./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Fibonacci04-overflow.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/Fibonacci04-overflow.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 a4783e070fd2491b45504d9f6f3060ee7c5288027d9d113e851641208eae29b1 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 15:43:24,237 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 15:43:24,288 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-03-17 15:43:24,292 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 15:43:24,293 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 15:43:24,305 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 15:43:24,306 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 15:43:24,306 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 15:43:24,306 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 15:43:24,306 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 15:43:24,306 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 15:43:24,306 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 15:43:24,307 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 15:43:24,307 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 15:43:24,307 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 15:43:24,307 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 15:43:24,307 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-17 15:43:24,307 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 15:43:24,307 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 15:43:24,307 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 15:43:24,307 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 15:43:24,308 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 15:43:24,308 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 15:43:24,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 15:43:24,309 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 15:43:24,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 15:43:24,310 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 -> a4783e070fd2491b45504d9f6f3060ee7c5288027d9d113e851641208eae29b1 [2025-03-17 15:43:24,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 15:43:24,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 15:43:24,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 15:43:24,538 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 15:43:24,538 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 15:43:24,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci04-overflow.c [2025-03-17 15:43:25,661 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcfe6e8d6/1113b4712ff2431982676e320e60d0e5/FLAGa5fcd34e0 [2025-03-17 15:43:25,876 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 15:43:25,876 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci04-overflow.c [2025-03-17 15:43:25,881 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcfe6e8d6/1113b4712ff2431982676e320e60d0e5/FLAGa5fcd34e0 [2025-03-17 15:43:26,227 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcfe6e8d6/1113b4712ff2431982676e320e60d0e5 [2025-03-17 15:43:26,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 15:43:26,230 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 15:43:26,231 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 15:43:26,231 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 15:43:26,234 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 15:43:26,234 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,235 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16ab4f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26, skipping insertion in model container [2025-03-17 15:43:26,235 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,245 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 15:43:26,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 15:43:26,337 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 15:43:26,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 15:43:26,353 INFO L204 MainTranslator]: Completed translation [2025-03-17 15:43:26,354 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26 WrapperNode [2025-03-17 15:43:26,354 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 15:43:26,355 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 15:43:26,355 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 15:43:26,355 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 15:43:26,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,363 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,372 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2025-03-17 15:43:26,373 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 15:43:26,374 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 15:43:26,375 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 15:43:26,375 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 15:43:26,379 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,380 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,391 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-17 15:43:26,392 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,392 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,393 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,396 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,399 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,399 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,400 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 15:43:26,401 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 15:43:26,401 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 15:43:26,401 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 15:43:26,401 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (1/1) ... [2025-03-17 15:43:26,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 15:43:26,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:26,424 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-17 15:43:26,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-17 15:43:26,441 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-03-17 15:43:26,441 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-03-17 15:43:26,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 15:43:26,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 15:43:26,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 15:43:26,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 15:43:26,484 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 15:43:26,486 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 15:43:26,576 INFO L1322 $ProcedureCfgBuilder]: dead code at ProgramPoint L24: havoc #t~ret4;havoc #t~ret5; [2025-03-17 15:43:26,611 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2025-03-17 15:43:26,613 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 15:43:26,619 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 15:43:26,621 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 15:43:26,622 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 03:43:26 BoogieIcfgContainer [2025-03-17 15:43:26,622 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 15:43:26,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 15:43:26,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 15:43:26,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 15:43:26,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 03:43:26" (1/3) ... [2025-03-17 15:43:26,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fcd719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:43:26, skipping insertion in model container [2025-03-17 15:43:26,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 03:43:26" (2/3) ... [2025-03-17 15:43:26,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63fcd719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 03:43:26, skipping insertion in model container [2025-03-17 15:43:26,631 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 03:43:26" (3/3) ... [2025-03-17 15:43:26,631 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci04-overflow.c [2025-03-17 15:43:26,644 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 15:43:26,645 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci04-overflow.c that has 2 procedures, 28 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-03-17 15:43:26,682 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 15:43:26,691 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;@b76bdbe, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 15:43:26,693 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-17 15:43:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-17 15:43:26,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2025-03-17 15:43:26,700 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:26,700 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 15:43:26,701 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:26,705 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:26,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1750717733, now seen corresponding path program 1 times [2025-03-17 15:43:26,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:26,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416228122] [2025-03-17 15:43:26,712 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:26,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:26,754 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 15:43:26,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 15:43:26,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:26,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 15:43:26,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:26,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416228122] [2025-03-17 15:43:26,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416228122] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:26,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:43:26,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 15:43:26,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920557439] [2025-03-17 15:43:26,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:26,830 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 15:43:26,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:26,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 15:43:26,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 15:43:26,844 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 23 states have internal predecessors, (26), 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 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 15:43:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:26,880 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2025-03-17 15:43:26,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 15:43:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2025-03-17 15:43:26,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:26,885 INFO L225 Difference]: With dead ends: 33 [2025-03-17 15:43:26,886 INFO L226 Difference]: Without dead ends: 23 [2025-03-17 15:43:26,887 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 15:43:26,889 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 11 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:26,889 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:26,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-03-17 15:43:26,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2025-03-17 15:43:26,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:43:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2025-03-17 15:43:26,915 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2025-03-17 15:43:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:26,915 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2025-03-17 15:43:26,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 15:43:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2025-03-17 15:43:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-03-17 15:43:26,916 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:26,916 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:43:26,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 15:43:26,917 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:26,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:26,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1562325140, now seen corresponding path program 1 times [2025-03-17 15:43:26,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:26,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645872932] [2025-03-17 15:43:26,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:26,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:26,928 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 15:43:26,932 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 15:43:26,932 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:26,932 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 15:43:26,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:26,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645872932] [2025-03-17 15:43:26,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645872932] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:26,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:43:26,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 15:43:26,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122706948] [2025-03-17 15:43:26,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:26,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:43:26,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:26,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:43:26,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:43:26,984 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 15:43:27,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:27,047 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2025-03-17 15:43:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:43:27,047 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-03-17 15:43:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:27,048 INFO L225 Difference]: With dead ends: 23 [2025-03-17 15:43:27,048 INFO L226 Difference]: Without dead ends: 21 [2025-03-17 15:43:27,048 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-17 15:43:27,049 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:27,049 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 25 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:27,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2025-03-17 15:43:27,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2025-03-17 15:43:27,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:43:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2025-03-17 15:43:27,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 7 [2025-03-17 15:43:27,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:27,053 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2025-03-17 15:43:27,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 15:43:27,053 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2025-03-17 15:43:27,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2025-03-17 15:43:27,054 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:27,054 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:43:27,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 15:43:27,054 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:27,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:27,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1521047260, now seen corresponding path program 1 times [2025-03-17 15:43:27,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:27,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352390775] [2025-03-17 15:43:27,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:27,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:27,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 15:43:27,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 15:43:27,069 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:27,069 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:43:27,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:27,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352390775] [2025-03-17 15:43:27,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352390775] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:27,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:43:27,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 15:43:27,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081765516] [2025-03-17 15:43:27,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:27,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:43:27,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:27,206 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:43:27,206 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:43:27,206 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:43:27,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:27,247 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2025-03-17 15:43:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:43:27,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 28 [2025-03-17 15:43:27,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:27,250 INFO L225 Difference]: With dead ends: 33 [2025-03-17 15:43:27,250 INFO L226 Difference]: Without dead ends: 31 [2025-03-17 15:43:27,251 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:43:27,251 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 49 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 15:43:27,251 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 49 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2025-03-17 15:43:27,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2025-03-17 15:43:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-17 15:43:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2025-03-17 15:43:27,260 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 28 [2025-03-17 15:43:27,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:27,261 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2025-03-17 15:43:27,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:43:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2025-03-17 15:43:27,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-17 15:43:27,262 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:27,262 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 15:43:27,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 15:43:27,262 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:27,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:27,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1050152906, now seen corresponding path program 1 times [2025-03-17 15:43:27,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303167920] [2025-03-17 15:43:27,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:27,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:27,268 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 15:43:27,272 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 15:43:27,272 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:27,272 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 15:43:27,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303167920] [2025-03-17 15:43:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303167920] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:27,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201146888] [2025-03-17 15:43:27,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:27,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:27,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:27,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:27,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 15:43:27,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 23 statements into 1 equivalence classes. [2025-03-17 15:43:27,370 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 15:43:27,370 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:27,370 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:27,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-17 15:43:27,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 15:43:27,459 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:27,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 15:43:27,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201146888] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:27,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:27,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-03-17 15:43:27,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7055819] [2025-03-17 15:43:27,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:27,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 15:43:27,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:27,594 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 15:43:27,595 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-03-17 15:43:27,595 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-17 15:43:27,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:27,858 INFO L93 Difference]: Finished difference Result 89 states and 127 transitions. [2025-03-17 15:43:27,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 15:43:27,858 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 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 23 [2025-03-17 15:43:27,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:27,860 INFO L225 Difference]: With dead ends: 89 [2025-03-17 15:43:27,862 INFO L226 Difference]: Without dead ends: 63 [2025-03-17 15:43:27,863 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-03-17 15:43:27,864 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 106 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:27,864 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 83 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:43:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-03-17 15:43:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2025-03-17 15:43:27,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 40 states have internal predecessors, (41), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2025-03-17 15:43:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 66 transitions. [2025-03-17 15:43:27,874 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 66 transitions. Word has length 23 [2025-03-17 15:43:27,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:27,875 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 66 transitions. [2025-03-17 15:43:27,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-17 15:43:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 66 transitions. [2025-03-17 15:43:27,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2025-03-17 15:43:27,876 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:27,876 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 15:43:27,882 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-17 15:43:28,077 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 15:43:28,077 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:28,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:28,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1677862848, now seen corresponding path program 2 times [2025-03-17 15:43:28,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:28,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964888054] [2025-03-17 15:43:28,078 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:28,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:28,082 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-17 15:43:28,090 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 15:43:28,090 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:28,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 15:43:28,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:28,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964888054] [2025-03-17 15:43:28,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964888054] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:28,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908228023] [2025-03-17 15:43:28,181 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:28,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:28,184 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:28,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 15:43:28,204 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 23 statements into 2 equivalence classes. [2025-03-17 15:43:28,214 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 23 of 23 statements. [2025-03-17 15:43:28,215 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:28,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:28,216 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-17 15:43:28,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:28,259 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 15:43:28,259 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 15:43:28,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908228023] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:28,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 15:43:28,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-03-17 15:43:28,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640030155] [2025-03-17 15:43:28,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:28,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:43:28,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:28,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:43:28,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 15:43:28,260 INFO L87 Difference]: Start difference. First operand 51 states and 66 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:43:28,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:28,293 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2025-03-17 15:43:28,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:43:28,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2025-03-17 15:43:28,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:28,295 INFO L225 Difference]: With dead ends: 58 [2025-03-17 15:43:28,296 INFO L226 Difference]: Without dead ends: 57 [2025-03-17 15:43:28,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 15:43:28,298 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 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 15:43:28,298 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2025-03-17 15:43:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2025-03-17 15:43:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 9 states have call predecessors, (18), 6 states have call successors, (18) [2025-03-17 15:43:28,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2025-03-17 15:43:28,313 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 23 [2025-03-17 15:43:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:28,313 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2025-03-17 15:43:28,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:43:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2025-03-17 15:43:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2025-03-17 15:43:28,314 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:28,314 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 15:43:28,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-17 15:43:28,515 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 15:43:28,515 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:28,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:28,515 INFO L85 PathProgramCache]: Analyzing trace with hash 802105748, now seen corresponding path program 1 times [2025-03-17 15:43:28,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:28,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604544803] [2025-03-17 15:43:28,515 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:28,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:28,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 15:43:28,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 15:43:28,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:28,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:43:28,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604544803] [2025-03-17 15:43:28,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604544803] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:28,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435291645] [2025-03-17 15:43:28,586 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:28,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:28,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:28,588 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:28,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 15:43:28,609 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 15:43:28,618 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 15:43:28,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:28,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:28,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 15:43:28,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 15:43:28,667 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 15:43:28,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435291645] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:28,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 15:43:28,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-17 15:43:28,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985433847] [2025-03-17 15:43:28,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:28,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 15:43:28,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:28,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 15:43:28,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 15:43:28,669 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:43:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:28,696 INFO L93 Difference]: Finished difference Result 80 states and 115 transitions. [2025-03-17 15:43:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 15:43:28,697 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2025-03-17 15:43:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:28,698 INFO L225 Difference]: With dead ends: 80 [2025-03-17 15:43:28,698 INFO L226 Difference]: Without dead ends: 79 [2025-03-17 15:43:28,698 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-17 15:43:28,698 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:28,699 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 62 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2025-03-17 15:43:28,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2025-03-17 15:43:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (27), 11 states have call predecessors, (27), 7 states have call successors, (27) [2025-03-17 15:43:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 85 transitions. [2025-03-17 15:43:28,708 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 85 transitions. Word has length 30 [2025-03-17 15:43:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:28,708 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 85 transitions. [2025-03-17 15:43:28,708 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-17 15:43:28,709 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 85 transitions. [2025-03-17 15:43:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2025-03-17 15:43:28,709 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:28,710 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-17 15:43:28,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:28,914 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 15:43:28,914 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:28,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:28,914 INFO L85 PathProgramCache]: Analyzing trace with hash 627457084, now seen corresponding path program 1 times [2025-03-17 15:43:28,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:28,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628522076] [2025-03-17 15:43:28,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:28,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:28,918 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-17 15:43:28,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 15:43:28,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:28,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-03-17 15:43:29,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:29,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628522076] [2025-03-17 15:43:29,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628522076] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:29,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102672406] [2025-03-17 15:43:29,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:29,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:29,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:29,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:29,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 15:43:29,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 50 statements into 1 equivalence classes. [2025-03-17 15:43:29,074 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 50 of 50 statements. [2025-03-17 15:43:29,075 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:29,075 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:29,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 15:43:29,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-03-17 15:43:29,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-03-17 15:43:29,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102672406] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:29,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:29,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-03-17 15:43:29,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147927882] [2025-03-17 15:43:29,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:29,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 15:43:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:29,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 15:43:29,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:43:29,301 INFO L87 Difference]: Start difference. First operand 62 states and 85 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-17 15:43:29,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:29,432 INFO L93 Difference]: Finished difference Result 139 states and 215 transitions. [2025-03-17 15:43:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 15:43:29,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 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 50 [2025-03-17 15:43:29,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:29,434 INFO L225 Difference]: With dead ends: 139 [2025-03-17 15:43:29,434 INFO L226 Difference]: Without dead ends: 137 [2025-03-17 15:43:29,435 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-03-17 15:43:29,435 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:29,435 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 102 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:29,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-03-17 15:43:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 96. [2025-03-17 15:43:29,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 11 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (66), 20 states have call predecessors, (66), 10 states have call successors, (66) [2025-03-17 15:43:29,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 157 transitions. [2025-03-17 15:43:29,458 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 157 transitions. Word has length 50 [2025-03-17 15:43:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:29,459 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 157 transitions. [2025-03-17 15:43:29,459 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 16 states have internal predecessors, (43), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-17 15:43:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 157 transitions. [2025-03-17 15:43:29,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-17 15:43:29,463 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:29,463 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] [2025-03-17 15:43:29,468 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 15:43:29,663 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 15:43:29,664 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:29,664 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1296451376, now seen corresponding path program 1 times [2025-03-17 15:43:29,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:29,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965745248] [2025-03-17 15:43:29,664 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:29,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:29,670 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-17 15:43:29,677 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-17 15:43:29,677 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:29,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 50 proven. 86 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2025-03-17 15:43:29,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:29,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965745248] [2025-03-17 15:43:29,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965745248] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:29,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399706773] [2025-03-17 15:43:29,837 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 15:43:29,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:29,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:29,839 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:29,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 15:43:29,865 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 88 statements into 1 equivalence classes. [2025-03-17 15:43:29,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 88 of 88 statements. [2025-03-17 15:43:29,881 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:29,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:29,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 15:43:29,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 67 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2025-03-17 15:43:29,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 67 proven. 95 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2025-03-17 15:43:30,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399706773] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:30,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:30,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 16 [2025-03-17 15:43:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738260218] [2025-03-17 15:43:30,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:30,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 15:43:30,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:30,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 15:43:30,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:43:30,234 INFO L87 Difference]: Start difference. First operand 96 states and 157 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 15:43:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:30,382 INFO L93 Difference]: Finished difference Result 172 states and 297 transitions. [2025-03-17 15:43:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-03-17 15:43:30,383 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 88 [2025-03-17 15:43:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:30,385 INFO L225 Difference]: With dead ends: 172 [2025-03-17 15:43:30,385 INFO L226 Difference]: Without dead ends: 78 [2025-03-17 15:43:30,388 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2025-03-17 15:43:30,389 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:30,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 48 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:30,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2025-03-17 15:43:30,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2025-03-17 15:43:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 51 states have internal predecessors, (59), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (26), 12 states have call predecessors, (26), 6 states have call successors, (26) [2025-03-17 15:43:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2025-03-17 15:43:30,397 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 88 [2025-03-17 15:43:30,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:30,397 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2025-03-17 15:43:30,397 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 15:43:30,397 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2025-03-17 15:43:30,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2025-03-17 15:43:30,404 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:30,404 INFO L218 NwaCegarLoop]: trace histogram [17, 15, 13, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 4, 1, 1, 1] [2025-03-17 15:43:30,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:30,605 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 15:43:30,605 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:30,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:30,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1735747528, now seen corresponding path program 2 times [2025-03-17 15:43:30,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034592956] [2025-03-17 15:43:30,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:30,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:30,611 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 155 statements into 2 equivalence classes. [2025-03-17 15:43:30,624 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 155 of 155 statements. [2025-03-17 15:43:30,624 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:30,624 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 91 proven. 350 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2025-03-17 15:43:30,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:30,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034592956] [2025-03-17 15:43:30,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034592956] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:30,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292192767] [2025-03-17 15:43:30,835 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:30,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:30,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:30,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:30,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 15:43:30,865 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 155 statements into 2 equivalence classes. [2025-03-17 15:43:30,892 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 155 of 155 statements. [2025-03-17 15:43:30,892 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:30,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:30,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 15:43:30,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 459 proven. 183 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2025-03-17 15:43:31,012 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 107 proven. 404 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2025-03-17 15:43:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292192767] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:31,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:31,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 14] total 19 [2025-03-17 15:43:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113248594] [2025-03-17 15:43:31,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:31,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 15:43:31,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:31,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 15:43:31,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2025-03-17 15:43:31,456 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2025-03-17 15:43:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:31,663 INFO L93 Difference]: Finished difference Result 171 states and 252 transitions. [2025-03-17 15:43:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 15:43:31,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 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 155 [2025-03-17 15:43:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:31,665 INFO L225 Difference]: With dead ends: 171 [2025-03-17 15:43:31,667 INFO L226 Difference]: Without dead ends: 105 [2025-03-17 15:43:31,668 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 301 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2025-03-17 15:43:31,669 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 205 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:31,669 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 71 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:31,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2025-03-17 15:43:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2025-03-17 15:43:31,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 73 states have (on average 1.1232876712328768) internal successors, (82), 71 states have internal predecessors, (82), 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 15:43:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2025-03-17 15:43:31,680 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 128 transitions. Word has length 155 [2025-03-17 15:43:31,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:31,680 INFO L471 AbstractCegarLoop]: Abstraction has 93 states and 128 transitions. [2025-03-17 15:43:31,680 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 19 states have internal predecessors, (110), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2025-03-17 15:43:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 128 transitions. [2025-03-17 15:43:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2025-03-17 15:43:31,681 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:31,682 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] [2025-03-17 15:43:31,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:31,882 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 15:43:31,882 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:31,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1769532336, now seen corresponding path program 3 times [2025-03-17 15:43:31,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:31,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653949546] [2025-03-17 15:43:31,883 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:31,887 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 88 statements into 8 equivalence classes. [2025-03-17 15:43:31,894 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 49 of 88 statements. [2025-03-17 15:43:31,894 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-17 15:43:31,894 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:32,029 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 15:43:32,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:32,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653949546] [2025-03-17 15:43:32,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653949546] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:32,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312658838] [2025-03-17 15:43:32,030 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:32,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:32,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:32,032 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:32,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 15:43:32,056 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 88 statements into 8 equivalence classes. [2025-03-17 15:43:32,066 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) and asserted 49 of 88 statements. [2025-03-17 15:43:32,066 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2025-03-17 15:43:32,066 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:32,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 15:43:32,069 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:32,136 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 15:43:32,137 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:32,274 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 15:43:32,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312658838] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:32,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:32,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2025-03-17 15:43:32,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276148737] [2025-03-17 15:43:32,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:32,275 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 15:43:32,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:32,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 15:43:32,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:43:32,275 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 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 15:43:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:32,336 INFO L93 Difference]: Finished difference Result 99 states and 135 transitions. [2025-03-17 15:43:32,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 15:43:32,337 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 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 88 [2025-03-17 15:43:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:32,338 INFO L225 Difference]: With dead ends: 99 [2025-03-17 15:43:32,338 INFO L226 Difference]: Without dead ends: 98 [2025-03-17 15:43:32,338 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 164 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 15:43:32,339 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:32,339 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 138 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-17 15:43:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2025-03-17 15:43:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.095890410958904) internal successors, (80), 70 states have internal predecessors, (80), 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 15:43:32,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2025-03-17 15:43:32,349 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 88 [2025-03-17 15:43:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:32,349 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2025-03-17 15:43:32,349 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 16 states have internal predecessors, (50), 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 15:43:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2025-03-17 15:43:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2025-03-17 15:43:32,351 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:32,351 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1] [2025-03-17 15:43:32,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:32,551 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 15:43:32,552 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:32,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:32,553 INFO L85 PathProgramCache]: Analyzing trace with hash -488443506, now seen corresponding path program 2 times [2025-03-17 15:43:32,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:32,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096489983] [2025-03-17 15:43:32,553 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:32,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:32,557 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 83 statements into 2 equivalence classes. [2025-03-17 15:43:32,561 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 83 of 83 statements. [2025-03-17 15:43:32,561 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:32,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2025-03-17 15:43:32,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:32,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096489983] [2025-03-17 15:43:32,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096489983] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 15:43:32,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 15:43:32,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 15:43:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486759413] [2025-03-17 15:43:32,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 15:43:32,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 15:43:32,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:32,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 15:43:32,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 15:43:32,609 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 15:43:32,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:32,626 INFO L93 Difference]: Finished difference Result 99 states and 133 transitions. [2025-03-17 15:43:32,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 15:43:32,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 83 [2025-03-17 15:43:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:32,627 INFO L225 Difference]: With dead ends: 99 [2025-03-17 15:43:32,627 INFO L226 Difference]: Without dead ends: 98 [2025-03-17 15:43:32,628 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 15:43:32,631 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 47 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 15:43:32,632 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 47 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-17 15:43:32,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2025-03-17 15:43:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2025-03-17 15:43:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 73 states have (on average 1.095890410958904) internal successors, (80), 70 states have internal predecessors, (80), 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 15:43:32,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2025-03-17 15:43:32,642 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 83 [2025-03-17 15:43:32,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:32,642 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2025-03-17 15:43:32,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 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 15:43:32,642 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2025-03-17 15:43:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-03-17 15:43:32,643 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:32,643 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] [2025-03-17 15:43:32,643 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 15:43:32,643 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:32,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:32,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1998624285, now seen corresponding path program 3 times [2025-03-17 15:43:32,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:32,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37189909] [2025-03-17 15:43:32,644 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:32,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:32,647 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 84 statements into 7 equivalence classes. [2025-03-17 15:43:32,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 78 of 84 statements. [2025-03-17 15:43:32,653 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 15:43:32,653 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:32,749 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 15:43:32,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37189909] [2025-03-17 15:43:32,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37189909] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:32,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453140845] [2025-03-17 15:43:32,749 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:32,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:32,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:32,751 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:32,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 15:43:32,778 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 84 statements into 7 equivalence classes. [2025-03-17 15:43:32,792 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 78 of 84 statements. [2025-03-17 15:43:32,793 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-17 15:43:32,793 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:32,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 15:43:32,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:32,847 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 15:43:32,847 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:33,098 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 15:43:33,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453140845] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:33,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:33,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 16 [2025-03-17 15:43:33,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22996215] [2025-03-17 15:43:33,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:33,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-17 15:43:33,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:33,099 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-17 15:43:33,099 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2025-03-17 15:43:33,099 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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 15:43:33,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:33,214 INFO L93 Difference]: Finished difference Result 155 states and 217 transitions. [2025-03-17 15:43:33,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 15:43:33,214 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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 84 [2025-03-17 15:43:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:33,215 INFO L225 Difference]: With dead ends: 155 [2025-03-17 15:43:33,215 INFO L226 Difference]: Without dead ends: 65 [2025-03-17 15:43:33,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 160 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2025-03-17 15:43:33,216 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:33,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 74 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-17 15:43:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2025-03-17 15:43:33,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.06) internal successors, (53), 48 states have internal predecessors, (53), 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 15:43:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2025-03-17 15:43:33,220 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 84 [2025-03-17 15:43:33,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:33,221 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2025-03-17 15:43:33,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 states have internal predecessors, (79), 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 15:43:33,221 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2025-03-17 15:43:33,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2025-03-17 15:43:33,222 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:33,222 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] [2025-03-17 15:43:33,231 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 15:43:33,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-03-17 15:43:33,423 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:33,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -918115453, now seen corresponding path program 4 times [2025-03-17 15:43:33,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:33,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183573474] [2025-03-17 15:43:33,424 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:43:33,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:33,431 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 142 statements into 2 equivalence classes. [2025-03-17 15:43:33,443 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 142 of 142 statements. [2025-03-17 15:43:33,443 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 15:43:33,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2025-03-17 15:43:33,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183573474] [2025-03-17 15:43:33,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183573474] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:33,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297420706] [2025-03-17 15:43:33,760 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:43:33,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:33,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:33,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:33,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 15:43:33,791 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 142 statements into 2 equivalence classes. [2025-03-17 15:43:33,814 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 142 of 142 statements. [2025-03-17 15:43:33,814 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 15:43:33,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:33,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-17 15:43:33,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2025-03-17 15:43:33,975 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2025-03-17 15:43:34,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297420706] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:34,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:34,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 26 [2025-03-17 15:43:34,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993868834] [2025-03-17 15:43:34,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:34,873 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-03-17 15:43:34,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:34,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-03-17 15:43:34,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2025-03-17 15:43:34,873 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 27 states have internal predecessors, (70), 7 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (18), 18 states have call predecessors, (18), 7 states have call successors, (18) [2025-03-17 15:43:35,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:35,074 INFO L93 Difference]: Finished difference Result 127 states and 179 transitions. [2025-03-17 15:43:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 15:43:35,075 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 27 states have internal predecessors, (70), 7 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (18), 18 states have call predecessors, (18), 7 states have call successors, (18) Word has length 142 [2025-03-17 15:43:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:35,076 INFO L225 Difference]: With dead ends: 127 [2025-03-17 15:43:35,077 INFO L226 Difference]: Without dead ends: 126 [2025-03-17 15:43:35,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 270 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2025-03-17 15:43:35,078 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:35,079 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 150 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2025-03-17 15:43:35,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2025-03-17 15:43:35,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 76 states have internal predecessors, (81), 11 states have call successors, (11), 6 states have call predecessors, (11), 9 states have return successors, (47), 16 states have call predecessors, (47), 10 states have call successors, (47) [2025-03-17 15:43:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 139 transitions. [2025-03-17 15:43:35,091 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 139 transitions. Word has length 142 [2025-03-17 15:43:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:35,091 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 139 transitions. [2025-03-17 15:43:35,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 27 states have internal predecessors, (70), 7 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (18), 18 states have call predecessors, (18), 7 states have call successors, (18) [2025-03-17 15:43:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 139 transitions. [2025-03-17 15:43:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2025-03-17 15:43:35,093 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:35,093 INFO L218 NwaCegarLoop]: trace histogram [36, 34, 29, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 11, 7, 1, 1, 1] [2025-03-17 15:43:35,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:35,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-17 15:43:35,294 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:35,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:35,295 INFO L85 PathProgramCache]: Analyzing trace with hash 946566578, now seen corresponding path program 5 times [2025-03-17 15:43:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:35,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986245870] [2025-03-17 15:43:35,295 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:43:35,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:35,304 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 344 statements into 27 equivalence classes. [2025-03-17 15:43:35,322 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 192 of 344 statements. [2025-03-17 15:43:35,322 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-17 15:43:35,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 497 proven. 1063 refuted. 0 times theorem prover too weak. 2639 trivial. 0 not checked. [2025-03-17 15:43:35,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:35,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986245870] [2025-03-17 15:43:35,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986245870] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:35,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587496699] [2025-03-17 15:43:35,525 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:43:35,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:35,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:35,530 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:35,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 15:43:35,593 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 344 statements into 27 equivalence classes. [2025-03-17 15:43:35,629 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) and asserted 192 of 344 statements. [2025-03-17 15:43:35,629 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2025-03-17 15:43:35,629 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:35,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 15:43:35,635 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:35,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 496 proven. 1088 refuted. 0 times theorem prover too weak. 2615 trivial. 0 not checked. [2025-03-17 15:43:35,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4199 backedges. 508 proven. 1103 refuted. 0 times theorem prover too weak. 2588 trivial. 0 not checked. [2025-03-17 15:43:36,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587496699] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:36,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:36,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 17] total 22 [2025-03-17 15:43:36,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361625819] [2025-03-17 15:43:36,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:36,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 15:43:36,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:36,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 15:43:36,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2025-03-17 15:43:36,571 INFO L87 Difference]: Start difference. First operand 99 states and 139 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 13 states have call successors, (19), 1 states have call predecessors, (19), 10 states have return successors, (24), 14 states have call predecessors, (24), 13 states have call successors, (24) [2025-03-17 15:43:36,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:36,944 INFO L93 Difference]: Finished difference Result 232 states and 348 transitions. [2025-03-17 15:43:36,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-03-17 15:43:36,944 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 13 states have call successors, (19), 1 states have call predecessors, (19), 10 states have return successors, (24), 14 states have call predecessors, (24), 13 states have call successors, (24) Word has length 344 [2025-03-17 15:43:36,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:36,946 INFO L225 Difference]: With dead ends: 232 [2025-03-17 15:43:36,947 INFO L226 Difference]: Without dead ends: 137 [2025-03-17 15:43:36,948 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 679 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2025-03-17 15:43:36,950 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 159 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:36,950 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 141 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:43:36,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-03-17 15:43:36,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2025-03-17 15:43:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 82 states have internal predecessors, (87), 13 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (34), 14 states have call predecessors, (34), 12 states have call successors, (34) [2025-03-17 15:43:36,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 134 transitions. [2025-03-17 15:43:36,961 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 134 transitions. Word has length 344 [2025-03-17 15:43:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:36,961 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 134 transitions. [2025-03-17 15:43:36,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 22 states have internal predecessors, (116), 13 states have call successors, (19), 1 states have call predecessors, (19), 10 states have return successors, (24), 14 states have call predecessors, (24), 13 states have call successors, (24) [2025-03-17 15:43:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 134 transitions. [2025-03-17 15:43:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2025-03-17 15:43:36,965 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:36,965 INFO L218 NwaCegarLoop]: trace histogram [31, 30, 25, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 6, 1, 1, 1] [2025-03-17 15:43:36,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:37,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 15:43:37,170 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:37,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:37,171 INFO L85 PathProgramCache]: Analyzing trace with hash 587176008, now seen corresponding path program 6 times [2025-03-17 15:43:37,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:37,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897841315] [2025-03-17 15:43:37,171 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:43:37,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:37,182 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 299 statements into 21 equivalence classes. [2025-03-17 15:43:37,208 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 263 of 299 statements. [2025-03-17 15:43:37,208 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-17 15:43:37,208 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:37,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 688 proven. 797 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2025-03-17 15:43:37,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:37,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897841315] [2025-03-17 15:43:37,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897841315] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:37,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513945693] [2025-03-17 15:43:37,461 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:43:37,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:37,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:37,463 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:37,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 15:43:37,511 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 299 statements into 21 equivalence classes. [2025-03-17 15:43:37,560 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 263 of 299 statements. [2025-03-17 15:43:37,560 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-17 15:43:37,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:37,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 15:43:37,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:37,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 690 proven. 797 refuted. 0 times theorem prover too weak. 1663 trivial. 0 not checked. [2025-03-17 15:43:37,672 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 706 proven. 824 refuted. 0 times theorem prover too weak. 1620 trivial. 0 not checked. [2025-03-17 15:43:38,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513945693] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:38,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:38,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-03-17 15:43:38,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401467000] [2025-03-17 15:43:38,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:38,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 15:43:38,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:38,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 15:43:38,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2025-03-17 15:43:38,613 INFO L87 Difference]: Start difference. First operand 105 states and 134 transitions. Second operand has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 16 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) [2025-03-17 15:43:38,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:38,908 INFO L93 Difference]: Finished difference Result 236 states and 320 transitions. [2025-03-17 15:43:38,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-17 15:43:38,908 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 16 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) Word has length 299 [2025-03-17 15:43:38,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:38,909 INFO L225 Difference]: With dead ends: 236 [2025-03-17 15:43:38,909 INFO L226 Difference]: Without dead ends: 135 [2025-03-17 15:43:38,910 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 586 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=347, Invalid=985, Unknown=0, NotChecked=0, Total=1332 [2025-03-17 15:43:38,911 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 91 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:38,911 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 173 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:43:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2025-03-17 15:43:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 114. [2025-03-17 15:43:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 91 states have (on average 1.043956043956044) internal successors, (95), 90 states have internal predecessors, (95), 15 states have call successors, (15), 11 states have call predecessors, (15), 7 states have return successors, (29), 12 states have call predecessors, (29), 14 states have call successors, (29) [2025-03-17 15:43:38,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 139 transitions. [2025-03-17 15:43:38,923 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 139 transitions. Word has length 299 [2025-03-17 15:43:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:38,923 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 139 transitions. [2025-03-17 15:43:38,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.375) internal successors, (129), 24 states have internal predecessors, (129), 16 states have call successors, (22), 1 states have call predecessors, (22), 10 states have return successors, (27), 14 states have call predecessors, (27), 16 states have call successors, (27) [2025-03-17 15:43:38,923 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 139 transitions. [2025-03-17 15:43:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 666 [2025-03-17 15:43:38,931 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:38,931 INFO L218 NwaCegarLoop]: trace histogram [70, 65, 57, 36, 36, 36, 36, 33, 33, 33, 33, 33, 32, 32, 32, 31, 21, 13, 1, 1, 1] [2025-03-17 15:43:38,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 15:43:39,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-17 15:43:39,133 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:39,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:39,133 INFO L85 PathProgramCache]: Analyzing trace with hash 588949529, now seen corresponding path program 7 times [2025-03-17 15:43:39,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:39,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960992267] [2025-03-17 15:43:39,133 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:43:39,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:39,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 665 statements into 1 equivalence classes. [2025-03-17 15:43:39,197 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 665 of 665 statements. [2025-03-17 15:43:39,197 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:39,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16076 backedges. 1002 proven. 3742 refuted. 0 times theorem prover too weak. 11332 trivial. 0 not checked. [2025-03-17 15:43:39,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960992267] [2025-03-17 15:43:39,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960992267] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:39,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018617274] [2025-03-17 15:43:39,940 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:43:39,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:39,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:39,942 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:39,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 15:43:40,012 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 665 statements into 1 equivalence classes. [2025-03-17 15:43:40,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 665 of 665 statements. [2025-03-17 15:43:40,111 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:43:40,111 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:40,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 1248 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 15:43:40,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16076 backedges. 6692 proven. 2739 refuted. 0 times theorem prover too weak. 6645 trivial. 0 not checked. [2025-03-17 15:43:40,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16076 backedges. 1210 proven. 4054 refuted. 0 times theorem prover too weak. 10812 trivial. 0 not checked. [2025-03-17 15:43:41,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018617274] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:41,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:41,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 23] total 28 [2025-03-17 15:43:41,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673870256] [2025-03-17 15:43:41,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:41,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-17 15:43:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:41,654 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-17 15:43:41,654 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2025-03-17 15:43:41,654 INFO L87 Difference]: Start difference. First operand 114 states and 139 transitions. Second operand has 28 states, 28 states have (on average 5.75) internal successors, (161), 28 states have internal predecessors, (161), 23 states have call successors, (29), 6 states have call predecessors, (29), 10 states have return successors, (29), 11 states have call predecessors, (29), 19 states have call successors, (29) [2025-03-17 15:43:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:41,984 INFO L93 Difference]: Finished difference Result 270 states and 355 transitions. [2025-03-17 15:43:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-17 15:43:41,984 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.75) internal successors, (161), 28 states have internal predecessors, (161), 23 states have call successors, (29), 6 states have call predecessors, (29), 10 states have return successors, (29), 11 states have call predecessors, (29), 19 states have call successors, (29) Word has length 665 [2025-03-17 15:43:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:41,986 INFO L225 Difference]: With dead ends: 270 [2025-03-17 15:43:41,986 INFO L226 Difference]: Without dead ends: 160 [2025-03-17 15:43:41,987 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1380 GetRequests, 1314 SyntacticMatches, 17 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=1851, Unknown=0, NotChecked=0, Total=2550 [2025-03-17 15:43:41,987 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 375 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:41,987 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 94 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:41,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2025-03-17 15:43:41,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 123. [2025-03-17 15:43:41,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 97 states have internal predecessors, (102), 16 states have call successors, (16), 12 states have call predecessors, (16), 8 states have return successors, (35), 13 states have call predecessors, (35), 15 states have call successors, (35) [2025-03-17 15:43:41,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 153 transitions. [2025-03-17 15:43:41,994 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 153 transitions. Word has length 665 [2025-03-17 15:43:41,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:41,995 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 153 transitions. [2025-03-17 15:43:41,995 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.75) internal successors, (161), 28 states have internal predecessors, (161), 23 states have call successors, (29), 6 states have call predecessors, (29), 10 states have return successors, (29), 11 states have call predecessors, (29), 19 states have call successors, (29) [2025-03-17 15:43:41,995 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 153 transitions. [2025-03-17 15:43:41,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2025-03-17 15:43:41,996 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:41,996 INFO L218 NwaCegarLoop]: trace histogram [42, 40, 34, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 19, 13, 8, 1, 1, 1] [2025-03-17 15:43:42,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 15:43:42,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 15:43:42,201 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:42,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:42,201 INFO L85 PathProgramCache]: Analyzing trace with hash 187494273, now seen corresponding path program 8 times [2025-03-17 15:43:42,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:42,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673128037] [2025-03-17 15:43:42,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:42,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:42,213 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 403 statements into 2 equivalence classes. [2025-03-17 15:43:42,237 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 403 of 403 statements. [2025-03-17 15:43:42,238 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:42,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 830 proven. 1470 refuted. 0 times theorem prover too weak. 3503 trivial. 0 not checked. [2025-03-17 15:43:43,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:43,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673128037] [2025-03-17 15:43:43,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673128037] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:43,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095392212] [2025-03-17 15:43:43,650 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:43:43,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:43,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:43,653 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:43,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 15:43:43,724 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 403 statements into 2 equivalence classes. [2025-03-17 15:43:43,779 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 403 of 403 statements. [2025-03-17 15:43:43,780 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:43:43,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:43,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-03-17 15:43:43,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3871 trivial. 0 not checked. [2025-03-17 15:43:44,068 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 1149 proven. 1015 refuted. 0 times theorem prover too weak. 3639 trivial. 0 not checked. [2025-03-17 15:43:48,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095392212] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:48,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:48,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 45 [2025-03-17 15:43:48,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989808109] [2025-03-17 15:43:48,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:48,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-17 15:43:48,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:48,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-17 15:43:48,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2025-03-17 15:43:48,890 INFO L87 Difference]: Start difference. First operand 123 states and 153 transitions. Second operand has 46 states, 45 states have (on average 2.6) internal successors, (117), 46 states have internal predecessors, (117), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) [2025-03-17 15:43:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:49,023 INFO L93 Difference]: Finished difference Result 154 states and 207 transitions. [2025-03-17 15:43:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-17 15:43:49,023 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.6) internal successors, (117), 46 states have internal predecessors, (117), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) Word has length 403 [2025-03-17 15:43:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:49,024 INFO L225 Difference]: With dead ends: 154 [2025-03-17 15:43:49,025 INFO L226 Difference]: Without dead ends: 153 [2025-03-17 15:43:49,025 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 790 SyntacticMatches, 51 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2454 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=544, Invalid=1906, Unknown=0, NotChecked=0, Total=2450 [2025-03-17 15:43:49,025 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:49,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 180 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:43:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2025-03-17 15:43:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 144. [2025-03-17 15:43:49,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 113 states have internal predecessors, (119), 18 states have call successors, (18), 12 states have call predecessors, (18), 10 states have return successors, (55), 18 states have call predecessors, (55), 17 states have call successors, (55) [2025-03-17 15:43:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 192 transitions. [2025-03-17 15:43:49,033 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 192 transitions. Word has length 403 [2025-03-17 15:43:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:49,035 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 192 transitions. [2025-03-17 15:43:49,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.6) internal successors, (117), 46 states have internal predecessors, (117), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (31), 31 states have call predecessors, (31), 12 states have call successors, (31) [2025-03-17 15:43:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 192 transitions. [2025-03-17 15:43:49,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2025-03-17 15:43:49,040 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:49,040 INFO L218 NwaCegarLoop]: trace histogram [83, 82, 67, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 40, 26, 16, 1, 1, 1] [2025-03-17 15:43:49,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-17 15:43:49,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 15:43:49,243 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:49,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:49,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1708866022, now seen corresponding path program 9 times [2025-03-17 15:43:49,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:49,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644620896] [2025-03-17 15:43:49,244 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:49,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:49,259 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 809 statements into 64 equivalence classes. [2025-03-17 15:43:49,330 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) and asserted 604 of 809 statements. [2025-03-17 15:43:49,330 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2025-03-17 15:43:49,330 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2344 proven. 4189 refuted. 0 times theorem prover too weak. 17326 trivial. 0 not checked. [2025-03-17 15:43:49,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:49,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644620896] [2025-03-17 15:43:49,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644620896] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:49,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082012963] [2025-03-17 15:43:49,784 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 15:43:49,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:49,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:49,786 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:49,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 15:43:49,928 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 809 statements into 64 equivalence classes. [2025-03-17 15:43:50,051 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) and asserted 604 of 809 statements. [2025-03-17 15:43:50,051 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2025-03-17 15:43:50,051 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:50,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 15:43:50,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2324 proven. 4206 refuted. 0 times theorem prover too weak. 17329 trivial. 0 not checked. [2025-03-17 15:43:50,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2324 proven. 4323 refuted. 0 times theorem prover too weak. 17212 trivial. 0 not checked. [2025-03-17 15:43:52,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082012963] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:52,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:52,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 25] total 29 [2025-03-17 15:43:52,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497088525] [2025-03-17 15:43:52,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:52,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 15:43:52,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:52,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 15:43:52,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2025-03-17 15:43:52,083 INFO L87 Difference]: Start difference. First operand 144 states and 192 transitions. Second operand has 29 states, 29 states have (on average 5.344827586206897) internal successors, (155), 29 states have internal predecessors, (155), 19 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (32), 16 states have call predecessors, (32), 19 states have call successors, (32) [2025-03-17 15:43:52,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:52,564 INFO L93 Difference]: Finished difference Result 362 states and 521 transitions. [2025-03-17 15:43:52,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-03-17 15:43:52,564 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.344827586206897) internal successors, (155), 29 states have internal predecessors, (155), 19 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (32), 16 states have call predecessors, (32), 19 states have call successors, (32) Word has length 809 [2025-03-17 15:43:52,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:52,566 INFO L225 Difference]: With dead ends: 362 [2025-03-17 15:43:52,567 INFO L226 Difference]: Without dead ends: 222 [2025-03-17 15:43:52,568 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1671 GetRequests, 1606 SyntacticMatches, 12 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2025-03-17 15:43:52,569 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 247 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:52,569 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 153 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:43:52,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2025-03-17 15:43:52,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 180. [2025-03-17 15:43:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 145 states have (on average 1.0413793103448277) internal successors, (151), 142 states have internal predecessors, (151), 23 states have call successors, (23), 16 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 15:43:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 238 transitions. [2025-03-17 15:43:52,579 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 238 transitions. Word has length 809 [2025-03-17 15:43:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:52,580 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 238 transitions. [2025-03-17 15:43:52,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.344827586206897) internal successors, (155), 29 states have internal predecessors, (155), 19 states have call successors, (25), 1 states have call predecessors, (25), 12 states have return successors, (32), 16 states have call predecessors, (32), 19 states have call successors, (32) [2025-03-17 15:43:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 238 transitions. [2025-03-17 15:43:52,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2025-03-17 15:43:52,584 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:52,584 INFO L218 NwaCegarLoop]: trace histogram [83, 82, 67, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 40, 26, 16, 1, 1, 1] [2025-03-17 15:43:52,591 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 15:43:52,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:52,785 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:52,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash 506070930, now seen corresponding path program 10 times [2025-03-17 15:43:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:52,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729601484] [2025-03-17 15:43:52,786 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:43:52,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:52,799 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 809 statements into 2 equivalence classes. [2025-03-17 15:43:52,822 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 480 of 809 statements. [2025-03-17 15:43:52,822 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:43:52,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2257 proven. 4945 refuted. 0 times theorem prover too weak. 16657 trivial. 0 not checked. [2025-03-17 15:43:53,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:53,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729601484] [2025-03-17 15:43:53,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729601484] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:53,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971416854] [2025-03-17 15:43:53,197 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 15:43:53,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:53,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:53,199 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:53,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 15:43:53,341 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 809 statements into 2 equivalence classes. [2025-03-17 15:43:53,408 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 480 of 809 statements. [2025-03-17 15:43:53,409 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-17 15:43:53,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:53,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-17 15:43:53,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:53,615 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 12210 proven. 2667 refuted. 0 times theorem prover too weak. 8982 trivial. 0 not checked. [2025-03-17 15:43:53,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:43:56,019 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2246 proven. 5308 refuted. 0 times theorem prover too weak. 16305 trivial. 0 not checked. [2025-03-17 15:43:56,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971416854] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:43:56,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:43:56,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 27] total 32 [2025-03-17 15:43:56,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421311721] [2025-03-17 15:43:56,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:43:56,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 15:43:56,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:43:56,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 15:43:56,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2025-03-17 15:43:56,022 INFO L87 Difference]: Start difference. First operand 180 states and 238 transitions. Second operand has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-03-17 15:43:56,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:43:56,412 INFO L93 Difference]: Finished difference Result 359 states and 492 transitions. [2025-03-17 15:43:56,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-03-17 15:43:56,413 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) Word has length 809 [2025-03-17 15:43:56,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:43:56,415 INFO L225 Difference]: With dead ends: 359 [2025-03-17 15:43:56,416 INFO L226 Difference]: Without dead ends: 183 [2025-03-17 15:43:56,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1662 GetRequests, 1601 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2025-03-17 15:43:56,418 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 284 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:43:56,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 235 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:43:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2025-03-17 15:43:56,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 147. [2025-03-17 15:43:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 116 states have internal predecessors, (121), 19 states have call successors, (19), 14 states have call predecessors, (19), 9 states have return successors, (45), 16 states have call predecessors, (45), 18 states have call successors, (45) [2025-03-17 15:43:56,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 185 transitions. [2025-03-17 15:43:56,426 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 185 transitions. Word has length 809 [2025-03-17 15:43:56,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:43:56,427 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 185 transitions. [2025-03-17 15:43:56,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-03-17 15:43:56,428 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 185 transitions. [2025-03-17 15:43:56,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2025-03-17 15:43:56,432 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:43:56,432 INFO L218 NwaCegarLoop]: trace histogram [93, 92, 75, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 45, 29, 18, 1, 1, 1] [2025-03-17 15:43:56,440 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 15:43:56,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:56,636 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:43:56,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:43:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash 76632690, now seen corresponding path program 11 times [2025-03-17 15:43:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:43:56,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661233464] [2025-03-17 15:43:56,637 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:43:56,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:43:56,652 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 907 statements into 66 equivalence classes. [2025-03-17 15:43:56,735 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) and asserted 827 of 907 statements. [2025-03-17 15:43:56,735 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2025-03-17 15:43:56,735 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 30053 backedges. 5427 proven. 2955 refuted. 0 times theorem prover too weak. 21671 trivial. 0 not checked. [2025-03-17 15:43:57,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:43:57,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661233464] [2025-03-17 15:43:57,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661233464] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:43:57,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465925162] [2025-03-17 15:43:57,555 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-17 15:43:57,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:43:57,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:43:57,560 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:43:57,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 15:43:57,749 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 907 statements into 66 equivalence classes. [2025-03-17 15:43:57,932 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) and asserted 827 of 907 statements. [2025-03-17 15:43:57,933 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2025-03-17 15:43:57,933 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:43:57,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-17 15:43:57,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:43:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 30053 backedges. 5604 proven. 3105 refuted. 0 times theorem prover too weak. 21344 trivial. 0 not checked. [2025-03-17 15:43:58,100 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:00,553 INFO L134 CoverageAnalysis]: Checked inductivity of 30053 backedges. 5604 proven. 3246 refuted. 0 times theorem prover too weak. 21203 trivial. 0 not checked. [2025-03-17 15:44:00,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465925162] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:00,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:00,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 29] total 35 [2025-03-17 15:44:00,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611847490] [2025-03-17 15:44:00,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:00,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-03-17 15:44:00,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:00,555 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-03-17 15:44:00,555 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2025-03-17 15:44:00,556 INFO L87 Difference]: Start difference. First operand 147 states and 185 transitions. Second operand has 35 states, 35 states have (on average 5.4) internal successors, (189), 35 states have internal predecessors, (189), 26 states have call successors, (32), 1 states have call predecessors, (32), 15 states have return successors, (42), 18 states have call predecessors, (42), 26 states have call successors, (42) [2025-03-17 15:44:00,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:00,937 INFO L93 Difference]: Finished difference Result 328 states and 419 transitions. [2025-03-17 15:44:00,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-17 15:44:00,938 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.4) internal successors, (189), 35 states have internal predecessors, (189), 26 states have call successors, (32), 1 states have call predecessors, (32), 15 states have return successors, (42), 18 states have call predecessors, (42), 26 states have call successors, (42) Word has length 907 [2025-03-17 15:44:00,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:00,940 INFO L225 Difference]: With dead ends: 328 [2025-03-17 15:44:00,940 INFO L226 Difference]: Without dead ends: 185 [2025-03-17 15:44:00,942 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1862 GetRequests, 1795 SyntacticMatches, 14 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=2229, Unknown=0, NotChecked=0, Total=2970 [2025-03-17 15:44:00,942 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 226 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:00,942 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 235 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-17 15:44:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2025-03-17 15:44:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 147. [2025-03-17 15:44:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 118 states have (on average 1.0254237288135593) internal successors, (121), 116 states have internal predecessors, (121), 19 states have call successors, (19), 14 states have call predecessors, (19), 9 states have return successors, (40), 16 states have call predecessors, (40), 18 states have call successors, (40) [2025-03-17 15:44:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 180 transitions. [2025-03-17 15:44:00,953 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 180 transitions. Word has length 907 [2025-03-17 15:44:00,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:00,954 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 180 transitions. [2025-03-17 15:44:00,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.4) internal successors, (189), 35 states have internal predecessors, (189), 26 states have call successors, (32), 1 states have call predecessors, (32), 15 states have return successors, (42), 18 states have call predecessors, (42), 26 states have call successors, (42) [2025-03-17 15:44:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 180 transitions. [2025-03-17 15:44:00,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1739 [2025-03-17 15:44:00,966 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:00,966 INFO L218 NwaCegarLoop]: trace histogram [179, 175, 145, 90, 90, 90, 90, 88, 88, 88, 88, 88, 87, 87, 87, 86, 55, 34, 1, 1, 1] [2025-03-17 15:44:00,974 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 15:44:01,167 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 15:44:01,167 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:01,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1162488539, now seen corresponding path program 12 times [2025-03-17 15:44:01,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:01,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457114624] [2025-03-17 15:44:01,168 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:44:01,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:01,191 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1738 statements into 135 equivalence classes. [2025-03-17 15:44:01,287 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) and asserted 1166 of 1738 statements. [2025-03-17 15:44:01,287 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) [2025-03-17 15:44:01,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 111302 backedges. 7533 proven. 9858 refuted. 0 times theorem prover too weak. 93911 trivial. 0 not checked. [2025-03-17 15:44:02,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:02,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457114624] [2025-03-17 15:44:02,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457114624] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:02,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323099236] [2025-03-17 15:44:02,565 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-17 15:44:02,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:02,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:02,569 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 15:44:02,569 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 15:44:02,776 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1738 statements into 135 equivalence classes. [2025-03-17 15:44:03,039 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) and asserted 1166 of 1738 statements. [2025-03-17 15:44:03,039 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 84 check-sat command(s) [2025-03-17 15:44:03,039 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:03,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 2173 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-17 15:44:03,057 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:03,202 INFO L134 CoverageAnalysis]: Checked inductivity of 111302 backedges. 7424 proven. 8719 refuted. 0 times theorem prover too weak. 95159 trivial. 0 not checked. [2025-03-17 15:44:03,202 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 111302 backedges. 7432 proven. 8805 refuted. 0 times theorem prover too weak. 95065 trivial. 0 not checked. [2025-03-17 15:44:05,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323099236] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:05,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:05,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 29] total 39 [2025-03-17 15:44:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339002792] [2025-03-17 15:44:05,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:05,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-03-17 15:44:05,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:05,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-03-17 15:44:05,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1229, Unknown=0, NotChecked=0, Total=1482 [2025-03-17 15:44:05,678 INFO L87 Difference]: Start difference. First operand 147 states and 180 transitions. Second operand has 39 states, 39 states have (on average 5.153846153846154) internal successors, (201), 36 states have internal predecessors, (201), 23 states have call successors, (35), 7 states have call predecessors, (35), 14 states have return successors, (38), 23 states have call predecessors, (38), 18 states have call successors, (38) [2025-03-17 15:44:06,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:06,538 INFO L93 Difference]: Finished difference Result 480 states and 712 transitions. [2025-03-17 15:44:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2025-03-17 15:44:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.153846153846154) internal successors, (201), 36 states have internal predecessors, (201), 23 states have call successors, (35), 7 states have call predecessors, (35), 14 states have return successors, (38), 23 states have call predecessors, (38), 18 states have call successors, (38) Word has length 1738 [2025-03-17 15:44:06,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:06,541 INFO L225 Difference]: With dead ends: 480 [2025-03-17 15:44:06,541 INFO L226 Difference]: Without dead ends: 337 [2025-03-17 15:44:06,545 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3568 GetRequests, 3463 SyntacticMatches, 11 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2743 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2086, Invalid=7034, Unknown=0, NotChecked=0, Total=9120 [2025-03-17 15:44:06,545 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 838 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:06,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [851 Valid, 206 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-03-17 15:44:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2025-03-17 15:44:06,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 312. [2025-03-17 15:44:06,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 255 states have (on average 1.0392156862745099) internal successors, (265), 250 states have internal predecessors, (265), 43 states have call successors, (43), 38 states have call predecessors, (43), 13 states have return successors, (127), 23 states have call predecessors, (127), 42 states have call successors, (127) [2025-03-17 15:44:06,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 435 transitions. [2025-03-17 15:44:06,560 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 435 transitions. Word has length 1738 [2025-03-17 15:44:06,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:06,562 INFO L471 AbstractCegarLoop]: Abstraction has 312 states and 435 transitions. [2025-03-17 15:44:06,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.153846153846154) internal successors, (201), 36 states have internal predecessors, (201), 23 states have call successors, (35), 7 states have call predecessors, (35), 14 states have return successors, (38), 23 states have call predecessors, (38), 18 states have call successors, (38) [2025-03-17 15:44:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 435 transitions. [2025-03-17 15:44:06,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1065 [2025-03-17 15:44:06,567 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:06,568 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] [2025-03-17 15:44:06,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-17 15:44:06,768 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 15:44:06,768 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:06,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:06,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1124053899, now seen corresponding path program 13 times [2025-03-17 15:44:06,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:06,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046150888] [2025-03-17 15:44:06,769 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:44:06,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:06,785 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1064 statements into 1 equivalence classes. [2025-03-17 15:44:06,837 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1064 of 1064 statements. [2025-03-17 15:44:06,837 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:06,837 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:18,695 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 15:44:18,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 15:44:18,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046150888] [2025-03-17 15:44:18,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046150888] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 15:44:18,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784900201] [2025-03-17 15:44:18,695 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-17 15:44:18,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:18,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 15:44:18,697 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 15:44:18,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-17 15:44:18,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1064 statements into 1 equivalence classes. [2025-03-17 15:44:19,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1064 of 1064 statements. [2025-03-17 15:44:19,032 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 15:44:19,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 15:44:19,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 1988 conjuncts, 217 conjuncts are in the unsatisfiable core [2025-03-17 15:44:19,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 15:44:19,705 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 15:44:19,705 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 15:44:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 41466 backedges. 7863 proven. 7392 refuted. 0 times theorem prover too weak. 26211 trivial. 0 not checked. [2025-03-17 15:44:51,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784900201] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 15:44:51,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 15:44:51,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 41] total 59 [2025-03-17 15:44:51,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262311777] [2025-03-17 15:44:51,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 15:44:51,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-03-17 15:44:51,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 15:44:51,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-03-17 15:44:51,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=2770, Unknown=0, NotChecked=0, Total=3540 [2025-03-17 15:44:51,637 INFO L87 Difference]: Start difference. First operand 312 states and 435 transitions. Second operand has 60 states, 59 states have (on average 2.559322033898305) internal successors, (151), 60 states have internal predecessors, (151), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) [2025-03-17 15:44:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-17 15:44:51,793 INFO L93 Difference]: Finished difference Result 340 states and 482 transitions. [2025-03-17 15:44:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-03-17 15:44:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.559322033898305) internal successors, (151), 60 states have internal predecessors, (151), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) Word has length 1064 [2025-03-17 15:44:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-17 15:44:51,797 INFO L225 Difference]: With dead ends: 340 [2025-03-17 15:44:51,797 INFO L226 Difference]: Without dead ends: 339 [2025-03-17 15:44:51,798 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2347 GetRequests, 2125 SyntacticMatches, 160 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7611 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=871, Invalid=3161, Unknown=0, NotChecked=0, Total=4032 [2025-03-17 15:44:51,799 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-17 15:44:51,799 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 199 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-17 15:44:51,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2025-03-17 15:44:51,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 336. [2025-03-17 15:44:51,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 275 states have (on average 1.0363636363636364) internal successors, (285), 268 states have internal predecessors, (285), 45 states have call successors, (45), 38 states have call predecessors, (45), 15 states have return successors, (144), 29 states have call predecessors, (144), 44 states have call successors, (144) [2025-03-17 15:44:51,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 474 transitions. [2025-03-17 15:44:51,816 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 474 transitions. Word has length 1064 [2025-03-17 15:44:51,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-17 15:44:51,816 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 474 transitions. [2025-03-17 15:44:51,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.559322033898305) internal successors, (151), 60 states have internal predecessors, (151), 16 states have call successors, (17), 1 states have call predecessors, (17), 17 states have return successors, (41), 41 states have call predecessors, (41), 16 states have call successors, (41) [2025-03-17 15:44:51,817 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 474 transitions. [2025-03-17 15:44:51,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2150 [2025-03-17 15:44:51,834 INFO L210 NwaCegarLoop]: Found error trace [2025-03-17 15:44:51,835 INFO L218 NwaCegarLoop]: trace histogram [220, 218, 178, 110, 110, 110, 110, 109, 109, 109, 109, 109, 109, 109, 109, 108, 68, 42, 1, 1, 1] [2025-03-17 15:44:51,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-17 15:44:52,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 15:44:52,039 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-17 15:44:52,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 15:44:52,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1491469757, now seen corresponding path program 14 times [2025-03-17 15:44:52,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 15:44:52,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939703746] [2025-03-17 15:44:52,040 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 15:44:52,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 15:44:52,072 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 2149 statements into 2 equivalence classes. [2025-03-17 15:44:52,249 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 2149 of 2149 statements. [2025-03-17 15:44:52,249 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 15:44:52,249 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat