./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Fibonacci05.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci05.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 42036c90cf17a9bca9878c7ba1e2de2c7beff8028a525d1b2b84e3f8cdd299d5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 15:44:19,259 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 15:44:19,313 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-17 15:44:19,317 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 15:44:19,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 15:44:19,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 15:44:19,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 15:44:19,331 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 15:44:19,331 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 15:44:19,331 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 15:44:19,331 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 15:44:19,331 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 15:44:19,332 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 15:44:19,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 15:44:19,332 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 15:44:19,333 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 15:44:19,333 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 15:44:19,333 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 15:44:19,333 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 15:44:19,333 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 15:44:19,333 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 15:44:19,333 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 15:44:19,333 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 15:44:19,333 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 15:44:19,333 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 15:44:19,334 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 15:44:19,334 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 15:44:19,334 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 15:44:19,334 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 15:44:19,334 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 15:44:19,334 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 15:44:19,334 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 15:44:19,334 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 15:44:19,335 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 15:44:19,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 15:44:19,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 15:44:19,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 15:44:19,335 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 15:44:19,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 15:44:19,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 15:44:19,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 15:44:19,335 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 15:44:19,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 15:44:19,336 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 15:44:19,336 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 15:44:19,336 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 -> 42036c90cf17a9bca9878c7ba1e2de2c7beff8028a525d1b2b84e3f8cdd299d5 [2025-03-17 15:44:19,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 15:44:19,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 15:44:19,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 15:44:19,556 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 15:44:19,556 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 15:44:19,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci05.c [2025-03-17 15:44:20,703 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c03bee6/7aa47060fadc41b8b764915213439094/FLAG2fb34f8d9 [2025-03-17 15:44:20,880 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 15:44:20,882 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci05.c [2025-03-17 15:44:20,901 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c03bee6/7aa47060fadc41b8b764915213439094/FLAG2fb34f8d9 [2025-03-17 15:44:21,275 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c03bee6/7aa47060fadc41b8b764915213439094 [2025-03-17 15:44:21,277 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 15:44:21,278 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 15:44:21,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 15:44:21,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 15:44:21,283 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 15:44:21,284 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,284 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d389e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21, skipping insertion in model container [2025-03-17 15:44:21,284 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,295 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 15:44:21,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 15:44:21,396 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 15:44:21,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 15:44:21,417 INFO L204 MainTranslator]: Completed translation [2025-03-17 15:44:21,418 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21 WrapperNode [2025-03-17 15:44:21,418 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 15:44:21,419 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 15:44:21,420 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 15:44:21,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 15:44:21,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,427 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,435 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2025-03-17 15:44:21,436 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 15:44:21,436 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 15:44:21,436 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 15:44:21,436 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 15:44:21,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,441 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,447 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-17 15:44:21,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,448 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,453 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,454 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 15:44:21,454 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 15:44:21,454 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 15:44:21,454 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 15:44:21,455 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (1/1) ... [2025-03-17 15:44:21,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 15:44:21,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:21,478 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 15:44:21,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 15:44:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-03-17 15:44:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-03-17 15:44:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 15:44:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 15:44:21,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 15:44:21,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 15:44:21,531 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 15:44:21,532 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 15:44:21,595 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-03-17 15:44:21,628 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2025-03-17 15:44:21,628 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 15:44:21,634 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 15:44:21,634 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 15:44:21,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 03:44:21 BoogieIcfgContainer [2025-03-17 15:44:21,635 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 15:44:21,636 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 15:44:21,637 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 15:44:21,639 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 15:44:21,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:44:21" (1/3) ... [2025-03-17 15:44:21,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19566ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:44:21, skipping insertion in model container [2025-03-17 15:44:21,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:44:21" (2/3) ... [2025-03-17 15:44:21,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19566ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:44:21, skipping insertion in model container [2025-03-17 15:44:21,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 03:44:21" (3/3) ... [2025-03-17 15:44:21,641 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci05.c [2025-03-17 15:44:21,653 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 15:44:21,654 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci05.c that has 2 procedures, 29 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-03-17 15:44:21,692 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 15:44:21,702 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;@227e37fc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 15:44:21,703 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-17 15:44:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-17 15:44:21,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-17 15:44:21,711 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:21,711 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:44:21,711 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:21,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:21,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1001399972, now seen corresponding path program 1 times [2025-03-17 15:44:21,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:21,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926748633] [2025-03-17 15:44:21,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:21,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:21,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 15:44:21,781 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 15:44:21,781 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:21,781 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 15:44:21,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:21,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926748633] [2025-03-17 15:44:21,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926748633] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:44:21,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:44:21,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 15:44:21,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777370655] [2025-03-17 15:44:21,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:44:21,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 15:44:21,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:21,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 15:44:21,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 15:44:21,869 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 15:44:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:21,912 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2025-03-17 15:44:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 15:44:21,915 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-17 15:44:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:21,919 INFO L225 Difference]: With dead ends: 34 [2025-03-17 15:44:21,919 INFO L226 Difference]: Without dead ends: 24 [2025-03-17 15:44:21,921 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 15:44:21,925 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:21,925 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:44:21,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-17 15:44:21,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2025-03-17 15:44:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:44:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2025-03-17 15:44:21,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2025-03-17 15:44:21,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:21,958 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2025-03-17 15:44:21,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 15:44:21,959 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2025-03-17 15:44:21,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-03-17 15:44:21,960 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:21,960 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:44:21,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 15:44:21,960 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:21,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:21,961 INFO L85 PathProgramCache]: Analyzing trace with hash 978628045, now seen corresponding path program 1 times [2025-03-17 15:44:21,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:21,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346288650] [2025-03-17 15:44:21,962 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:21,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:21,969 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 15:44:21,976 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 15:44:21,977 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:21,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:22,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 15:44:22,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:22,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346288650] [2025-03-17 15:44:22,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346288650] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:44:22,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:44:22,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 15:44:22,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101084721] [2025-03-17 15:44:22,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:44:22,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:44:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:22,023 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:44:22,023 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:44:22,023 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 15:44:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:22,082 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2025-03-17 15:44:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:44:22,083 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-03-17 15:44:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:22,083 INFO L225 Difference]: With dead ends: 24 [2025-03-17 15:44:22,083 INFO L226 Difference]: Without dead ends: 22 [2025-03-17 15:44:22,083 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-17 15:44:22,084 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:22,084 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:44:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-03-17 15:44:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2025-03-17 15:44:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:44:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2025-03-17 15:44:22,091 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2025-03-17 15:44:22,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:22,091 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2025-03-17 15:44:22,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 15:44:22,092 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2025-03-17 15:44:22,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-17 15:44:22,092 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:22,093 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:44:22,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 15:44:22,093 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:22,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:22,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1765718144, now seen corresponding path program 1 times [2025-03-17 15:44:22,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:22,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227400453] [2025-03-17 15:44:22,094 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:22,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:22,102 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 15:44:22,109 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 15:44:22,109 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:22,109 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 15:44:22,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227400453] [2025-03-17 15:44:22,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227400453] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:44:22,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:44:22,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 15:44:22,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403130167] [2025-03-17 15:44:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:44:22,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:44:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:22,228 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:44:22,228 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:44:22,228 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:44:22,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:22,270 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2025-03-17 15:44:22,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:44:22,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2025-03-17 15:44:22,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:22,270 INFO L225 Difference]: With dead ends: 34 [2025-03-17 15:44:22,271 INFO L226 Difference]: Without dead ends: 32 [2025-03-17 15:44:22,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:44:22,271 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:22,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 65 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:44:22,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-03-17 15:44:22,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2025-03-17 15:44:22,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-17 15:44:22,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2025-03-17 15:44:22,277 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 23 [2025-03-17 15:44:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:22,277 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2025-03-17 15:44:22,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:44:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2025-03-17 15:44:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-17 15:44:22,278 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:22,278 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:44:22,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 15:44:22,278 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:22,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:22,279 INFO L85 PathProgramCache]: Analyzing trace with hash -61405293, now seen corresponding path program 1 times [2025-03-17 15:44:22,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:22,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061105501] [2025-03-17 15:44:22,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:22,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:22,284 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 15:44:22,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 15:44:22,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:22,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:44:22,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:22,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061105501] [2025-03-17 15:44:22,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061105501] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:22,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791268922] [2025-03-17 15:44:22,371 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:22,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:22,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:22,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 15:44:22,399 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 15:44:22,416 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 15:44:22,416 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:22,417 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:22,418 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 15:44:22,423 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:22,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 15:44:22,525 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 15:44:22,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791268922] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:22,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:22,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-03-17 15:44:22,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728314788] [2025-03-17 15:44:22,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:22,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 15:44:22,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:22,657 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 15:44:22,658 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-03-17 15:44:22,658 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-17 15:44:22,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:22,893 INFO L93 Difference]: Finished difference Result 90 states and 128 transitions. [2025-03-17 15:44:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 15:44:22,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 30 [2025-03-17 15:44:22,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:22,894 INFO L225 Difference]: With dead ends: 90 [2025-03-17 15:44:22,894 INFO L226 Difference]: Without dead ends: 64 [2025-03-17 15:44:22,895 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-03-17 15:44:22,895 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:22,896 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 82 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:22,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-17 15:44:22,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2025-03-17 15:44:22,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2025-03-17 15:44:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2025-03-17 15:44:22,910 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 30 [2025-03-17 15:44:22,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:22,910 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2025-03-17 15:44:22,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-17 15:44:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2025-03-17 15:44:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-17 15:44:22,912 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:22,912 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:44:22,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 15:44:23,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:23,113 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:23,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash 812217045, now seen corresponding path program 2 times [2025-03-17 15:44:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7764257] [2025-03-17 15:44:23,114 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:44:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:23,118 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 15:44:23,124 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 15:44:23,127 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:44:23,128 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:44:23,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7764257] [2025-03-17 15:44:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7764257] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371021731] [2025-03-17 15:44:23,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:44:23,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:23,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:23,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 15:44:23,252 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 15:44:23,264 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 15:44:23,264 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:44:23,264 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:23,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 15:44:23,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:44:23,313 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 15:44:23,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371021731] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:44:23,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 15:44:23,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-03-17 15:44:23,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63382561] [2025-03-17 15:44:23,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:44:23,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:44:23,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:23,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:44:23,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 15:44:23,314 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:44:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:23,344 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2025-03-17 15:44:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:44:23,345 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2025-03-17 15:44:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:23,346 INFO L225 Difference]: With dead ends: 59 [2025-03-17 15:44:23,347 INFO L226 Difference]: Without dead ends: 58 [2025-03-17 15:44:23,348 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 15:44:23,348 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:23,348 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:44:23,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-03-17 15:44:23,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2025-03-17 15:44:23,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 9 states have call predecessors, (18), 6 states have call successors, (18) [2025-03-17 15:44:23,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2025-03-17 15:44:23,365 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 30 [2025-03-17 15:44:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:23,365 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2025-03-17 15:44:23,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:44:23,365 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2025-03-17 15:44:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-17 15:44:23,366 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:23,366 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] [2025-03-17 15:44:23,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 15:44:23,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:23,567 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:23,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:23,567 INFO L85 PathProgramCache]: Analyzing trace with hash 927255998, now seen corresponding path program 1 times [2025-03-17 15:44:23,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:23,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863627796] [2025-03-17 15:44:23,567 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:23,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:23,570 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 15:44:23,573 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 15:44:23,573 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:23,573 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 15:44:23,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:23,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863627796] [2025-03-17 15:44:23,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863627796] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:23,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934181151] [2025-03-17 15:44:23,624 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:23,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:23,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:23,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:23,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 15:44:23,647 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-17 15:44:23,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-17 15:44:23,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:23,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:23,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 15:44:23,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:23,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 15:44:23,709 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 15:44:23,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934181151] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:44:23,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 15:44:23,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-17 15:44:23,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637036280] [2025-03-17 15:44:23,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:44:23,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 15:44:23,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:23,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 15:44:23,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 15:44:23,710 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:44:23,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:23,735 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2025-03-17 15:44:23,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 15:44:23,736 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2025-03-17 15:44:23,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:23,737 INFO L225 Difference]: With dead ends: 81 [2025-03-17 15:44:23,737 INFO L226 Difference]: Without dead ends: 80 [2025-03-17 15:44:23,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 15:44:23,738 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:23,738 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 53 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:44:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-03-17 15:44:23,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2025-03-17 15:44:23,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (27), 11 states have call predecessors, (27), 7 states have call successors, (27) [2025-03-17 15:44:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2025-03-17 15:44:23,753 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 25 [2025-03-17 15:44:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:23,753 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2025-03-17 15:44:23,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:44:23,755 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2025-03-17 15:44:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2025-03-17 15:44:23,757 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:23,757 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-03-17 15:44:23,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 15:44:23,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:23,957 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:23,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:23,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1033276172, now seen corresponding path program 1 times [2025-03-17 15:44:23,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:23,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701207039] [2025-03-17 15:44:23,958 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:23,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:23,962 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-17 15:44:23,968 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 15:44:23,969 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:23,969 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-17 15:44:24,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:24,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701207039] [2025-03-17 15:44:24,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701207039] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:24,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273561749] [2025-03-17 15:44:24,078 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:24,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:24,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:24,080 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:24,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 15:44:24,101 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 45 statements into 1 equivalence classes. [2025-03-17 15:44:24,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 45 of 45 statements. [2025-03-17 15:44:24,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:24,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:24,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 15:44:24,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:24,189 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-17 15:44:24,190 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-17 15:44:24,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273561749] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:24,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:24,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-03-17 15:44:24,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528474541] [2025-03-17 15:44:24,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:24,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 15:44:24,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:24,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 15:44:24,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:44:24,381 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-17 15:44:24,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:24,512 INFO L93 Difference]: Finished difference Result 140 states and 216 transitions. [2025-03-17 15:44:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 15:44:24,512 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) Word has length 45 [2025-03-17 15:44:24,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:24,514 INFO L225 Difference]: With dead ends: 140 [2025-03-17 15:44:24,514 INFO L226 Difference]: Without dead ends: 138 [2025-03-17 15:44:24,515 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-03-17 15:44:24,515 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:24,515 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 128 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-03-17 15:44:24,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2025-03-17 15:44:24,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 11 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (66), 20 states have call predecessors, (66), 10 states have call successors, (66) [2025-03-17 15:44:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 158 transitions. [2025-03-17 15:44:24,529 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 158 transitions. Word has length 45 [2025-03-17 15:44:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:24,529 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 158 transitions. [2025-03-17 15:44:24,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-17 15:44:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 158 transitions. [2025-03-17 15:44:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2025-03-17 15:44:24,531 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:24,531 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] [2025-03-17 15:44:24,538 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 15:44:24,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:24,737 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:24,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:24,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764432, now seen corresponding path program 1 times [2025-03-17 15:44:24,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:24,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784488468] [2025-03-17 15:44:24,738 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:24,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:24,742 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-03-17 15:44:24,751 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-03-17 15:44:24,752 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:24,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 38 proven. 80 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2025-03-17 15:44:24,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:24,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784488468] [2025-03-17 15:44:24,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784488468] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:24,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513413139] [2025-03-17 15:44:24,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:44:24,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:24,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:24,890 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:24,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 15:44:24,916 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 81 statements into 1 equivalence classes. [2025-03-17 15:44:24,935 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 81 of 81 statements. [2025-03-17 15:44:24,935 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:24,935 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:24,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 15:44:24,937 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:25,014 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 50 proven. 84 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-03-17 15:44:25,015 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 50 proven. 87 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2025-03-17 15:44:25,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513413139] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:25,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:25,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 16 [2025-03-17 15:44:25,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606712102] [2025-03-17 15:44:25,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:25,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 15:44:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:25,298 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 15:44:25,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:44:25,299 INFO L87 Difference]: Start difference. First operand 97 states and 158 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 10 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2025-03-17 15:44:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:25,447 INFO L93 Difference]: Finished difference Result 173 states and 298 transitions. [2025-03-17 15:44:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 15:44:25,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 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 81 [2025-03-17 15:44:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:25,449 INFO L225 Difference]: With dead ends: 173 [2025-03-17 15:44:25,449 INFO L226 Difference]: Without dead ends: 79 [2025-03-17 15:44:25,450 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 155 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2025-03-17 15:44:25,451 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:25,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 65 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-17 15:44:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2025-03-17 15:44:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 52 states have internal predecessors, (60), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (26), 12 states have call predecessors, (26), 6 states have call successors, (26) [2025-03-17 15:44:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2025-03-17 15:44:25,467 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 81 [2025-03-17 15:44:25,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:25,467 INFO L471 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2025-03-17 15:44:25,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 10 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2025-03-17 15:44:25,467 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2025-03-17 15:44:25,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2025-03-17 15:44:25,473 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:25,473 INFO L218 NwaCegarLoop]: trace histogram [18, 15, 14, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 4, 1, 1, 1, 1] [2025-03-17 15:44:25,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-17 15:44:25,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:25,677 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:25,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:25,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1208382002, now seen corresponding path program 2 times [2025-03-17 15:44:25,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:25,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441272977] [2025-03-17 15:44:25,678 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:44:25,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:25,683 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 162 statements into 2 equivalence classes. [2025-03-17 15:44:25,694 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 162 of 162 statements. [2025-03-17 15:44:25,695 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:44:25,695 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 114 proven. 350 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2025-03-17 15:44:25,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:25,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441272977] [2025-03-17 15:44:25,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441272977] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:25,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857431098] [2025-03-17 15:44:25,916 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:44:25,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:25,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:25,918 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:25,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 15:44:25,946 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 162 statements into 2 equivalence classes. [2025-03-17 15:44:25,976 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 162 of 162 statements. [2025-03-17 15:44:25,976 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:44:25,976 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:25,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 15:44:25,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:26,100 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 507 proven. 183 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2025-03-17 15:44:26,101 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 135 proven. 404 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2025-03-17 15:44:26,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857431098] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:26,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:26,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14] total 19 [2025-03-17 15:44:26,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492734394] [2025-03-17 15:44:26,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:26,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 15:44:26,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:26,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 15:44:26,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-03-17 15:44:26,526 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2025-03-17 15:44:26,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:26,748 INFO L93 Difference]: Finished difference Result 172 states and 253 transitions. [2025-03-17 15:44:26,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 15:44:26,750 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) Word has length 162 [2025-03-17 15:44:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:26,751 INFO L225 Difference]: With dead ends: 172 [2025-03-17 15:44:26,751 INFO L226 Difference]: Without dead ends: 106 [2025-03-17 15:44:26,752 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 315 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2025-03-17 15:44:26,752 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 152 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:26,752 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 82 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:26,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2025-03-17 15:44:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2025-03-17 15:44:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 72 states have internal predecessors, (83), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (36), 15 states have call predecessors, (36), 9 states have call successors, (36) [2025-03-17 15:44:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 129 transitions. [2025-03-17 15:44:26,769 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 129 transitions. Word has length 162 [2025-03-17 15:44:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:26,769 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 129 transitions. [2025-03-17 15:44:26,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.842105263157895) internal successors, (111), 19 states have internal predecessors, (111), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2025-03-17 15:44:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 129 transitions. [2025-03-17 15:44:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2025-03-17 15:44:26,770 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:26,770 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1] [2025-03-17 15:44:26,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-03-17 15:44:26,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:26,971 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:26,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1966959960, now seen corresponding path program 3 times [2025-03-17 15:44:26,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:26,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269144330] [2025-03-17 15:44:26,971 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:44:26,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:26,975 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 89 statements into 8 equivalence classes. [2025-03-17 15:44:26,981 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 50 of 89 statements. [2025-03-17 15:44:26,982 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-17 15:44:26,982 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:27,093 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 58 proven. 8 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2025-03-17 15:44:27,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269144330] [2025-03-17 15:44:27,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269144330] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:27,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947061705] [2025-03-17 15:44:27,094 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:44:27,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:27,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:27,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:27,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 15:44:27,122 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 89 statements into 8 equivalence classes. [2025-03-17 15:44:27,135 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 50 of 89 statements. [2025-03-17 15:44:27,136 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-17 15:44:27,136 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:27,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 15:44:27,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:27,199 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2025-03-17 15:44:27,199 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2025-03-17 15:44:27,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947061705] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:27,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:27,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2025-03-17 15:44:27,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342644659] [2025-03-17 15:44:27,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:27,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 15:44:27,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:27,344 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 15:44:27,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:44:27,345 INFO L87 Difference]: Start difference. First operand 94 states and 129 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-17 15:44:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:27,404 INFO L93 Difference]: Finished difference Result 100 states and 136 transitions. [2025-03-17 15:44:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 15:44:27,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 89 [2025-03-17 15:44:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:27,405 INFO L225 Difference]: With dead ends: 100 [2025-03-17 15:44:27,405 INFO L226 Difference]: Without dead ends: 99 [2025-03-17 15:44:27,405 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 166 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2025-03-17 15:44:27,406 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:27,406 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 130 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:44:27,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-17 15:44:27,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2025-03-17 15:44:27,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 71 states have internal predecessors, (81), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (36), 15 states have call predecessors, (36), 9 states have call successors, (36) [2025-03-17 15:44:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 127 transitions. [2025-03-17 15:44:27,420 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 127 transitions. Word has length 89 [2025-03-17 15:44:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:27,420 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 127 transitions. [2025-03-17 15:44:27,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 16 states have internal predecessors, (51), 5 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2025-03-17 15:44:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 127 transitions. [2025-03-17 15:44:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-03-17 15:44:27,422 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:27,422 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1] [2025-03-17 15:44:27,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 15:44:27,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:27,623 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:27,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1436494389, now seen corresponding path program 2 times [2025-03-17 15:44:27,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:27,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710550749] [2025-03-17 15:44:27,624 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:44:27,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:27,628 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 90 statements into 2 equivalence classes. [2025-03-17 15:44:27,636 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 90 of 90 statements. [2025-03-17 15:44:27,636 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:44:27,636 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2025-03-17 15:44:27,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:27,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710550749] [2025-03-17 15:44:27,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710550749] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:44:27,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:44:27,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 15:44:27,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533280336] [2025-03-17 15:44:27,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:44:27,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:44:27,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:27,686 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:44:27,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:44:27,686 INFO L87 Difference]: Start difference. First operand 93 states and 127 transitions. Second operand has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-17 15:44:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:27,701 INFO L93 Difference]: Finished difference Result 100 states and 134 transitions. [2025-03-17 15:44:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:44:27,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 90 [2025-03-17 15:44:27,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:27,703 INFO L225 Difference]: With dead ends: 100 [2025-03-17 15:44:27,703 INFO L226 Difference]: Without dead ends: 99 [2025-03-17 15:44:27,703 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:44:27,703 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:27,703 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:44:27,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2025-03-17 15:44:27,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2025-03-17 15:44:27,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 71 states have internal predecessors, (81), 10 states have call successors, (10), 6 states have call predecessors, (10), 8 states have return successors, (36), 15 states have call predecessors, (36), 9 states have call successors, (36) [2025-03-17 15:44:27,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 127 transitions. [2025-03-17 15:44:27,710 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 127 transitions. Word has length 90 [2025-03-17 15:44:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:27,710 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 127 transitions. [2025-03-17 15:44:27,711 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2025-03-17 15:44:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 127 transitions. [2025-03-17 15:44:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2025-03-17 15:44:27,711 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:27,711 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2025-03-17 15:44:27,711 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 15:44:27,712 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:27,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:27,712 INFO L85 PathProgramCache]: Analyzing trace with hash 2044198184, now seen corresponding path program 3 times [2025-03-17 15:44:27,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:27,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129743843] [2025-03-17 15:44:27,712 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:44:27,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:27,715 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 85 statements into 7 equivalence classes. [2025-03-17 15:44:27,721 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 79 of 85 statements. [2025-03-17 15:44:27,721 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 15:44:27,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 89 proven. 48 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2025-03-17 15:44:27,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:27,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129743843] [2025-03-17 15:44:27,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129743843] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:27,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710098690] [2025-03-17 15:44:27,812 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:44:27,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:27,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:27,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:27,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 15:44:27,852 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 85 statements into 7 equivalence classes. [2025-03-17 15:44:27,867 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 79 of 85 statements. [2025-03-17 15:44:27,867 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 15:44:27,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:27,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 15:44:27,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 130 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2025-03-17 15:44:27,908 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 95 proven. 36 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2025-03-17 15:44:28,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710098690] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:28,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:28,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 15 [2025-03-17 15:44:28,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134428735] [2025-03-17 15:44:28,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:28,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 15:44:28,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:28,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 15:44:28,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2025-03-17 15:44:28,132 INFO L87 Difference]: Start difference. First operand 93 states and 127 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 7 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-17 15:44:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:28,238 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2025-03-17 15:44:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 15:44:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 7 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 85 [2025-03-17 15:44:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:28,239 INFO L225 Difference]: With dead ends: 156 [2025-03-17 15:44:28,239 INFO L226 Difference]: Without dead ends: 66 [2025-03-17 15:44:28,240 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 163 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2025-03-17 15:44:28,241 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 37 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:28,241 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 78 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:28,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-17 15:44:28,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2025-03-17 15:44:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 49 states have internal predecessors, (54), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-17 15:44:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2025-03-17 15:44:28,246 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 85 [2025-03-17 15:44:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:28,246 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2025-03-17 15:44:28,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 7 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2025-03-17 15:44:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2025-03-17 15:44:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2025-03-17 15:44:28,247 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:28,247 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1] [2025-03-17 15:44:28,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 15:44:28,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-17 15:44:28,447 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:28,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:28,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1085743344, now seen corresponding path program 4 times [2025-03-17 15:44:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:28,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051212678] [2025-03-17 15:44:28,448 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:44:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:28,452 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 123 statements into 2 equivalence classes. [2025-03-17 15:44:28,457 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 73 of 123 statements. [2025-03-17 15:44:28,457 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:44:28,457 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 147 proven. 168 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-03-17 15:44:28,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:28,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051212678] [2025-03-17 15:44:28,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051212678] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:28,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200675707] [2025-03-17 15:44:28,558 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:44:28,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:28,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:28,560 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:28,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 15:44:28,590 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 123 statements into 2 equivalence classes. [2025-03-17 15:44:28,602 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 73 of 123 statements. [2025-03-17 15:44:28,602 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:44:28,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:28,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 15:44:28,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 143 proven. 182 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2025-03-17 15:44:28,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 143 proven. 202 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-17 15:44:29,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200675707] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:29,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:29,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2025-03-17 15:44:29,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846973395] [2025-03-17 15:44:29,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:29,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-17 15:44:29,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:29,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-17 15:44:29,215 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2025-03-17 15:44:29,215 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 13 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (18), 8 states have call predecessors, (18), 13 states have call successors, (18) [2025-03-17 15:44:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:29,386 INFO L93 Difference]: Finished difference Result 131 states and 156 transitions. [2025-03-17 15:44:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 15:44:29,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 13 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (18), 8 states have call predecessors, (18), 13 states have call successors, (18) Word has length 123 [2025-03-17 15:44:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:29,387 INFO L225 Difference]: With dead ends: 131 [2025-03-17 15:44:29,387 INFO L226 Difference]: Without dead ends: 72 [2025-03-17 15:44:29,387 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 235 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2025-03-17 15:44:29,388 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 56 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:29,388 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 119 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:29,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-03-17 15:44:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2025-03-17 15:44:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 54 states have internal predecessors, (59), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2025-03-17 15:44:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2025-03-17 15:44:29,392 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 123 [2025-03-17 15:44:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:29,392 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2025-03-17 15:44:29,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.9) internal successors, (98), 20 states have internal predecessors, (98), 13 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (18), 8 states have call predecessors, (18), 13 states have call successors, (18) [2025-03-17 15:44:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2025-03-17 15:44:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2025-03-17 15:44:29,393 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:29,394 INFO L218 NwaCegarLoop]: trace histogram [26, 23, 21, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 10, 8, 5, 1, 1, 1, 1] [2025-03-17 15:44:29,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 15:44:29,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 15:44:29,594 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:29,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1393265124, now seen corresponding path program 5 times [2025-03-17 15:44:29,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:29,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021670127] [2025-03-17 15:44:29,595 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:44:29,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:29,604 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 242 statements into 21 equivalence classes. [2025-03-17 15:44:29,614 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 105 of 242 statements. [2025-03-17 15:44:29,615 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-17 15:44:29,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 334 proven. 596 refuted. 0 times theorem prover too weak. 1099 trivial. 0 not checked. [2025-03-17 15:44:29,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:29,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021670127] [2025-03-17 15:44:29,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021670127] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:29,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589323574] [2025-03-17 15:44:29,793 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:44:29,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:29,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:29,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:29,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 15:44:29,834 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 242 statements into 21 equivalence classes. [2025-03-17 15:44:29,852 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) and asserted 105 of 242 statements. [2025-03-17 15:44:29,852 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2025-03-17 15:44:29,852 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:29,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-17 15:44:29,856 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 972 proven. 384 refuted. 0 times theorem prover too weak. 673 trivial. 0 not checked. [2025-03-17 15:44:29,951 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 333 proven. 606 refuted. 0 times theorem prover too weak. 1090 trivial. 0 not checked. [2025-03-17 15:44:30,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589323574] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:30,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:30,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 15] total 21 [2025-03-17 15:44:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110211159] [2025-03-17 15:44:30,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:30,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-17 15:44:30,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:30,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-17 15:44:30,462 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-03-17 15:44:30,463 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 12 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 9 states have call predecessors, (19), 11 states have call successors, (19) [2025-03-17 15:44:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:30,662 INFO L93 Difference]: Finished difference Result 169 states and 206 transitions. [2025-03-17 15:44:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 15:44:30,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 12 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 9 states have call predecessors, (19), 11 states have call successors, (19) Word has length 242 [2025-03-17 15:44:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:30,664 INFO L225 Difference]: With dead ends: 169 [2025-03-17 15:44:30,664 INFO L226 Difference]: Without dead ends: 104 [2025-03-17 15:44:30,664 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 474 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2025-03-17 15:44:30,665 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 143 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:30,665 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 85 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:30,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2025-03-17 15:44:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2025-03-17 15:44:30,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 71 states have internal predecessors, (77), 11 states have call successors, (11), 10 states have call predecessors, (11), 6 states have return successors, (19), 9 states have call predecessors, (19), 10 states have call successors, (19) [2025-03-17 15:44:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2025-03-17 15:44:30,672 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 242 [2025-03-17 15:44:30,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:30,673 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2025-03-17 15:44:30,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 21 states have internal predecessors, (111), 12 states have call successors, (19), 3 states have call predecessors, (19), 7 states have return successors, (19), 9 states have call predecessors, (19), 11 states have call successors, (19) [2025-03-17 15:44:30,673 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2025-03-17 15:44:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2025-03-17 15:44:30,674 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:30,674 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 1, 1, 1, 1] [2025-03-17 15:44:30,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 15:44:30,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 15:44:30,878 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:30,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:30,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1685102462, now seen corresponding path program 6 times [2025-03-17 15:44:30,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:30,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725774246] [2025-03-17 15:44:30,879 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:44:30,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:30,885 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 143 statements into 12 equivalence classes. [2025-03-17 15:44:30,902 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 143 of 143 statements. [2025-03-17 15:44:30,902 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-17 15:44:30,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 106 proven. 169 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2025-03-17 15:44:31,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725774246] [2025-03-17 15:44:31,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725774246] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104199791] [2025-03-17 15:44:31,184 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:44:31,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:31,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:31,187 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:31,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 15:44:31,223 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 143 statements into 12 equivalence classes. [2025-03-17 15:44:31,249 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) and asserted 143 of 143 statements. [2025-03-17 15:44:31,249 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2025-03-17 15:44:31,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:31,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 15:44:31,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2025-03-17 15:44:31,403 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2025-03-17 15:44:32,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104199791] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:32,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:32,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 17] total 32 [2025-03-17 15:44:32,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310879525] [2025-03-17 15:44:32,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:32,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-03-17 15:44:32,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:32,217 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-03-17 15:44:32,218 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=803, Unknown=0, NotChecked=0, Total=1056 [2025-03-17 15:44:32,218 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 33 states, 32 states have (on average 2.71875) internal successors, (87), 33 states have internal predecessors, (87), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (22), 22 states have call predecessors, (22), 8 states have call successors, (22) [2025-03-17 15:44:32,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:32,347 INFO L93 Difference]: Finished difference Result 122 states and 157 transitions. [2025-03-17 15:44:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-17 15:44:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 33 states have internal predecessors, (87), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (22), 22 states have call predecessors, (22), 8 states have call successors, (22) Word has length 143 [2025-03-17 15:44:32,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:32,348 INFO L225 Difference]: With dead ends: 122 [2025-03-17 15:44:32,348 INFO L226 Difference]: Without dead ends: 121 [2025-03-17 15:44:32,349 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 269 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=1015, Unknown=0, NotChecked=0, Total=1332 [2025-03-17 15:44:32,349 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:32,349 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 153 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:32,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2025-03-17 15:44:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2025-03-17 15:44:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 87 states have internal predecessors, (94), 13 states have call successors, (13), 10 states have call predecessors, (13), 8 states have return successors, (35), 14 states have call predecessors, (35), 12 states have call successors, (35) [2025-03-17 15:44:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 142 transitions. [2025-03-17 15:44:32,358 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 142 transitions. Word has length 143 [2025-03-17 15:44:32,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:32,359 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 142 transitions. [2025-03-17 15:44:32,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 33 states have internal predecessors, (87), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (22), 22 states have call predecessors, (22), 8 states have call successors, (22) [2025-03-17 15:44:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 142 transitions. [2025-03-17 15:44:32,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2025-03-17 15:44:32,364 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:32,364 INFO L218 NwaCegarLoop]: trace histogram [48, 45, 39, 24, 24, 24, 24, 23, 23, 23, 23, 23, 22, 22, 22, 21, 15, 9, 1, 1, 1, 1] [2025-03-17 15:44:32,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 15:44:32,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 15:44:32,565 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:32,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1789488064, now seen corresponding path program 7 times [2025-03-17 15:44:32,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:32,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685366177] [2025-03-17 15:44:32,566 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:44:32,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:32,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 458 statements into 1 equivalence classes. [2025-03-17 15:44:32,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 458 of 458 statements. [2025-03-17 15:44:32,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:32,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7510 backedges. 596 proven. 2001 refuted. 0 times theorem prover too weak. 4913 trivial. 0 not checked. [2025-03-17 15:44:33,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:33,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685366177] [2025-03-17 15:44:33,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685366177] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:33,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519997381] [2025-03-17 15:44:33,019 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:44:33,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:33,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:33,021 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:33,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 15:44:33,088 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 458 statements into 1 equivalence classes. [2025-03-17 15:44:33,150 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 458 of 458 statements. [2025-03-17 15:44:33,150 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:33,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:33,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-17 15:44:33,158 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:33,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7510 backedges. 3970 proven. 1245 refuted. 0 times theorem prover too weak. 2295 trivial. 0 not checked. [2025-03-17 15:44:33,295 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7510 backedges. 706 proven. 2493 refuted. 0 times theorem prover too weak. 4311 trivial. 0 not checked. [2025-03-17 15:44:34,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519997381] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:34,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:34,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 22] total 27 [2025-03-17 15:44:34,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751560620] [2025-03-17 15:44:34,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:34,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 15:44:34,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:34,402 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 15:44:34,402 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2025-03-17 15:44:34,403 INFO L87 Difference]: Start difference. First operand 112 states and 142 transitions. Second operand has 27 states, 27 states have (on average 6.0) internal successors, (162), 27 states have internal predecessors, (162), 22 states have call successors, (29), 3 states have call predecessors, (29), 11 states have return successors, (34), 13 states have call predecessors, (34), 21 states have call successors, (34) [2025-03-17 15:44:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:34,739 INFO L93 Difference]: Finished difference Result 259 states and 352 transitions. [2025-03-17 15:44:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-17 15:44:34,740 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.0) internal successors, (162), 27 states have internal predecessors, (162), 22 states have call successors, (29), 3 states have call predecessors, (29), 11 states have return successors, (34), 13 states have call predecessors, (34), 21 states have call successors, (34) Word has length 458 [2025-03-17 15:44:34,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:34,741 INFO L225 Difference]: With dead ends: 259 [2025-03-17 15:44:34,742 INFO L226 Difference]: Without dead ends: 152 [2025-03-17 15:44:34,743 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 901 SyntacticMatches, 12 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=589, Invalid=1667, Unknown=0, NotChecked=0, Total=2256 [2025-03-17 15:44:34,743 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 297 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:34,744 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 118 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:34,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2025-03-17 15:44:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 130. [2025-03-17 15:44:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 101 states have internal predecessors, (110), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (37), 17 states have call predecessors, (37), 14 states have call successors, (37) [2025-03-17 15:44:34,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 162 transitions. [2025-03-17 15:44:34,752 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 162 transitions. Word has length 458 [2025-03-17 15:44:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:34,753 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 162 transitions. [2025-03-17 15:44:34,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.0) internal successors, (162), 27 states have internal predecessors, (162), 22 states have call successors, (29), 3 states have call predecessors, (29), 11 states have return successors, (34), 13 states have call predecessors, (34), 21 states have call successors, (34) [2025-03-17 15:44:34,753 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2025-03-17 15:44:34,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2025-03-17 15:44:34,755 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:34,755 INFO L218 NwaCegarLoop]: trace histogram [32, 30, 26, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 6, 1, 1, 1, 1] [2025-03-17 15:44:34,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 15:44:34,955 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 15:44:34,956 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:34,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1551605713, now seen corresponding path program 8 times [2025-03-17 15:44:34,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:34,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279901324] [2025-03-17 15:44:34,956 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:44:34,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:34,964 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 306 statements into 2 equivalence classes. [2025-03-17 15:44:34,980 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 306 of 306 statements. [2025-03-17 15:44:34,980 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:44:34,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 554 proven. 990 refuted. 0 times theorem prover too weak. 1738 trivial. 0 not checked. [2025-03-17 15:44:35,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279901324] [2025-03-17 15:44:35,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279901324] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:35,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773901329] [2025-03-17 15:44:35,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:44:35,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:35,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:35,248 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:35,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 15:44:35,305 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 306 statements into 2 equivalence classes. [2025-03-17 15:44:35,348 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 306 of 306 statements. [2025-03-17 15:44:35,348 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:44:35,348 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:35,354 INFO L256 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 15:44:35,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 1858 proven. 484 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2025-03-17 15:44:35,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 551 proven. 1101 refuted. 0 times theorem prover too weak. 1630 trivial. 0 not checked. [2025-03-17 15:44:36,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773901329] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:36,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:36,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-03-17 15:44:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950743274] [2025-03-17 15:44:36,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:36,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 15:44:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:36,500 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 15:44:36,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2025-03-17 15:44:36,500 INFO L87 Difference]: Start difference. First operand 130 states and 162 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), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) [2025-03-17 15:44:36,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:36,713 INFO L93 Difference]: Finished difference Result 243 states and 316 transitions. [2025-03-17 15:44:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 15:44:36,714 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), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) Word has length 306 [2025-03-17 15:44:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:36,715 INFO L225 Difference]: With dead ends: 243 [2025-03-17 15:44:36,715 INFO L226 Difference]: Without dead ends: 118 [2025-03-17 15:44:36,716 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 599 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2025-03-17 15:44:36,716 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 104 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:36,716 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 161 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-03-17 15:44:36,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2025-03-17 15:44:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 85 states have (on average 1.035294117647059) internal successors, (88), 83 states have internal predecessors, (88), 13 states have call successors, (13), 10 states have call predecessors, (13), 7 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2025-03-17 15:44:36,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2025-03-17 15:44:36,722 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 306 [2025-03-17 15:44:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:36,722 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2025-03-17 15:44:36,722 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), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) [2025-03-17 15:44:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2025-03-17 15:44:36,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2025-03-17 15:44:36,725 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:36,726 INFO L218 NwaCegarLoop]: trace histogram [80, 75, 65, 41, 41, 41, 41, 38, 38, 38, 38, 38, 37, 37, 37, 36, 24, 15, 1, 1, 1, 1] [2025-03-17 15:44:36,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 15:44:36,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 15:44:36,926 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:36,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1672740584, now seen corresponding path program 9 times [2025-03-17 15:44:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:36,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406752811] [2025-03-17 15:44:36,927 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:44:36,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:36,949 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 764 statements into 60 equivalence classes. [2025-03-17 15:44:37,018 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) and asserted 502 of 764 statements. [2025-03-17 15:44:37,018 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2025-03-17 15:44:37,018 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:39,339 INFO L134 CoverageAnalysis]: Checked inductivity of 21220 backedges. 6070 proven. 2318 refuted. 0 times theorem prover too weak. 12832 trivial. 0 not checked. [2025-03-17 15:44:39,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:39,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406752811] [2025-03-17 15:44:39,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406752811] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:39,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013802166] [2025-03-17 15:44:39,339 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:44:39,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:39,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:39,341 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:39,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 15:44:39,421 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 764 statements into 60 equivalence classes. [2025-03-17 15:44:39,512 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) and asserted 502 of 764 statements. [2025-03-17 15:44:39,512 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2025-03-17 15:44:39,512 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:39,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 101 conjuncts are in the unsatisfiable core [2025-03-17 15:44:39,524 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 21220 backedges. 6012 proven. 1736 refuted. 0 times theorem prover too weak. 13472 trivial. 0 not checked. [2025-03-17 15:44:39,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 21220 backedges. 6479 proven. 1574 refuted. 0 times theorem prover too weak. 13167 trivial. 0 not checked. [2025-03-17 15:44:46,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013802166] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:46,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:46,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 32] total 46 [2025-03-17 15:44:46,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402443738] [2025-03-17 15:44:46,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:46,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2025-03-17 15:44:46,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:46,766 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2025-03-17 15:44:46,766 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=1667, Unknown=0, NotChecked=0, Total=2162 [2025-03-17 15:44:46,766 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 47 states have internal predecessors, (130), 12 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) [2025-03-17 15:44:47,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:47,012 INFO L93 Difference]: Finished difference Result 167 states and 239 transitions. [2025-03-17 15:44:47,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-17 15:44:47,015 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 47 states have internal predecessors, (130), 12 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) Word has length 764 [2025-03-17 15:44:47,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:47,018 INFO L225 Difference]: With dead ends: 167 [2025-03-17 15:44:47,018 INFO L226 Difference]: Without dead ends: 166 [2025-03-17 15:44:47,021 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1635 GetRequests, 1514 SyntacticMatches, 68 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=663, Invalid=2307, Unknown=0, NotChecked=0, Total=2970 [2025-03-17 15:44:47,021 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:47,021 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 195 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2025-03-17 15:44:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 142. [2025-03-17 15:44:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 111 states have internal predecessors, (116), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (70), 20 states have call predecessors, (70), 16 states have call successors, (70) [2025-03-17 15:44:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 203 transitions. [2025-03-17 15:44:47,032 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 203 transitions. Word has length 764 [2025-03-17 15:44:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:47,033 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 203 transitions. [2025-03-17 15:44:47,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 47 states have internal predecessors, (130), 12 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) [2025-03-17 15:44:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 203 transitions. [2025-03-17 15:44:47,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1269 [2025-03-17 15:44:47,040 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:47,040 INFO L218 NwaCegarLoop]: trace histogram [131, 127, 106, 66, 66, 66, 66, 64, 64, 64, 64, 64, 63, 63, 63, 62, 40, 25, 1, 1, 1, 1] [2025-03-17 15:44:47,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-17 15:44:47,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:47,241 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:47,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash 859896332, now seen corresponding path program 10 times [2025-03-17 15:44:47,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:47,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199496527] [2025-03-17 15:44:47,242 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:44:47,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:47,261 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1268 statements into 2 equivalence classes. [2025-03-17 15:44:47,309 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 753 of 1268 statements. [2025-03-17 15:44:47,309 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:44:47,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 58955 backedges. 1257 proven. 8337 refuted. 0 times theorem prover too weak. 49361 trivial. 0 not checked. [2025-03-17 15:44:47,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:47,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199496527] [2025-03-17 15:44:47,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199496527] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:47,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733194605] [2025-03-17 15:44:47,937 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:44:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:47,938 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:47,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 15:44:48,117 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 1268 statements into 2 equivalence classes. [2025-03-17 15:44:48,250 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 753 of 1268 statements. [2025-03-17 15:44:48,250 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:44:48,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:48,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 1576 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 15:44:48,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 58955 backedges. 29860 proven. 2740 refuted. 0 times theorem prover too weak. 26355 trivial. 0 not checked. [2025-03-17 15:44:48,432 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:50,497 INFO L134 CoverageAnalysis]: Checked inductivity of 58955 backedges. 1502 proven. 10132 refuted. 0 times theorem prover too weak. 47321 trivial. 0 not checked. [2025-03-17 15:44:50,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733194605] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:50,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:50,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 25] total 30 [2025-03-17 15:44:50,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513615809] [2025-03-17 15:44:50,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:50,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-17 15:44:50,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:50,499 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-17 15:44:50,500 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2025-03-17 15:44:50,500 INFO L87 Difference]: Start difference. First operand 142 states and 203 transitions. Second operand has 30 states, 30 states have (on average 5.966666666666667) internal successors, (179), 30 states have internal predecessors, (179), 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) [2025-03-17 15:44:50,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:50,916 INFO L93 Difference]: Finished difference Result 352 states and 577 transitions. [2025-03-17 15:44:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-17 15:44:50,916 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.966666666666667) internal successors, (179), 30 states have internal predecessors, (179), 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 1268 [2025-03-17 15:44:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:50,918 INFO L225 Difference]: With dead ends: 352 [2025-03-17 15:44:50,918 INFO L226 Difference]: Without dead ends: 215 [2025-03-17 15:44:50,920 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2588 GetRequests, 2519 SyntacticMatches, 15 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=2284, Unknown=0, NotChecked=0, Total=3080 [2025-03-17 15:44:50,921 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 484 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:50,921 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 145 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:44:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2025-03-17 15:44:50,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 193. [2025-03-17 15:44:50,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 155 states have (on average 1.032258064516129) internal successors, (160), 151 states have internal predecessors, (160), 23 states have call successors, (23), 14 states have call predecessors, (23), 14 states have return successors, (90), 27 states have call predecessors, (90), 22 states have call successors, (90) [2025-03-17 15:44:50,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 273 transitions. [2025-03-17 15:44:50,932 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 273 transitions. Word has length 1268 [2025-03-17 15:44:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:50,933 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 273 transitions. [2025-03-17 15:44:50,933 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.966666666666667) internal successors, (179), 30 states have internal predecessors, (179), 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) [2025-03-17 15:44:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 273 transitions. [2025-03-17 15:44:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 817 [2025-03-17 15:44:50,938 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:50,938 INFO L218 NwaCegarLoop]: trace histogram [84, 82, 68, 42, 42, 42, 42, 41, 41, 41, 41, 41, 41, 41, 41, 40, 26, 16, 1, 1, 1, 1] [2025-03-17 15:44:50,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-17 15:44:51,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:51,142 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:51,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash -914720939, now seen corresponding path program 11 times [2025-03-17 15:44:51,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:51,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091306051] [2025-03-17 15:44:51,143 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:44:51,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:51,155 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 816 statements into 60 equivalence classes. [2025-03-17 15:44:51,203 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) and asserted 663 of 816 statements. [2025-03-17 15:44:51,204 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2025-03-17 15:44:51,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24215 backedges. 3608 proven. 3539 refuted. 0 times theorem prover too weak. 17068 trivial. 0 not checked. [2025-03-17 15:44:51,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:51,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091306051] [2025-03-17 15:44:51,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091306051] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:51,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061882304] [2025-03-17 15:44:51,746 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:44:51,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:51,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:51,748 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:51,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 15:44:51,912 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 816 statements into 60 equivalence classes. [2025-03-17 15:44:52,023 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) and asserted 663 of 816 statements. [2025-03-17 15:44:52,024 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2025-03-17 15:44:52,024 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:52,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 1226 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 15:44:52,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24215 backedges. 3608 proven. 3539 refuted. 0 times theorem prover too weak. 17068 trivial. 0 not checked. [2025-03-17 15:44:52,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 24215 backedges. 3616 proven. 3654 refuted. 0 times theorem prover too weak. 16945 trivial. 0 not checked. [2025-03-17 15:44:54,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061882304] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:54,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:54,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 27] total 29 [2025-03-17 15:44:54,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68579424] [2025-03-17 15:44:54,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:54,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 15:44:54,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:54,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 15:44:54,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2025-03-17 15:44:54,181 INFO L87 Difference]: Start difference. First operand 193 states and 273 transitions. Second operand has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 29 states have internal predecessors, (165), 22 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (35), 16 states have call predecessors, (35), 22 states have call successors, (35) [2025-03-17 15:44:54,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:54,753 INFO L93 Difference]: Finished difference Result 438 states and 697 transitions. [2025-03-17 15:44:54,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-17 15:44:54,753 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 29 states have internal predecessors, (165), 22 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (35), 16 states have call predecessors, (35), 22 states have call successors, (35) Word has length 816 [2025-03-17 15:44:54,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:54,756 INFO L225 Difference]: With dead ends: 438 [2025-03-17 15:44:54,756 INFO L226 Difference]: Without dead ends: 225 [2025-03-17 15:44:54,758 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1620 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1079, Invalid=3211, Unknown=0, NotChecked=0, Total=4290 [2025-03-17 15:44:54,759 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 369 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:54,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 211 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 15:44:54,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2025-03-17 15:44:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 184. [2025-03-17 15:44:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 145 states have internal predecessors, (154), 23 states have call successors, (23), 17 states have call predecessors, (23), 11 states have return successors, (64), 21 states have call predecessors, (64), 22 states have call successors, (64) [2025-03-17 15:44:54,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 241 transitions. [2025-03-17 15:44:54,769 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 241 transitions. Word has length 816 [2025-03-17 15:44:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:54,769 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 241 transitions. [2025-03-17 15:44:54,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.689655172413793) internal successors, (165), 29 states have internal predecessors, (165), 22 states have call successors, (27), 1 states have call predecessors, (27), 13 states have return successors, (35), 16 states have call predecessors, (35), 22 states have call successors, (35) [2025-03-17 15:44:54,770 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 241 transitions. [2025-03-17 15:44:54,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 876 [2025-03-17 15:44:54,774 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:54,774 INFO L218 NwaCegarLoop]: trace histogram [90, 88, 73, 45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 44, 43, 28, 17, 1, 1, 1, 1] [2025-03-17 15:44:54,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-17 15:44:54,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:54,975 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:54,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1350347224, now seen corresponding path program 12 times [2025-03-17 15:44:54,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:54,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546357711] [2025-03-17 15:44:54,976 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:44:54,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:54,992 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 875 statements into 65 equivalence classes. [2025-03-17 15:44:55,044 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) and asserted 692 of 875 statements. [2025-03-17 15:44:55,044 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2025-03-17 15:44:55,044 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:55,561 INFO L134 CoverageAnalysis]: Checked inductivity of 27886 backedges. 3658 proven. 3197 refuted. 0 times theorem prover too weak. 21031 trivial. 0 not checked. [2025-03-17 15:44:55,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:55,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546357711] [2025-03-17 15:44:55,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546357711] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:55,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194722853] [2025-03-17 15:44:55,562 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:44:55,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:55,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:55,564 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:55,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 15:44:55,740 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 875 statements into 65 equivalence classes. [2025-03-17 15:44:55,864 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) and asserted 692 of 875 statements. [2025-03-17 15:44:55,864 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2025-03-17 15:44:55,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:55,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 1300 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 15:44:55,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 27886 backedges. 3728 proven. 3387 refuted. 0 times theorem prover too weak. 20771 trivial. 0 not checked. [2025-03-17 15:44:56,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 27886 backedges. 3732 proven. 3503 refuted. 0 times theorem prover too weak. 20651 trivial. 0 not checked. [2025-03-17 15:44:58,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194722853] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:58,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:58,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 24] total 31 [2025-03-17 15:44:58,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925300021] [2025-03-17 15:44:58,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:58,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-03-17 15:44:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:58,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-03-17 15:44:58,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2025-03-17 15:44:58,406 INFO L87 Difference]: Start difference. First operand 184 states and 241 transitions. Second operand has 31 states, 31 states have (on average 5.838709677419355) internal successors, (181), 31 states have internal predecessors, (181), 23 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (42), 21 states have call predecessors, (42), 23 states have call successors, (42) [2025-03-17 15:44:58,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:58,869 INFO L93 Difference]: Finished difference Result 408 states and 619 transitions. [2025-03-17 15:44:58,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-17 15:44:58,870 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.838709677419355) internal successors, (181), 31 states have internal predecessors, (181), 23 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (42), 21 states have call predecessors, (42), 23 states have call successors, (42) Word has length 875 [2025-03-17 15:44:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:58,872 INFO L225 Difference]: With dead ends: 408 [2025-03-17 15:44:58,872 INFO L226 Difference]: Without dead ends: 229 [2025-03-17 15:44:58,874 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1793 GetRequests, 1733 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=1898, Unknown=0, NotChecked=0, Total=2550 [2025-03-17 15:44:58,875 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 178 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:58,875 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 390 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 15:44:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2025-03-17 15:44:58,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 193. [2025-03-17 15:44:58,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 154 states have internal predecessors, (160), 26 states have call successors, (26), 21 states have call predecessors, (26), 10 states have return successors, (63), 17 states have call predecessors, (63), 25 states have call successors, (63) [2025-03-17 15:44:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 249 transitions. [2025-03-17 15:44:58,890 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 249 transitions. Word has length 875 [2025-03-17 15:44:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:58,893 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 249 transitions. [2025-03-17 15:44:58,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.838709677419355) internal successors, (181), 31 states have internal predecessors, (181), 23 states have call successors, (31), 1 states have call predecessors, (31), 13 states have return successors, (42), 21 states have call predecessors, (42), 23 states have call successors, (42) [2025-03-17 15:44:58,893 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 249 transitions. [2025-03-17 15:44:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1327 [2025-03-17 15:44:58,901 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:58,902 INFO L218 NwaCegarLoop]: trace histogram [136, 134, 110, 68, 68, 68, 68, 67, 67, 67, 67, 67, 67, 67, 67, 66, 42, 26, 1, 1, 1, 1] [2025-03-17 15:44:58,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-17 15:44:59,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:59,102 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:59,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash -577166197, now seen corresponding path program 13 times [2025-03-17 15:44:59,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:59,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781320098] [2025-03-17 15:44:59,103 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:44:59,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:59,122 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1326 statements into 1 equivalence classes. [2025-03-17 15:44:59,179 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1326 of 1326 statements. [2025-03-17 15:44:59,179 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:59,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:45:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 64488 backedges. 4574 proven. 10243 refuted. 0 times theorem prover too weak. 49671 trivial. 0 not checked. [2025-03-17 15:45:00,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:45:00,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781320098] [2025-03-17 15:45:00,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781320098] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:45:00,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201556793] [2025-03-17 15:45:00,860 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:45:00,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:45:00,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:45:00,862 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:45:00,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 15:45:01,068 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1326 statements into 1 equivalence classes. [2025-03-17 15:45:01,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1326 of 1326 statements. [2025-03-17 15:45:01,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:45:01,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:45:01,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 2470 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-03-17 15:45:01,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:45:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 64488 backedges. 5283 proven. 10902 refuted. 0 times theorem prover too weak. 48303 trivial. 0 not checked. [2025-03-17 15:45:01,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:45:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64488 backedges. 5283 proven. 11133 refuted. 0 times theorem prover too weak. 48072 trivial. 0 not checked. [2025-03-17 15:45:05,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201556793] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:45:05,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:45:05,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 35] total 40 [2025-03-17 15:45:05,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389667345] [2025-03-17 15:45:05,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:45:05,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-03-17 15:45:05,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:45:05,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-03-17 15:45:05,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2025-03-17 15:45:05,279 INFO L87 Difference]: Start difference. First operand 193 states and 249 transitions. Second operand has 40 states, 40 states have (on average 5.525) internal successors, (221), 40 states have internal predecessors, (221), 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) [2025-03-17 15:45:06,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:45:06,018 INFO L93 Difference]: Finished difference Result 426 states and 592 transitions. [2025-03-17 15:45:06,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-03-17 15:45:06,018 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.525) internal successors, (221), 40 states have internal predecessors, (221), 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 1326 [2025-03-17 15:45:06,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:45:06,021 INFO L225 Difference]: With dead ends: 426 [2025-03-17 15:45:06,021 INFO L226 Difference]: Without dead ends: 238 [2025-03-17 15:45:06,023 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2721 GetRequests, 2630 SyntacticMatches, 17 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1360, Invalid=4340, Unknown=0, NotChecked=0, Total=5700 [2025-03-17 15:45:06,024 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 516 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 516 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 15:45:06,025 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [516 Valid, 273 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 15:45:06,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2025-03-17 15:45:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 172. [2025-03-17 15:45:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 137 states have internal predecessors, (141), 23 states have call successors, (23), 17 states have call predecessors, (23), 10 states have return successors, (58), 17 states have call predecessors, (58), 22 states have call successors, (58) [2025-03-17 15:45:06,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 222 transitions. [2025-03-17 15:45:06,040 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 222 transitions. Word has length 1326 [2025-03-17 15:45:06,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:45:06,041 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 222 transitions. [2025-03-17 15:45:06,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.525) internal successors, (221), 40 states have internal predecessors, (221), 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) [2025-03-17 15:45:06,041 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 222 transitions. [2025-03-17 15:45:06,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1066 [2025-03-17 15:45:06,049 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:45:06,049 INFO L218 NwaCegarLoop]: trace histogram [109, 108, 88, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 54, 53, 34, 21, 1, 1, 1, 1] [2025-03-17 15:45:06,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-17 15:45:06,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:45:06,250 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:45:06,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:45:06,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1029407192, now seen corresponding path program 14 times [2025-03-17 15:45:06,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:45:06,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921447798] [2025-03-17 15:45:06,251 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:45:06,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:45:06,267 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1065 statements into 2 equivalence classes. [2025-03-17 15:45:06,316 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1065 of 1065 statements. [2025-03-17 15:45:06,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:45:06,317 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:45:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 41466 backedges. 6794 proven. 10267 refuted. 0 times theorem prover too weak. 24405 trivial. 0 not checked. [2025-03-17 15:45:18,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:45:18,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921447798] [2025-03-17 15:45:18,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921447798] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:45:18,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131128782] [2025-03-17 15:45:18,285 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:45:18,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:45:18,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:45:18,286 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:45:18,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-17 15:45:18,518 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1065 statements into 2 equivalence classes. [2025-03-17 15:45:18,656 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1065 of 1065 statements. [2025-03-17 15:45:18,657 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:45:18,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:45:18,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 1989 conjuncts, 217 conjuncts are in the unsatisfiable core [2025-03-17 15:45:18,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:45:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 41466 backedges. 6686 proven. 7855 refuted. 0 times theorem prover too weak. 26925 trivial. 0 not checked. [2025-03-17 15:45:19,308 INFO L312 TraceCheckSpWp]: Computing backward predicates...