./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 86ba16bc10375ac42edefcd6943a10cb01d22e743b7024fc57762abf0f29fc40 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:59:52,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:59:52,804 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2025-02-08 08:59:52,815 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:59:52,816 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:59:52,842 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:59:52,843 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:59:52,843 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:59:52,844 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:59:52,844 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:59:52,845 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:59:52,845 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:59:52,846 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:59:52,846 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:59:52,846 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:59:52,847 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:59:52,847 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-02-08 08:59:52,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:59:52,847 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:59:52,847 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-02-08 08:59:52,847 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:59:52,847 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-02-08 08:59:52,848 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-02-08 08:59:52,848 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:59:52,848 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-02-08 08:59:52,848 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:59:52,848 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:59:52,848 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:59:52,848 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:59:52,848 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:59:52,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:59:52,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:59:52,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:59:52,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:59:52,849 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-02-08 08:59:52,850 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-02-08 08:59:52,850 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:59:52,850 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:59:52,850 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:59:52,850 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:59:52,850 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:59:52,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:59:52,850 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86ba16bc10375ac42edefcd6943a10cb01d22e743b7024fc57762abf0f29fc40 [2025-02-08 08:59:53,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:59:53,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:59:53,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:59:53,173 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:59:53,173 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:59:53,174 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2025-02-08 08:59:54,464 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/33406a46a/6dd0619dcd504645a821d89c85a77073/FLAG331d9a538 [2025-02-08 08:59:54,696 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:59:54,697 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2025-02-08 08:59:54,703 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/33406a46a/6dd0619dcd504645a821d89c85a77073/FLAG331d9a538 [2025-02-08 08:59:54,714 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/33406a46a/6dd0619dcd504645a821d89c85a77073 [2025-02-08 08:59:54,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:59:54,718 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:59:54,719 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:59:54,719 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:59:54,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:59:54,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@909fc9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54, skipping insertion in model container [2025-02-08 08:59:54,726 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,737 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:59:54,853 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:59:54,859 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:59:54,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:59:54,880 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:59:54,880 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54 WrapperNode [2025-02-08 08:59:54,881 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:59:54,882 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:59:54,882 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:59:54,882 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:59:54,887 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,892 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,906 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2025-02-08 08:59:54,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:59:54,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:59:54,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:59:54,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:59:54,913 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,913 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,914 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,925 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-02-08 08:59:54,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,926 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,930 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,931 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,932 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,933 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:59:54,934 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:59:54,934 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:59:54,934 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:59:54,934 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (1/1) ... [2025-02-08 08:59:54,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:59:54,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:59:54,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 08:59:54,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 08:59:54,993 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-02-08 08:59:54,993 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-02-08 08:59:54,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:59:54,993 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:59:54,993 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:59:54,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:59:55,044 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:59:55,046 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:59:55,145 INFO L1324 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-02-08 08:59:55,175 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2025-02-08 08:59:55,175 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:59:55,184 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:59:55,184 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:59:55,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:59:55 BoogieIcfgContainer [2025-02-08 08:59:55,185 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:59:55,187 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:59:55,187 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:59:55,191 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:59:55,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:59:54" (1/3) ... [2025-02-08 08:59:55,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a69df6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:59:55, skipping insertion in model container [2025-02-08 08:59:55,193 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:59:54" (2/3) ... [2025-02-08 08:59:55,193 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a69df6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:59:55, skipping insertion in model container [2025-02-08 08:59:55,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:59:55" (3/3) ... [2025-02-08 08:59:55,195 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci01-2.c [2025-02-08 08:59:55,208 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:59:55,210 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci01-2.c that has 2 procedures, 30 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-02-08 08:59:55,248 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:59:55,257 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;@2d7a38ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:59:55,258 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-02-08 08:59:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-02-08 08:59:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-02-08 08:59:55,267 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 08:59:55,267 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:59:55,268 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 08:59:55,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:59:55,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1537367928, now seen corresponding path program 1 times [2025-02-08 08:59:55,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:59:55,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318410691] [2025-02-08 08:59:55,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:55,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:59:55,329 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:59:55,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:59:55,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:55,347 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:59:55,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:59:55,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318410691] [2025-02-08 08:59:55,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318410691] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:59:55,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:59:55,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:59:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216257701] [2025-02-08 08:59:55,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:59:55,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:59:55,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:59:55,462 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:59:55,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:59:55,465 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:59:55,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 08:59:55,513 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2025-02-08 08:59:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:59:55,514 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-02-08 08:59:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 08:59:55,519 INFO L225 Difference]: With dead ends: 32 [2025-02-08 08:59:55,519 INFO L226 Difference]: Without dead ends: 25 [2025-02-08 08:59:55,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:59:55,524 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 08:59:55,524 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 08:59:55,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2025-02-08 08:59:55,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2025-02-08 08:59:55,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 08:59:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2025-02-08 08:59:55,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2025-02-08 08:59:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 08:59:55,552 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2025-02-08 08:59:55,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:59:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2025-02-08 08:59:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-02-08 08:59:55,553 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 08:59:55,553 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:59:55,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:59:55,554 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 08:59:55,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:59:55,554 INFO L85 PathProgramCache]: Analyzing trace with hash -413765527, now seen corresponding path program 1 times [2025-02-08 08:59:55,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:59:55,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784748001] [2025-02-08 08:59:55,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:55,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:59:55,563 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-08 08:59:55,571 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-08 08:59:55,571 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:55,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:59:55,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:59:55,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784748001] [2025-02-08 08:59:55,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784748001] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:59:55,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:59:55,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:59:55,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61573561] [2025-02-08 08:59:55,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:59:55,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:59:55,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:59:55,656 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:59:55,656 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:59:55,657 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:59:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 08:59:55,735 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2025-02-08 08:59:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:59:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-02-08 08:59:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 08:59:55,737 INFO L225 Difference]: With dead ends: 25 [2025-02-08 08:59:55,737 INFO L226 Difference]: Without dead ends: 23 [2025-02-08 08:59:55,737 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-08 08:59:55,739 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 08:59:55,739 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 08:59:55,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2025-02-08 08:59:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2025-02-08 08:59:55,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 08:59:55,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2025-02-08 08:59:55,746 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 9 [2025-02-08 08:59:55,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 08:59:55,746 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2025-02-08 08:59:55,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:59:55,746 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2025-02-08 08:59:55,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-02-08 08:59:55,747 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 08:59:55,747 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:59:55,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:59:55,747 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 08:59:55,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:59:55,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1254102668, now seen corresponding path program 1 times [2025-02-08 08:59:55,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:59:55,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439957636] [2025-02-08 08:59:55,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:55,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:59:55,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:59:55,769 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:59:55,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:55,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-02-08 08:59:55,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:59:55,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439957636] [2025-02-08 08:59:55,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439957636] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:59:55,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:59:55,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:59:55,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348126854] [2025-02-08 08:59:55,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:59:55,910 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:59:55,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:59:55,911 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:59:55,911 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:59:55,911 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 08:59:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 08:59:55,965 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2025-02-08 08:59:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:59:55,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2025-02-08 08:59:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 08:59:55,966 INFO L225 Difference]: With dead ends: 35 [2025-02-08 08:59:55,966 INFO L226 Difference]: Without dead ends: 33 [2025-02-08 08:59:55,967 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-08 08:59:55,968 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 08:59:55,969 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 55 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 08:59:55,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2025-02-08 08:59:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2025-02-08 08:59:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-02-08 08:59:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2025-02-08 08:59:55,982 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24 [2025-02-08 08:59:55,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 08:59:55,982 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2025-02-08 08:59:55,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 08:59:55,983 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2025-02-08 08:59:55,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-02-08 08:59:55,983 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 08:59:55,984 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:59:55,984 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-08 08:59:55,984 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 08:59:55,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:59:55,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1382127837, now seen corresponding path program 1 times [2025-02-08 08:59:55,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:59:55,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027152769] [2025-02-08 08:59:55,985 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:55,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:59:55,998 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-08 08:59:56,006 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:59:56,011 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:56,012 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:56,153 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 08:59:56,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:59:56,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027152769] [2025-02-08 08:59:56,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027152769] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:59:56,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172802298] [2025-02-08 08:59:56,154 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:56,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:59:56,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:59:56,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:59:56,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 08:59:56,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-02-08 08:59:56,212 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-02-08 08:59:56,213 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:56,213 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:56,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 08:59:56,220 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:59:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-08 08:59:56,310 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:59:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-02-08 08:59:56,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172802298] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:59:56,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:59:56,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-02-08 08:59:56,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411734447] [2025-02-08 08:59:56,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:59:56,469 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:59:56,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:59:56,470 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:59:56,470 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:59:56,471 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-08 08:59:56,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 08:59:56,717 INFO L93 Difference]: Finished difference Result 91 states and 129 transitions. [2025-02-08 08:59:56,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-02-08 08:59:56,718 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2025-02-08 08:59:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 08:59:56,719 INFO L225 Difference]: With dead ends: 91 [2025-02-08 08:59:56,719 INFO L226 Difference]: Without dead ends: 65 [2025-02-08 08:59:56,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-02-08 08:59:56,721 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 107 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 08:59:56,721 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 96 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 08:59:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-02-08 08:59:56,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2025-02-08 08:59:56,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 42 states have internal predecessors, (43), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-08 08:59:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2025-02-08 08:59:56,735 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 31 [2025-02-08 08:59:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 08:59:56,736 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2025-02-08 08:59:56,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-02-08 08:59:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2025-02-08 08:59:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-02-08 08:59:56,737 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 08:59:56,737 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:59:56,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-08 08:59:56,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:59:56,938 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 08:59:56,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:59:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1331569621, now seen corresponding path program 2 times [2025-02-08 08:59:56,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:59:56,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178076197] [2025-02-08 08:59:56,938 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:59:56,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:59:56,945 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 08:59:56,951 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:59:56,951 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:59:56,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:59:57,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:59:57,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178076197] [2025-02-08 08:59:57,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178076197] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:59:57,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934587818] [2025-02-08 08:59:57,050 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:59:57,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:59:57,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:59:57,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:59:57,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 08:59:57,078 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 25 statements into 2 equivalence classes. [2025-02-08 08:59:57,089 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-02-08 08:59:57,089 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:59:57,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:57,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-02-08 08:59:57,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:59:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:59:57,143 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:59:57,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934587818] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:59:57,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:59:57,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-02-08 08:59:57,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746668345] [2025-02-08 08:59:57,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:59:57,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:59:57,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:59:57,144 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:59:57,144 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:59:57,144 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 08:59:57,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 08:59:57,174 INFO L93 Difference]: Finished difference Result 60 states and 76 transitions. [2025-02-08 08:59:57,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:59:57,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2025-02-08 08:59:57,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 08:59:57,177 INFO L225 Difference]: With dead ends: 60 [2025-02-08 08:59:57,177 INFO L226 Difference]: Without dead ends: 59 [2025-02-08 08:59:57,177 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-02-08 08:59:57,178 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 08:59:57,178 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 51 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 08:59:57,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-08 08:59:57,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2025-02-08 08:59:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 43 states have internal predecessors, (45), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 9 states have call predecessors, (18), 6 states have call successors, (18) [2025-02-08 08:59:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 70 transitions. [2025-02-08 08:59:57,195 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 70 transitions. Word has length 25 [2025-02-08 08:59:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 08:59:57,195 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 70 transitions. [2025-02-08 08:59:57,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 08:59:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 70 transitions. [2025-02-08 08:59:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-02-08 08:59:57,197 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 08:59:57,197 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:59:57,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 08:59:57,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:59:57,401 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 08:59:57,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:59:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash 127331600, now seen corresponding path program 1 times [2025-02-08 08:59:57,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:59:57,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888048478] [2025-02-08 08:59:57,402 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:57,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:59:57,406 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 08:59:57,410 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:59:57,410 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:57,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 08:59:57,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:59:57,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888048478] [2025-02-08 08:59:57,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888048478] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:59:57,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951797143] [2025-02-08 08:59:57,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:57,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:59:57,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:59:57,490 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:59:57,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 08:59:57,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-08 08:59:57,530 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:59:57,530 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:57,530 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:57,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-02-08 08:59:57,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:59:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-02-08 08:59:57,599 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:59:57,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951797143] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:59:57,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:59:57,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-02-08 08:59:57,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047418475] [2025-02-08 08:59:57,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:59:57,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:59:57,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:59:57,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:59:57,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:59:57,602 INFO L87 Difference]: Start difference. First operand 55 states and 70 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 08:59:57,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 08:59:57,645 INFO L93 Difference]: Finished difference Result 82 states and 117 transitions. [2025-02-08 08:59:57,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:59:57,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2025-02-08 08:59:57,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 08:59:57,648 INFO L225 Difference]: With dead ends: 82 [2025-02-08 08:59:57,648 INFO L226 Difference]: Without dead ends: 81 [2025-02-08 08:59:57,648 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:59:57,649 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 08:59:57,649 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 85 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 08:59:57,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2025-02-08 08:59:57,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2025-02-08 08:59:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (27), 11 states have call predecessors, (27), 7 states have call successors, (27) [2025-02-08 08:59:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2025-02-08 08:59:57,670 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 32 [2025-02-08 08:59:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 08:59:57,670 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2025-02-08 08:59:57,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-02-08 08:59:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2025-02-08 08:59:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2025-02-08 08:59:57,673 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 08:59:57,673 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:59:57,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:59:57,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:59:57,874 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 08:59:57,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:59:57,874 INFO L85 PathProgramCache]: Analyzing trace with hash 392384496, now seen corresponding path program 1 times [2025-02-08 08:59:57,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:59:57,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832586235] [2025-02-08 08:59:57,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:59:57,880 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-08 08:59:57,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-08 08:59:57,886 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:57,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:58,013 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-02-08 08:59:58,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:59:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832586235] [2025-02-08 08:59:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832586235] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:59:58,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945293168] [2025-02-08 08:59:58,014 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:58,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:59:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:59:58,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:59:58,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 08:59:58,041 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 46 statements into 1 equivalence classes. [2025-02-08 08:59:58,055 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 46 of 46 statements. [2025-02-08 08:59:58,055 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:58,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:58,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:59:58,058 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:59:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-02-08 08:59:58,141 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:59:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-02-08 08:59:58,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945293168] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:59:58,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:59:58,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-02-08 08:59:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017950547] [2025-02-08 08:59:58,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:59:58,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:59:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:59:58,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:59:58,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:59:58,350 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-08 08:59:58,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 08:59:58,571 INFO L93 Difference]: Finished difference Result 141 states and 217 transitions. [2025-02-08 08:59:58,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 08:59:58,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2025-02-08 08:59:58,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 08:59:58,577 INFO L225 Difference]: With dead ends: 141 [2025-02-08 08:59:58,577 INFO L226 Difference]: Without dead ends: 139 [2025-02-08 08:59:58,579 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:59:58,580 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 08:59:58,580 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 174 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 08:59:58,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2025-02-08 08:59:58,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 98. [2025-02-08 08:59:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 11 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (66), 20 states have call predecessors, (66), 10 states have call successors, (66) [2025-02-08 08:59:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 159 transitions. [2025-02-08 08:59:58,608 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 159 transitions. Word has length 46 [2025-02-08 08:59:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 08:59:58,608 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 159 transitions. [2025-02-08 08:59:58,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-08 08:59:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 159 transitions. [2025-02-08 08:59:58,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2025-02-08 08:59:58,611 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 08:59:58,611 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2025-02-08 08:59:58,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-02-08 08:59:58,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-02-08 08:59:58,815 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 08:59:58,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:59:58,815 INFO L85 PathProgramCache]: Analyzing trace with hash 97095890, now seen corresponding path program 1 times [2025-02-08 08:59:58,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:59:58,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342271722] [2025-02-08 08:59:58,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:58,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:59:58,822 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-02-08 08:59:58,831 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-02-08 08:59:58,831 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:58,831 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 86 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2025-02-08 08:59:59,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:59:59,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342271722] [2025-02-08 08:59:59,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342271722] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:59:59,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395765507] [2025-02-08 08:59:59,027 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:59:59,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:59:59,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:59:59,031 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:59:59,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 08:59:59,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 84 statements into 1 equivalence classes. [2025-02-08 08:59:59,088 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 84 of 84 statements. [2025-02-08 08:59:59,088 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:59:59,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:59:59,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:59:59,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:59:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 50 proven. 92 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2025-02-08 08:59:59,193 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:59:59,559 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 50 proven. 95 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2025-02-08 08:59:59,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395765507] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:59:59,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:59:59,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 16 [2025-02-08 08:59:59,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623249616] [2025-02-08 08:59:59,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:59:59,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:59:59,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:59:59,561 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:59:59,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:59:59,562 INFO L87 Difference]: Start difference. First operand 98 states and 159 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 10 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2025-02-08 08:59:59,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 08:59:59,740 INFO L93 Difference]: Finished difference Result 174 states and 299 transitions. [2025-02-08 08:59:59,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-02-08 08:59:59,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 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 84 [2025-02-08 08:59:59,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 08:59:59,742 INFO L225 Difference]: With dead ends: 174 [2025-02-08 08:59:59,742 INFO L226 Difference]: Without dead ends: 80 [2025-02-08 08:59:59,745 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=388, Unknown=0, NotChecked=0, Total=552 [2025-02-08 08:59:59,745 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 08:59:59,746 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 72 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 08:59:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-02-08 08:59:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2025-02-08 08:59:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 53 states have internal predecessors, (61), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (26), 12 states have call predecessors, (26), 6 states have call successors, (26) [2025-02-08 08:59:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2025-02-08 08:59:59,755 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 84 [2025-02-08 08:59:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 08:59:59,755 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2025-02-08 08:59:59,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 10 states have call successors, (14), 1 states have call predecessors, (14), 5 states have return successors, (14), 7 states have call predecessors, (14), 10 states have call successors, (14) [2025-02-08 08:59:59,756 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2025-02-08 08:59:59,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2025-02-08 08:59:59,762 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 08:59:59,762 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2025-02-08 08:59:59,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 08:59:59,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:59:59,963 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 08:59:59,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:59:59,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1677979705, now seen corresponding path program 2 times [2025-02-08 08:59:59,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:59:59,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082202172] [2025-02-08 08:59:59,964 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:59:59,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:59:59,970 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 103 statements into 2 equivalence classes. [2025-02-08 08:59:59,984 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 103 of 103 statements. [2025-02-08 08:59:59,984 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:59:59,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 47 proven. 96 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2025-02-08 09:00:00,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:00,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082202172] [2025-02-08 09:00:00,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082202172] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:00,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871377264] [2025-02-08 09:00:00,141 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:00:00,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:00,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:00,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:00,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 09:00:00,174 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 103 statements into 2 equivalence classes. [2025-02-08 09:00:00,197 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 103 of 103 statements. [2025-02-08 09:00:00,197 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:00:00,197 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:00,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 09:00:00,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 200 proven. 15 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2025-02-08 09:00:00,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 48 proven. 121 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2025-02-08 09:00:00,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871377264] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:00,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:00,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2025-02-08 09:00:00,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873400932] [2025-02-08 09:00:00,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:00,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 09:00:00,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:00,527 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 09:00:00,527 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-02-08 09:00:00,527 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-08 09:00:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:00,617 INFO L93 Difference]: Finished difference Result 129 states and 179 transitions. [2025-02-08 09:00:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 09:00:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 103 [2025-02-08 09:00:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:00,620 INFO L225 Difference]: With dead ends: 129 [2025-02-08 09:00:00,620 INFO L226 Difference]: Without dead ends: 63 [2025-02-08 09:00:00,622 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 198 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-02-08 09:00:00,623 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 42 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:00,623 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 54 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:00:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2025-02-08 09:00:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2025-02-08 09:00:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 46 states have internal predecessors, (53), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (14), 10 states have call predecessors, (14), 5 states have call successors, (14) [2025-02-08 09:00:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2025-02-08 09:00:00,637 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 103 [2025-02-08 09:00:00,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:00,637 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2025-02-08 09:00:00,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 7 states have call successors, (12), 2 states have call predecessors, (12), 5 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2025-02-08 09:00:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2025-02-08 09:00:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2025-02-08 09:00:00,641 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:00,642 INFO L218 NwaCegarLoop]: trace histogram [19, 17, 16, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 3, 1, 1, 1, 1, 1] [2025-02-08 09:00:00,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-08 09:00:00,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-02-08 09:00:00,842 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:00,843 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1390954503, now seen corresponding path program 3 times [2025-02-08 09:00:00,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:00,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541019747] [2025-02-08 09:00:00,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:00:00,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:00,856 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 178 statements into 17 equivalence classes. [2025-02-08 09:00:00,870 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 70 of 178 statements. [2025-02-08 09:00:00,870 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-08 09:00:00,872 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1063 backedges. 319 proven. 18 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2025-02-08 09:00:00,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:00,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541019747] [2025-02-08 09:00:00,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541019747] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:00,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115482317] [2025-02-08 09:00:00,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:00:00,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:00,990 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:00,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 09:00:01,037 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 178 statements into 17 equivalence classes. [2025-02-08 09:00:01,055 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 70 of 178 statements. [2025-02-08 09:00:01,056 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-02-08 09:00:01,056 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:01,057 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 09:00:01,060 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1063 backedges. 316 proven. 21 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2025-02-08 09:00:01,117 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:01,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1063 backedges. 316 proven. 22 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2025-02-08 09:00:01,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115482317] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:01,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:01,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 12 [2025-02-08 09:00:01,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332749921] [2025-02-08 09:00:01,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:01,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-08 09:00:01,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:01,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-08 09:00:01,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-02-08 09:00:01,493 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-08 09:00:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:01,596 INFO L93 Difference]: Finished difference Result 114 states and 140 transitions. [2025-02-08 09:00:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 09:00:01,597 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 178 [2025-02-08 09:00:01,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:01,598 INFO L225 Difference]: With dead ends: 114 [2025-02-08 09:00:01,598 INFO L226 Difference]: Without dead ends: 59 [2025-02-08 09:00:01,598 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 350 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-02-08 09:00:01,599 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:01,599 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 72 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:00:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-02-08 09:00:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2025-02-08 09:00:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2025-02-08 09:00:01,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2025-02-08 09:00:01,605 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 178 [2025-02-08 09:00:01,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:01,605 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2025-02-08 09:00:01,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-02-08 09:00:01,605 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2025-02-08 09:00:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2025-02-08 09:00:01,606 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:01,606 INFO L218 NwaCegarLoop]: trace histogram [10, 8, 8, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2025-02-08 09:00:01,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-02-08 09:00:01,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:01,807 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:01,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:01,808 INFO L85 PathProgramCache]: Analyzing trace with hash 497973448, now seen corresponding path program 4 times [2025-02-08 09:00:01,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:01,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615940194] [2025-02-08 09:00:01,808 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:00:01,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:01,819 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-02-08 09:00:01,834 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 90 of 90 statements. [2025-02-08 09:00:01,835 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 09:00:01,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2025-02-08 09:00:02,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:02,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615940194] [2025-02-08 09:00:02,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615940194] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:02,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116671785] [2025-02-08 09:00:02,098 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:00:02,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:02,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:02,100 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:02,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 09:00:02,132 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 90 statements into 2 equivalence classes. [2025-02-08 09:00:02,152 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 90 of 90 statements. [2025-02-08 09:00:02,153 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 09:00:02,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:02,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 09:00:02,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2025-02-08 09:00:02,216 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2025-02-08 09:00:02,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116671785] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:02,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:02,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2025-02-08 09:00:02,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495946698] [2025-02-08 09:00:02,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:02,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 09:00:02,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:02,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 09:00:02,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-02-08 09:00:02,398 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 15 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 5 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2025-02-08 09:00:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:02,466 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2025-02-08 09:00:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-02-08 09:00:02,467 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 5 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 90 [2025-02-08 09:00:02,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:02,468 INFO L225 Difference]: With dead ends: 57 [2025-02-08 09:00:02,468 INFO L226 Difference]: Without dead ends: 56 [2025-02-08 09:00:02,469 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2025-02-08 09:00:02,470 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:02,470 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 152 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-02-08 09:00:02,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2025-02-08 09:00:02,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2025-02-08 09:00:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2025-02-08 09:00:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2025-02-08 09:00:02,480 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 90 [2025-02-08 09:00:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:02,481 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2025-02-08 09:00:02,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.5) internal successors, (49), 15 states have internal predecessors, (49), 5 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2025-02-08 09:00:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2025-02-08 09:00:02,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2025-02-08 09:00:02,482 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:02,483 INFO L218 NwaCegarLoop]: trace histogram [12, 10, 10, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1] [2025-02-08 09:00:02,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-02-08 09:00:02,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:02,687 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:02,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash -637930361, now seen corresponding path program 2 times [2025-02-08 09:00:02,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:02,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247731393] [2025-02-08 09:00:02,688 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:00:02,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:02,694 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 111 statements into 2 equivalence classes. [2025-02-08 09:00:02,713 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 111 of 111 statements. [2025-02-08 09:00:02,713 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:00:02,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 94 proven. 159 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2025-02-08 09:00:02,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247731393] [2025-02-08 09:00:02,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247731393] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:02,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560756892] [2025-02-08 09:00:02,944 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:00:02,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:02,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:02,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:02,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 09:00:02,980 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 111 statements into 2 equivalence classes. [2025-02-08 09:00:03,005 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 111 of 111 statements. [2025-02-08 09:00:03,005 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:00:03,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:03,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 09:00:03,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 106 proven. 158 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2025-02-08 09:00:03,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 106 proven. 174 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2025-02-08 09:00:03,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560756892] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:03,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:03,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2025-02-08 09:00:03,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302823049] [2025-02-08 09:00:03,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:03,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 09:00:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:03,725 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 09:00:03,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-02-08 09:00:03,726 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 13 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-02-08 09:00:03,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:03,982 INFO L93 Difference]: Finished difference Result 121 states and 147 transitions. [2025-02-08 09:00:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-08 09:00:03,982 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 13 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) Word has length 111 [2025-02-08 09:00:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:03,983 INFO L225 Difference]: With dead ends: 121 [2025-02-08 09:00:03,983 INFO L226 Difference]: Without dead ends: 71 [2025-02-08 09:00:03,984 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 214 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2025-02-08 09:00:03,985 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 104 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:03,985 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 90 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:00:03,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2025-02-08 09:00:03,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2025-02-08 09:00:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 48 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2025-02-08 09:00:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2025-02-08 09:00:03,993 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 111 [2025-02-08 09:00:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:03,993 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2025-02-08 09:00:03,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 13 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-02-08 09:00:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2025-02-08 09:00:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-02-08 09:00:03,994 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:03,994 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1] [2025-02-08 09:00:04,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-08 09:00:04,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:04,196 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:04,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1502726788, now seen corresponding path program 3 times [2025-02-08 09:00:04,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:04,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711109906] [2025-02-08 09:00:04,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:00:04,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:04,204 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 124 statements into 9 equivalence classes. [2025-02-08 09:00:04,220 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 116 of 124 statements. [2025-02-08 09:00:04,221 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-08 09:00:04,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 197 proven. 83 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2025-02-08 09:00:04,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:04,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711109906] [2025-02-08 09:00:04,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711109906] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:04,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511486200] [2025-02-08 09:00:04,409 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:00:04,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:04,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:04,411 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:04,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 09:00:04,450 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 124 statements into 9 equivalence classes. [2025-02-08 09:00:04,478 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) and asserted 116 of 124 statements. [2025-02-08 09:00:04,479 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2025-02-08 09:00:04,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:04,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-08 09:00:04,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 203 proven. 97 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2025-02-08 09:00:04,574 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 203 proven. 106 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2025-02-08 09:00:05,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511486200] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:05,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:05,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 13] total 18 [2025-02-08 09:00:05,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464890510] [2025-02-08 09:00:05,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:05,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 09:00:05,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:05,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 09:00:05,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-02-08 09:00:05,087 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2025-02-08 09:00:05,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:05,269 INFO L93 Difference]: Finished difference Result 125 states and 146 transitions. [2025-02-08 09:00:05,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-08 09:00:05,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) Word has length 124 [2025-02-08 09:00:05,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:05,271 INFO L225 Difference]: With dead ends: 125 [2025-02-08 09:00:05,271 INFO L226 Difference]: Without dead ends: 69 [2025-02-08 09:00:05,271 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 238 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2025-02-08 09:00:05,272 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:05,272 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 103 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:00:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2025-02-08 09:00:05,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2025-02-08 09:00:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 50 states have internal predecessors, (56), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2025-02-08 09:00:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2025-02-08 09:00:05,292 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 124 [2025-02-08 09:00:05,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:05,292 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2025-02-08 09:00:05,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 10 states have call successors, (15), 1 states have call predecessors, (15), 6 states have return successors, (16), 9 states have call predecessors, (16), 10 states have call successors, (16) [2025-02-08 09:00:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2025-02-08 09:00:05,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2025-02-08 09:00:05,295 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:05,295 INFO L218 NwaCegarLoop]: trace histogram [30, 27, 24, 15, 15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 13, 12, 9, 6, 1, 1, 1, 1, 1] [2025-02-08 09:00:05,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-02-08 09:00:05,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-02-08 09:00:05,496 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:05,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:05,497 INFO L85 PathProgramCache]: Analyzing trace with hash 825572441, now seen corresponding path program 4 times [2025-02-08 09:00:05,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:05,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342259257] [2025-02-08 09:00:05,497 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:00:05,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:05,508 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 282 statements into 2 equivalence classes. [2025-02-08 09:00:05,518 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 169 of 282 statements. [2025-02-08 09:00:05,518 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:00:05,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 294 proven. 818 refuted. 0 times theorem prover too weak. 1649 trivial. 0 not checked. [2025-02-08 09:00:05,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:05,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342259257] [2025-02-08 09:00:05,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342259257] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:05,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175196238] [2025-02-08 09:00:05,730 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:00:05,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:05,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:05,732 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:05,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 09:00:05,799 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 282 statements into 2 equivalence classes. [2025-02-08 09:00:05,835 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 169 of 282 statements. [2025-02-08 09:00:05,835 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:00:05,835 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:05,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 09:00:05,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 1508 proven. 533 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2025-02-08 09:00:05,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2761 backedges. 327 proven. 1108 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2025-02-08 09:00:06,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175196238] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:06,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:06,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 18] total 23 [2025-02-08 09:00:06,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035294019] [2025-02-08 09:00:06,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:06,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 09:00:06,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:06,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 09:00:06,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2025-02-08 09:00:06,955 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 23 states, 23 states have (on average 6.043478260869565) internal successors, (139), 23 states have internal predecessors, (139), 18 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (28), 11 states have call predecessors, (28), 17 states have call successors, (28) [2025-02-08 09:00:07,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:07,283 INFO L93 Difference]: Finished difference Result 151 states and 182 transitions. [2025-02-08 09:00:07,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-08 09:00:07,284 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.043478260869565) internal successors, (139), 23 states have internal predecessors, (139), 18 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (28), 11 states have call predecessors, (28), 17 states have call successors, (28) Word has length 282 [2025-02-08 09:00:07,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:07,285 INFO L225 Difference]: With dead ends: 151 [2025-02-08 09:00:07,285 INFO L226 Difference]: Without dead ends: 92 [2025-02-08 09:00:07,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 550 SyntacticMatches, 10 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=411, Invalid=1071, Unknown=0, NotChecked=0, Total=1482 [2025-02-08 09:00:07,287 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 196 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:07,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 105 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:00:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2025-02-08 09:00:07,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2025-02-08 09:00:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 60 states have internal predecessors, (65), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2025-02-08 09:00:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2025-02-08 09:00:07,293 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 282 [2025-02-08 09:00:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:07,294 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2025-02-08 09:00:07,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.043478260869565) internal successors, (139), 23 states have internal predecessors, (139), 18 states have call successors, (25), 3 states have call predecessors, (25), 9 states have return successors, (28), 11 states have call predecessors, (28), 17 states have call successors, (28) [2025-02-08 09:00:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2025-02-08 09:00:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2025-02-08 09:00:07,295 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:07,295 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 12, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 1, 1, 1, 1, 1] [2025-02-08 09:00:07,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-08 09:00:07,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-08 09:00:07,500 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:07,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1936598118, now seen corresponding path program 5 times [2025-02-08 09:00:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:07,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377880995] [2025-02-08 09:00:07,501 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:00:07,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:07,508 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 144 statements into 12 equivalence classes. [2025-02-08 09:00:07,519 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 144 of 144 statements. [2025-02-08 09:00:07,519 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-08 09:00:07,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 97 proven. 183 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2025-02-08 09:00:08,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:08,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377880995] [2025-02-08 09:00:08,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377880995] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:08,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068073385] [2025-02-08 09:00:08,011 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:00:08,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:08,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:08,013 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:08,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-08 09:00:08,059 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 144 statements into 12 equivalence classes. [2025-02-08 09:00:08,094 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) and asserted 144 of 144 statements. [2025-02-08 09:00:08,095 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2025-02-08 09:00:08,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:08,096 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 09:00:08,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:08,273 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2025-02-08 09:00:08,274 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:09,427 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2025-02-08 09:00:09,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068073385] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:09,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:09,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 17] total 32 [2025-02-08 09:00:09,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368078499] [2025-02-08 09:00:09,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:09,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-02-08 09:00:09,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:09,429 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-02-08 09:00:09,429 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2025-02-08 09:00:09,429 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 33 states, 32 states have (on average 2.75) internal successors, (88), 33 states have internal predecessors, (88), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (23), 22 states have call predecessors, (23), 8 states have call successors, (23) [2025-02-08 09:00:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:09,593 INFO L93 Difference]: Finished difference Result 108 states and 136 transitions. [2025-02-08 09:00:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-02-08 09:00:09,594 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 33 states have internal predecessors, (88), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (23), 22 states have call predecessors, (23), 8 states have call successors, (23) Word has length 144 [2025-02-08 09:00:09,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:09,595 INFO L225 Difference]: With dead ends: 108 [2025-02-08 09:00:09,595 INFO L226 Difference]: Without dead ends: 107 [2025-02-08 09:00:09,596 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 270 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2025-02-08 09:00:09,597 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:09,597 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 209 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:00:09,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2025-02-08 09:00:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 98. [2025-02-08 09:00:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 76 states have internal predecessors, (82), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (28), 14 states have call predecessors, (28), 10 states have call successors, (28) [2025-02-08 09:00:09,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2025-02-08 09:00:09,605 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 144 [2025-02-08 09:00:09,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:09,605 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2025-02-08 09:00:09,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.75) internal successors, (88), 33 states have internal predecessors, (88), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (23), 22 states have call predecessors, (23), 8 states have call successors, (23) [2025-02-08 09:00:09,606 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2025-02-08 09:00:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2025-02-08 09:00:09,608 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:09,608 INFO L218 NwaCegarLoop]: trace histogram [32, 30, 26, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 6, 1, 1, 1, 1, 1] [2025-02-08 09:00:09,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-02-08 09:00:09,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:09,813 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:09,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:09,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1145140389, now seen corresponding path program 6 times [2025-02-08 09:00:09,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:09,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95330348] [2025-02-08 09:00:09,814 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:00:09,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:09,825 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 307 statements into 24 equivalence classes. [2025-02-08 09:00:09,857 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) and asserted 289 of 307 statements. [2025-02-08 09:00:09,858 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2025-02-08 09:00:09,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 451 proven. 852 refuted. 0 times theorem prover too weak. 1979 trivial. 0 not checked. [2025-02-08 09:00:11,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:11,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95330348] [2025-02-08 09:00:11,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95330348] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:11,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363937698] [2025-02-08 09:00:11,174 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:00:11,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:11,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:11,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:11,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 09:00:11,242 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 307 statements into 24 equivalence classes. [2025-02-08 09:00:11,314 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) and asserted 289 of 307 statements. [2025-02-08 09:00:11,314 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2025-02-08 09:00:11,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:11,316 INFO L256 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-02-08 09:00:11,320 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 425 proven. 637 refuted. 0 times theorem prover too weak. 2220 trivial. 0 not checked. [2025-02-08 09:00:11,627 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 663 proven. 567 refuted. 0 times theorem prover too weak. 2052 trivial. 0 not checked. [2025-02-08 09:00:14,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363937698] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:14,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:14,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 26] total 39 [2025-02-08 09:00:14,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128409965] [2025-02-08 09:00:14,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:14,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2025-02-08 09:00:14,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:14,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2025-02-08 09:00:14,941 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1195, Unknown=0, NotChecked=0, Total=1560 [2025-02-08 09:00:14,941 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 40 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 40 states have internal predecessors, (105), 10 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (27), 27 states have call predecessors, (27), 10 states have call successors, (27) [2025-02-08 09:00:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:15,224 INFO L93 Difference]: Finished difference Result 156 states and 223 transitions. [2025-02-08 09:00:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-08 09:00:15,225 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 40 states have internal predecessors, (105), 10 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (27), 27 states have call predecessors, (27), 10 states have call successors, (27) Word has length 307 [2025-02-08 09:00:15,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:15,228 INFO L225 Difference]: With dead ends: 156 [2025-02-08 09:00:15,228 INFO L226 Difference]: Without dead ends: 155 [2025-02-08 09:00:15,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 598 SyntacticMatches, 37 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=517, Invalid=1739, Unknown=0, NotChecked=0, Total=2256 [2025-02-08 09:00:15,230 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:15,230 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 242 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:00:15,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2025-02-08 09:00:15,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 116. [2025-02-08 09:00:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 90 states have internal predecessors, (96), 13 states have call successors, (13), 7 states have call predecessors, (13), 10 states have return successors, (50), 18 states have call predecessors, (50), 12 states have call successors, (50) [2025-02-08 09:00:15,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 159 transitions. [2025-02-08 09:00:15,246 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 159 transitions. Word has length 307 [2025-02-08 09:00:15,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:15,246 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 159 transitions. [2025-02-08 09:00:15,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.6923076923076925) internal successors, (105), 40 states have internal predecessors, (105), 10 states have call successors, (11), 1 states have call predecessors, (11), 11 states have return successors, (27), 27 states have call predecessors, (27), 10 states have call successors, (27) [2025-02-08 09:00:15,247 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 159 transitions. [2025-02-08 09:00:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 622 [2025-02-08 09:00:15,256 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:15,256 INFO L218 NwaCegarLoop]: trace histogram [64, 62, 52, 32, 32, 32, 32, 31, 31, 31, 31, 31, 31, 31, 31, 30, 20, 12, 1, 1, 1, 1, 1] [2025-02-08 09:00:15,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-08 09:00:15,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:15,457 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:15,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:15,458 INFO L85 PathProgramCache]: Analyzing trace with hash 612343709, now seen corresponding path program 7 times [2025-02-08 09:00:15,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:15,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354049634] [2025-02-08 09:00:15,458 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:00:15,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:15,475 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 621 statements into 1 equivalence classes. [2025-02-08 09:00:15,521 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 621 of 621 statements. [2025-02-08 09:00:15,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:00:15,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13883 backedges. 768 proven. 3037 refuted. 0 times theorem prover too weak. 10078 trivial. 0 not checked. [2025-02-08 09:00:16,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354049634] [2025-02-08 09:00:16,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354049634] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40571715] [2025-02-08 09:00:16,229 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:00:16,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:16,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:16,231 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:16,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-08 09:00:16,376 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 621 statements into 1 equivalence classes. [2025-02-08 09:00:16,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 621 of 621 statements. [2025-02-08 09:00:16,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:00:16,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:16,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-08 09:00:16,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:16,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13883 backedges. 883 proven. 3739 refuted. 0 times theorem prover too weak. 9261 trivial. 0 not checked. [2025-02-08 09:00:16,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:18,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13883 backedges. 883 proven. 3811 refuted. 0 times theorem prover too weak. 9189 trivial. 0 not checked. [2025-02-08 09:00:18,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40571715] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:18,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:18,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-02-08 09:00:18,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537107971] [2025-02-08 09:00:18,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:18,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-02-08 09:00:18,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:18,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-02-08 09:00:18,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-02-08 09:00:18,598 INFO L87 Difference]: Start difference. First operand 116 states and 159 transitions. Second operand has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 22 states have call successors, (34) [2025-02-08 09:00:19,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:19,040 INFO L93 Difference]: Finished difference Result 293 states and 475 transitions. [2025-02-08 09:00:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 09:00:19,041 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 22 states have call successors, (34) Word has length 621 [2025-02-08 09:00:19,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:19,042 INFO L225 Difference]: With dead ends: 293 [2025-02-08 09:00:19,042 INFO L226 Difference]: Without dead ends: 183 [2025-02-08 09:00:19,045 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1285 GetRequests, 1227 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2025-02-08 09:00:19,045 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 349 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:19,046 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 187 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:00:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2025-02-08 09:00:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2025-02-08 09:00:19,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 134 states have (on average 1.037313432835821) internal successors, (139), 130 states have internal predecessors, (139), 19 states have call successors, (19), 11 states have call predecessors, (19), 13 states have return successors, (73), 25 states have call predecessors, (73), 18 states have call successors, (73) [2025-02-08 09:00:19,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 231 transitions. [2025-02-08 09:00:19,078 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 231 transitions. Word has length 621 [2025-02-08 09:00:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:19,081 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 231 transitions. [2025-02-08 09:00:19,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.642857142857143) internal successors, (158), 28 states have internal predecessors, (158), 22 states have call successors, (27), 1 states have call predecessors, (27), 11 states have return successors, (34), 14 states have call predecessors, (34), 22 states have call successors, (34) [2025-02-08 09:00:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 231 transitions. [2025-02-08 09:00:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2025-02-08 09:00:19,090 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:19,090 INFO L218 NwaCegarLoop]: trace histogram [57, 56, 46, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 27, 18, 11, 1, 1, 1, 1, 1] [2025-02-08 09:00:19,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-02-08 09:00:19,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-02-08 09:00:19,295 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:19,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:19,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1168590032, now seen corresponding path program 8 times [2025-02-08 09:00:19,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:19,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719787749] [2025-02-08 09:00:19,296 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:00:19,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:19,311 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 556 statements into 2 equivalence classes. [2025-02-08 09:00:19,351 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 556 of 556 statements. [2025-02-08 09:00:19,351 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:00:19,351 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:19,882 INFO L134 CoverageAnalysis]: Checked inductivity of 11087 backedges. 743 proven. 2691 refuted. 0 times theorem prover too weak. 7653 trivial. 0 not checked. [2025-02-08 09:00:19,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:19,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719787749] [2025-02-08 09:00:19,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719787749] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:19,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150134411] [2025-02-08 09:00:19,883 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:00:19,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:19,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:19,885 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:19,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-08 09:00:20,026 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 556 statements into 2 equivalence classes. [2025-02-08 09:00:20,135 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 556 of 556 statements. [2025-02-08 09:00:20,135 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:00:20,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:20,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 09:00:20,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11087 backedges. 5731 proven. 484 refuted. 0 times theorem prover too weak. 4872 trivial. 0 not checked. [2025-02-08 09:00:20,263 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11087 backedges. 740 proven. 2897 refuted. 0 times theorem prover too weak. 7450 trivial. 0 not checked. [2025-02-08 09:00:21,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150134411] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:21,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:21,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-02-08 09:00:21,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146897571] [2025-02-08 09:00:21,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:21,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 09:00:21,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:21,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 09:00:21,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2025-02-08 09:00:21,954 INFO L87 Difference]: Start difference. First operand 167 states and 231 transitions. Second operand has 24 states, 24 states have (on average 5.625) internal successors, (135), 24 states have internal predecessors, (135), 18 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) [2025-02-08 09:00:22,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:22,207 INFO L93 Difference]: Finished difference Result 298 states and 445 transitions. [2025-02-08 09:00:22,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-02-08 09:00:22,208 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.625) internal successors, (135), 24 states have internal predecessors, (135), 18 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) Word has length 556 [2025-02-08 09:00:22,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:22,210 INFO L225 Difference]: With dead ends: 298 [2025-02-08 09:00:22,210 INFO L226 Difference]: Without dead ends: 137 [2025-02-08 09:00:22,212 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1099 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2025-02-08 09:00:22,212 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 87 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:22,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 180 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:00:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2025-02-08 09:00:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 125. [2025-02-08 09:00:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 100 states have (on average 1.03) internal successors, (103), 98 states have internal predecessors, (103), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (44), 16 states have call predecessors, (44), 14 states have call successors, (44) [2025-02-08 09:00:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 162 transitions. [2025-02-08 09:00:22,224 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 162 transitions. Word has length 556 [2025-02-08 09:00:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:22,224 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 162 transitions. [2025-02-08 09:00:22,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.625) internal successors, (135), 24 states have internal predecessors, (135), 18 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) [2025-02-08 09:00:22,224 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 162 transitions. [2025-02-08 09:00:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2025-02-08 09:00:22,226 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:22,227 INFO L218 NwaCegarLoop]: trace histogram [52, 50, 42, 26, 26, 26, 26, 25, 25, 25, 25, 25, 25, 25, 25, 24, 16, 10, 1, 1, 1, 1, 1] [2025-02-08 09:00:22,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-08 09:00:22,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 09:00:22,427 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:22,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:22,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1280477149, now seen corresponding path program 9 times [2025-02-08 09:00:22,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:22,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592551043] [2025-02-08 09:00:22,428 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:00:22,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:22,442 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 503 statements into 35 equivalence classes. [2025-02-08 09:00:22,482 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 372 of 503 statements. [2025-02-08 09:00:22,482 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-02-08 09:00:22,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1679 proven. 1009 refuted. 0 times theorem prover too weak. 6350 trivial. 0 not checked. [2025-02-08 09:00:22,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:22,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592551043] [2025-02-08 09:00:22,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592551043] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:22,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087905303] [2025-02-08 09:00:22,896 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 09:00:22,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:22,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:22,898 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:22,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-08 09:00:23,051 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 503 statements into 35 equivalence classes. [2025-02-08 09:00:23,126 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 372 of 503 statements. [2025-02-08 09:00:23,126 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-02-08 09:00:23,126 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:23,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 09:00:23,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1771 proven. 1024 refuted. 0 times theorem prover too weak. 6243 trivial. 0 not checked. [2025-02-08 09:00:23,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9038 backedges. 1779 proven. 1063 refuted. 0 times theorem prover too weak. 6196 trivial. 0 not checked. [2025-02-08 09:00:24,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087905303] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:24,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:24,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-02-08 09:00:24,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099499247] [2025-02-08 09:00:24,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:24,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 09:00:24,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:24,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 09:00:24,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2025-02-08 09:00:24,415 INFO L87 Difference]: Start difference. First operand 125 states and 162 transitions. Second operand has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 13 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) [2025-02-08 09:00:24,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:24,920 INFO L93 Difference]: Finished difference Result 337 states and 454 transitions. [2025-02-08 09:00:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-02-08 09:00:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 13 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) Word has length 503 [2025-02-08 09:00:24,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:24,923 INFO L225 Difference]: With dead ends: 337 [2025-02-08 09:00:24,924 INFO L226 Difference]: Without dead ends: 192 [2025-02-08 09:00:24,925 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 997 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=633, Invalid=1719, Unknown=0, NotChecked=0, Total=2352 [2025-02-08 09:00:24,926 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 200 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:24,926 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 148 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-02-08 09:00:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2025-02-08 09:00:24,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 158. [2025-02-08 09:00:24,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 128 states have (on average 1.0390625) internal successors, (133), 124 states have internal predecessors, (133), 19 states have call successors, (19), 14 states have call predecessors, (19), 10 states have return successors, (50), 19 states have call predecessors, (50), 18 states have call successors, (50) [2025-02-08 09:00:24,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 202 transitions. [2025-02-08 09:00:24,940 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 202 transitions. Word has length 503 [2025-02-08 09:00:24,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:24,941 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 202 transitions. [2025-02-08 09:00:24,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.416666666666667) internal successors, (130), 24 states have internal predecessors, (130), 13 states have call successors, (22), 1 states have call predecessors, (22), 9 states have return successors, (26), 16 states have call predecessors, (26), 13 states have call successors, (26) [2025-02-08 09:00:24,941 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 202 transitions. [2025-02-08 09:00:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2025-02-08 09:00:24,944 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:24,944 INFO L218 NwaCegarLoop]: trace histogram [61, 60, 49, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 29, 19, 12, 1, 1, 1, 1, 1] [2025-02-08 09:00:24,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-08 09:00:25,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:25,145 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:25,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash 165134557, now seen corresponding path program 10 times [2025-02-08 09:00:25,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:25,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155304046] [2025-02-08 09:00:25,146 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:00:25,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:25,162 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 595 statements into 2 equivalence classes. [2025-02-08 09:00:25,180 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 353 of 595 statements. [2025-02-08 09:00:25,180 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:00:25,180 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:25,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12726 backedges. 2101 proven. 2298 refuted. 0 times theorem prover too weak. 8327 trivial. 0 not checked. [2025-02-08 09:00:25,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155304046] [2025-02-08 09:00:25,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155304046] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:25,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240907444] [2025-02-08 09:00:25,590 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 09:00:25,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:25,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:25,592 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:25,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-08 09:00:25,736 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 595 statements into 2 equivalence classes. [2025-02-08 09:00:25,811 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 353 of 595 statements. [2025-02-08 09:00:25,811 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 09:00:25,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:25,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-08 09:00:25,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:25,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12726 backedges. 7193 proven. 1214 refuted. 0 times theorem prover too weak. 4319 trivial. 0 not checked. [2025-02-08 09:00:25,961 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12726 backedges. 1391 proven. 3328 refuted. 0 times theorem prover too weak. 8007 trivial. 0 not checked. [2025-02-08 09:00:28,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240907444] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:28,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:28,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 23] total 31 [2025-02-08 09:00:28,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811388988] [2025-02-08 09:00:28,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:28,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2025-02-08 09:00:28,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:28,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2025-02-08 09:00:28,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2025-02-08 09:00:28,314 INFO L87 Difference]: Start difference. First operand 158 states and 202 transitions. Second operand has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 24 states have call successors, (30), 2 states have call predecessors, (30), 14 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) [2025-02-08 09:00:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:28,785 INFO L93 Difference]: Finished difference Result 324 states and 444 transitions. [2025-02-08 09:00:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 09:00:28,786 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 24 states have call successors, (30), 2 states have call predecessors, (30), 14 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) Word has length 595 [2025-02-08 09:00:28,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:28,788 INFO L225 Difference]: With dead ends: 324 [2025-02-08 09:00:28,788 INFO L226 Difference]: Without dead ends: 172 [2025-02-08 09:00:28,790 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1232 GetRequests, 1174 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=592, Invalid=1760, Unknown=0, NotChecked=0, Total=2352 [2025-02-08 09:00:28,791 INFO L435 NwaCegarLoop]: 56 mSDtfsCounter, 190 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:28,791 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 320 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 09:00:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2025-02-08 09:00:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 155. [2025-02-08 09:00:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 123 states have internal predecessors, (130), 20 states have call successors, (20), 17 states have call predecessors, (20), 8 states have return successors, (40), 14 states have call predecessors, (40), 19 states have call successors, (40) [2025-02-08 09:00:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 190 transitions. [2025-02-08 09:00:28,802 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 190 transitions. Word has length 595 [2025-02-08 09:00:28,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:28,802 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 190 transitions. [2025-02-08 09:00:28,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.67741935483871) internal successors, (176), 31 states have internal predecessors, (176), 24 states have call successors, (30), 2 states have call predecessors, (30), 14 states have return successors, (40), 16 states have call predecessors, (40), 24 states have call successors, (40) [2025-02-08 09:00:28,803 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 190 transitions. [2025-02-08 09:00:28,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1237 [2025-02-08 09:00:28,811 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:28,812 INFO L218 NwaCegarLoop]: trace histogram [128, 123, 104, 65, 65, 65, 65, 62, 62, 62, 62, 62, 61, 61, 61, 60, 39, 24, 1, 1, 1, 1, 1] [2025-02-08 09:00:28,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-08 09:00:29,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:29,012 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:29,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:29,013 INFO L85 PathProgramCache]: Analyzing trace with hash 473183295, now seen corresponding path program 11 times [2025-02-08 09:00:29,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:29,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140421649] [2025-02-08 09:00:29,013 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:00:29,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:29,035 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1236 statements into 98 equivalence classes. [2025-02-08 09:00:29,145 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) and asserted 846 of 1236 statements. [2025-02-08 09:00:29,145 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2025-02-08 09:00:29,145 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 55912 backedges. 7417 proven. 5388 refuted. 0 times theorem prover too weak. 43107 trivial. 0 not checked. [2025-02-08 09:00:30,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:30,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140421649] [2025-02-08 09:00:30,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140421649] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:30,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646778112] [2025-02-08 09:00:30,505 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 09:00:30,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:30,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:30,508 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:30,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-08 09:00:30,705 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 1236 statements into 98 equivalence classes. [2025-02-08 09:00:30,902 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) and asserted 846 of 1236 statements. [2025-02-08 09:00:30,902 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 70 check-sat command(s) [2025-02-08 09:00:30,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:30,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-02-08 09:00:30,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 55912 backedges. 7388 proven. 5392 refuted. 0 times theorem prover too weak. 43132 trivial. 0 not checked. [2025-02-08 09:00:31,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 55912 backedges. 7383 proven. 5539 refuted. 0 times theorem prover too weak. 42990 trivial. 0 not checked. [2025-02-08 09:00:34,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646778112] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:34,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:34,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 30] total 37 [2025-02-08 09:00:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409482590] [2025-02-08 09:00:34,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:34,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-08 09:00:34,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:34,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-08 09:00:34,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2025-02-08 09:00:34,804 INFO L87 Difference]: Start difference. First operand 155 states and 190 transitions. Second operand has 37 states, 37 states have (on average 5.324324324324325) internal successors, (197), 37 states have internal predecessors, (197), 29 states have call successors, (33), 1 states have call predecessors, (33), 14 states have return successors, (42), 16 states have call predecessors, (42), 29 states have call successors, (42) [2025-02-08 09:00:35,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:35,414 INFO L93 Difference]: Finished difference Result 349 states and 462 transitions. [2025-02-08 09:00:35,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-02-08 09:00:35,414 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.324324324324325) internal successors, (197), 37 states have internal predecessors, (197), 29 states have call successors, (33), 1 states have call predecessors, (33), 14 states have return successors, (42), 16 states have call predecessors, (42), 29 states have call successors, (42) Word has length 1236 [2025-02-08 09:00:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:35,416 INFO L225 Difference]: With dead ends: 349 [2025-02-08 09:00:35,416 INFO L226 Difference]: Without dead ends: 200 [2025-02-08 09:00:35,419 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2532 GetRequests, 2454 SyntacticMatches, 14 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1060, Invalid=3230, Unknown=0, NotChecked=0, Total=4290 [2025-02-08 09:00:35,419 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 544 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:35,419 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 220 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 09:00:35,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2025-02-08 09:00:35,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 146. [2025-02-08 09:00:35,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 116 states have internal predecessors, (120), 19 states have call successors, (19), 14 states have call predecessors, (19), 9 states have return successors, (45), 15 states have call predecessors, (45), 18 states have call successors, (45) [2025-02-08 09:00:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2025-02-08 09:00:35,432 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 1236 [2025-02-08 09:00:35,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:35,433 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2025-02-08 09:00:35,433 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.324324324324325) internal successors, (197), 37 states have internal predecessors, (197), 29 states have call successors, (33), 1 states have call predecessors, (33), 14 states have return successors, (42), 16 states have call predecessors, (42), 29 states have call successors, (42) [2025-02-08 09:00:35,433 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2025-02-08 09:00:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2025-02-08 09:00:35,436 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:35,437 INFO L218 NwaCegarLoop]: trace histogram [68, 66, 55, 34, 34, 34, 34, 33, 33, 33, 33, 33, 33, 33, 33, 32, 21, 13, 1, 1, 1, 1, 1] [2025-02-08 09:00:35,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-08 09:00:35,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:35,637 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:35,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:35,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1992081320, now seen corresponding path program 12 times [2025-02-08 09:00:35,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:35,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846463010] [2025-02-08 09:00:35,638 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:00:35,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:35,654 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 660 statements into 47 equivalence classes. [2025-02-08 09:00:35,757 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) and asserted 660 of 660 statements. [2025-02-08 09:00:35,757 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2025-02-08 09:00:35,757 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:40,022 INFO L134 CoverageAnalysis]: Checked inductivity of 15710 backedges. 2594 proven. 3833 refuted. 0 times theorem prover too weak. 9283 trivial. 0 not checked. [2025-02-08 09:00:40,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:00:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846463010] [2025-02-08 09:00:40,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846463010] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:00:40,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062160816] [2025-02-08 09:00:40,022 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 09:00:40,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:40,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:00:40,024 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:00:40,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-08 09:00:40,208 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 660 statements into 47 equivalence classes. [2025-02-08 09:00:40,403 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) and asserted 660 of 660 statements. [2025-02-08 09:00:40,403 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2025-02-08 09:00:40,403 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:00:40,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 133 conjuncts are in the unsatisfiable core [2025-02-08 09:00:40,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:00:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15710 backedges. 2390 proven. 2978 refuted. 0 times theorem prover too weak. 10342 trivial. 0 not checked. [2025-02-08 09:00:40,989 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:00:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 15710 backedges. 3029 proven. 2753 refuted. 0 times theorem prover too weak. 9928 trivial. 0 not checked. [2025-02-08 09:00:56,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062160816] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:00:56,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:00:56,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 35] total 53 [2025-02-08 09:00:56,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491190555] [2025-02-08 09:00:56,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:00:56,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2025-02-08 09:00:56,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:00:56,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2025-02-08 09:00:56,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=2219, Unknown=0, NotChecked=0, Total=2862 [2025-02-08 09:00:56,357 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 54 states, 53 states have (on average 2.6226415094339623) internal successors, (139), 54 states have internal predecessors, (139), 14 states have call successors, (15), 1 states have call predecessors, (15), 15 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) [2025-02-08 09:00:56,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:00:56,554 INFO L93 Difference]: Finished difference Result 177 states and 240 transitions. [2025-02-08 09:00:56,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-08 09:00:56,555 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.6226415094339623) internal successors, (139), 54 states have internal predecessors, (139), 14 states have call successors, (15), 1 states have call predecessors, (15), 15 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) Word has length 660 [2025-02-08 09:00:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:00:56,557 INFO L225 Difference]: With dead ends: 177 [2025-02-08 09:00:56,557 INFO L226 Difference]: Without dead ends: 176 [2025-02-08 09:00:56,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1455 GetRequests, 1300 SyntacticMatches, 99 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4847 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=737, Invalid=2569, Unknown=0, NotChecked=0, Total=3306 [2025-02-08 09:00:56,560 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 20 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-02-08 09:00:56,560 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 210 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-02-08 09:00:56,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2025-02-08 09:00:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 167. [2025-02-08 09:00:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 132 states have internal predecessors, (137), 21 states have call successors, (21), 14 states have call predecessors, (21), 11 states have return successors, (67), 20 states have call predecessors, (67), 20 states have call successors, (67) [2025-02-08 09:00:56,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2025-02-08 09:00:56,574 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 225 transitions. Word has length 660 [2025-02-08 09:00:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:00:56,574 INFO L471 AbstractCegarLoop]: Abstraction has 167 states and 225 transitions. [2025-02-08 09:00:56,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.6226415094339623) internal successors, (139), 54 states have internal predecessors, (139), 14 states have call successors, (15), 1 states have call predecessors, (15), 15 states have return successors, (37), 37 states have call predecessors, (37), 14 states have call successors, (37) [2025-02-08 09:00:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 225 transitions. [2025-02-08 09:00:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2014 [2025-02-08 09:00:56,595 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:00:56,596 INFO L218 NwaCegarLoop]: trace histogram [208, 201, 169, 106, 106, 106, 106, 101, 101, 101, 101, 101, 100, 100, 100, 99, 63, 39, 1, 1, 1, 1, 1] [2025-02-08 09:00:56,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-02-08 09:00:56,799 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:00:56,800 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:00:56,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:00:56,801 INFO L85 PathProgramCache]: Analyzing trace with hash -902474432, now seen corresponding path program 13 times [2025-02-08 09:00:56,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:00:56,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576111200] [2025-02-08 09:00:56,802 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:00:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:00:56,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2013 statements into 1 equivalence classes. [2025-02-08 09:00:56,960 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2013 of 2013 statements. [2025-02-08 09:00:56,961 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:00:56,961 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:01:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 149197 backedges. 3984 proven. 15764 refuted. 0 times theorem prover too weak. 129449 trivial. 0 not checked. [2025-02-08 09:01:00,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:01:00,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576111200] [2025-02-08 09:01:00,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576111200] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:01:00,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839336027] [2025-02-08 09:01:00,250 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 09:01:00,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:01:00,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:01:00,253 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:01:00,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-08 09:01:00,681 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2013 statements into 1 equivalence classes. [2025-02-08 09:01:00,975 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2013 of 2013 statements. [2025-02-08 09:01:00,975 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 09:01:00,975 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:01:00,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 3734 conjuncts, 34 conjuncts are in the unsatisfiable core [2025-02-08 09:01:01,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:01:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 149197 backedges. 70273 proven. 10486 refuted. 0 times theorem prover too weak. 68438 trivial. 0 not checked. [2025-02-08 09:01:01,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 09:01:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 149197 backedges. 4707 proven. 18416 refuted. 0 times theorem prover too weak. 126074 trivial. 0 not checked. [2025-02-08 09:01:05,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839336027] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 09:01:05,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 09:01:05,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 30] total 35 [2025-02-08 09:01:05,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608169875] [2025-02-08 09:01:05,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 09:01:05,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2025-02-08 09:01:05,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 09:01:05,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2025-02-08 09:01:05,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2025-02-08 09:01:05,487 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. Second operand has 35 states, 35 states have (on average 5.914285714285715) internal successors, (207), 35 states have internal predecessors, (207), 30 states have call successors, (37), 7 states have call predecessors, (37), 13 states have return successors, (40), 15 states have call predecessors, (40), 25 states have call successors, (40) [2025-02-08 09:01:06,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-02-08 09:01:06,240 INFO L93 Difference]: Finished difference Result 386 states and 574 transitions. [2025-02-08 09:01:06,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-02-08 09:01:06,241 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.914285714285715) internal successors, (207), 35 states have internal predecessors, (207), 30 states have call successors, (37), 7 states have call predecessors, (37), 13 states have return successors, (40), 15 states have call predecessors, (40), 25 states have call successors, (40) Word has length 2013 [2025-02-08 09:01:06,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-02-08 09:01:06,244 INFO L225 Difference]: With dead ends: 386 [2025-02-08 09:01:06,244 INFO L226 Difference]: Without dead ends: 225 [2025-02-08 09:01:06,247 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4092 GetRequests, 4005 SyntacticMatches, 22 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1201, Invalid=3221, Unknown=0, NotChecked=0, Total=4422 [2025-02-08 09:01:06,247 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 444 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-02-08 09:01:06,247 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 166 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-02-08 09:01:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2025-02-08 09:01:06,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2025-02-08 09:01:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 168 states have internal predecessors, (177), 27 states have call successors, (27), 20 states have call predecessors, (27), 12 states have return successors, (79), 23 states have call predecessors, (79), 26 states have call successors, (79) [2025-02-08 09:01:06,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 283 transitions. [2025-02-08 09:01:06,271 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 283 transitions. Word has length 2013 [2025-02-08 09:01:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-02-08 09:01:06,272 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 283 transitions. [2025-02-08 09:01:06,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.914285714285715) internal successors, (207), 35 states have internal predecessors, (207), 30 states have call successors, (37), 7 states have call predecessors, (37), 13 states have return successors, (40), 15 states have call predecessors, (40), 25 states have call successors, (40) [2025-02-08 09:01:06,273 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 283 transitions. [2025-02-08 09:01:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1322 [2025-02-08 09:01:06,294 INFO L210 NwaCegarLoop]: Found error trace [2025-02-08 09:01:06,294 INFO L218 NwaCegarLoop]: trace histogram [135, 134, 109, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 67, 66, 42, 26, 1, 1, 1, 1, 1] [2025-02-08 09:01:06,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-02-08 09:01:06,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:01:06,495 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-02-08 09:01:06,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 09:01:06,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1135974167, now seen corresponding path program 14 times [2025-02-08 09:01:06,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 09:01:06,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136937191] [2025-02-08 09:01:06,496 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:01:06,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 09:01:06,538 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1321 statements into 2 equivalence classes. [2025-02-08 09:01:06,645 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1321 of 1321 statements. [2025-02-08 09:01:06,645 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:01:06,645 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:01:08,332 INFO L134 CoverageAnalysis]: Checked inductivity of 63908 backedges. 4421 proven. 9982 refuted. 0 times theorem prover too weak. 49505 trivial. 0 not checked. [2025-02-08 09:01:08,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 09:01:08,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136937191] [2025-02-08 09:01:08,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136937191] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 09:01:08,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836041321] [2025-02-08 09:01:08,333 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 09:01:08,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 09:01:08,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 09:01:08,334 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 09:01:08,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-08 09:01:08,716 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1321 statements into 2 equivalence classes. [2025-02-08 09:01:08,937 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1321 of 1321 statements. [2025-02-08 09:01:08,937 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 09:01:08,937 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 09:01:08,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 2461 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-08 09:01:08,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 09:01:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 63908 backedges. 31307 proven. 5527 refuted. 0 times theorem prover too weak. 27074 trivial. 0 not checked. [2025-02-08 09:01:09,149 INFO L312 TraceCheckSpWp]: Computing backward predicates...