./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 798a7b37 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-?-798a7b3-m [2025-03-04 11:27:12,940 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 11:27:12,999 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-04 11:27:13,009 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 11:27:13,009 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 11:27:13,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 11:27:13,028 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 11:27:13,028 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 11:27:13,028 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 11:27:13,029 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 11:27:13,029 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 11:27:13,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 11:27:13,029 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 11:27:13,029 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 11:27:13,029 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 11:27:13,029 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 11:27:13,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-04 11:27:13,029 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 11:27:13,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 11:27:13,030 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 11:27:13,030 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-04 11:27:13,030 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-04 11:27:13,031 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 11:27:13,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 11:27:13,031 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 11:27:13,031 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 11:27:13,031 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 11:27:13,031 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 11:27:13,031 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 [2025-03-04 11:27:13,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 11:27:13,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 11:27:13,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 11:27:13,252 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 11:27:13,252 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 11:27:13,252 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci01-1.c [2025-03-04 11:27:14,367 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020025076/2ef391f6f9d04848b76b0ee644698b49/FLAGe586c02f6 [2025-03-04 11:27:14,536 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 11:27:14,536 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci01-1.c [2025-03-04 11:27:14,540 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020025076/2ef391f6f9d04848b76b0ee644698b49/FLAGe586c02f6 [2025-03-04 11:27:14,912 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/020025076/2ef391f6f9d04848b76b0ee644698b49 [2025-03-04 11:27:14,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 11:27:14,914 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 11:27:14,915 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 11:27:14,915 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 11:27:14,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 11:27:14,918 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 11:27:14" (1/1) ... [2025-03-04 11:27:14,919 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65abf7d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:14, skipping insertion in model container [2025-03-04 11:27:14,919 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 11:27:14" (1/1) ... [2025-03-04 11:27:14,927 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 11:27:15,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 11:27:15,031 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 11:27:15,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 11:27:15,056 INFO L204 MainTranslator]: Completed translation [2025-03-04 11:27:15,056 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15 WrapperNode [2025-03-04 11:27:15,057 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 11:27:15,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 11:27:15,058 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 11:27:15,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 11:27:15,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,066 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,076 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 29 [2025-03-04 11:27:15,077 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 11:27:15,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 11:27:15,078 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 11:27:15,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 11:27:15,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,089 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,099 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]. [2025-03-04 11:27:15,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,103 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,104 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,105 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,105 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,107 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 11:27:15,110 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 11:27:15,110 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 11:27:15,110 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 11:27:15,111 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (1/1) ... [2025-03-04 11:27:15,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 11:27:15,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:15,141 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) [2025-03-04 11:27:15,146 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 [2025-03-04 11:27:15,159 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-03-04 11:27:15,160 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-03-04 11:27:15,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 11:27:15,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 11:27:15,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 11:27:15,160 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 11:27:15,195 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 11:27:15,197 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 11:27:15,261 INFO L1325 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-03-04 11:27:15,301 INFO L? ?]: Removed 19 outVars from TransFormulas that were not future-live. [2025-03-04 11:27:15,301 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 11:27:15,308 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 11:27:15,308 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 11:27:15,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 11:27:15 BoogieIcfgContainer [2025-03-04 11:27:15,309 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 11:27:15,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 11:27:15,310 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 11:27:15,313 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 11:27:15,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 11:27:14" (1/3) ... [2025-03-04 11:27:15,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e9ac68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 11:27:15, skipping insertion in model container [2025-03-04 11:27:15,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 11:27:15" (2/3) ... [2025-03-04 11:27:15,315 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79e9ac68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 11:27:15, skipping insertion in model container [2025-03-04 11:27:15,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 11:27:15" (3/3) ... [2025-03-04 11:27:15,316 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c [2025-03-04 11:27:15,327 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 11:27:15,329 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci01-1.c that has 2 procedures, 36 locations, 1 initial locations, 0 loop locations, and 8 error locations. [2025-03-04 11:27:15,363 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 11:27:15,372 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;@1f268b0e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 11:27:15,372 INFO L334 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2025-03-04 11:27:15,375 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 31 states have internal predecessors, (35), 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) [2025-03-04 11:27:15,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-04 11:27:15,379 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:15,379 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:15,379 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:15,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:15,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2090444154, now seen corresponding path program 1 times [2025-03-04 11:27:15,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:15,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532780780] [2025-03-04 11:27:15,388 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:15,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:15,434 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 11:27:15,447 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 11:27:15,447 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:15,447 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:27:15,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532780780] [2025-03-04 11:27:15,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532780780] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:27:15,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:27:15,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 11:27:15,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96386176] [2025-03-04 11:27:15,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:27:15,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 11:27:15,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:15,509 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 11:27:15,509 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 11:27:15,511 INFO L87 Difference]: Start difference. First operand has 36 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 31 states have internal predecessors, (35), 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 3.5) internal successors, (7), 3 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) [2025-03-04 11:27:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:15,551 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2025-03-04 11:27:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 11:27:15,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 [2025-03-04 11:27:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:15,556 INFO L225 Difference]: With dead ends: 41 [2025-03-04 11:27:15,556 INFO L226 Difference]: Without dead ends: 30 [2025-03-04 11:27:15,558 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 [2025-03-04 11:27:15,559 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 11 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 52 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 [2025-03-04 11:27:15,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 52 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:27:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2025-03-04 11:27:15,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2025-03-04 11:27:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-04 11:27:15,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2025-03-04 11:27:15,587 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 8 [2025-03-04 11:27:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:15,588 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2025-03-04 11:27:15,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2025-03-04 11:27:15,588 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2025-03-04 11:27:15,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-04 11:27:15,589 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:15,589 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:15,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 11:27:15,589 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:15,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:15,590 INFO L85 PathProgramCache]: Analyzing trace with hash -379259349, now seen corresponding path program 1 times [2025-03-04 11:27:15,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:15,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197948160] [2025-03-04 11:27:15,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:15,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:15,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 11:27:15,600 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 11:27:15,600 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:15,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:27:15,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:15,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197948160] [2025-03-04 11:27:15,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197948160] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:27:15,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:27:15,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 11:27:15,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926841092] [2025-03-04 11:27:15,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:27:15,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:27:15,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:15,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:27:15,657 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-04 11:27:15,657 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:27:15,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:15,726 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2025-03-04 11:27:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 11:27:15,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-04 11:27:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:15,727 INFO L225 Difference]: With dead ends: 30 [2025-03-04 11:27:15,727 INFO L226 Difference]: Without dead ends: 26 [2025-03-04 11:27:15,727 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 [2025-03-04 11:27:15,728 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 35 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 [2025-03-04 11:27:15,728 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 35 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:15,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-04 11:27:15,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2025-03-04 11:27:15,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 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) [2025-03-04 11:27:15,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-03-04 11:27:15,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 9 [2025-03-04 11:27:15,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:15,732 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-03-04 11:27:15,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 11:27:15,732 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-03-04 11:27:15,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-04 11:27:15,733 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:15,733 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:15,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 11:27:15,733 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:15,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:15,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1109509450, now seen corresponding path program 1 times [2025-03-04 11:27:15,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:15,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323836407] [2025-03-04 11:27:15,734 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:15,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:15,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 11:27:15,741 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 11:27:15,742 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:15,742 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:15,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 11:27:15,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:15,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323836407] [2025-03-04 11:27:15,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323836407] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:27:15,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:27:15,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 11:27:15,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102917567] [2025-03-04 11:27:15,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:27:15,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 11:27:15,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:15,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 11:27:15,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-04 11:27:15,782 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2025-03-04 11:27:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:15,789 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2025-03-04 11:27:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 11:27:15,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2025-03-04 11:27:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:15,790 INFO L225 Difference]: With dead ends: 24 [2025-03-04 11:27:15,790 INFO L226 Difference]: Without dead ends: 21 [2025-03-04 11:27:15,791 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 [2025-03-04 11:27:15,791 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 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 [2025-03-04 11:27:15,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:27:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-04 11:27:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2025-03-04 11:27:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:27:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2025-03-04 11:27:15,796 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2025-03-04 11:27:15,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:15,796 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2025-03-04 11:27:15,797 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2025-03-04 11:27:15,797 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2025-03-04 11:27:15,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-04 11:27:15,798 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:15,798 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:15,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-04 11:27:15,799 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:15,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1933946615, now seen corresponding path program 1 times [2025-03-04 11:27:15,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:15,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16135217] [2025-03-04 11:27:15,800 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:15,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:15,805 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-04 11:27:15,816 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-04 11:27:15,816 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:15,816 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-04 11:27:15,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:15,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16135217] [2025-03-04 11:27:15,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16135217] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:27:15,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 11:27:15,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 11:27:15,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562890586] [2025-03-04 11:27:15,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:27:15,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:27:15,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:15,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:27:15,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 11:27:15,913 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:27:15,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:15,960 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2025-03-04 11:27:15,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 11:27:15,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2025-03-04 11:27:15,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:15,961 INFO L225 Difference]: With dead ends: 35 [2025-03-04 11:27:15,961 INFO L226 Difference]: Without dead ends: 33 [2025-03-04 11:27:15,961 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 [2025-03-04 11:27:15,962 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 69 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 [2025-03-04 11:27:15,962 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 69 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:27:15,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-03-04 11:27:15,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2025-03-04 11:27:15,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 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) [2025-03-04 11:27:15,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2025-03-04 11:27:15,966 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 30 [2025-03-04 11:27:15,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:15,967 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2025-03-04 11:27:15,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:27:15,967 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2025-03-04 11:27:15,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-04 11:27:15,967 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:15,968 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:15,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 11:27:15,968 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:15,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:15,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1908678859, now seen corresponding path program 1 times [2025-03-04 11:27:15,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:15,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456934148] [2025-03-04 11:27:15,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:15,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:15,972 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-04 11:27:15,978 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 11:27:15,978 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:15,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 11:27:16,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:16,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456934148] [2025-03-04 11:27:16,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456934148] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:16,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848515680] [2025-03-04 11:27:16,073 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:16,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:16,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:16,075 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) [2025-03-04 11:27:16,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 11:27:16,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-04 11:27:16,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 11:27:16,116 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:16,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:16,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-04 11:27:16,120 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 11:27:16,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:16,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 11:27:16,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848515680] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:16,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:16,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-03-04 11:27:16,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267771253] [2025-03-04 11:27:16,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:16,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-04 11:27:16,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:16,327 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-04 11:27:16,328 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-03-04 11:27:16,328 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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) [2025-03-04 11:27:16,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:16,538 INFO L93 Difference]: Finished difference Result 91 states and 129 transitions. [2025-03-04 11:27:16,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 11:27:16,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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 25 [2025-03-04 11:27:16,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:16,539 INFO L225 Difference]: With dead ends: 91 [2025-03-04 11:27:16,539 INFO L226 Difference]: Without dead ends: 65 [2025-03-04 11:27:16,540 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-03-04 11:27:16,541 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 103 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:16,541 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 106 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-04 11:27:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2025-03-04 11:27:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 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) [2025-03-04 11:27:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2025-03-04 11:27:16,548 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 25 [2025-03-04 11:27:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:16,549 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2025-03-04 11:27:16,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 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) [2025-03-04 11:27:16,549 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2025-03-04 11:27:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-04 11:27:16,549 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:16,549 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:16,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:16,750 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 [2025-03-04 11:27:16,750 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:16,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash 970394835, now seen corresponding path program 2 times [2025-03-04 11:27:16,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:16,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519818334] [2025-03-04 11:27:16,751 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:16,758 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-04 11:27:16,769 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 11:27:16,769 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:16,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 11:27:16,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:16,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519818334] [2025-03-04 11:27:16,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519818334] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:16,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832826389] [2025-03-04 11:27:16,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:16,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:16,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:16,848 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) [2025-03-04 11:27:16,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 11:27:16,870 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-03-04 11:27:16,879 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-03-04 11:27:16,879 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:16,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:16,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-04 11:27:16,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 11:27:16,911 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 11:27:16,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832826389] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:27:16,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 11:27:16,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-03-04 11:27:16,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185840048] [2025-03-04 11:27:16,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:27:16,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 11:27:16,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:16,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 11:27:16,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-04 11:27:16,912 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2025-03-04 11:27:16,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:16,936 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2025-03-04 11:27:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 11:27:16,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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 25 [2025-03-04 11:27:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:16,938 INFO L225 Difference]: With dead ends: 60 [2025-03-04 11:27:16,938 INFO L226 Difference]: Without dead ends: 59 [2025-03-04 11:27:16,938 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-04 11:27:16,939 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 51 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 [2025-03-04 11:27:16,939 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 51 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:27:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-04 11:27:16,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2025-03-04 11:27:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 states have internal predecessors, (45), 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) [2025-03-04 11:27:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2025-03-04 11:27:16,951 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2025-03-04 11:27:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:16,951 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2025-03-04 11:27:16,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 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) [2025-03-04 11:27:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2025-03-04 11:27:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-04 11:27:16,952 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:16,952 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:16,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:17,152 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 [2025-03-04 11:27:17,153 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:17,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:17,153 INFO L85 PathProgramCache]: Analyzing trace with hash 2105362091, now seen corresponding path program 1 times [2025-03-04 11:27:17,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:17,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77261385] [2025-03-04 11:27:17,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:17,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:17,165 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-04 11:27:17,171 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-04 11:27:17,171 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:17,171 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-04 11:27:17,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:17,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77261385] [2025-03-04 11:27:17,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77261385] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:17,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918196552] [2025-03-04 11:27:17,214 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:17,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:17,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:17,216 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) [2025-03-04 11:27:17,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 11:27:17,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-04 11:27:17,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-04 11:27:17,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:17,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:17,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-04 11:27:17,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:17,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-04 11:27:17,279 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 11:27:17,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918196552] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 11:27:17,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 11:27:17,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-04 11:27:17,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830362381] [2025-03-04 11:27:17,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 11:27:17,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 11:27:17,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:17,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 11:27:17,281 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-04 11:27:17,281 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:27:17,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:17,309 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2025-03-04 11:27:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-04 11:27:17,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2025-03-04 11:27:17,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:17,311 INFO L225 Difference]: With dead ends: 82 [2025-03-04 11:27:17,311 INFO L226 Difference]: Without dead ends: 81 [2025-03-04 11:27:17,311 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-04 11:27:17,311 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:17,312 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 71 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:27:17,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-03-04 11:27:17,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2025-03-04 11:27:17,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 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) [2025-03-04 11:27:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2025-03-04 11:27:17,322 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 32 [2025-03-04 11:27:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:17,325 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2025-03-04 11:27:17,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-04 11:27:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2025-03-04 11:27:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2025-03-04 11:27:17,326 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:17,326 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, 1] [2025-03-04 11:27:17,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:17,526 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 [2025-03-04 11:27:17,527 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:17,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:17,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1579819353, now seen corresponding path program 1 times [2025-03-04 11:27:17,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:17,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406433002] [2025-03-04 11:27:17,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:17,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:17,531 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-04 11:27:17,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-04 11:27:17,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:17,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-04 11:27:17,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406433002] [2025-03-04 11:27:17,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406433002] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:17,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166515394] [2025-03-04 11:27:17,668 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:17,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:17,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:17,671 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) [2025-03-04 11:27:17,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 11:27:17,693 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 52 statements into 1 equivalence classes. [2025-03-04 11:27:17,706 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 52 of 52 statements. [2025-03-04 11:27:17,706 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:17,706 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:17,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 11:27:17,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-03-04 11:27:17,784 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-04 11:27:17,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166515394] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:17,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:17,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-03-04 11:27:17,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015179638] [2025-03-04 11:27:17,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:17,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 11:27:17,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:17,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 11:27:17,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-03-04 11:27:17,954 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 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) [2025-03-04 11:27:18,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:18,107 INFO L93 Difference]: Finished difference Result 141 states and 217 transitions. [2025-03-04 11:27:18,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-04 11:27:18,107 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 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 52 [2025-03-04 11:27:18,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:18,109 INFO L225 Difference]: With dead ends: 141 [2025-03-04 11:27:18,109 INFO L226 Difference]: Without dead ends: 139 [2025-03-04 11:27:18,110 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-03-04 11:27:18,110 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:18,110 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 146 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-03-04 11:27:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2025-03-04 11:27:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 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) [2025-03-04 11:27:18,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 159 transitions. [2025-03-04 11:27:18,122 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 159 transitions. Word has length 52 [2025-03-04 11:27:18,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:18,122 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 159 transitions. [2025-03-04 11:27:18,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 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) [2025-03-04 11:27:18,123 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 159 transitions. [2025-03-04 11:27:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2025-03-04 11:27:18,124 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:18,124 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:18,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:18,325 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 [2025-03-04 11:27:18,325 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:18,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:18,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1045412814, now seen corresponding path program 1 times [2025-03-04 11:27:18,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:18,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842167906] [2025-03-04 11:27:18,326 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:18,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:18,330 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-03-04 11:27:18,335 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-03-04 11:27:18,335 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:18,335 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 38 proven. 80 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-04 11:27:18,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:18,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842167906] [2025-03-04 11:27:18,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842167906] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:18,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606712102] [2025-03-04 11:27:18,441 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 11:27:18,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:18,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:18,443 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) [2025-03-04 11:27:18,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 11:27:18,467 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 82 statements into 1 equivalence classes. [2025-03-04 11:27:18,485 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 82 of 82 statements. [2025-03-04 11:27:18,486 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:18,486 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:18,486 INFO L256 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 11:27:18,488 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:18,565 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 50 proven. 84 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-04 11:27:18,566 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 50 proven. 87 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-04 11:27:18,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606712102] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:18,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:18,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 16 [2025-03-04 11:27:18,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635379432] [2025-03-04 11:27:18,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:18,837 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-04 11:27:18,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:18,838 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-04 11:27:18,838 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-04 11:27:18,838 INFO L87 Difference]: Start difference. First operand 98 states and 159 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) [2025-03-04 11:27:18,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:18,975 INFO L93 Difference]: Finished difference Result 174 states and 299 transitions. [2025-03-04 11:27:18,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-04 11:27:18,977 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 82 [2025-03-04 11:27:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:18,978 INFO L225 Difference]: With dead ends: 174 [2025-03-04 11:27:18,978 INFO L226 Difference]: Without dead ends: 80 [2025-03-04 11:27:18,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2025-03-04 11:27:18,983 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:18,983 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 81 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:18,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-04 11:27:18,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2025-03-04 11:27:18,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 53 states have internal predecessors, (61), 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) [2025-03-04 11:27:18,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2025-03-04 11:27:18,993 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 82 [2025-03-04 11:27:18,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:18,993 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2025-03-04 11:27:18,993 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) [2025-03-04 11:27:18,993 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2025-03-04 11:27:18,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2025-03-04 11:27:18,998 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:18,998 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 1, 1, 1, 1, 1] [2025-03-04 11:27:19,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-04 11:27:19,202 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 [2025-03-04 11:27:19,203 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:19,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:19,203 INFO L85 PathProgramCache]: Analyzing trace with hash -371576086, now seen corresponding path program 2 times [2025-03-04 11:27:19,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:19,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485702376] [2025-03-04 11:27:19,203 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:19,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:19,208 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 122 statements into 2 equivalence classes. [2025-03-04 11:27:19,220 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 122 of 122 statements. [2025-03-04 11:27:19,221 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:19,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 49 proven. 134 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2025-03-04 11:27:19,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:19,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485702376] [2025-03-04 11:27:19,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485702376] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:19,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974295978] [2025-03-04 11:27:19,346 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:19,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:19,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:19,348 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) [2025-03-04 11:27:19,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 11:27:19,371 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 122 statements into 2 equivalence classes. [2025-03-04 11:27:19,392 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 122 of 122 statements. [2025-03-04 11:27:19,393 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:19,393 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:19,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-04 11:27:19,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:19,443 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 264 proven. 15 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2025-03-04 11:27:19,443 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 50 proven. 166 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-03-04 11:27:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974295978] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:19,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:19,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2025-03-04 11:27:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701317210] [2025-03-04 11:27:19,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:19,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 11:27:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:19,687 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 11:27:19,687 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-04 11:27:19,687 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2025-03-04 11:27:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:19,767 INFO L93 Difference]: Finished difference Result 129 states and 179 transitions. [2025-03-04 11:27:19,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 11:27:19,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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 122 [2025-03-04 11:27:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:19,768 INFO L225 Difference]: With dead ends: 129 [2025-03-04 11:27:19,769 INFO L226 Difference]: Without dead ends: 63 [2025-03-04 11:27:19,769 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 236 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-03-04 11:27:19,770 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 26 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:19,770 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 77 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:19,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-04 11:27:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2025-03-04 11:27:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 46 states have internal predecessors, (53), 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) [2025-03-04 11:27:19,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-03-04 11:27:19,777 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 122 [2025-03-04 11:27:19,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:19,777 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-03-04 11:27:19,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 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) [2025-03-04 11:27:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-03-04 11:27:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2025-03-04 11:27:19,780 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:19,780 INFO L218 NwaCegarLoop]: trace histogram [12, 10, 10, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2025-03-04 11:27:19,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:19,981 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 [2025-03-04 11:27:19,981 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:19,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:19,982 INFO L85 PathProgramCache]: Analyzing trace with hash 571868715, now seen corresponding path program 3 times [2025-03-04 11:27:19,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:19,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022188610] [2025-03-04 11:27:19,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:19,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:19,986 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 110 statements into 10 equivalence classes. [2025-03-04 11:27:19,994 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 71 of 110 statements. [2025-03-04 11:27:19,995 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-04 11:27:19,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 100 proven. 25 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2025-03-04 11:27:20,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:20,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022188610] [2025-03-04 11:27:20,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022188610] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:20,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680971622] [2025-03-04 11:27:20,172 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:20,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:20,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:20,174 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) [2025-03-04 11:27:20,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 11:27:20,201 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 110 statements into 10 equivalence classes. [2025-03-04 11:27:20,218 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) and asserted 71 of 110 statements. [2025-03-04 11:27:20,219 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2025-03-04 11:27:20,219 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:20,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-04 11:27:20,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:20,307 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-03-04 11:27:20,307 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2025-03-04 11:27:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680971622] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:20,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:20,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 19 [2025-03-04 11:27:20,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574365005] [2025-03-04 11:27:20,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:20,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-04 11:27:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:20,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-04 11:27:20,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2025-03-04 11:27:20,631 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 5 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) [2025-03-04 11:27:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:20,694 INFO L93 Difference]: Finished difference Result 64 states and 78 transitions. [2025-03-04 11:27:20,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 11:27:20,694 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 5 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) Word has length 110 [2025-03-04 11:27:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:20,695 INFO L225 Difference]: With dead ends: 64 [2025-03-04 11:27:20,695 INFO L226 Difference]: Without dead ends: 63 [2025-03-04 11:27:20,695 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 205 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2025-03-04 11:27:20,696 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 3 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:20,696 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 171 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-04 11:27:20,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-04 11:27:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 56. [2025-03-04 11:27:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (14), 8 states have call predecessors, (14), 5 states have call successors, (14) [2025-03-04 11:27:20,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2025-03-04 11:27:20,702 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 110 [2025-03-04 11:27:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:20,706 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2025-03-04 11:27:20,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 5 states have call successors, (7), 1 states have call predecessors, (7), 6 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) [2025-03-04 11:27:20,706 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2025-03-04 11:27:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2025-03-04 11:27:20,708 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:20,708 INFO L218 NwaCegarLoop]: trace histogram [18, 15, 15, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 3, 1, 1, 1, 1, 1] [2025-03-04 11:27:20,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:20,908 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 [2025-03-04 11:27:20,909 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:20,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1791947000, now seen corresponding path program 2 times [2025-03-04 11:27:20,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:20,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133004561] [2025-03-04 11:27:20,909 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:20,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:20,917 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 165 statements into 2 equivalence classes. [2025-03-04 11:27:20,929 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 165 of 165 statements. [2025-03-04 11:27:20,929 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:20,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:21,129 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 120 proven. 355 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2025-03-04 11:27:21,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:21,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133004561] [2025-03-04 11:27:21,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133004561] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:21,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096282750] [2025-03-04 11:27:21,130 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:21,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:21,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:21,131 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) [2025-03-04 11:27:21,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 11:27:21,162 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 165 statements into 2 equivalence classes. [2025-03-04 11:27:21,187 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 165 of 165 statements. [2025-03-04 11:27:21,187 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:21,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:21,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 11:27:21,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:21,269 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 515 proven. 189 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2025-03-04 11:27:21,270 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 141 proven. 410 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2025-03-04 11:27:21,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096282750] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:21,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:21,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14] total 19 [2025-03-04 11:27:21,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629081601] [2025-03-04 11:27:21,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:21,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 11:27:21,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:21,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 11:27:21,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-03-04 11:27:21,673 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 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) [2025-03-04 11:27:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:21,854 INFO L93 Difference]: Finished difference Result 136 states and 171 transitions. [2025-03-04 11:27:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-04 11:27:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 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 165 [2025-03-04 11:27:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:21,856 INFO L225 Difference]: With dead ends: 136 [2025-03-04 11:27:21,856 INFO L226 Difference]: Without dead ends: 86 [2025-03-04 11:27:21,856 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 321 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2025-03-04 11:27:21,857 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 132 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:21,857 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 89 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:21,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-03-04 11:27:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 74. [2025-03-04 11:27:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 57 states have internal predecessors, (64), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (17), 11 states have call predecessors, (17), 7 states have call successors, (17) [2025-03-04 11:27:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 89 transitions. [2025-03-04 11:27:21,861 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 89 transitions. Word has length 165 [2025-03-04 11:27:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:21,861 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 89 transitions. [2025-03-04 11:27:21,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.894736842105263) internal successors, (112), 19 states have internal predecessors, (112), 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) [2025-03-04 11:27:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 89 transitions. [2025-03-04 11:27:21,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2025-03-04 11:27:21,862 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:21,862 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2025-03-04 11:27:21,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-04 11:27:22,066 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 [2025-03-04 11:27:22,066 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:22,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash 702459935, now seen corresponding path program 3 times [2025-03-04 11:27:22,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:22,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239028447] [2025-03-04 11:27:22,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:22,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:22,070 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 8 equivalence classes. [2025-03-04 11:27:22,075 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 80 of 92 statements. [2025-03-04 11:27:22,075 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 11:27:22,076 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:22,166 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 101 proven. 48 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-03-04 11:27:22,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239028447] [2025-03-04 11:27:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239028447] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582780512] [2025-03-04 11:27:22,166 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:22,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:22,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:22,168 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) [2025-03-04 11:27:22,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 11:27:22,197 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 92 statements into 8 equivalence classes. [2025-03-04 11:27:22,211 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 80 of 92 statements. [2025-03-04 11:27:22,211 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-04 11:27:22,211 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:22,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-04 11:27:22,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 8 proven. 66 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2025-03-04 11:27:22,358 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-03-04 11:27:22,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582780512] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:22,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:22,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 13] total 32 [2025-03-04 11:27:22,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886721621] [2025-03-04 11:27:22,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:22,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-04 11:27:22,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:22,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-04 11:27:22,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2025-03-04 11:27:22,931 INFO L87 Difference]: Start difference. First operand 74 states and 89 transitions. Second operand has 32 states, 32 states have (on average 3.1875) internal successors, (102), 32 states have internal predecessors, (102), 12 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (22), 19 states have call predecessors, (22), 12 states have call successors, (22) [2025-03-04 11:27:23,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:23,561 INFO L93 Difference]: Finished difference Result 196 states and 283 transitions. [2025-03-04 11:27:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-03-04 11:27:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.1875) internal successors, (102), 32 states have internal predecessors, (102), 12 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (22), 19 states have call predecessors, (22), 12 states have call successors, (22) Word has length 92 [2025-03-04 11:27:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:23,562 INFO L225 Difference]: With dead ends: 196 [2025-03-04 11:27:23,562 INFO L226 Difference]: Without dead ends: 128 [2025-03-04 11:27:23,564 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 166 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=767, Invalid=3139, Unknown=0, NotChecked=0, Total=3906 [2025-03-04 11:27:23,564 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 190 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:23,564 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 99 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 11:27:23,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2025-03-04 11:27:23,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 101. [2025-03-04 11:27:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.0375) internal successors, (83), 78 states have internal predecessors, (83), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (47), 16 states have call predecessors, (47), 10 states have call successors, (47) [2025-03-04 11:27:23,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 141 transitions. [2025-03-04 11:27:23,571 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 141 transitions. Word has length 92 [2025-03-04 11:27:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:23,571 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 141 transitions. [2025-03-04 11:27:23,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.1875) internal successors, (102), 32 states have internal predecessors, (102), 12 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (22), 19 states have call predecessors, (22), 12 states have call successors, (22) [2025-03-04 11:27:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 141 transitions. [2025-03-04 11:27:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2025-03-04 11:27:23,573 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:23,574 INFO L218 NwaCegarLoop]: trace histogram [40, 38, 32, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 18, 12, 8, 1, 1, 1, 1, 1] [2025-03-04 11:27:23,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:23,778 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 [2025-03-04 11:27:23,778 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:23,778 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash 414443212, now seen corresponding path program 4 times [2025-03-04 11:27:23,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:23,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554730533] [2025-03-04 11:27:23,778 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 11:27:23,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:23,787 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 385 statements into 2 equivalence classes. [2025-03-04 11:27:23,796 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 228 of 385 statements. [2025-03-04 11:27:23,796 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-04 11:27:23,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5229 backedges. 455 proven. 1234 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2025-03-04 11:27:24,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:24,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554730533] [2025-03-04 11:27:24,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554730533] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:24,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680739701] [2025-03-04 11:27:24,011 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 11:27:24,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:24,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:24,013 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) [2025-03-04 11:27:24,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 11:27:24,057 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 385 statements into 2 equivalence classes. [2025-03-04 11:27:24,090 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 228 of 385 statements. [2025-03-04 11:27:24,091 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-04 11:27:24,091 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:24,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-04 11:27:24,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 5229 backedges. 426 proven. 1723 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2025-03-04 11:27:24,221 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5229 backedges. 426 proven. 1762 refuted. 0 times theorem prover too weak. 3041 trivial. 0 not checked. [2025-03-04 11:27:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680739701] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:25,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:25,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 19] total 24 [2025-03-04 11:27:25,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601540091] [2025-03-04 11:27:25,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:25,163 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-04 11:27:25,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:25,164 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-04 11:27:25,164 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-03-04 11:27:25,164 INFO L87 Difference]: Start difference. First operand 101 states and 141 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 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) [2025-03-04 11:27:25,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:25,410 INFO L93 Difference]: Finished difference Result 251 states and 397 transitions. [2025-03-04 11:27:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-03-04 11:27:25,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 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 385 [2025-03-04 11:27:25,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:25,411 INFO L225 Difference]: With dead ends: 251 [2025-03-04 11:27:25,411 INFO L226 Difference]: Without dead ends: 156 [2025-03-04 11:27:25,412 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 757 SyntacticMatches, 9 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=416, Invalid=1144, Unknown=0, NotChecked=0, Total=1560 [2025-03-04 11:27:25,413 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 245 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:25,413 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 132 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2025-03-04 11:27:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 140. [2025-03-04 11:27:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 108 states have internal predecessors, (117), 15 states have call successors, (15), 8 states have call predecessors, (15), 12 states have return successors, (57), 23 states have call predecessors, (57), 14 states have call successors, (57) [2025-03-04 11:27:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 189 transitions. [2025-03-04 11:27:25,423 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 189 transitions. Word has length 385 [2025-03-04 11:27:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:25,423 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 189 transitions. [2025-03-04 11:27:25,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 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) [2025-03-04 11:27:25,423 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 189 transitions. [2025-03-04 11:27:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2025-03-04 11:27:25,426 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:25,426 INFO L218 NwaCegarLoop]: trace histogram [36, 34, 29, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 11, 7, 1, 1, 1, 1, 1] [2025-03-04 11:27:25,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 11:27:25,630 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 [2025-03-04 11:27:25,630 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:25,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:25,631 INFO L85 PathProgramCache]: Analyzing trace with hash -425813805, now seen corresponding path program 5 times [2025-03-04 11:27:25,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:25,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779138616] [2025-03-04 11:27:25,631 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 11:27:25,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:25,642 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 346 statements into 27 equivalence classes. [2025-03-04 11:27:25,658 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 197 of 346 statements. [2025-03-04 11:27:25,658 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-04 11:27:25,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 734 proven. 1144 refuted. 0 times theorem prover too weak. 2321 trivial. 0 not checked. [2025-03-04 11:27:25,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779138616] [2025-03-04 11:27:25,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779138616] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146087965] [2025-03-04 11:27:25,887 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 11:27:25,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:25,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:25,889 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) [2025-03-04 11:27:25,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 11:27:25,942 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 346 statements into 27 equivalence classes. [2025-03-04 11:27:25,977 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 197 of 346 statements. [2025-03-04 11:27:25,977 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-04 11:27:25,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:25,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-03-04 11:27:25,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 740 proven. 1135 refuted. 0 times theorem prover too weak. 2324 trivial. 0 not checked. [2025-03-04 11:27:26,123 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 737 proven. 1177 refuted. 0 times theorem prover too weak. 2285 trivial. 0 not checked. [2025-03-04 11:27:27,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146087965] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:27,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:27,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 20] total 26 [2025-03-04 11:27:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675067575] [2025-03-04 11:27:27,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:27,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-04 11:27:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:27,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-04 11:27:27,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2025-03-04 11:27:27,087 INFO L87 Difference]: Start difference. First operand 140 states and 189 transitions. Second operand has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 17 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-04 11:27:27,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:27,419 INFO L93 Difference]: Finished difference Result 279 states and 428 transitions. [2025-03-04 11:27:27,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-03-04 11:27:27,419 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 17 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 17 states have call successors, (27) Word has length 346 [2025-03-04 11:27:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:27,421 INFO L225 Difference]: With dead ends: 279 [2025-03-04 11:27:27,421 INFO L226 Difference]: Without dead ends: 145 [2025-03-04 11:27:27,424 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 681 SyntacticMatches, 9 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=519, Invalid=1373, Unknown=0, NotChecked=0, Total=1892 [2025-03-04 11:27:27,425 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 189 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:27,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 153 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:27:27,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2025-03-04 11:27:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 122. [2025-03-04 11:27:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 95 states have internal predecessors, (104), 14 states have call successors, (14), 11 states have call predecessors, (14), 8 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2025-03-04 11:27:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 150 transitions. [2025-03-04 11:27:27,437 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 150 transitions. Word has length 346 [2025-03-04 11:27:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:27,437 INFO L471 AbstractCegarLoop]: Abstraction has 122 states and 150 transitions. [2025-03-04 11:27:27,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.1923076923076925) internal successors, (135), 26 states have internal predecessors, (135), 17 states have call successors, (23), 1 states have call predecessors, (23), 9 states have return successors, (27), 13 states have call predecessors, (27), 17 states have call successors, (27) [2025-03-04 11:27:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 150 transitions. [2025-03-04 11:27:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2025-03-04 11:27:27,440 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:27,440 INFO L218 NwaCegarLoop]: trace histogram [28, 26, 23, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 9, 5, 1, 1, 1, 1, 1] [2025-03-04 11:27:27,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:27,644 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 [2025-03-04 11:27:27,644 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:27,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:27,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2016075377, now seen corresponding path program 6 times [2025-03-04 11:27:27,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:27,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250418571] [2025-03-04 11:27:27,644 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 11:27:27,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:27,653 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 268 statements into 20 equivalence classes. [2025-03-04 11:27:27,674 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 191 of 268 statements. [2025-03-04 11:27:27,674 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-04 11:27:27,674 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 524 proven. 695 refuted. 0 times theorem prover too weak. 1259 trivial. 0 not checked. [2025-03-04 11:27:27,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250418571] [2025-03-04 11:27:27,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250418571] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:27,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16283015] [2025-03-04 11:27:27,851 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 11:27:27,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:27,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:27,853 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) [2025-03-04 11:27:27,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 11:27:27,904 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 268 statements into 20 equivalence classes. [2025-03-04 11:27:27,935 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) and asserted 191 of 268 statements. [2025-03-04 11:27:27,935 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2025-03-04 11:27:27,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:27,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-04 11:27:27,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:28,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 519 proven. 734 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2025-03-04 11:27:28,037 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2478 backedges. 515 proven. 786 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2025-03-04 11:27:29,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16283015] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:29,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:29,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 18] total 24 [2025-03-04 11:27:29,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562739137] [2025-03-04 11:27:29,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:29,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-04 11:27:29,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:29,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-04 11:27:29,044 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2025-03-04 11:27:29,044 INFO L87 Difference]: Start difference. First operand 122 states and 150 transitions. Second operand has 24 states, 24 states have (on average 5.75) internal successors, (138), 24 states have internal predecessors, (138), 19 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (29), 14 states have call predecessors, (29), 19 states have call successors, (29) [2025-03-04 11:27:29,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:29,259 INFO L93 Difference]: Finished difference Result 246 states and 327 transitions. [2025-03-04 11:27:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-04 11:27:29,259 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.75) internal successors, (138), 24 states have internal predecessors, (138), 19 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (29), 14 states have call predecessors, (29), 19 states have call successors, (29) Word has length 268 [2025-03-04 11:27:29,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:29,260 INFO L225 Difference]: With dead ends: 246 [2025-03-04 11:27:29,260 INFO L226 Difference]: Without dead ends: 130 [2025-03-04 11:27:29,261 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 522 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=810, Unknown=0, NotChecked=0, Total=1122 [2025-03-04 11:27:29,261 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 88 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:29,261 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 182 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:27:29,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2025-03-04 11:27:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2025-03-04 11:27:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 101 states have internal predecessors, (108), 16 states have call successors, (16), 14 states have call predecessors, (16), 7 states have return successors, (30), 12 states have call predecessors, (30), 15 states have call successors, (30) [2025-03-04 11:27:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 154 transitions. [2025-03-04 11:27:29,267 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 154 transitions. Word has length 268 [2025-03-04 11:27:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:29,269 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 154 transitions. [2025-03-04 11:27:29,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.75) internal successors, (138), 24 states have internal predecessors, (138), 19 states have call successors, (24), 1 states have call predecessors, (24), 9 states have return successors, (29), 14 states have call predecessors, (29), 19 states have call successors, (29) [2025-03-04 11:27:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 154 transitions. [2025-03-04 11:27:29,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2025-03-04 11:27:29,272 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:29,272 INFO L218 NwaCegarLoop]: trace histogram [78, 75, 63, 39, 39, 39, 39, 38, 38, 38, 38, 38, 37, 37, 37, 36, 24, 15, 1, 1, 1, 1, 1] [2025-03-04 11:27:29,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:29,477 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 [2025-03-04 11:27:29,478 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:29,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:29,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1691739982, now seen corresponding path program 7 times [2025-03-04 11:27:29,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:29,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21884420] [2025-03-04 11:27:29,479 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 11:27:29,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:29,491 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 753 statements into 1 equivalence classes. [2025-03-04 11:27:29,532 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 753 of 753 statements. [2025-03-04 11:27:29,532 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:29,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 20542 backedges. 1130 proven. 4277 refuted. 0 times theorem prover too weak. 15135 trivial. 0 not checked. [2025-03-04 11:27:30,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21884420] [2025-03-04 11:27:30,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21884420] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609224533] [2025-03-04 11:27:30,309 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 11:27:30,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:30,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:30,311 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) [2025-03-04 11:27:30,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 11:27:30,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 753 statements into 1 equivalence classes. [2025-03-04 11:27:30,478 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 753 of 753 statements. [2025-03-04 11:27:30,478 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:27:30,478 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:30,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-04 11:27:30,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20542 backedges. 10375 proven. 2740 refuted. 0 times theorem prover too weak. 7427 trivial. 0 not checked. [2025-03-04 11:27:30,639 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20542 backedges. 1365 proven. 5156 refuted. 0 times theorem prover too weak. 14021 trivial. 0 not checked. [2025-03-04 11:27:32,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609224533] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:32,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:32,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 25] total 30 [2025-03-04 11:27:32,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460230462] [2025-03-04 11:27:32,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:32,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-04 11:27:32,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:32,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-04 11:27:32,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2025-03-04 11:27:32,158 INFO L87 Difference]: Start difference. First operand 128 states and 154 transitions. Second operand has 30 states, 30 states have (on average 6.0) internal successors, (180), 30 states have internal predecessors, (180), 25 states have call successors, (32), 4 states have call predecessors, (32), 12 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) [2025-03-04 11:27:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:32,498 INFO L93 Difference]: Finished difference Result 292 states and 377 transitions. [2025-03-04 11:27:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-04 11:27:32,498 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.0) internal successors, (180), 30 states have internal predecessors, (180), 25 states have call successors, (32), 4 states have call predecessors, (32), 12 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) Word has length 753 [2025-03-04 11:27:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:32,501 INFO L225 Difference]: With dead ends: 292 [2025-03-04 11:27:32,501 INFO L226 Difference]: Without dead ends: 170 [2025-03-04 11:27:32,503 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1557 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=2284, Unknown=0, NotChecked=0, Total=3080 [2025-03-04 11:27:32,503 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 350 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:32,504 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 152 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:32,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-03-04 11:27:32,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 125. [2025-03-04 11:27:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 100 states have (on average 1.03) internal successors, (103), 99 states have internal predecessors, (103), 16 states have call successors, (16), 12 states have call predecessors, (16), 8 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) [2025-03-04 11:27:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2025-03-04 11:27:32,511 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 753 [2025-03-04 11:27:32,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:32,511 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2025-03-04 11:27:32,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.0) internal successors, (180), 30 states have internal predecessors, (180), 25 states have call successors, (32), 4 states have call predecessors, (32), 12 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) [2025-03-04 11:27:32,512 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2025-03-04 11:27:32,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2025-03-04 11:27:32,513 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:32,513 INFO L218 NwaCegarLoop]: trace histogram [41, 40, 33, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 13, 8, 1, 1, 1, 1, 1] [2025-03-04 11:27:32,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-04 11:27:32,714 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 [2025-03-04 11:27:32,714 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:32,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:32,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1533995583, now seen corresponding path program 8 times [2025-03-04 11:27:32,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:32,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154812486] [2025-03-04 11:27:32,715 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:32,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:32,722 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 399 statements into 2 equivalence classes. [2025-03-04 11:27:32,740 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 399 of 399 statements. [2025-03-04 11:27:32,740 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:32,740 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 830 proven. 1470 refuted. 0 times theorem prover too weak. 3328 trivial. 0 not checked. [2025-03-04 11:27:34,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:34,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154812486] [2025-03-04 11:27:34,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154812486] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:34,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984079448] [2025-03-04 11:27:34,164 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:27:34,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:34,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:34,167 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) [2025-03-04 11:27:34,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 11:27:34,243 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 399 statements into 2 equivalence classes. [2025-03-04 11:27:34,300 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 399 of 399 statements. [2025-03-04 11:27:34,300 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:27:34,300 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:34,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-03-04 11:27:34,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2025-03-04 11:27:34,572 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:27:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 1149 proven. 1015 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2025-03-04 11:27:39,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984079448] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:27:39,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:27:39,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 45 [2025-03-04 11:27:39,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909490038] [2025-03-04 11:27:39,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:27:39,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-04 11:27:39,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:27:39,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-04 11:27:39,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2025-03-04 11:27:39,283 INFO L87 Difference]: Start difference. First operand 125 states and 154 transitions. Second operand has 46 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 46 states have internal predecessors, (119), 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) [2025-03-04 11:27:39,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:27:39,431 INFO L93 Difference]: Finished difference Result 156 states and 208 transitions. [2025-03-04 11:27:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-04 11:27:39,431 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 46 states have internal predecessors, (119), 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 399 [2025-03-04 11:27:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:27:39,433 INFO L225 Difference]: With dead ends: 156 [2025-03-04 11:27:39,433 INFO L226 Difference]: Without dead ends: 155 [2025-03-04 11:27:39,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 782 SyntacticMatches, 51 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=544, Invalid=1906, Unknown=0, NotChecked=0, Total=2450 [2025-03-04 11:27:39,434 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:27:39,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 226 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:27:39,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-03-04 11:27:39,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 146. [2025-03-04 11:27:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 115 states have internal predecessors, (120), 18 states have call successors, (18), 12 states have call predecessors, (18), 10 states have return successors, (55), 18 states have call predecessors, (55), 17 states have call successors, (55) [2025-03-04 11:27:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 193 transitions. [2025-03-04 11:27:39,442 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 193 transitions. Word has length 399 [2025-03-04 11:27:39,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:27:39,444 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 193 transitions. [2025-03-04 11:27:39,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.6444444444444444) internal successors, (119), 46 states have internal predecessors, (119), 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) [2025-03-04 11:27:39,444 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 193 transitions. [2025-03-04 11:27:39,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1225 [2025-03-04 11:27:39,451 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:27:39,451 INFO L218 NwaCegarLoop]: trace histogram [126, 123, 102, 63, 63, 63, 63, 62, 62, 62, 62, 62, 61, 61, 61, 60, 39, 24, 1, 1, 1, 1, 1] [2025-03-04 11:27:39,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-04 11:27:39,651 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 [2025-03-04 11:27:39,652 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:27:39,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:27:39,652 INFO L85 PathProgramCache]: Analyzing trace with hash 931091757, now seen corresponding path program 9 times [2025-03-04 11:27:39,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:27:39,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868432888] [2025-03-04 11:27:39,653 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:39,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:27:39,673 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1224 statements into 91 equivalence classes. [2025-03-04 11:27:39,783 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) and asserted 834 of 1224 statements. [2025-03-04 11:27:39,783 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2025-03-04 11:27:39,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:47,990 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 16575 proven. 5936 refuted. 0 times theorem prover too weak. 32309 trivial. 0 not checked. [2025-03-04 11:27:47,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:27:47,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868432888] [2025-03-04 11:27:47,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868432888] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:27:47,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483552443] [2025-03-04 11:27:47,990 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 11:27:47,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:27:47,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:27:47,992 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) [2025-03-04 11:27:47,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 11:27:48,148 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1224 statements into 91 equivalence classes. [2025-03-04 11:27:48,371 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) and asserted 834 of 1224 statements. [2025-03-04 11:27:48,371 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 61 check-sat command(s) [2025-03-04 11:27:48,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:27:48,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 165 conjuncts are in the unsatisfiable core [2025-03-04 11:27:48,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:27:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 16360 proven. 4596 refuted. 0 times theorem prover too weak. 33864 trivial. 0 not checked. [2025-03-04 11:27:49,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:28:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 54820 backedges. 17227 proven. 4261 refuted. 0 times theorem prover too weak. 33332 trivial. 0 not checked. [2025-03-04 11:28:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483552443] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:28:06,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:28:06,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 38] total 53 [2025-03-04 11:28:06,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199496527] [2025-03-04 11:28:06,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:28:06,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-03-04 11:28:06,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:28:06,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-03-04 11:28:06,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=2219, Unknown=0, NotChecked=0, Total=2862 [2025-03-04 11:28:06,279 INFO L87 Difference]: Start difference. First operand 146 states and 193 transitions. Second operand has 54 states, 53 states have (on average 2.792452830188679) internal successors, (148), 54 states have internal predecessors, (148), 14 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (39), 38 states have call predecessors, (39), 14 states have call successors, (39) [2025-03-04 11:28:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:28:06,483 INFO L93 Difference]: Finished difference Result 204 states and 304 transitions. [2025-03-04 11:28:06,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-04 11:28:06,483 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.792452830188679) internal successors, (148), 54 states have internal predecessors, (148), 14 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (39), 38 states have call predecessors, (39), 14 states have call successors, (39) Word has length 1224 [2025-03-04 11:28:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:28:06,486 INFO L225 Difference]: With dead ends: 204 [2025-03-04 11:28:06,486 INFO L226 Difference]: Without dead ends: 203 [2025-03-04 11:28:06,487 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2619 GetRequests, 2440 SyntacticMatches, 119 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5525 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2025-03-04 11:28:06,487 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-04 11:28:06,487 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 228 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-04 11:28:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2025-03-04 11:28:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2025-03-04 11:28:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 129 states have internal predecessors, (134), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (83), 22 states have call predecessors, (83), 19 states have call successors, (83) [2025-03-04 11:28:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 237 transitions. [2025-03-04 11:28:06,496 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 237 transitions. Word has length 1224 [2025-03-04 11:28:06,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:28:06,497 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 237 transitions. [2025-03-04 11:28:06,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.792452830188679) internal successors, (148), 54 states have internal predecessors, (148), 14 states have call successors, (16), 1 states have call predecessors, (16), 16 states have return successors, (39), 38 states have call predecessors, (39), 14 states have call successors, (39) [2025-03-04 11:28:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 237 transitions. [2025-03-04 11:28:06,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2055 [2025-03-04 11:28:06,513 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:28:06,514 INFO L218 NwaCegarLoop]: trace histogram [211, 207, 171, 106, 106, 106, 106, 104, 104, 104, 104, 104, 103, 103, 103, 102, 65, 40, 1, 1, 1, 1, 1] [2025-03-04 11:28:06,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-04 11:28:06,718 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 [2025-03-04 11:28:06,718 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:28:06,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:28:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash 447996610, now seen corresponding path program 10 times [2025-03-04 11:28:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:28:06,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641520401] [2025-03-04 11:28:06,719 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 11:28:06,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:28:06,750 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2054 statements into 2 equivalence classes. [2025-03-04 11:28:06,824 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1218 of 2054 statements. [2025-03-04 11:28:06,824 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-04 11:28:06,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 155365 backedges. 2299 proven. 16191 refuted. 0 times theorem prover too weak. 136875 trivial. 0 not checked. [2025-03-04 11:28:08,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:28:08,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641520401] [2025-03-04 11:28:08,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641520401] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:28:08,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712637897] [2025-03-04 11:28:08,470 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 11:28:08,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:28:08,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:28:08,471 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) [2025-03-04 11:28:08,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 11:28:08,806 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 2054 statements into 2 equivalence classes. [2025-03-04 11:28:08,954 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 1218 of 2054 statements. [2025-03-04 11:28:08,954 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-04 11:28:08,954 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:08,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 2546 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-04 11:28:08,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:28:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 155365 backedges. 77441 proven. 5516 refuted. 0 times theorem prover too weak. 72408 trivial. 0 not checked. [2025-03-04 11:28:09,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:28:12,203 INFO L134 CoverageAnalysis]: Checked inductivity of 155365 backedges. 2765 proven. 19164 refuted. 0 times theorem prover too weak. 133436 trivial. 0 not checked. [2025-03-04 11:28:12,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712637897] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:28:12,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:28:12,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 28] total 33 [2025-03-04 11:28:12,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113266392] [2025-03-04 11:28:12,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:28:12,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-04 11:28:12,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:28:12,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-04 11:28:12,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2025-03-04 11:28:12,206 INFO L87 Difference]: Start difference. First operand 164 states and 237 transitions. Second operand has 33 states, 33 states have (on average 5.96969696969697) internal successors, (197), 33 states have internal predecessors, (197), 28 states have call successors, (35), 5 states have call predecessors, (35), 13 states have return successors, (40), 15 states have call predecessors, (40), 25 states have call successors, (40) [2025-03-04 11:28:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:28:12,606 INFO L93 Difference]: Finished difference Result 404 states and 673 transitions. [2025-03-04 11:28:12,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-04 11:28:12,608 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.96969696969697) internal successors, (197), 33 states have internal predecessors, (197), 28 states have call successors, (35), 5 states have call predecessors, (35), 13 states have return successors, (40), 15 states have call predecessors, (40), 25 states have call successors, (40) Word has length 2054 [2025-03-04 11:28:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:28:12,610 INFO L225 Difference]: With dead ends: 404 [2025-03-04 11:28:12,610 INFO L226 Difference]: Without dead ends: 246 [2025-03-04 11:28:12,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4169 GetRequests, 4089 SyntacticMatches, 18 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1036, Invalid=2996, Unknown=0, NotChecked=0, Total=4032 [2025-03-04 11:28:12,613 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 412 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:28:12,613 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 166 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:28:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2025-03-04 11:28:12,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 221. [2025-03-04 11:28:12,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 178 states have (on average 1.0280898876404494) internal successors, (183), 174 states have internal predecessors, (183), 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) [2025-03-04 11:28:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 318 transitions. [2025-03-04 11:28:12,631 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 318 transitions. Word has length 2054 [2025-03-04 11:28:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:28:12,632 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 318 transitions. [2025-03-04 11:28:12,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.96969696969697) internal successors, (197), 33 states have internal predecessors, (197), 28 states have call successors, (35), 5 states have call predecessors, (35), 13 states have return successors, (40), 15 states have call predecessors, (40), 25 states have call successors, (40) [2025-03-04 11:28:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 318 transitions. [2025-03-04 11:28:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1642 [2025-03-04 11:28:12,643 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:28:12,644 INFO L218 NwaCegarLoop]: trace histogram [168, 166, 136, 84, 84, 84, 84, 83, 83, 83, 83, 83, 83, 83, 83, 82, 52, 32, 1, 1, 1, 1, 1] [2025-03-04 11:28:12,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-04 11:28:12,844 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 [2025-03-04 11:28:12,844 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:28:12,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:28:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1505457640, now seen corresponding path program 11 times [2025-03-04 11:28:12,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:28:12,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25969359] [2025-03-04 11:28:12,845 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 11:28:12,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:28:12,870 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1641 statements into 123 equivalence classes. [2025-03-04 11:28:12,972 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) and asserted 1077 of 1641 statements. [2025-03-04 11:28:12,973 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2025-03-04 11:28:12,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 98905 backedges. 10667 proven. 6776 refuted. 0 times theorem prover too weak. 81462 trivial. 0 not checked. [2025-03-04 11:28:14,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:28:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25969359] [2025-03-04 11:28:14,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25969359] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:28:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468652908] [2025-03-04 11:28:14,101 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 11:28:14,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:28:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:28:14,102 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) [2025-03-04 11:28:14,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 11:28:14,431 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1641 statements into 123 equivalence classes. [2025-03-04 11:28:14,673 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) and asserted 1077 of 1641 statements. [2025-03-04 11:28:14,673 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2025-03-04 11:28:14,673 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:14,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 1993 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-04 11:28:14,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:28:14,827 INFO L134 CoverageAnalysis]: Checked inductivity of 98905 backedges. 45639 proven. 2661 refuted. 0 times theorem prover too weak. 50605 trivial. 0 not checked. [2025-03-04 11:28:14,827 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:28:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 98905 backedges. 10667 proven. 6891 refuted. 0 times theorem prover too weak. 81347 trivial. 0 not checked. [2025-03-04 11:28:18,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468652908] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:28:18,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:28:18,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 27] total 29 [2025-03-04 11:28:18,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595293176] [2025-03-04 11:28:18,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:28:18,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-04 11:28:18,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:28:18,958 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-04 11:28:18,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2025-03-04 11:28:18,958 INFO L87 Difference]: Start difference. First operand 221 states and 318 transitions. Second operand has 29 states, 29 states have (on average 6.103448275862069) internal successors, (177), 29 states have internal predecessors, (177), 24 states have call successors, (30), 2 states have call predecessors, (30), 14 states have return successors, (40), 15 states have call predecessors, (40), 24 states have call successors, (40) [2025-03-04 11:28:19,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:28:19,312 INFO L93 Difference]: Finished difference Result 424 states and 646 transitions. [2025-03-04 11:28:19,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-04 11:28:19,312 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.103448275862069) internal successors, (177), 29 states have internal predecessors, (177), 24 states have call successors, (30), 2 states have call predecessors, (30), 14 states have return successors, (40), 15 states have call predecessors, (40), 24 states have call successors, (40) Word has length 1641 [2025-03-04 11:28:19,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:28:19,315 INFO L225 Difference]: With dead ends: 424 [2025-03-04 11:28:19,315 INFO L226 Difference]: Without dead ends: 209 [2025-03-04 11:28:19,316 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3328 GetRequests, 3268 SyntacticMatches, 13 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=609, Invalid=1743, Unknown=0, NotChecked=0, Total=2352 [2025-03-04 11:28:19,317 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 270 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:28:19,317 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 285 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:28:19,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2025-03-04 11:28:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 167. [2025-03-04 11:28:19,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 132 states have internal predecessors, (137), 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) [2025-03-04 11:28:19,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2025-03-04 11:28:19,328 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 1641 [2025-03-04 11:28:19,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:28:19,329 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2025-03-04 11:28:19,329 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.103448275862069) internal successors, (177), 29 states have internal predecessors, (177), 24 states have call successors, (30), 2 states have call predecessors, (30), 14 states have return successors, (40), 15 states have call predecessors, (40), 24 states have call successors, (40) [2025-03-04 11:28:19,330 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2025-03-04 11:28:19,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1996 [2025-03-04 11:28:19,344 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:28:19,345 INFO L218 NwaCegarLoop]: trace histogram [205, 201, 166, 103, 103, 103, 103, 101, 101, 101, 101, 101, 100, 100, 100, 99, 63, 39, 1, 1, 1, 1, 1] [2025-03-04 11:28:19,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-04 11:28:19,545 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 [2025-03-04 11:28:19,545 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:28:19,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:28:19,546 INFO L85 PathProgramCache]: Analyzing trace with hash 2132256759, now seen corresponding path program 12 times [2025-03-04 11:28:19,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:28:19,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190098565] [2025-03-04 11:28:19,546 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 11:28:19,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:28:19,574 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1995 statements into 157 equivalence classes. [2025-03-04 11:28:19,729 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) and asserted 1291 of 1995 statements. [2025-03-04 11:28:19,729 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) [2025-03-04 11:28:19,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 146524 backedges. 7229 proven. 18638 refuted. 0 times theorem prover too weak. 120657 trivial. 0 not checked. [2025-03-04 11:28:22,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:28:22,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190098565] [2025-03-04 11:28:22,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190098565] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:28:22,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791230932] [2025-03-04 11:28:22,089 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 11:28:22,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:28:22,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:28:22,090 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) [2025-03-04 11:28:22,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-04 11:28:22,504 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1995 statements into 157 equivalence classes. [2025-03-04 11:28:22,879 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) and asserted 1291 of 1995 statements. [2025-03-04 11:28:22,879 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 96 check-sat command(s) [2025-03-04 11:28:22,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:22,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 2397 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-04 11:28:22,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:28:23,101 INFO L134 CoverageAnalysis]: Checked inductivity of 146524 backedges. 71366 proven. 9252 refuted. 0 times theorem prover too weak. 65906 trivial. 0 not checked. [2025-03-04 11:28:23,101 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:28:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 146524 backedges. 6677 proven. 17778 refuted. 0 times theorem prover too weak. 122069 trivial. 0 not checked. [2025-03-04 11:28:26,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791230932] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:28:26,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:28:26,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 34] total 41 [2025-03-04 11:28:26,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093963932] [2025-03-04 11:28:26,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:28:26,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2025-03-04 11:28:26,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:28:26,431 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2025-03-04 11:28:26,431 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1385, Unknown=0, NotChecked=0, Total=1640 [2025-03-04 11:28:26,432 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 41 states, 41 states have (on average 5.853658536585366) internal successors, (240), 40 states have internal predecessors, (240), 35 states have call successors, (43), 6 states have call predecessors, (43), 17 states have return successors, (50), 20 states have call predecessors, (50), 31 states have call successors, (50) [2025-03-04 11:28:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:28:27,195 INFO L93 Difference]: Finished difference Result 450 states and 692 transitions. [2025-03-04 11:28:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-03-04 11:28:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.853658536585366) internal successors, (240), 40 states have internal predecessors, (240), 35 states have call successors, (43), 6 states have call predecessors, (43), 17 states have return successors, (50), 20 states have call predecessors, (50), 31 states have call successors, (50) Word has length 1995 [2025-03-04 11:28:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:28:27,199 INFO L225 Difference]: With dead ends: 450 [2025-03-04 11:28:27,199 INFO L226 Difference]: Without dead ends: 289 [2025-03-04 11:28:27,202 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4081 GetRequests, 3974 SyntacticMatches, 17 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1877, Invalid=6495, Unknown=0, NotChecked=0, Total=8372 [2025-03-04 11:28:27,203 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 642 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 11:28:27,203 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [642 Valid, 273 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 11:28:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2025-03-04 11:28:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 254. [2025-03-04 11:28:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 207 states have (on average 1.0338164251207729) internal successors, (214), 202 states have internal predecessors, (214), 33 states have call successors, (33), 26 states have call predecessors, (33), 13 states have return successors, (103), 25 states have call predecessors, (103), 32 states have call successors, (103) [2025-03-04 11:28:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 350 transitions. [2025-03-04 11:28:27,216 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 350 transitions. Word has length 1995 [2025-03-04 11:28:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:28:27,216 INFO L471 AbstractCegarLoop]: Abstraction has 254 states and 350 transitions. [2025-03-04 11:28:27,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.853658536585366) internal successors, (240), 40 states have internal predecessors, (240), 35 states have call successors, (43), 6 states have call predecessors, (43), 17 states have return successors, (50), 20 states have call predecessors, (50), 31 states have call successors, (50) [2025-03-04 11:28:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 350 transitions. [2025-03-04 11:28:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1420 [2025-03-04 11:28:27,225 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:28:27,225 INFO L218 NwaCegarLoop]: trace histogram [145, 144, 117, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 72, 71, 45, 28, 1, 1, 1, 1, 1] [2025-03-04 11:28:27,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-04 11:28:27,426 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 [2025-03-04 11:28:27,426 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:28:27,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:28:27,426 INFO L85 PathProgramCache]: Analyzing trace with hash -999616037, now seen corresponding path program 13 times [2025-03-04 11:28:27,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:28:27,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129917531] [2025-03-04 11:28:27,427 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 11:28:27,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:28:27,447 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1419 statements into 1 equivalence classes. [2025-03-04 11:28:27,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1419 of 1419 statements. [2025-03-04 11:28:27,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:28:27,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 73818 backedges. 8029 proven. 3643 refuted. 0 times theorem prover too weak. 62146 trivial. 0 not checked. [2025-03-04 11:28:29,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:28:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129917531] [2025-03-04 11:28:29,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129917531] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:28:29,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953889059] [2025-03-04 11:28:29,262 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 11:28:29,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:28:29,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:28:29,264 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) [2025-03-04 11:28:29,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-04 11:28:29,630 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1419 statements into 1 equivalence classes. [2025-03-04 11:28:29,784 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1419 of 1419 statements. [2025-03-04 11:28:29,784 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 11:28:29,784 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:29,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 2642 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-04 11:28:29,799 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:28:29,988 INFO L134 CoverageAnalysis]: Checked inductivity of 73818 backedges. 37806 proven. 5527 refuted. 0 times theorem prover too weak. 30485 trivial. 0 not checked. [2025-03-04 11:28:29,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:28:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 73818 backedges. 5120 proven. 11737 refuted. 0 times theorem prover too weak. 56961 trivial. 0 not checked. [2025-03-04 11:28:34,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953889059] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:28:34,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:28:34,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 31] total 36 [2025-03-04 11:28:34,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690804964] [2025-03-04 11:28:34,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:28:34,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-04 11:28:34,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:28:34,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-04 11:28:34,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2025-03-04 11:28:34,355 INFO L87 Difference]: Start difference. First operand 254 states and 350 transitions. Second operand has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 36 states have internal predecessors, (213), 30 states have call successors, (37), 2 states have call predecessors, (37), 16 states have return successors, (51), 18 states have call predecessors, (51), 30 states have call successors, (51) [2025-03-04 11:28:34,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:28:34,732 INFO L93 Difference]: Finished difference Result 514 states and 735 transitions. [2025-03-04 11:28:34,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-04 11:28:34,732 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 36 states have internal predecessors, (213), 30 states have call successors, (37), 2 states have call predecessors, (37), 16 states have return successors, (51), 18 states have call predecessors, (51), 30 states have call successors, (51) Word has length 1419 [2025-03-04 11:28:34,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:28:34,734 INFO L225 Difference]: With dead ends: 514 [2025-03-04 11:28:34,734 INFO L226 Difference]: Without dead ends: 266 [2025-03-04 11:28:34,736 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2883 GetRequests, 2813 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=805, Invalid=2387, Unknown=0, NotChecked=0, Total=3192 [2025-03-04 11:28:34,736 INFO L435 NwaCegarLoop]: 63 mSDtfsCounter, 242 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-04 11:28:34,737 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 280 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-04 11:28:34,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2025-03-04 11:28:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 218. [2025-03-04 11:28:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 174 states have internal predecessors, (182), 29 states have call successors, (29), 23 states have call predecessors, (29), 11 states have return successors, (77), 20 states have call predecessors, (77), 28 states have call successors, (77) [2025-03-04 11:28:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 288 transitions. [2025-03-04 11:28:34,747 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 288 transitions. Word has length 1419 [2025-03-04 11:28:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:28:34,748 INFO L471 AbstractCegarLoop]: Abstraction has 218 states and 288 transitions. [2025-03-04 11:28:34,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.916666666666667) internal successors, (213), 36 states have internal predecessors, (213), 30 states have call successors, (37), 2 states have call predecessors, (37), 16 states have return successors, (51), 18 states have call predecessors, (51), 30 states have call successors, (51) [2025-03-04 11:28:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 288 transitions. [2025-03-04 11:28:34,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1479 [2025-03-04 11:28:34,757 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:28:34,757 INFO L218 NwaCegarLoop]: trace histogram [151, 150, 122, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 74, 47, 29, 1, 1, 1, 1, 1] [2025-03-04 11:28:34,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-04 11:28:34,957 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 [2025-03-04 11:28:34,957 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2025-03-04 11:28:34,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 11:28:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1816906694, now seen corresponding path program 14 times [2025-03-04 11:28:34,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 11:28:34,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054263631] [2025-03-04 11:28:34,958 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:28:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 11:28:34,981 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1478 statements into 2 equivalence classes. [2025-03-04 11:28:35,046 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1478 of 1478 statements. [2025-03-04 11:28:35,047 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:28:35,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 80131 backedges. 6602 proven. 10102 refuted. 0 times theorem prover too weak. 63427 trivial. 0 not checked. [2025-03-04 11:28:37,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 11:28:37,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054263631] [2025-03-04 11:28:37,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054263631] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 11:28:37,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167368507] [2025-03-04 11:28:37,517 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 11:28:37,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 11:28:37,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 11:28:37,519 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) [2025-03-04 11:28:37,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-04 11:28:37,941 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1478 statements into 2 equivalence classes. [2025-03-04 11:28:38,103 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1478 of 1478 statements. [2025-03-04 11:28:38,103 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 11:28:38,103 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 11:28:38,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-04 11:28:38,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 11:28:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 80131 backedges. 7377 proven. 10882 refuted. 0 times theorem prover too weak. 61872 trivial. 0 not checked. [2025-03-04 11:28:38,287 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 11:28:42,337 INFO L134 CoverageAnalysis]: Checked inductivity of 80131 backedges. 7377 proven. 11117 refuted. 0 times theorem prover too weak. 61637 trivial. 0 not checked. [2025-03-04 11:28:42,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167368507] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 11:28:42,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 11:28:42,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 35] total 40 [2025-03-04 11:28:42,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761799754] [2025-03-04 11:28:42,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 11:28:42,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-04 11:28:42,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 11:28:42,340 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-04 11:28:42,340 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1297, Unknown=0, NotChecked=0, Total=1560 [2025-03-04 11:28:42,340 INFO L87 Difference]: Start difference. First operand 218 states and 288 transitions. Second operand has 40 states, 40 states have (on average 5.55) internal successors, (222), 40 states have internal predecessors, (222), 33 states have call successors, (37), 1 states have call predecessors, (37), 17 states have return successors, (50), 19 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-04 11:28:42,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-04 11:28:42,785 INFO L93 Difference]: Finished difference Result 460 states and 629 transitions. [2025-03-04 11:28:42,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-03-04 11:28:42,786 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.55) internal successors, (222), 40 states have internal predecessors, (222), 33 states have call successors, (37), 1 states have call predecessors, (37), 17 states have return successors, (50), 19 states have call predecessors, (50), 33 states have call successors, (50) Word has length 1478 [2025-03-04 11:28:42,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-04 11:28:42,788 INFO L225 Difference]: With dead ends: 460 [2025-03-04 11:28:42,788 INFO L226 Difference]: Without dead ends: 248 [2025-03-04 11:28:42,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3012 GetRequests, 2933 SyntacticMatches, 17 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=999, Invalid=3033, Unknown=0, NotChecked=0, Total=4032 [2025-03-04 11:28:42,790 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 244 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-04 11:28:42,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 391 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-04 11:28:42,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2025-03-04 11:28:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 188. [2025-03-04 11:28:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 151 states have (on average 1.0198675496688743) internal successors, (154), 150 states have internal predecessors, (154), 25 states have call successors, (25), 18 states have call predecessors, (25), 11 states have return successors, (68), 19 states have call predecessors, (68), 24 states have call successors, (68) [2025-03-04 11:28:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 247 transitions. [2025-03-04 11:28:42,800 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 247 transitions. Word has length 1478 [2025-03-04 11:28:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-04 11:28:42,800 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 247 transitions. [2025-03-04 11:28:42,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.55) internal successors, (222), 40 states have internal predecessors, (222), 33 states have call successors, (37), 1 states have call predecessors, (37), 17 states have return successors, (50), 19 states have call predecessors, (50), 33 states have call successors, (50) [2025-03-04 11:28:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 247 transitions. [2025-03-04 11:28:42,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1740 [2025-03-04 11:28:42,812 INFO L210 NwaCegarLoop]: Found error trace [2025-03-04 11:28:42,812 INFO L218 NwaCegarLoop]: trace histogram [178, 176, 144, 89, 89, 89, 89, 88, 88, 88, 88, 88, 88, 88, 88, 87, 55, 34, 1, 1, 1, 1, 1] [2025-03-04 11:28:42,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0