [2025-03-17 15:43:16,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 15:43:16,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:16,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 15:43:16,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 15:43:16,542 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-03-17 15:43:16,542 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-03-17 15:43:16,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 15:43:16,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 15:43:16,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 15:43:16,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 15:43:16,584 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 15:43:16,586 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 15:43:16,678 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-03-17 15:43:16,730 INFO L? ?]: Removed 17 outVars from TransFormulas that were not future-live. [2025-03-17 15:43:16,730 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 15:43:16,739 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 15:43:16,740 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 15:43:16,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 03:43:16 BoogieIcfgContainer [2025-03-17 15:43:16,740 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 15:43:16,742 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 15:43:16,742 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 15:43:16,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 15:43:16,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:43:16" (1/3) ... [2025-03-17 15:43:16,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42959989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:43:16, skipping insertion in model container [2025-03-17 15:43:16,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:16" (2/3) ... [2025-03-17 15:43:16,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42959989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:43:16, skipping insertion in model container [2025-03-17 15:43:16,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 03:43:16" (3/3) ... [2025-03-17 15:43:16,748 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2025-03-17 15:43:16,760 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 15:43:16,762 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci01-1.c that has 2 procedures, 33 locations, 1 initial locations, 0 loop locations, and 8 error locations. [2025-03-17 15:43:16,796 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 15:43:16,806 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;@636f1df7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 15:43:16,807 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-17 15:43:16,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 20 states have (on average 1.6) internal successors, (32), 28 states have internal predecessors, (32), 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) [2025-03-17 15:43:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-17 15:43:16,815 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:16,816 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:43:16,816 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:16,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:16,821 INFO L85 PathProgramCache]: Analyzing trace with hash 374658088, now seen corresponding path program 1 times [2025-03-17 15:43:16,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:16,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513625076] [2025-03-17 15:43:16,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:16,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:16,880 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 15:43:16,890 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 15:43:16,891 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:16,891 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 15:43:16,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:16,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513625076] [2025-03-17 15:43:16,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513625076] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:16,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:43:16,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 15:43:16,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513880472] [2025-03-17 15:43:16,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:16,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 15:43:16,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:16,981 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 15:43:16,981 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 15:43:16,982 INFO L87 Difference]: Start difference. First operand has 33 states, 20 states have (on average 1.6) internal successors, (32), 28 states have internal predecessors, (32), 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) [2025-03-17 15:43:17,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:17,024 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2025-03-17 15:43:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 15:43:17,027 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 [2025-03-17 15:43:17,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:17,031 INFO L225 Difference]: With dead ends: 38 [2025-03-17 15:43:17,031 INFO L226 Difference]: Without dead ends: 29 [2025-03-17 15:43:17,033 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 [2025-03-17 15:43:17,035 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:17,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:17,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2025-03-17 15:43:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2025-03-17 15:43:17,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.411764705882353) internal successors, (24), 22 states have internal predecessors, (24), 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) [2025-03-17 15:43:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2025-03-17 15:43:17,061 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 7 [2025-03-17 15:43:17,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:17,061 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2025-03-17 15:43:17,061 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) [2025-03-17 15:43:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2025-03-17 15:43:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-17 15:43:17,062 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:17,062 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:43:17,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 15:43:17,062 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:17,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:17,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1270501175, now seen corresponding path program 1 times [2025-03-17 15:43:17,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:17,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729297257] [2025-03-17 15:43:17,063 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:17,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:17,067 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 15:43:17,071 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 15:43:17,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:17,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 15:43:17,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:17,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729297257] [2025-03-17 15:43:17,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729297257] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:17,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:43:17,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 15:43:17,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835784963] [2025-03-17 15:43:17,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:17,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:43:17,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:17,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:43:17,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:43:17,142 INFO L87 Difference]: Start difference. First operand 27 states and 30 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) [2025-03-17 15:43:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:17,237 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2025-03-17 15:43:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:43:17,238 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 [2025-03-17 15:43:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:17,238 INFO L225 Difference]: With dead ends: 29 [2025-03-17 15:43:17,238 INFO L226 Difference]: Without dead ends: 25 [2025-03-17 15:43:17,238 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 [2025-03-17 15:43:17,239 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:17,240 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 31 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:17,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-03-17 15:43:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2025-03-17 15:43:17,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-17 15:43:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2025-03-17 15:43:17,245 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2025-03-17 15:43:17,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:17,245 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2025-03-17 15:43:17,245 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) [2025-03-17 15:43:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2025-03-17 15:43:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-17 15:43:17,245 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:17,245 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:43:17,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 15:43:17,246 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:17,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:17,246 INFO L85 PathProgramCache]: Analyzing trace with hash -749186327, now seen corresponding path program 1 times [2025-03-17 15:43:17,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:17,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243735572] [2025-03-17 15:43:17,247 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:17,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:17,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-17 15:43:17,262 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-17 15:43:17,264 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:17,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 15:43:17,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:17,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243735572] [2025-03-17 15:43:17,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243735572] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:17,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:43:17,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 15:43:17,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339353121] [2025-03-17 15:43:17,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:17,309 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 15:43:17,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:17,310 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 15:43:17,310 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 15:43:17,310 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 4 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-17 15:43:17,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:17,317 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2025-03-17 15:43:17,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 15:43:17,317 INFO L78 Accepts]: Start accepts. Automaton has has 4 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2025-03-17 15:43:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:17,318 INFO L225 Difference]: With dead ends: 23 [2025-03-17 15:43:17,318 INFO L226 Difference]: Without dead ends: 20 [2025-03-17 15:43:17,318 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 15:43:17,319 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:17,319 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:17,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2025-03-17 15:43:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2025-03-17 15:43:17,322 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) [2025-03-17 15:43:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2025-03-17 15:43:17,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 9 [2025-03-17 15:43:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:17,324 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2025-03-17 15:43:17,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2025-03-17 15:43:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2025-03-17 15:43:17,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-03-17 15:43:17,324 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:17,324 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:43:17,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 15:43:17,324 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:17,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:17,325 INFO L85 PathProgramCache]: Analyzing trace with hash -741839222, now seen corresponding path program 1 times [2025-03-17 15:43:17,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:17,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586459565] [2025-03-17 15:43:17,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:17,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:17,331 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 15:43:17,343 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 15:43:17,343 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:17,343 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:43:17,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:17,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586459565] [2025-03-17 15:43:17,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586459565] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:17,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:43:17,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 15:43:17,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303206493] [2025-03-17 15:43:17,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:17,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:43:17,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:17,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:43:17,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:43:17,474 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) [2025-03-17 15:43:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:17,525 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2025-03-17 15:43:17,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:43:17,526 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 [2025-03-17 15:43:17,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:17,527 INFO L225 Difference]: With dead ends: 34 [2025-03-17 15:43:17,527 INFO L226 Difference]: Without dead ends: 32 [2025-03-17 15:43:17,527 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 [2025-03-17 15:43:17,527 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:17,528 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 65 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-17 15:43:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2025-03-17 15:43:17,537 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) [2025-03-17 15:43:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2025-03-17 15:43:17,539 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 29 [2025-03-17 15:43:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:17,539 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2025-03-17 15:43:17,539 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) [2025-03-17 15:43:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2025-03-17 15:43:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-03-17 15:43:17,540 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:17,540 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] [2025-03-17 15:43:17,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 15:43:17,540 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:17,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash -640581063, now seen corresponding path program 1 times [2025-03-17 15:43:17,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:17,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651158779] [2025-03-17 15:43:17,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:17,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:17,548 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 15:43:17,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 15:43:17,571 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:17,571 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:17,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 15:43:17,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:17,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651158779] [2025-03-17 15:43:17,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651158779] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:17,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292058038] [2025-03-17 15:43:17,660 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:17,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:17,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:17,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:17,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 15:43:17,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 15:43:17,700 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 15:43:17,700 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:17,700 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:17,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 15:43:17,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 15:43:17,803 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 15:43:17,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292058038] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:17,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:17,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-03-17 15:43:17,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513841395] [2025-03-17 15:43:17,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:17,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 15:43:17,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:17,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 15:43:17,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-03-17 15:43:17,939 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) [2025-03-17 15:43:18,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:18,171 INFO L93 Difference]: Finished difference Result 90 states and 128 transitions. [2025-03-17 15:43:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 15:43:18,172 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 [2025-03-17 15:43:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:18,173 INFO L225 Difference]: With dead ends: 90 [2025-03-17 15:43:18,175 INFO L226 Difference]: Without dead ends: 64 [2025-03-17 15:43:18,176 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 [2025-03-17 15:43:18,176 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:18,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 91 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:18,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-17 15:43:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2025-03-17 15:43:18,190 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) [2025-03-17 15:43:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2025-03-17 15:43:18,193 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 24 [2025-03-17 15:43:18,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:18,194 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2025-03-17 15:43:18,194 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) [2025-03-17 15:43:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2025-03-17 15:43:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-17 15:43:18,195 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:18,195 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:43:18,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:18,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:18,397 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:18,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1663695317, now seen corresponding path program 2 times [2025-03-17 15:43:18,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:18,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549774866] [2025-03-17 15:43:18,401 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:18,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:18,409 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 15:43:18,416 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 15:43:18,417 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:18,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:43:18,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:18,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549774866] [2025-03-17 15:43:18,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549774866] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128522223] [2025-03-17 15:43:18,493 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:18,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:18,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:18,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:18,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 15:43:18,519 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 15:43:18,530 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 15:43:18,530 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:18,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:18,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 15:43:18,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:43:18,570 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 15:43:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128522223] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:18,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 15:43:18,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-03-17 15:43:18,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336176142] [2025-03-17 15:43:18,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:18,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:43:18,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:18,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:43:18,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 15:43:18,571 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) [2025-03-17 15:43:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:18,610 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2025-03-17 15:43:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:43:18,610 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 30 [2025-03-17 15:43:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:18,611 INFO L225 Difference]: With dead ends: 59 [2025-03-17 15:43:18,611 INFO L226 Difference]: Without dead ends: 58 [2025-03-17 15:43:18,611 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 15:43:18,612 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:18,612 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 48 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:18,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-17 15:43:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2025-03-17 15:43:18,623 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) [2025-03-17 15:43:18,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2025-03-17 15:43:18,625 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2025-03-17 15:43:18,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:18,625 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2025-03-17 15:43:18,625 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) [2025-03-17 15:43:18,625 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2025-03-17 15:43:18,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-03-17 15:43:18,625 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:18,625 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] [2025-03-17 15:43:18,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:18,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-17 15:43:18,826 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:18,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:18,827 INFO L85 PathProgramCache]: Analyzing trace with hash 34947248, now seen corresponding path program 1 times [2025-03-17 15:43:18,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:18,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479898242] [2025-03-17 15:43:18,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:18,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:18,830 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 15:43:18,832 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 15:43:18,832 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:18,832 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:43:18,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:18,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479898242] [2025-03-17 15:43:18,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479898242] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:18,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283838517] [2025-03-17 15:43:18,883 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:18,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:18,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:18,886 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:18,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 15:43:18,907 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 15:43:18,916 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 15:43:18,916 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:18,916 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:18,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 15:43:18,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:43:18,966 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 15:43:18,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283838517] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:18,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 15:43:18,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-17 15:43:18,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297675515] [2025-03-17 15:43:18,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:18,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 15:43:18,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:18,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 15:43:18,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 15:43:18,969 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) [2025-03-17 15:43:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:19,003 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2025-03-17 15:43:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 15:43:19,004 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 [2025-03-17 15:43:19,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:19,005 INFO L225 Difference]: With dead ends: 81 [2025-03-17 15:43:19,005 INFO L226 Difference]: Without dead ends: 80 [2025-03-17 15:43:19,005 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 [2025-03-17 15:43:19,005 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 [2025-03-17 15:43:19,006 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] [2025-03-17 15:43:19,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-17 15:43:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2025-03-17 15:43:19,024 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) [2025-03-17 15:43:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2025-03-17 15:43:19,024 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 31 [2025-03-17 15:43:19,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:19,025 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2025-03-17 15:43:19,025 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) [2025-03-17 15:43:19,025 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2025-03-17 15:43:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-03-17 15:43:19,029 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:19,029 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 15:43:19,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 15:43:19,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:19,229 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:19,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1154302086, now seen corresponding path program 1 times [2025-03-17 15:43:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434462216] [2025-03-17 15:43:19,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:19,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-17 15:43:19,243 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-17 15:43:19,243 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:19,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:19,357 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-17 15:43:19,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434462216] [2025-03-17 15:43:19,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434462216] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:19,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870579244] [2025-03-17 15:43:19,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:19,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:19,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:19,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:19,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 15:43:19,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-03-17 15:43:19,401 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-03-17 15:43:19,402 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:19,402 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:19,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 15:43:19,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-03-17 15:43:19,482 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 15:43:19,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870579244] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:19,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:19,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-03-17 15:43:19,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416800146] [2025-03-17 15:43:19,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:19,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 15:43:19,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:19,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 15:43:19,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:43:19,642 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) [2025-03-17 15:43:19,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:19,797 INFO L93 Difference]: Finished difference Result 140 states and 216 transitions. [2025-03-17 15:43:19,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 15:43:19,798 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 51 [2025-03-17 15:43:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:19,800 INFO L225 Difference]: With dead ends: 140 [2025-03-17 15:43:19,802 INFO L226 Difference]: Without dead ends: 138 [2025-03-17 15:43:19,803 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-03-17 15:43:19,803 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:19,804 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 148 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:19,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-03-17 15:43:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2025-03-17 15:43:19,823 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) [2025-03-17 15:43:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 158 transitions. [2025-03-17 15:43:19,825 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 158 transitions. Word has length 51 [2025-03-17 15:43:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:19,825 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 158 transitions. [2025-03-17 15:43:19,825 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) [2025-03-17 15:43:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 158 transitions. [2025-03-17 15:43:19,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-03-17 15:43:19,827 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:19,827 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1] [2025-03-17 15:43:19,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:20,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:20,027 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:20,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:20,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1966055192, now seen corresponding path program 1 times [2025-03-17 15:43:20,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:20,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351114585] [2025-03-17 15:43:20,028 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:20,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:20,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-03-17 15:43:20,051 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-03-17 15:43:20,051 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:20,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 50 proven. 86 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2025-03-17 15:43:20,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:20,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351114585] [2025-03-17 15:43:20,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351114585] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:20,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035850261] [2025-03-17 15:43:20,191 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:20,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:20,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:20,193 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:20,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 15:43:20,217 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 89 statements into 1 equivalence classes. [2025-03-17 15:43:20,237 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 89 of 89 statements. [2025-03-17 15:43:20,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:20,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:20,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 15:43:20,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 67 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-17 15:43:20,341 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 67 proven. 95 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-03-17 15:43:20,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035850261] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:20,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:20,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 16 [2025-03-17 15:43:20,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202586713] [2025-03-17 15:43:20,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:20,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 15:43:20,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:20,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 15:43:20,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:43:20,617 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) [2025-03-17 15:43:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:20,773 INFO L93 Difference]: Finished difference Result 173 states and 298 transitions. [2025-03-17 15:43:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 15:43:20,774 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 89 [2025-03-17 15:43:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:20,775 INFO L225 Difference]: With dead ends: 173 [2025-03-17 15:43:20,775 INFO L226 Difference]: Without dead ends: 79 [2025-03-17 15:43:20,776 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 170 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2025-03-17 15:43:20,777 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 88 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:20,777 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 75 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:20,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-17 15:43:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2025-03-17 15:43:20,783 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) [2025-03-17 15:43:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2025-03-17 15:43:20,784 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 89 [2025-03-17 15:43:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:20,785 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2025-03-17 15:43:20,785 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) [2025-03-17 15:43:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2025-03-17 15:43:20,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2025-03-17 15:43:20,786 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:20,786 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1] [2025-03-17 15:43:20,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:20,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:20,990 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:20,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:20,991 INFO L85 PathProgramCache]: Analyzing trace with hash -686077799, now seen corresponding path program 2 times [2025-03-17 15:43:20,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:20,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621984622] [2025-03-17 15:43:20,991 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:20,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:20,996 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 102 statements into 2 equivalence classes. [2025-03-17 15:43:21,009 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-17 15:43:21,009 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:21,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 47 proven. 96 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-03-17 15:43:21,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:21,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621984622] [2025-03-17 15:43:21,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621984622] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:21,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987875214] [2025-03-17 15:43:21,116 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:21,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:21,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:21,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 15:43:21,143 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 102 statements into 2 equivalence classes. [2025-03-17 15:43:21,160 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 102 of 102 statements. [2025-03-17 15:43:21,160 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:21,161 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:21,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 15:43:21,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:21,204 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 200 proven. 15 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2025-03-17 15:43:21,204 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 48 proven. 121 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-03-17 15:43:21,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987875214] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:21,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:21,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2025-03-17 15:43:21,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778419436] [2025-03-17 15:43:21,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:21,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 15:43:21,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:21,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 15:43:21,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-17 15:43:21,431 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, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-03-17 15:43:21,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:21,510 INFO L93 Difference]: Finished difference Result 128 states and 178 transitions. [2025-03-17 15:43:21,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 15:43:21,510 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, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 102 [2025-03-17 15:43:21,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:21,511 INFO L225 Difference]: With dead ends: 128 [2025-03-17 15:43:21,511 INFO L226 Difference]: Without dead ends: 62 [2025-03-17 15:43:21,512 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 196 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-03-17 15:43:21,513 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:21,514 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 58 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:21,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-03-17 15:43:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2025-03-17 15:43:21,519 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) [2025-03-17 15:43:21,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2025-03-17 15:43:21,520 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 102 [2025-03-17 15:43:21,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:21,521 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2025-03-17 15:43:21,521 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, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-03-17 15:43:21,521 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2025-03-17 15:43:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2025-03-17 15:43:21,523 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:21,523 INFO L218 NwaCegarLoop]: trace histogram [14, 12, 12, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 2, 1, 1, 1, 1] [2025-03-17 15:43:21,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:21,723 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:21,724 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:21,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:21,724 INFO L85 PathProgramCache]: Analyzing trace with hash -588297324, now seen corresponding path program 3 times [2025-03-17 15:43:21,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:21,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681800425] [2025-03-17 15:43:21,725 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:21,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:21,729 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 129 statements into 12 equivalence classes. [2025-03-17 15:43:21,741 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 69 of 129 statements. [2025-03-17 15:43:21,741 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 15:43:21,741 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 206 proven. 18 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2025-03-17 15:43:21,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:21,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681800425] [2025-03-17 15:43:21,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681800425] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:21,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072790294] [2025-03-17 15:43:21,819 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:21,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:21,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:21,821 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:21,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 15:43:21,846 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 129 statements into 12 equivalence classes. [2025-03-17 15:43:21,860 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 69 of 129 statements. [2025-03-17 15:43:21,860 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 15:43:21,860 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:21,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 15:43:21,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 203 proven. 21 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2025-03-17 15:43:21,909 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 203 proven. 22 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2025-03-17 15:43:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072790294] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:22,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:22,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 12 [2025-03-17 15:43:22,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466864668] [2025-03-17 15:43:22,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:22,167 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 15:43:22,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:22,167 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 15:43:22,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-03-17 15:43:22,168 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-17 15:43:22,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:22,260 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2025-03-17 15:43:22,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 15:43:22,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 129 [2025-03-17 15:43:22,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:22,261 INFO L225 Difference]: With dead ends: 113 [2025-03-17 15:43:22,261 INFO L226 Difference]: Without dead ends: 58 [2025-03-17 15:43:22,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 252 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:43:22,261 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 65 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:22,262 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 71 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-17 15:43:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2025-03-17 15:43:22,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-17 15:43:22,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2025-03-17 15:43:22,270 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 129 [2025-03-17 15:43:22,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:22,270 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2025-03-17 15:43:22,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-17 15:43:22,270 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2025-03-17 15:43:22,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2025-03-17 15:43:22,271 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:22,271 INFO L218 NwaCegarLoop]: trace histogram [15, 13, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 3, 1, 1, 1, 1] [2025-03-17 15:43:22,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:22,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:22,473 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:22,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:22,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1536850811, now seen corresponding path program 4 times [2025-03-17 15:43:22,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:22,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587896075] [2025-03-17 15:43:22,473 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:43:22,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:22,484 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 137 statements into 2 equivalence classes. [2025-03-17 15:43:22,503 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 83 of 137 statements. [2025-03-17 15:43:22,503 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:43:22,503 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 89 proven. 276 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2025-03-17 15:43:22,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:22,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587896075] [2025-03-17 15:43:22,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587896075] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:22,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480293301] [2025-03-17 15:43:22,653 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:43:22,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:22,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:22,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:22,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 15:43:22,683 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 137 statements into 2 equivalence classes. [2025-03-17 15:43:22,696 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 83 of 137 statements. [2025-03-17 15:43:22,696 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:43:22,696 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:22,697 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 15:43:22,700 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 305 proven. 189 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2025-03-17 15:43:22,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:23,209 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 105 proven. 313 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2025-03-17 15:43:23,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480293301] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:23,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:23,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14] total 19 [2025-03-17 15:43:23,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992959723] [2025-03-17 15:43:23,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:23,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 15:43:23,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:23,211 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 15:43:23,211 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-03-17 15:43:23,211 INFO L87 Difference]: Start difference. First operand 56 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) [2025-03-17 15:43:23,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:23,387 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2025-03-17 15:43:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 15:43:23,388 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 137 [2025-03-17 15:43:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:23,389 INFO L225 Difference]: With dead ends: 125 [2025-03-17 15:43:23,389 INFO L226 Difference]: Without dead ends: 74 [2025-03-17 15:43:23,390 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 264 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2025-03-17 15:43:23,390 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 146 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:23,390 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 86 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2025-03-17 15:43:23,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2025-03-17 15:43:23,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-17 15:43:23,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2025-03-17 15:43:23,396 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 137 [2025-03-17 15:43:23,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:23,396 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2025-03-17 15:43:23,396 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) [2025-03-17 15:43:23,399 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2025-03-17 15:43:23,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-17 15:43:23,399 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:23,399 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] [2025-03-17 15:43:23,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:23,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-17 15:43:23,601 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:23,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash -530450446, now seen corresponding path program 5 times [2025-03-17 15:43:23,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:23,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656081895] [2025-03-17 15:43:23,601 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:43:23,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:23,605 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 83 statements into 8 equivalence classes. [2025-03-17 15:43:23,611 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 83 of 83 statements. [2025-03-17 15:43:23,611 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-17 15:43:23,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:23,769 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 16 proven. 71 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2025-03-17 15:43:23,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:23,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656081895] [2025-03-17 15:43:23,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656081895] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:23,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937408097] [2025-03-17 15:43:23,769 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:43:23,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:23,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:23,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:23,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 15:43:23,798 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 83 statements into 8 equivalence classes. [2025-03-17 15:43:23,818 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) and asserted 83 of 83 statements. [2025-03-17 15:43:23,818 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2025-03-17 15:43:23,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:23,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-17 15:43:23,821 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2025-03-17 15:43:23,933 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2025-03-17 15:43:24,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937408097] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:24,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:24,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 12] total 22 [2025-03-17 15:43:24,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899476833] [2025-03-17 15:43:24,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:24,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 15:43:24,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:24,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 15:43:24,327 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2025-03-17 15:43:24,327 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 states have internal predecessors, (68), 6 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (17), 15 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-17 15:43:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:24,379 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2025-03-17 15:43:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 15:43:24,379 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 states have internal predecessors, (68), 6 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (17), 15 states have call predecessors, (17), 6 states have call successors, (17) Word has length 83 [2025-03-17 15:43:24,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:24,380 INFO L225 Difference]: With dead ends: 62 [2025-03-17 15:43:24,380 INFO L226 Difference]: Without dead ends: 61 [2025-03-17 15:43:24,380 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 149 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=385, Unknown=0, NotChecked=0, Total=506 [2025-03-17 15:43:24,381 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:24,381 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 154 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2025-03-17 15:43:24,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2025-03-17 15:43:24,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-17 15:43:24,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2025-03-17 15:43:24,384 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 83 [2025-03-17 15:43:24,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:24,385 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2025-03-17 15:43:24,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.090909090909091) internal successors, (68), 23 states have internal predecessors, (68), 6 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (17), 15 states have call predecessors, (17), 6 states have call successors, (17) [2025-03-17 15:43:24,385 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2025-03-17 15:43:24,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2025-03-17 15:43:24,385 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:24,385 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 1, 1, 1, 1] [2025-03-17 15:43:24,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 15:43:24,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 15:43:24,590 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:24,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1234323450, now seen corresponding path program 2 times [2025-03-17 15:43:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:24,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671271912] [2025-03-17 15:43:24,590 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:24,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 143 statements into 2 equivalence classes. [2025-03-17 15:43:24,604 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 143 of 143 statements. [2025-03-17 15:43:24,604 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:24,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 189 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2025-03-17 15:43:24,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:24,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671271912] [2025-03-17 15:43:24,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671271912] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:24,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938309155] [2025-03-17 15:43:24,969 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:24,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:24,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:24,971 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:24,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 15:43:25,007 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 143 statements into 2 equivalence classes. [2025-03-17 15:43:25,029 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 143 of 143 statements. [2025-03-17 15:43:25,029 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:25,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:25,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 15:43:25,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2025-03-17 15:43:25,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:26,113 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2025-03-17 15:43:26,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938309155] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:26,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:26,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 31 [2025-03-17 15:43:26,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184507947] [2025-03-17 15:43:26,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:26,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 15:43:26,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:26,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 15:43:26,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2025-03-17 15:43:26,115 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 32 states have internal predecessors, (84), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2025-03-17 15:43:26,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:26,341 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2025-03-17 15:43:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 15:43:26,342 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 32 states have internal predecessors, (84), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) Word has length 143 [2025-03-17 15:43:26,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:26,343 INFO L225 Difference]: With dead ends: 125 [2025-03-17 15:43:26,343 INFO L226 Difference]: Without dead ends: 124 [2025-03-17 15:43:26,344 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 270 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1255, Unknown=0, NotChecked=0, Total=1640 [2025-03-17 15:43:26,344 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:26,344 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 192 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2025-03-17 15:43:26,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 97. [2025-03-17 15:43:26,358 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) [2025-03-17 15:43:26,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 138 transitions. [2025-03-17 15:43:26,359 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 138 transitions. Word has length 143 [2025-03-17 15:43:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:26,359 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 138 transitions. [2025-03-17 15:43:26,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 32 states have internal predecessors, (84), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2025-03-17 15:43:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 138 transitions. [2025-03-17 15:43:26,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2025-03-17 15:43:26,363 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:26,364 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] [2025-03-17 15:43:26,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:26,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 15:43:26,568 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:26,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:26,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1044562908, now seen corresponding path program 3 times [2025-03-17 15:43:26,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:26,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750199931] [2025-03-17 15:43:26,571 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:26,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:26,584 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 319 statements into 21 equivalence classes. [2025-03-17 15:43:26,606 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 139 of 319 statements. [2025-03-17 15:43:26,606 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-17 15:43:26,606 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 1029 proven. 83 refuted. 0 times theorem prover too weak. 2461 trivial. 0 not checked. [2025-03-17 15:43:26,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:26,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750199931] [2025-03-17 15:43:26,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750199931] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:26,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183163146] [2025-03-17 15:43:26,746 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:26,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:26,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:26,748 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:26,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 15:43:26,798 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 319 statements into 21 equivalence classes. [2025-03-17 15:43:26,823 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) and asserted 139 of 319 statements. [2025-03-17 15:43:26,823 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2025-03-17 15:43:26,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:26,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 15:43:26,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 1107 proven. 97 refuted. 0 times theorem prover too weak. 2369 trivial. 0 not checked. [2025-03-17 15:43:26,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 1107 proven. 106 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2025-03-17 15:43:27,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183163146] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:27,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:27,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13] total 18 [2025-03-17 15:43:27,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079390278] [2025-03-17 15:43:27,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:27,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 15:43:27,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:27,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 15:43:27,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-03-17 15:43:27,632 INFO L87 Difference]: Start difference. First operand 97 states and 138 transitions. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 10 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-17 15:43:27,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:27,766 INFO L93 Difference]: Finished difference Result 185 states and 276 transitions. [2025-03-17 15:43:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-17 15:43:27,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 10 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 319 [2025-03-17 15:43:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:27,767 INFO L225 Difference]: With dead ends: 185 [2025-03-17 15:43:27,767 INFO L226 Difference]: Without dead ends: 93 [2025-03-17 15:43:27,768 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 658 GetRequests, 628 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2025-03-17 15:43:27,769 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 66 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:27,769 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 81 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:27,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2025-03-17 15:43:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2025-03-17 15:43:27,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 70 states have internal predecessors, (76), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (31), 14 states have call predecessors, (31), 9 states have call successors, (31) [2025-03-17 15:43:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2025-03-17 15:43:27,774 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 319 [2025-03-17 15:43:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:27,774 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2025-03-17 15:43:27,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 10 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2025-03-17 15:43:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2025-03-17 15:43:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2025-03-17 15:43:27,777 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:27,777 INFO L218 NwaCegarLoop]: trace histogram [39, 38, 31, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 18, 12, 8, 1, 1, 1, 1] [2025-03-17 15:43:27,784 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 15:43:27,978 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 15:43:27,978 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:27,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:27,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1407916483, now seen corresponding path program 4 times [2025-03-17 15:43:27,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:27,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925712629] [2025-03-17 15:43:27,979 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:43:27,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:27,987 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 378 statements into 2 equivalence classes. [2025-03-17 15:43:28,005 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 224 of 378 statements. [2025-03-17 15:43:28,005 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:43:28,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:28,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 428 proven. 1234 refuted. 0 times theorem prover too weak. 3401 trivial. 0 not checked. [2025-03-17 15:43:28,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:28,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925712629] [2025-03-17 15:43:28,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925712629] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:28,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581667135] [2025-03-17 15:43:28,190 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:43:28,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:28,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:28,192 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:28,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 15:43:28,247 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 378 statements into 2 equivalence classes. [2025-03-17 15:43:28,280 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 224 of 378 statements. [2025-03-17 15:43:28,281 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:43:28,281 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:28,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 15:43:28,285 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 389 proven. 1723 refuted. 0 times theorem prover too weak. 2951 trivial. 0 not checked. [2025-03-17 15:43:28,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:29,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5063 backedges. 389 proven. 1762 refuted. 0 times theorem prover too weak. 2912 trivial. 0 not checked. [2025-03-17 15:43:29,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581667135] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:29,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:29,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 24 [2025-03-17 15:43:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180328095] [2025-03-17 15:43:29,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:29,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 15:43:29,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:29,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 15:43:29,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-03-17 15:43:29,317 INFO L87 Difference]: Start difference. First operand 91 states and 117 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) [2025-03-17 15:43:29,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:29,575 INFO L93 Difference]: Finished difference Result 201 states and 283 transitions. [2025-03-17 15:43:29,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-17 15:43:29,576 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 378 [2025-03-17 15:43:29,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:29,577 INFO L225 Difference]: With dead ends: 201 [2025-03-17 15:43:29,577 INFO L226 Difference]: Without dead ends: 115 [2025-03-17 15:43:29,578 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 789 GetRequests, 742 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2025-03-17 15:43:29,578 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:29,578 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 117 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2025-03-17 15:43:29,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2025-03-17 15:43:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 80 states have (on average 1.05) internal successors, (84), 77 states have internal predecessors, (84), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (28), 14 states have call predecessors, (28), 10 states have call successors, (28) [2025-03-17 15:43:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2025-03-17 15:43:29,584 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 378 [2025-03-17 15:43:29,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:29,584 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2025-03-17 15:43:29,584 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) [2025-03-17 15:43:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2025-03-17 15:43:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2025-03-17 15:43:29,585 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:29,585 INFO L218 NwaCegarLoop]: trace histogram [32, 30, 26, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 6, 1, 1, 1, 1] [2025-03-17 15:43:29,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:29,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 15:43:29,790 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:29,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:29,790 INFO L85 PathProgramCache]: Analyzing trace with hash -933538885, now seen corresponding path program 5 times [2025-03-17 15:43:29,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:29,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272250195] [2025-03-17 15:43:29,790 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:43:29,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:29,799 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 306 statements into 24 equivalence classes. [2025-03-17 15:43:29,812 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 178 of 306 statements. [2025-03-17 15:43:29,812 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-17 15:43:29,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 574 proven. 1148 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2025-03-17 15:43:30,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:30,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272250195] [2025-03-17 15:43:30,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272250195] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:30,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910066548] [2025-03-17 15:43:30,054 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:43:30,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:30,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:30,056 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:30,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 15:43:30,111 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 306 statements into 24 equivalence classes. [2025-03-17 15:43:30,141 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 178 of 306 statements. [2025-03-17 15:43:30,142 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-17 15:43:30,142 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:30,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 15:43:30,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 575 proven. 1157 refuted. 0 times theorem prover too weak. 1550 trivial. 0 not checked. [2025-03-17 15:43:30,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:31,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 572 proven. 1216 refuted. 0 times theorem prover too weak. 1494 trivial. 0 not checked. [2025-03-17 15:43:31,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910066548] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:31,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:31,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 22] total 29 [2025-03-17 15:43:31,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198602282] [2025-03-17 15:43:31,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:31,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 15:43:31,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:31,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 15:43:31,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2025-03-17 15:43:31,396 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 20 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (31), 13 states have call predecessors, (31), 20 states have call successors, (31) [2025-03-17 15:43:31,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:31,738 INFO L93 Difference]: Finished difference Result 241 states and 330 transitions. [2025-03-17 15:43:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 15:43:31,739 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 20 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (31), 13 states have call predecessors, (31), 20 states have call successors, (31) Word has length 306 [2025-03-17 15:43:31,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:31,740 INFO L225 Difference]: With dead ends: 241 [2025-03-17 15:43:31,740 INFO L226 Difference]: Without dead ends: 146 [2025-03-17 15:43:31,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 599 SyntacticMatches, 10 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=1820, Unknown=0, NotChecked=0, Total=2450 [2025-03-17 15:43:31,742 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 224 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:31,742 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 145 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:43:31,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2025-03-17 15:43:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 130. [2025-03-17 15:43:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 101 states have internal predecessors, (110), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (37), 17 states have call predecessors, (37), 14 states have call successors, (37) [2025-03-17 15:43:31,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2025-03-17 15:43:31,753 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 306 [2025-03-17 15:43:31,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:31,754 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2025-03-17 15:43:31,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.103448275862069) internal successors, (148), 29 states have internal predecessors, (148), 20 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (31), 13 states have call predecessors, (31), 20 states have call successors, (31) [2025-03-17 15:43:31,754 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2025-03-17 15:43:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2025-03-17 15:43:31,756 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:31,756 INFO L218 NwaCegarLoop]: trace histogram [32, 30, 26, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 6, 1, 1, 1, 1] [2025-03-17 15:43:31,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:31,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 15:43:31,956 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:31,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:31,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1565061825, now seen corresponding path program 6 times [2025-03-17 15:43:31,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:31,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496463900] [2025-03-17 15:43:31,957 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:43:31,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:31,964 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 306 statements into 21 equivalence classes. [2025-03-17 15:43:31,986 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 270 of 306 statements. [2025-03-17 15:43:31,987 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-17 15:43:31,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 716 proven. 787 refuted. 0 times theorem prover too weak. 1779 trivial. 0 not checked. [2025-03-17 15:43:32,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:32,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496463900] [2025-03-17 15:43:32,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496463900] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:32,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820112669] [2025-03-17 15:43:32,215 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:43:32,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:32,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:32,217 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:32,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 15:43:32,284 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 306 statements into 21 equivalence classes. [2025-03-17 15:43:32,346 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 270 of 306 statements. [2025-03-17 15:43:32,346 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-17 15:43:32,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:32,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 15:43:32,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 724 proven. 797 refuted. 0 times theorem prover too weak. 1761 trivial. 0 not checked. [2025-03-17 15:43:32,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 740 proven. 824 refuted. 0 times theorem prover too weak. 1718 trivial. 0 not checked. [2025-03-17 15:43:33,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820112669] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:33,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:33,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 23 [2025-03-17 15:43:33,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661197564] [2025-03-17 15:43:33,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:33,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-03-17 15:43:33,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:33,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-03-17 15:43:33,259 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2025-03-17 15:43:33,259 INFO L87 Difference]: Start difference. First operand 130 states and 162 transitions. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 14 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (25), 13 states have call predecessors, (25), 14 states have call successors, (25) [2025-03-17 15:43:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:33,533 INFO L93 Difference]: Finished difference Result 256 states and 343 transitions. [2025-03-17 15:43:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 15:43:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 14 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (25), 13 states have call predecessors, (25), 14 states have call successors, (25) Word has length 306 [2025-03-17 15:43:33,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:33,535 INFO L225 Difference]: With dead ends: 256 [2025-03-17 15:43:33,535 INFO L226 Difference]: Without dead ends: 131 [2025-03-17 15:43:33,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 600 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2025-03-17 15:43:33,536 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 138 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:33,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 190 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:43:33,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2025-03-17 15:43:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 118. [2025-03-17 15:43:33,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 93 states have internal predecessors, (99), 15 states have call successors, (15), 12 states have call predecessors, (15), 7 states have return successors, (29), 12 states have call predecessors, (29), 14 states have call successors, (29) [2025-03-17 15:43:33,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2025-03-17 15:43:33,543 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 306 [2025-03-17 15:43:33,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:33,544 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2025-03-17 15:43:33,544 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 23 states have internal predecessors, (123), 14 states have call successors, (20), 1 states have call predecessors, (20), 10 states have return successors, (25), 13 states have call predecessors, (25), 14 states have call successors, (25) [2025-03-17 15:43:33,544 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2025-03-17 15:43:33,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2025-03-17 15:43:33,546 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:33,546 INFO L218 NwaCegarLoop]: trace histogram [42, 40, 34, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 19, 13, 8, 1, 1, 1, 1] [2025-03-17 15:43:33,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 15:43:33,750 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:33,750 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:33,750 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:33,750 INFO L85 PathProgramCache]: Analyzing trace with hash 733717759, now seen corresponding path program 7 times [2025-03-17 15:43:33,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:33,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018777532] [2025-03-17 15:43:33,750 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:43:33,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:33,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 404 statements into 1 equivalence classes. [2025-03-17 15:43:33,777 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 404 of 404 statements. [2025-03-17 15:43:33,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:33,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 830 proven. 1470 refuted. 0 times theorem prover too weak. 3503 trivial. 0 not checked. [2025-03-17 15:43:35,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:35,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018777532] [2025-03-17 15:43:35,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018777532] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:35,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422405462] [2025-03-17 15:43:35,216 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:43:35,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:35,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:35,218 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:35,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 15:43:35,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 404 statements into 1 equivalence classes. [2025-03-17 15:43:35,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 404 of 404 statements. [2025-03-17 15:43:35,348 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:35,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:35,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-03-17 15:43:35,354 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3871 trivial. 0 not checked. [2025-03-17 15:43:35,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 1149 proven. 1015 refuted. 0 times theorem prover too weak. 3639 trivial. 0 not checked. [2025-03-17 15:43:40,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422405462] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:40,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:40,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 45 [2025-03-17 15:43:40,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142018742] [2025-03-17 15:43:40,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:40,622 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-17 15:43:40,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:40,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-17 15:43:40,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2025-03-17 15:43:40,624 INFO L87 Difference]: Start difference. First operand 118 states and 143 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) [2025-03-17 15:43:40,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:40,814 INFO L93 Difference]: Finished difference Result 164 states and 224 transitions. [2025-03-17 15:43:40,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 15:43:40,815 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 404 [2025-03-17 15:43:40,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:40,816 INFO L225 Difference]: With dead ends: 164 [2025-03-17 15:43:40,816 INFO L226 Difference]: Without dead ends: 163 [2025-03-17 15:43:40,817 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 893 GetRequests, 792 SyntacticMatches, 51 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2499 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=591, Invalid=2061, Unknown=0, NotChecked=0, Total=2652 [2025-03-17 15:43:40,817 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:40,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 217 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:40,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2025-03-17 15:43:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 145. [2025-03-17 15:43:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 114 states have internal predecessors, (120), 18 states have call successors, (18), 12 states have call predecessors, (18), 10 states have return successors, (59), 18 states have call predecessors, (59), 17 states have call successors, (59) [2025-03-17 15:43:40,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 197 transitions. [2025-03-17 15:43:40,828 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 197 transitions. Word has length 404 [2025-03-17 15:43:40,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:40,828 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 197 transitions. [2025-03-17 15:43:40,828 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) [2025-03-17 15:43:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 197 transitions. [2025-03-17 15:43:40,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2025-03-17 15:43:40,833 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:40,833 INFO L218 NwaCegarLoop]: trace histogram [94, 92, 76, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 46, 45, 29, 18, 1, 1, 1, 1] [2025-03-17 15:43:40,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:41,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:41,034 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:41,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:41,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1934400777, now seen corresponding path program 8 times [2025-03-17 15:43:41,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:41,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394872078] [2025-03-17 15:43:41,035 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:41,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:41,050 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 914 statements into 2 equivalence classes. [2025-03-17 15:43:41,092 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 914 of 914 statements. [2025-03-17 15:43:41,093 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:41,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30452 backedges. 1477 proven. 5737 refuted. 0 times theorem prover too weak. 23238 trivial. 0 not checked. [2025-03-17 15:43:41,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:41,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394872078] [2025-03-17 15:43:41,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394872078] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:41,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860427938] [2025-03-17 15:43:41,829 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:41,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:41,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:41,831 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:41,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 15:43:41,979 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 914 statements into 2 equivalence classes. [2025-03-17 15:43:42,110 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 914 of 914 statements. [2025-03-17 15:43:42,110 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:42,110 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:42,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 1710 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 15:43:42,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:42,270 INFO L134 CoverageAnalysis]: Checked inductivity of 30452 backedges. 1745 proven. 6747 refuted. 0 times theorem prover too weak. 21960 trivial. 0 not checked. [2025-03-17 15:43:42,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30452 backedges. 1745 proven. 6862 refuted. 0 times theorem prover too weak. 21845 trivial. 0 not checked. [2025-03-17 15:43:44,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860427938] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:44,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:44,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 27] total 32 [2025-03-17 15:43:44,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235326385] [2025-03-17 15:43:44,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:44,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 15:43:44,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:44,444 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 15:43:44,444 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2025-03-17 15:43:44,444 INFO L87 Difference]: Start difference. First operand 145 states and 197 transitions. Second operand has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 26 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (40), 16 states have call predecessors, (40), 26 states have call successors, (40) [2025-03-17 15:43:44,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:44,854 INFO L93 Difference]: Finished difference Result 321 states and 483 transitions. [2025-03-17 15:43:44,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-03-17 15:43:44,854 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 26 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (40), 16 states have call predecessors, (40), 26 states have call successors, (40) Word has length 914 [2025-03-17 15:43:44,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:44,856 INFO L225 Difference]: With dead ends: 321 [2025-03-17 15:43:44,856 INFO L226 Difference]: Without dead ends: 181 [2025-03-17 15:43:44,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1879 GetRequests, 1810 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=824, Invalid=2482, Unknown=0, NotChecked=0, Total=3306 [2025-03-17 15:43:44,860 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 354 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:44,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 171 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:43:44,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2025-03-17 15:43:44,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 157. [2025-03-17 15:43:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 124 states have internal predecessors, (130), 20 states have call successors, (20), 14 states have call predecessors, (20), 10 states have return successors, (57), 18 states have call predecessors, (57), 19 states have call successors, (57) [2025-03-17 15:43:44,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 207 transitions. [2025-03-17 15:43:44,871 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 207 transitions. Word has length 914 [2025-03-17 15:43:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:44,871 INFO L471 AbstractCegarLoop]: Abstraction has 157 states and 207 transitions. [2025-03-17 15:43:44,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 26 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (40), 16 states have call predecessors, (40), 26 states have call successors, (40) [2025-03-17 15:43:44,872 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 207 transitions. [2025-03-17 15:43:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1224 [2025-03-17 15:43:44,878 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:44,879 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] [2025-03-17 15:43:44,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:45,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:45,079 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:43:45,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:45,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1064065911, now seen corresponding path program 9 times [2025-03-17 15:43:45,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:45,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825613308] [2025-03-17 15:43:45,080 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:45,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:45,099 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1223 statements into 91 equivalence classes. [2025-03-17 15:43:45,209 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) and asserted 833 of 1223 statements. [2025-03-17 15:43:45,209 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2025-03-17 15:43:45,209 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 16420 proven. 6008 refuted. 0 times theorem prover too weak. 32392 trivial. 0 not checked. [2025-03-17 15:43:52,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:52,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825613308] [2025-03-17 15:43:52,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825613308] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:52,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982559499] [2025-03-17 15:43:52,030 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:52,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:52,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:52,032 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:52,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 15:43:52,208 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1223 statements into 91 equivalence classes. [2025-03-17 15:43:52,395 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) and asserted 833 of 1223 statements. [2025-03-17 15:43:52,395 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2025-03-17 15:43:52,395 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:52,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 165 conjuncts are in the unsatisfiable core [2025-03-17 15:43:52,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:52,961 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 16360 proven. 4596 refuted. 0 times theorem prover too weak. 33864 trivial. 0 not checked. [2025-03-17 15:43:52,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:10,431 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 17227 proven. 4261 refuted. 0 times theorem prover too weak. 33332 trivial. 0 not checked. [2025-03-17 15:44:10,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982559499] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:10,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:10,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 38] total 52 [2025-03-17 15:44:10,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595095970] [2025-03-17 15:44:10,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:10,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2025-03-17 15:44:10,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:10,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2025-03-17 15:44:10,434 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=2149, Unknown=0, NotChecked=0, Total=2756 [2025-03-17 15:44:10,434 INFO L87 Difference]: Start difference. First operand 157 states and 207 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) [2025-03-17 15:44:10,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:10,683 INFO L93 Difference]: Finished difference Result 215 states and 318 transitions. [2025-03-17 15:44:10,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-17 15:44:10,684 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 [2025-03-17 15:44:10,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:10,687 INFO L225 Difference]: With dead ends: 215 [2025-03-17 15:44:10,687 INFO L226 Difference]: Without dead ends: 214 [2025-03-17 15:44:10,688 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2617 GetRequests, 2439 SyntacticMatches, 119 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5266 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=784, Invalid=2876, Unknown=0, NotChecked=0, Total=3660 [2025-03-17 15:44:10,688 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:10,688 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 232 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:10,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2025-03-17 15:44:10,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 175. [2025-03-17 15:44:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 138 states have internal predecessors, (144), 22 states have call successors, (22), 14 states have call predecessors, (22), 12 states have return successors, (85), 22 states have call predecessors, (85), 21 states have call successors, (85) [2025-03-17 15:44:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 251 transitions. [2025-03-17 15:44:10,700 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 251 transitions. Word has length 1223 [2025-03-17 15:44:10,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:10,701 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 251 transitions. [2025-03-17 15:44:10,701 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) [2025-03-17 15:44:10,701 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 251 transitions. [2025-03-17 15:44:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1380 [2025-03-17 15:44:10,709 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:10,710 INFO L218 NwaCegarLoop]: trace histogram [141, 140, 114, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 70, 69, 44, 27, 1, 1, 1, 1] [2025-03-17 15:44:10,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-17 15:44:10,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:10,911 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:44:10,911 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:10,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1073510258, now seen corresponding path program 10 times [2025-03-17 15:44:10,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:10,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321741096] [2025-03-17 15:44:10,912 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:44:10,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:10,955 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1379 statements into 2 equivalence classes. [2025-03-17 15:44:10,993 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 817 of 1379 statements. [2025-03-17 15:44:10,994 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:44:10,994 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 69791 backedges. 2778 proven. 10659 refuted. 0 times theorem prover too weak. 56354 trivial. 0 not checked. [2025-03-17 15:44:11,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:11,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321741096] [2025-03-17 15:44:11,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321741096] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:11,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464678861] [2025-03-17 15:44:11,732 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:44:11,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:11,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:11,733 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:11,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 15:44:12,060 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1379 statements into 2 equivalence classes. [2025-03-17 15:44:12,187 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 817 of 1379 statements. [2025-03-17 15:44:12,187 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:44:12,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:12,191 INFO L256 TraceCheckSpWp]: Trace formula consists of 1709 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-17 15:44:12,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 69791 backedges. 3295 proven. 12189 refuted. 0 times theorem prover too weak. 54307 trivial. 0 not checked. [2025-03-17 15:44:12,366 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 69791 backedges. 3295 proven. 12357 refuted. 0 times theorem prover too weak. 54139 trivial. 0 not checked. [2025-03-17 15:44:15,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464678861] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:15,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:15,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 31] total 36 [2025-03-17 15:44:15,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548655247] [2025-03-17 15:44:15,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:15,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-17 15:44:15,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:15,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-17 15:44:15,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2025-03-17 15:44:15,508 INFO L87 Difference]: Start difference. First operand 175 states and 251 transitions. Second operand has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 30 states have call successors, (35), 1 states have call predecessors, (35), 15 states have return successors, (46), 18 states have call predecessors, (46), 30 states have call successors, (46) [2025-03-17 15:44:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:16,025 INFO L93 Difference]: Finished difference Result 421 states and 698 transitions. [2025-03-17 15:44:16,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-17 15:44:16,028 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 30 states have call successors, (35), 1 states have call predecessors, (35), 15 states have return successors, (46), 18 states have call predecessors, (46), 30 states have call successors, (46) Word has length 1379 [2025-03-17 15:44:16,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:16,031 INFO L225 Difference]: With dead ends: 421 [2025-03-17 15:44:16,031 INFO L226 Difference]: Without dead ends: 251 [2025-03-17 15:44:16,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2819 GetRequests, 2739 SyntacticMatches, 15 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1076, Invalid=3346, Unknown=0, NotChecked=0, Total=4422 [2025-03-17 15:44:16,035 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 471 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:16,037 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 257 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 15:44:16,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2025-03-17 15:44:16,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 220. [2025-03-17 15:44:16,052 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) [2025-03-17 15:44:16,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 317 transitions. [2025-03-17 15:44:16,053 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 317 transitions. Word has length 1379 [2025-03-17 15:44:16,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:16,054 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 317 transitions. [2025-03-17 15:44:16,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 30 states have call successors, (35), 1 states have call predecessors, (35), 15 states have return successors, (46), 18 states have call predecessors, (46), 30 states have call successors, (46) [2025-03-17 15:44:16,055 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 317 transitions. [2025-03-17 15:44:16,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2048 [2025-03-17 15:44:16,101 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:16,102 INFO L218 NwaCegarLoop]: trace histogram [210, 207, 170, 105, 105, 105, 105, 104, 104, 104, 104, 104, 103, 103, 103, 102, 65, 40, 1, 1, 1, 1] [2025-03-17 15:44:16,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-17 15:44:16,302 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:16,302 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:44:16,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:16,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1279178841, now seen corresponding path program 11 times [2025-03-17 15:44:16,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:16,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431164296] [2025-03-17 15:44:16,304 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:44:16,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:16,333 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2047 statements into 157 equivalence classes. [2025-03-17 15:44:16,399 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) and asserted 1037 of 2047 statements. [2025-03-17 15:44:16,400 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) [2025-03-17 15:44:16,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 154460 backedges. 11187 proven. 11432 refuted. 0 times theorem prover too weak. 131841 trivial. 0 not checked. [2025-03-17 15:44:17,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:17,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431164296] [2025-03-17 15:44:17,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431164296] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:17,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281886165] [2025-03-17 15:44:17,284 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:44:17,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:17,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:17,286 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:17,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 15:44:17,665 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 2047 statements into 157 equivalence classes. [2025-03-17 15:44:17,873 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) and asserted 1037 of 2047 statements. [2025-03-17 15:44:17,873 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) [2025-03-17 15:44:17,873 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:17,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 1916 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 15:44:17,891 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 154460 backedges. 82841 proven. 2667 refuted. 0 times theorem prover too weak. 68952 trivial. 0 not checked. [2025-03-17 15:44:18,038 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:22,558 INFO L134 CoverageAnalysis]: Checked inductivity of 154460 backedges. 11187 proven. 11551 refuted. 0 times theorem prover too weak. 131722 trivial. 0 not checked. [2025-03-17 15:44:22,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281886165] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:22,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:22,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 27] total 29 [2025-03-17 15:44:22,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299297834] [2025-03-17 15:44:22,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:22,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 15:44:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:22,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 15:44:22,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2025-03-17 15:44:22,564 INFO L87 Difference]: Start difference. First operand 220 states and 317 transitions. Second operand has 29 states, 29 states have (on average 6.0) internal successors, (174), 29 states have internal predecessors, (174), 25 states have call successors, (29), 2 states have call predecessors, (29), 14 states have return successors, (38), 13 states have call predecessors, (38), 25 states have call successors, (38) [2025-03-17 15:44:22,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:22,918 INFO L93 Difference]: Finished difference Result 417 states and 638 transitions. [2025-03-17 15:44:22,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 15:44:22,919 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.0) internal successors, (174), 29 states have internal predecessors, (174), 25 states have call successors, (29), 2 states have call predecessors, (29), 14 states have return successors, (38), 13 states have call predecessors, (38), 25 states have call successors, (38) Word has length 2047 [2025-03-17 15:44:22,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:22,921 INFO L225 Difference]: With dead ends: 417 [2025-03-17 15:44:22,921 INFO L226 Difference]: Without dead ends: 202 [2025-03-17 15:44:22,923 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4138 GetRequests, 4080 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=560, Invalid=1602, Unknown=0, NotChecked=0, Total=2162 [2025-03-17 15:44:22,924 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 200 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:22,924 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 234 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:44:22,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2025-03-17 15:44:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 166. [2025-03-17 15:44:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 131 states have internal predecessors, (136), 21 states have call successors, (21), 14 states have call predecessors, (21), 11 states have return successors, (67), 20 states have call predecessors, (67), 20 states have call successors, (67) [2025-03-17 15:44:22,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 224 transitions. [2025-03-17 15:44:22,933 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 224 transitions. Word has length 2047 [2025-03-17 15:44:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:22,934 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 224 transitions. [2025-03-17 15:44:22,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.0) internal successors, (174), 29 states have internal predecessors, (174), 25 states have call successors, (29), 2 states have call predecessors, (29), 14 states have return successors, (38), 13 states have call predecessors, (38), 25 states have call successors, (38) [2025-03-17 15:44:22,934 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 224 transitions. [2025-03-17 15:44:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2001 [2025-03-17 15:44:22,949 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:22,949 INFO L218 NwaCegarLoop]: trace histogram [206, 201, 167, 104, 104, 104, 104, 101, 101, 101, 101, 101, 100, 100, 100, 99, 63, 39, 1, 1, 1, 1] [2025-03-17 15:44:22,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-17 15:44:23,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:23,150 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:44:23,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash -346339572, now seen corresponding path program 12 times [2025-03-17 15:44:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:23,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276576576] [2025-03-17 15:44:23,151 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:44:23,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:23,179 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 2000 statements into 141 equivalence classes. [2025-03-17 15:44:23,271 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) and asserted 1234 of 2000 statements. [2025-03-17 15:44:23,271 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) [2025-03-17 15:44:23,271 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 147409 backedges. 7034 proven. 18158 refuted. 0 times theorem prover too weak. 122217 trivial. 0 not checked. [2025-03-17 15:44:24,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:24,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276576576] [2025-03-17 15:44:24,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276576576] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:24,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848373525] [2025-03-17 15:44:24,903 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:44:24,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:24,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:24,905 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:24,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-17 15:44:25,337 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 2000 statements into 141 equivalence classes. [2025-03-17 15:44:25,655 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) and asserted 1234 of 2000 statements. [2025-03-17 15:44:25,655 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) [2025-03-17 15:44:25,655 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:25,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 2294 conjuncts, 32 conjuncts are in the unsatisfiable core [2025-03-17 15:44:25,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:25,866 INFO L134 CoverageAnalysis]: Checked inductivity of 147409 backedges. 71211 proven. 8787 refuted. 0 times theorem prover too weak. 67411 trivial. 0 not checked. [2025-03-17 15:44:25,866 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 147409 backedges. 6235 proven. 16707 refuted. 0 times theorem prover too weak. 124467 trivial. 0 not checked. [2025-03-17 15:44:29,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848373525] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:29,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:29,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 31] total 39 [2025-03-17 15:44:29,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38767251] [2025-03-17 15:44:29,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:29,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-17 15:44:29,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:29,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-17 15:44:29,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1246, Unknown=0, NotChecked=0, Total=1482 [2025-03-17 15:44:29,140 INFO L87 Difference]: Start difference. First operand 166 states and 224 transitions. Second operand has 39 states, 39 states have (on average 5.846153846153846) internal successors, (228), 38 states have internal predecessors, (228), 32 states have call successors, (40), 5 states have call predecessors, (40), 17 states have return successors, (49), 19 states have call predecessors, (49), 29 states have call successors, (49) [2025-03-17 15:44:29,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:29,850 INFO L93 Difference]: Finished difference Result 406 states and 597 transitions. [2025-03-17 15:44:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2025-03-17 15:44:29,853 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.846153846153846) internal successors, (228), 38 states have internal predecessors, (228), 32 states have call successors, (40), 5 states have call predecessors, (40), 17 states have return successors, (49), 19 states have call predecessors, (49), 29 states have call successors, (49) Word has length 2000 [2025-03-17 15:44:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:29,856 INFO L225 Difference]: With dead ends: 406 [2025-03-17 15:44:29,856 INFO L226 Difference]: Without dead ends: 245 [2025-03-17 15:44:29,859 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4082 GetRequests, 3984 SyntacticMatches, 19 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1882 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1473, Invalid=5007, Unknown=0, NotChecked=0, Total=6480 [2025-03-17 15:44:29,860 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 546 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:29,860 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 265 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 15:44:29,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2025-03-17 15:44:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 211. [2025-03-17 15:44:29,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 171 states have (on average 1.0292397660818713) internal successors, (176), 167 states have internal predecessors, (176), 27 states have call successors, (27), 20 states have call predecessors, (27), 12 states have return successors, (79), 23 states have call predecessors, (79), 26 states have call successors, (79) [2025-03-17 15:44:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 282 transitions. [2025-03-17 15:44:29,881 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 282 transitions. Word has length 2000 [2025-03-17 15:44:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:29,882 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 282 transitions. [2025-03-17 15:44:29,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.846153846153846) internal successors, (228), 38 states have internal predecessors, (228), 32 states have call successors, (40), 5 states have call predecessors, (40), 17 states have return successors, (49), 19 states have call predecessors, (49), 29 states have call successors, (49) [2025-03-17 15:44:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 282 transitions. [2025-03-17 15:44:29,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1576 [2025-03-17 15:44:29,905 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:29,905 INFO L218 NwaCegarLoop]: trace histogram [161, 160, 130, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 80, 79, 50, 31, 1, 1, 1, 1] [2025-03-17 15:44:29,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-17 15:44:30,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-03-17 15:44:30,106 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:44:30,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1756555240, now seen corresponding path program 13 times [2025-03-17 15:44:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:30,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99770399] [2025-03-17 15:44:30,107 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:44:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:30,183 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1575 statements into 1 equivalence classes. [2025-03-17 15:44:30,342 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1575 of 1575 statements. [2025-03-17 15:44:30,342 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:30,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 91185 backedges. 6288 proven. 12368 refuted. 0 times theorem prover too weak. 72529 trivial. 0 not checked. [2025-03-17 15:44:32,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99770399] [2025-03-17 15:44:32,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99770399] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:32,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325597593] [2025-03-17 15:44:32,582 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:44:32,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:32,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:32,584 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:32,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-17 15:44:32,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1575 statements into 1 equivalence classes. [2025-03-17 15:44:33,172 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1575 of 1575 statements. [2025-03-17 15:44:33,172 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:33,172 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:33,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 2932 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-17 15:44:33,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:33,347 INFO L134 CoverageAnalysis]: Checked inductivity of 91185 backedges. 48495 proven. 5527 refuted. 0 times theorem prover too weak. 37163 trivial. 0 not checked. [2025-03-17 15:44:33,348 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 91185 backedges. 5144 proven. 13759 refuted. 0 times theorem prover too weak. 72282 trivial. 0 not checked. [2025-03-17 15:44:38,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325597593] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:38,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:38,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 31] total 33 [2025-03-17 15:44:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111080813] [2025-03-17 15:44:38,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:38,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-17 15:44:38,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:38,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-17 15:44:38,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2025-03-17 15:44:38,320 INFO L87 Difference]: Start difference. First operand 211 states and 282 transitions. Second operand has 33 states, 33 states have (on average 6.2727272727272725) internal successors, (207), 33 states have internal predecessors, (207), 30 states have call successors, (35), 2 states have call predecessors, (35), 16 states have return successors, (46), 16 states have call predecessors, (46), 30 states have call successors, (46) [2025-03-17 15:44:38,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:38,777 INFO L93 Difference]: Finished difference Result 423 states and 583 transitions. [2025-03-17 15:44:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-17 15:44:38,777 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.2727272727272725) internal successors, (207), 33 states have internal predecessors, (207), 30 states have call successors, (35), 2 states have call predecessors, (35), 16 states have return successors, (46), 16 states have call predecessors, (46), 30 states have call successors, (46) Word has length 1575 [2025-03-17 15:44:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:38,780 INFO L225 Difference]: With dead ends: 423 [2025-03-17 15:44:38,780 INFO L226 Difference]: Without dead ends: 217 [2025-03-17 15:44:38,782 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3201 GetRequests, 3134 SyntacticMatches, 15 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=724, Invalid=2138, Unknown=0, NotChecked=0, Total=2862 [2025-03-17 15:44:38,782 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 401 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:38,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 283 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 15:44:38,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2025-03-17 15:44:38,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 169. [2025-03-17 15:44:38,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 134 states have internal predecessors, (139), 22 states have call successors, (22), 16 states have call predecessors, (22), 10 states have return successors, (56), 18 states have call predecessors, (56), 21 states have call successors, (56) [2025-03-17 15:44:38,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 217 transitions. [2025-03-17 15:44:38,792 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 217 transitions. Word has length 1575 [2025-03-17 15:44:38,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:38,792 INFO L471 AbstractCegarLoop]: Abstraction has 169 states and 217 transitions. [2025-03-17 15:44:38,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.2727272727272725) internal successors, (207), 33 states have internal predecessors, (207), 30 states have call successors, (35), 2 states have call predecessors, (35), 16 states have return successors, (46), 16 states have call predecessors, (46), 30 states have call successors, (46) [2025-03-17 15:44:38,792 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 217 transitions. [2025-03-17 15:44:38,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1733 [2025-03-17 15:44:38,804 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:38,805 INFO L218 NwaCegarLoop]: trace histogram [177, 176, 143, 88, 88, 88, 88, 88, 88, 88, 88, 88, 88, 88, 88, 87, 55, 34, 1, 1, 1, 1] [2025-03-17 15:44:38,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-17 15:44:39,005 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-03-17 15:44:39,005 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-17 15:44:39,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:39,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1065972833, now seen corresponding path program 14 times [2025-03-17 15:44:39,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:39,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331195697] [2025-03-17 15:44:39,006 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:44:39,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:39,038 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1732 statements into 2 equivalence classes. [2025-03-17 15:44:39,173 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1732 of 1732 statements. [2025-03-17 15:44:39,173 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:44:39,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat