./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 e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 86ba16bc10375ac42edefcd6943a10cb01d22e743b7024fc57762abf0f29fc40 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:45:39,722 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:45:39,772 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2025-03-09 01:45:39,776 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:45:39,777 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:45:39,792 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:45:39,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:45:39,793 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:45:39,793 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:45:39,793 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:45:39,793 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:45:39,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:45:39,794 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:45:39,794 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:45:39,794 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:45:39,794 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:45:39,794 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-09 01:45:39,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:45:39,795 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:45:39,795 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:45:39,796 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:45:39,796 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86ba16bc10375ac42edefcd6943a10cb01d22e743b7024fc57762abf0f29fc40 [2025-03-09 01:45:40,049 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:45:40,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:45:40,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:45:40,060 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:45:40,060 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:45:40,062 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2025-03-09 01:45:41,233 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f5d9b68/663cb6c4d7e142088ed066e33fe4a4a3/FLAG52106c930 [2025-03-09 01:45:41,436 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:45:41,436 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-numeric/Fibonacci01-2.c [2025-03-09 01:45:41,444 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f5d9b68/663cb6c4d7e142088ed066e33fe4a4a3/FLAG52106c930 [2025-03-09 01:45:41,461 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f5d9b68/663cb6c4d7e142088ed066e33fe4a4a3 [2025-03-09 01:45:41,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:45:41,465 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:45:41,466 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:45:41,467 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:45:41,470 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:45:41,471 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,471 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@375fede8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41, skipping insertion in model container [2025-03-09 01:45:41,474 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,483 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:45:41,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:45:41,600 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:45:41,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:45:41,620 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:45:41,621 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41 WrapperNode [2025-03-09 01:45:41,621 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:45:41,622 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:45:41,622 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:45:41,622 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:45:41,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,634 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,645 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2025-03-09 01:45:41,645 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:45:41,646 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:45:41,647 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:45:41,647 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:45:41,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,653 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,664 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-03-09 01:45:41,664 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,665 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,666 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,670 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,671 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,672 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:45:41,672 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:45:41,672 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:45:41,672 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:45:41,673 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (1/1) ... [2025-03-09 01:45:41,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:45:41,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:41,701 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-09 01:45:41,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-09 01:45:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-03-09 01:45:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-03-09 01:45:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:45:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:45:41,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:45:41,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 01:45:41,766 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:45:41,767 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:45:41,831 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L22: havoc #t~ret4;havoc #t~ret5; [2025-03-09 01:45:41,861 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2025-03-09 01:45:41,861 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:45:41,867 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:45:41,867 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:45:41,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:45:41 BoogieIcfgContainer [2025-03-09 01:45:41,867 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:45:41,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:45:41,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:45:41,874 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:45:41,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:45:41" (1/3) ... [2025-03-09 01:45:41,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60062298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:45:41, skipping insertion in model container [2025-03-09 01:45:41,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:45:41" (2/3) ... [2025-03-09 01:45:41,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60062298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:45:41, skipping insertion in model container [2025-03-09 01:45:41,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:45:41" (3/3) ... [2025-03-09 01:45:41,875 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci01-2.c [2025-03-09 01:45:41,887 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:45:41,888 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci01-2.c that has 2 procedures, 33 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-03-09 01:45:41,932 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:45:41,944 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;@2f92d500, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:45:41,945 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-03-09 01:45:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-03-09 01:45:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2025-03-09 01:45:41,952 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:41,952 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:41,953 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:41,956 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:41,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1524396915, now seen corresponding path program 1 times [2025-03-09 01:45:41,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:41,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107044690] [2025-03-09 01:45:41,961 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:41,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:42,004 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-09 01:45:42,014 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-09 01:45:42,015 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:42,015 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:45:42,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:42,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107044690] [2025-03-09 01:45:42,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107044690] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:45:42,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:45:42,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:45:42,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134149424] [2025-03-09 01:45:42,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:45:42,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:45:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:42,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:45:42,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:45:42,097 INFO L87 Difference]: Start difference. First operand has 33 states, 22 states have (on average 1.5) internal successors, (33), 28 states have internal predecessors, (33), 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 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:45:42,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:42,138 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2025-03-09 01:45:42,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:45:42,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2025-03-09 01:45:42,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:42,146 INFO L225 Difference]: With dead ends: 38 [2025-03-09 01:45:42,146 INFO L226 Difference]: Without dead ends: 26 [2025-03-09 01:45:42,148 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:45:42,150 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 11 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:42,151 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 01:45:42,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2025-03-09 01:45:42,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2025-03-09 01:45:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.375) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 01:45:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2025-03-09 01:45:42,176 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 9 [2025-03-09 01:45:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:42,177 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2025-03-09 01:45:42,177 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:45:42,177 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2025-03-09 01:45:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2025-03-09 01:45:42,177 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:42,177 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:42,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:45:42,177 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:42,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:42,178 INFO L85 PathProgramCache]: Analyzing trace with hash -11664124, now seen corresponding path program 1 times [2025-03-09 01:45:42,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:42,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349100618] [2025-03-09 01:45:42,178 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:42,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:42,182 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:45:42,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:45:42,187 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:42,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:42,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:45:42,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:42,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349100618] [2025-03-09 01:45:42,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349100618] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:45:42,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:45:42,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:45:42,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618508041] [2025-03-09 01:45:42,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:45:42,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:45:42,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:42,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:45:42,240 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:45:42,240 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:45:42,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:42,300 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2025-03-09 01:45:42,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:45:42,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2025-03-09 01:45:42,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:42,301 INFO L225 Difference]: With dead ends: 26 [2025-03-09 01:45:42,301 INFO L226 Difference]: Without dead ends: 24 [2025-03-09 01:45:42,301 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:45:42,302 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 32 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 [2025-03-09 01:45:42,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 32 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 01:45:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-03-09 01:45:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2025-03-09 01:45:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 01:45:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2025-03-09 01:45:42,305 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2025-03-09 01:45:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:42,306 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2025-03-09 01:45:42,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:45:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2025-03-09 01:45:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2025-03-09 01:45:42,306 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:42,306 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:42,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:45:42,307 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:42,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash -11803775, now seen corresponding path program 1 times [2025-03-09 01:45:42,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:42,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433799046] [2025-03-09 01:45:42,307 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:42,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:42,315 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 25 statements into 1 equivalence classes. [2025-03-09 01:45:42,327 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 25 of 25 statements. [2025-03-09 01:45:42,327 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:42,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-09 01:45:42,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:42,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433799046] [2025-03-09 01:45:42,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433799046] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:45:42,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:45:42,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:45:42,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280330392] [2025-03-09 01:45:42,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:45:42,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:45:42,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:42,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:45:42,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:45:42,457 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 01:45:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:42,500 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2025-03-09 01:45:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:45:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2025-03-09 01:45:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:42,502 INFO L225 Difference]: With dead ends: 36 [2025-03-09 01:45:42,502 INFO L226 Difference]: Without dead ends: 34 [2025-03-09 01:45:42,502 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:45:42,503 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:42,503 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 58 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 01:45:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2025-03-09 01:45:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2025-03-09 01:45:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.173913043478261) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-03-09 01:45:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2025-03-09 01:45:42,510 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2025-03-09 01:45:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:42,511 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2025-03-09 01:45:42,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 01:45:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2025-03-09 01:45:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-09 01:45:42,511 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:42,511 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:42,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-09 01:45:42,512 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:42,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:42,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1437883784, now seen corresponding path program 1 times [2025-03-09 01:45:42,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:42,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82781997] [2025-03-09 01:45:42,512 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:42,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:42,519 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-09 01:45:42,532 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-09 01:45:42,534 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:42,534 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-09 01:45:42,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82781997] [2025-03-09 01:45:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82781997] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315579804] [2025-03-09 01:45:42,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:42,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:42,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:42,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:45:42,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-09 01:45:42,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-09 01:45:42,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:42,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:42,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 01:45:42,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:42,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-09 01:45:42,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-09 01:45:42,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315579804] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:42,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:42,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-03-09 01:45:42,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249682886] [2025-03-09 01:45:42,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:42,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-09 01:45:42,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:42,934 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-09 01:45:42,934 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-03-09 01:45:42,934 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-09 01:45:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:43,196 INFO L93 Difference]: Finished difference Result 92 states and 130 transitions. [2025-03-09 01:45:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:45:43,196 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 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 32 [2025-03-09 01:45:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:43,198 INFO L225 Difference]: With dead ends: 92 [2025-03-09 01:45:43,198 INFO L226 Difference]: Without dead ends: 66 [2025-03-09 01:45:43,199 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-03-09 01:45:43,199 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 103 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:43,200 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 110 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:45:43,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-09 01:45:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2025-03-09 01:45:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.1) internal successors, (44), 43 states have internal predecessors, (44), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2025-03-09 01:45:43,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2025-03-09 01:45:43,215 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 32 [2025-03-09 01:45:43,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:43,217 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2025-03-09 01:45:43,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-03-09 01:45:43,217 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2025-03-09 01:45:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2025-03-09 01:45:43,219 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:43,219 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:43,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-09 01:45:43,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:43,420 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:43,420 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:43,420 INFO L85 PathProgramCache]: Analyzing trace with hash -72436654, now seen corresponding path program 2 times [2025-03-09 01:45:43,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:43,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293535680] [2025-03-09 01:45:43,420 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:45:43,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:43,425 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-09 01:45:43,430 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-09 01:45:43,430 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:45:43,430 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-09 01:45:43,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:43,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293535680] [2025-03-09 01:45:43,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293535680] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:43,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751965966] [2025-03-09 01:45:43,524 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:45:43,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:43,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:43,526 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:43,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:45:43,554 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-03-09 01:45:43,564 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-03-09 01:45:43,564 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:45:43,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:43,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 01:45:43,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-09 01:45:43,609 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:45:43,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751965966] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:45:43,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 01:45:43,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-03-09 01:45:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600379898] [2025-03-09 01:45:43,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:45:43,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:45:43,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:43,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:45:43,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-09 01:45:43,611 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 01:45:43,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:43,643 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2025-03-09 01:45:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:45:43,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2025-03-09 01:45:43,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:43,646 INFO L225 Difference]: With dead ends: 61 [2025-03-09 01:45:43,646 INFO L226 Difference]: Without dead ends: 60 [2025-03-09 01:45:43,647 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-09 01:45:43,647 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:43,647 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 54 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 01:45:43,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2025-03-09 01:45:43,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2025-03-09 01:45:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 44 states have internal predecessors, (46), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 9 states have call predecessors, (18), 6 states have call successors, (18) [2025-03-09 01:45:43,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 71 transitions. [2025-03-09 01:45:43,654 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 71 transitions. Word has length 32 [2025-03-09 01:45:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:43,655 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 71 transitions. [2025-03-09 01:45:43,655 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 01:45:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 71 transitions. [2025-03-09 01:45:43,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2025-03-09 01:45:43,655 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:43,655 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, 1] [2025-03-09 01:45:43,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-09 01:45:43,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:43,860 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:43,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:43,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2049430995, now seen corresponding path program 1 times [2025-03-09 01:45:43,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:43,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248121835] [2025-03-09 01:45:43,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:43,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:43,864 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-09 01:45:43,868 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-09 01:45:43,868 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:43,868 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-09 01:45:43,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248121835] [2025-03-09 01:45:43,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248121835] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:43,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435519364] [2025-03-09 01:45:43,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:43,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:43,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:43,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:43,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:45:43,956 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-09 01:45:43,964 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-09 01:45:43,965 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:43,965 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:43,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:45:43,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:44,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-09 01:45:44,027 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:45:44,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435519364] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:45:44,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 01:45:44,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-09 01:45:44,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130253372] [2025-03-09 01:45:44,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:45:44,027 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:45:44,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:44,027 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:45:44,028 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:45:44,028 INFO L87 Difference]: Start difference. First operand 56 states and 71 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 01:45:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:44,065 INFO L93 Difference]: Finished difference Result 83 states and 118 transitions. [2025-03-09 01:45:44,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:45:44,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 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 33 [2025-03-09 01:45:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:44,067 INFO L225 Difference]: With dead ends: 83 [2025-03-09 01:45:44,067 INFO L226 Difference]: Without dead ends: 82 [2025-03-09 01:45:44,068 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-03-09 01:45:44,068 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:44,068 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 74 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-03-09 01:45:44,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2025-03-09 01:45:44,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2025-03-09 01:45:44,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (27), 11 states have call predecessors, (27), 7 states have call successors, (27) [2025-03-09 01:45:44,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 88 transitions. [2025-03-09 01:45:44,078 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 88 transitions. Word has length 33 [2025-03-09 01:45:44,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:44,079 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 88 transitions. [2025-03-09 01:45:44,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-03-09 01:45:44,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 88 transitions. [2025-03-09 01:45:44,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2025-03-09 01:45:44,080 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:44,080 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, 1] [2025-03-09 01:45:44,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-09 01:45:44,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:44,281 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:44,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:44,281 INFO L85 PathProgramCache]: Analyzing trace with hash 502266677, now seen corresponding path program 1 times [2025-03-09 01:45:44,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:44,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840254659] [2025-03-09 01:45:44,281 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:44,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:44,285 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-09 01:45:44,289 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-09 01:45:44,289 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:44,289 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:44,437 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2025-03-09 01:45:44,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840254659] [2025-03-09 01:45:44,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840254659] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:44,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640134527] [2025-03-09 01:45:44,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:44,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:44,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:44,439 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:44,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 01:45:44,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-09 01:45:44,475 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-09 01:45:44,475 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:44,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:44,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-09 01:45:44,478 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2025-03-09 01:45:44,564 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:44,726 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2025-03-09 01:45:44,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640134527] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:44,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:44,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-03-09 01:45:44,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356456635] [2025-03-09 01:45:44,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:44,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-09 01:45:44,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:44,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-09 01:45:44,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-03-09 01:45:44,728 INFO L87 Difference]: Start difference. First operand 65 states and 88 transitions. Second operand has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-09 01:45:44,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:44,897 INFO L93 Difference]: Finished difference Result 142 states and 218 transitions. [2025-03-09 01:45:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-09 01:45:44,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 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 47 [2025-03-09 01:45:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:44,899 INFO L225 Difference]: With dead ends: 142 [2025-03-09 01:45:44,899 INFO L226 Difference]: Without dead ends: 140 [2025-03-09 01:45:44,900 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-03-09 01:45:44,904 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:44,904 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 166 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:45:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2025-03-09 01:45:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2025-03-09 01:45:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 11 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (66), 20 states have call predecessors, (66), 10 states have call successors, (66) [2025-03-09 01:45:44,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 160 transitions. [2025-03-09 01:45:44,928 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 160 transitions. Word has length 47 [2025-03-09 01:45:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:44,928 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 160 transitions. [2025-03-09 01:45:44,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.066666666666667) internal successors, (46), 16 states have internal predecessors, (46), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-09 01:45:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 160 transitions. [2025-03-09 01:45:44,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2025-03-09 01:45:44,931 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:44,931 INFO L218 NwaCegarLoop]: trace histogram [8, 6, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:44,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-09 01:45:45,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:45,132 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:45,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1954339160, now seen corresponding path program 1 times [2025-03-09 01:45:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:45,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585363828] [2025-03-09 01:45:45,133 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:45,137 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-09 01:45:45,146 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-09 01:45:45,146 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:45,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-03-09 01:45:45,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:45,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585363828] [2025-03-09 01:45:45,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585363828] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:45,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437686685] [2025-03-09 01:45:45,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:45:45,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:45,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:45,296 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:45,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 01:45:45,328 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 70 statements into 1 equivalence classes. [2025-03-09 01:45:45,348 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 70 of 70 statements. [2025-03-09 01:45:45,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:45,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:45,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:45:45,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-03-09 01:45:45,425 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:45,599 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-03-09 01:45:45,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437686685] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:45,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:45,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 18 [2025-03-09 01:45:45,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009593898] [2025-03-09 01:45:45,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:45,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:45:45,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:45,601 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:45:45,601 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:45:45,601 INFO L87 Difference]: Start difference. First operand 99 states and 160 transitions. Second operand has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 7 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14) [2025-03-09 01:45:46,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:46,105 INFO L93 Difference]: Finished difference Result 258 states and 505 transitions. [2025-03-09 01:45:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-03-09 01:45:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 7 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14) Word has length 70 [2025-03-09 01:45:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:46,108 INFO L225 Difference]: With dead ends: 258 [2025-03-09 01:45:46,108 INFO L226 Difference]: Without dead ends: 164 [2025-03-09 01:45:46,114 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1473, Unknown=0, NotChecked=0, Total=1892 [2025-03-09 01:45:46,115 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:46,115 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 85 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 01:45:46,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2025-03-09 01:45:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 104. [2025-03-09 01:45:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 12 states have call successors, (12), 3 states have call predecessors, (12), 10 states have return successors, (75), 19 states have call predecessors, (75), 11 states have call successors, (75) [2025-03-09 01:45:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 172 transitions. [2025-03-09 01:45:46,140 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 172 transitions. Word has length 70 [2025-03-09 01:45:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:46,140 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 172 transitions. [2025-03-09 01:45:46,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 18 states have internal predecessors, (69), 7 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (14), 10 states have call predecessors, (14), 7 states have call successors, (14) [2025-03-09 01:45:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 172 transitions. [2025-03-09 01:45:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2025-03-09 01:45:46,142 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:46,142 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:46,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-09 01:45:46,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:46,343 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:46,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:46,343 INFO L85 PathProgramCache]: Analyzing trace with hash 624222528, now seen corresponding path program 2 times [2025-03-09 01:45:46,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:46,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983918438] [2025-03-09 01:45:46,343 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:45:46,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:46,348 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 124 statements into 2 equivalence classes. [2025-03-09 01:45:46,359 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-09 01:45:46,360 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:45:46,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 30 proven. 126 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2025-03-09 01:45:46,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:46,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983918438] [2025-03-09 01:45:46,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983918438] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:46,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749695419] [2025-03-09 01:45:46,445 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:45:46,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:46,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:46,447 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:46,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 01:45:46,471 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 124 statements into 2 equivalence classes. [2025-03-09 01:45:46,492 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 124 of 124 statements. [2025-03-09 01:45:46,492 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:45:46,492 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:46,493 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:45:46,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 9 proven. 130 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2025-03-09 01:45:46,578 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 474 backedges. 9 proven. 130 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2025-03-09 01:45:46,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749695419] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:46,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:46,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-03-09 01:45:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642533743] [2025-03-09 01:45:46,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:46,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:45:46,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:46,914 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:45:46,914 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:45:46,915 INFO L87 Difference]: Start difference. First operand 104 states and 172 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-09 01:45:47,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:47,007 INFO L93 Difference]: Finished difference Result 163 states and 279 transitions. [2025-03-09 01:45:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:45:47,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 124 [2025-03-09 01:45:47,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:47,010 INFO L225 Difference]: With dead ends: 163 [2025-03-09 01:45:47,010 INFO L226 Difference]: Without dead ends: 64 [2025-03-09 01:45:47,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-03-09 01:45:47,011 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:47,011 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 94 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:45:47,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-03-09 01:45:47,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-03-09 01:45:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (26), 10 states have call predecessors, (26), 6 states have call successors, (26) [2025-03-09 01:45:47,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2025-03-09 01:45:47,023 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 124 [2025-03-09 01:45:47,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:47,023 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2025-03-09 01:45:47,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 12 states have internal predecessors, (50), 4 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-09 01:45:47,023 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2025-03-09 01:45:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2025-03-09 01:45:47,024 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:47,024 INFO L218 NwaCegarLoop]: trace histogram [20, 17, 16, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 7, 6, 4, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:47,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-09 01:45:47,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:47,231 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:47,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1750796034, now seen corresponding path program 3 times [2025-03-09 01:45:47,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:47,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558251274] [2025-03-09 01:45:47,232 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:45:47,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:47,254 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 185 statements into 17 equivalence classes. [2025-03-09 01:45:47,268 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 72 of 185 statements. [2025-03-09 01:45:47,268 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-09 01:45:47,268 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 332 proven. 18 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2025-03-09 01:45:47,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:47,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558251274] [2025-03-09 01:45:47,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558251274] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:47,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532775141] [2025-03-09 01:45:47,339 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:45:47,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:47,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:47,341 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:47,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 01:45:47,371 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 185 statements into 17 equivalence classes. [2025-03-09 01:45:47,385 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 72 of 185 statements. [2025-03-09 01:45:47,385 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-03-09 01:45:47,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:47,386 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:45:47,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 328 proven. 20 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2025-03-09 01:45:47,427 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1135 backedges. 328 proven. 22 refuted. 0 times theorem prover too weak. 785 trivial. 0 not checked. [2025-03-09 01:45:47,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532775141] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:47,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:47,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 13 [2025-03-09 01:45:47,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401211014] [2025-03-09 01:45:47,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:47,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-09 01:45:47,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:47,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-09 01:45:47,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-03-09 01:45:47,693 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-09 01:45:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:47,779 INFO L93 Difference]: Finished difference Result 125 states and 180 transitions. [2025-03-09 01:45:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-09 01:45:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 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 185 [2025-03-09 01:45:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:47,780 INFO L225 Difference]: With dead ends: 125 [2025-03-09 01:45:47,780 INFO L226 Difference]: Without dead ends: 66 [2025-03-09 01:45:47,781 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 363 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2025-03-09 01:45:47,781 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 61 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:47,782 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 86 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:45:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2025-03-09 01:45:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2025-03-09 01:45:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 51 states have internal predecessors, (56), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (22), 10 states have call predecessors, (22), 6 states have call successors, (22) [2025-03-09 01:45:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2025-03-09 01:45:47,787 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 185 [2025-03-09 01:45:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:47,788 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2025-03-09 01:45:47,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 4 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2025-03-09 01:45:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2025-03-09 01:45:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2025-03-09 01:45:47,789 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:47,789 INFO L218 NwaCegarLoop]: trace histogram [20, 17, 15, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 7, 5, 5, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:47,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-09 01:45:47,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:47,990 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:47,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:47,991 INFO L85 PathProgramCache]: Analyzing trace with hash -161715029, now seen corresponding path program 4 times [2025-03-09 01:45:47,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:47,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542625185] [2025-03-09 01:45:47,991 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:45:47,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:48,006 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 184 statements into 2 equivalence classes. [2025-03-09 01:45:48,014 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 110 of 184 statements. [2025-03-09 01:45:48,014 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-09 01:45:48,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 112 proven. 280 refuted. 0 times theorem prover too weak. 728 trivial. 0 not checked. [2025-03-09 01:45:48,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:48,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542625185] [2025-03-09 01:45:48,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542625185] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:48,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746350575] [2025-03-09 01:45:48,095 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:45:48,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:48,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:48,097 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:48,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 01:45:48,128 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 184 statements into 2 equivalence classes. [2025-03-09 01:45:48,146 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 110 of 184 statements. [2025-03-09 01:45:48,146 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-09 01:45:48,146 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:48,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:45:48,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 516 proven. 15 refuted. 0 times theorem prover too weak. 589 trivial. 0 not checked. [2025-03-09 01:45:48,195 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:48,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1120 backedges. 115 proven. 331 refuted. 0 times theorem prover too weak. 674 trivial. 0 not checked. [2025-03-09 01:45:48,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746350575] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:48,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:48,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 14 [2025-03-09 01:45:48,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006644756] [2025-03-09 01:45:48,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:48,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:45:48,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:48,472 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:45:48,472 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:45:48,472 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-03-09 01:45:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:48,554 INFO L93 Difference]: Finished difference Result 120 states and 160 transitions. [2025-03-09 01:45:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:45:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 184 [2025-03-09 01:45:48,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:48,555 INFO L225 Difference]: With dead ends: 120 [2025-03-09 01:45:48,555 INFO L226 Difference]: Without dead ends: 59 [2025-03-09 01:45:48,556 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 360 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:45:48,556 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 34 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:48,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 78 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:45:48,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2025-03-09 01:45:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2025-03-09 01:45:48,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 44 states have internal predecessors, (48), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2025-03-09 01:45:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2025-03-09 01:45:48,572 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 184 [2025-03-09 01:45:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:48,572 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2025-03-09 01:45:48,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 7 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2025-03-09 01:45:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2025-03-09 01:45:48,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2025-03-09 01:45:48,573 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:48,573 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 9, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:48,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-09 01:45:48,777 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-09 01:45:48,777 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:48,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:48,777 INFO L85 PathProgramCache]: Analyzing trace with hash -138764592, now seen corresponding path program 5 times [2025-03-09 01:45:48,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:48,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766742723] [2025-03-09 01:45:48,777 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:45:48,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:48,783 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 106 statements into 10 equivalence classes. [2025-03-09 01:45:48,789 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 60 of 106 statements. [2025-03-09 01:45:48,792 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-09 01:45:48,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 118 proven. 97 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2025-03-09 01:45:48,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766742723] [2025-03-09 01:45:48,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766742723] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:48,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674885648] [2025-03-09 01:45:48,913 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:45:48,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:48,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:48,915 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:48,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 01:45:48,948 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 106 statements into 10 equivalence classes. [2025-03-09 01:45:48,959 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 60 of 106 statements. [2025-03-09 01:45:48,960 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-03-09 01:45:48,960 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:48,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-03-09 01:45:48,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 119 proven. 95 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2025-03-09 01:45:49,033 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 118 proven. 99 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2025-03-09 01:45:49,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674885648] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:49,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:49,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 17 [2025-03-09 01:45:49,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977950584] [2025-03-09 01:45:49,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:49,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-09 01:45:49,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:49,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-09 01:45:49,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2025-03-09 01:45:49,372 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 8 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-09 01:45:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:49,583 INFO L93 Difference]: Finished difference Result 122 states and 148 transitions. [2025-03-09 01:45:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-09 01:45:49,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 8 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) Word has length 106 [2025-03-09 01:45:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:49,584 INFO L225 Difference]: With dead ends: 122 [2025-03-09 01:45:49,584 INFO L226 Difference]: Without dead ends: 65 [2025-03-09 01:45:49,585 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 203 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2025-03-09 01:45:49,585 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 109 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:49,585 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 105 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:45:49,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2025-03-09 01:45:49,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2025-03-09 01:45:49,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (11), 8 states have call predecessors, (11), 6 states have call successors, (11) [2025-03-09 01:45:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 72 transitions. [2025-03-09 01:45:49,591 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 72 transitions. Word has length 106 [2025-03-09 01:45:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:49,591 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 72 transitions. [2025-03-09 01:45:49,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 8 states have call successors, (13), 1 states have call predecessors, (13), 5 states have return successors, (13), 8 states have call predecessors, (13), 8 states have call successors, (13) [2025-03-09 01:45:49,592 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 72 transitions. [2025-03-09 01:45:49,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2025-03-09 01:45:49,593 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:49,593 INFO L218 NwaCegarLoop]: trace histogram [26, 23, 21, 13, 13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 11, 10, 8, 5, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:49,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-09 01:45:49,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:49,794 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:49,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:49,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1566533191, now seen corresponding path program 6 times [2025-03-09 01:45:49,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:49,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449019329] [2025-03-09 01:45:49,795 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:45:49,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:49,804 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 244 statements into 21 equivalence classes. [2025-03-09 01:45:49,828 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 213 of 244 statements. [2025-03-09 01:45:49,828 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-09 01:45:49,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:50,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 393 proven. 471 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2025-03-09 01:45:50,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:50,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449019329] [2025-03-09 01:45:50,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449019329] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:50,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940303915] [2025-03-09 01:45:50,079 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:45:50,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:50,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:50,081 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:50,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 01:45:50,117 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 244 statements into 21 equivalence classes. [2025-03-09 01:45:50,173 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) and asserted 213 of 244 statements. [2025-03-09 01:45:50,174 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2025-03-09 01:45:50,174 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:50,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:45:50,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:50,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 385 proven. 478 refuted. 0 times theorem prover too weak. 1166 trivial. 0 not checked. [2025-03-09 01:45:50,245 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2029 backedges. 385 proven. 488 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2025-03-09 01:45:50,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940303915] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:50,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:50,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 21 [2025-03-09 01:45:50,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510011352] [2025-03-09 01:45:50,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:50,728 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-09 01:45:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:50,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-09 01:45:50,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-03-09 01:45:50,729 INFO L87 Difference]: Start difference. First operand 63 states and 72 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 12 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 14 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-09 01:45:50,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:50,992 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2025-03-09 01:45:50,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-09 01:45:50,993 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 12 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 14 states have call predecessors, (20), 10 states have call successors, (20) Word has length 244 [2025-03-09 01:45:50,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:50,994 INFO L225 Difference]: With dead ends: 166 [2025-03-09 01:45:50,994 INFO L226 Difference]: Without dead ends: 110 [2025-03-09 01:45:50,995 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 481 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=807, Unknown=0, NotChecked=0, Total=1122 [2025-03-09 01:45:50,995 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 246 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:50,995 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 131 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 01:45:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2025-03-09 01:45:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2025-03-09 01:45:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 71 states have internal predecessors, (78), 11 states have call successors, (11), 7 states have call predecessors, (11), 7 states have return successors, (25), 11 states have call predecessors, (25), 10 states have call successors, (25) [2025-03-09 01:45:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2025-03-09 01:45:51,004 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 244 [2025-03-09 01:45:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:51,005 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2025-03-09 01:45:51,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 12 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 14 states have call predecessors, (20), 10 states have call successors, (20) [2025-03-09 01:45:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2025-03-09 01:45:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2025-03-09 01:45:51,006 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:51,006 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, 1] [2025-03-09 01:45:51,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-09 01:45:51,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-03-09 01:45:51,206 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:51,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:51,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1887722427, now seen corresponding path program 7 times [2025-03-09 01:45:51,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:51,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991669240] [2025-03-09 01:45:51,207 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 01:45:51,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:51,212 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 125 statements into 1 equivalence classes. [2025-03-09 01:45:51,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 125 of 125 statements. [2025-03-09 01:45:51,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:51,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:51,358 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 147 proven. 168 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2025-03-09 01:45:51,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:51,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991669240] [2025-03-09 01:45:51,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991669240] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:51,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455492508] [2025-03-09 01:45:51,359 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 01:45:51,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:51,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:51,361 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:51,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 01:45:51,394 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 125 statements into 1 equivalence classes. [2025-03-09 01:45:51,413 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 125 of 125 statements. [2025-03-09 01:45:51,413 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:45:51,413 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:51,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:45:51,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:51,481 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 143 proven. 182 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2025-03-09 01:45:51,481 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 143 proven. 202 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2025-03-09 01:45:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455492508] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:52,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:52,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2025-03-09 01:45:52,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719541973] [2025-03-09 01:45:52,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:52,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-09 01:45:52,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:52,030 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-09 01:45:52,030 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2025-03-09 01:45:52,030 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 13 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (18), 8 states have call predecessors, (18), 13 states have call successors, (18) [2025-03-09 01:45:52,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:52,195 INFO L93 Difference]: Finished difference Result 194 states and 260 transitions. [2025-03-09 01:45:52,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-09 01:45:52,195 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 13 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (18), 8 states have call predecessors, (18), 13 states have call successors, (18) Word has length 125 [2025-03-09 01:45:52,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:52,196 INFO L225 Difference]: With dead ends: 194 [2025-03-09 01:45:52,196 INFO L226 Difference]: Without dead ends: 111 [2025-03-09 01:45:52,197 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 239 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2025-03-09 01:45:52,197 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 68 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:52,198 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 142 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:45:52,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2025-03-09 01:45:52,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2025-03-09 01:45:52,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 90 states have (on average 1.0666666666666667) internal successors, (96), 87 states have internal predecessors, (96), 13 states have call successors, (13), 12 states have call predecessors, (13), 7 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2025-03-09 01:45:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 136 transitions. [2025-03-09 01:45:52,204 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 136 transitions. Word has length 125 [2025-03-09 01:45:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:52,204 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 136 transitions. [2025-03-09 01:45:52,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 13 states have call successors, (16), 1 states have call predecessors, (16), 7 states have return successors, (18), 8 states have call predecessors, (18), 13 states have call successors, (18) [2025-03-09 01:45:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 136 transitions. [2025-03-09 01:45:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2025-03-09 01:45:52,207 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:52,207 INFO L218 NwaCegarLoop]: trace histogram [16, 14, 13, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:52,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-09 01:45:52,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-09 01:45:52,411 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:52,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1420830941, now seen corresponding path program 8 times [2025-03-09 01:45:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:52,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280669039] [2025-03-09 01:45:52,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:45:52,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:52,417 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 151 statements into 2 equivalence classes. [2025-03-09 01:45:52,424 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 151 of 151 statements. [2025-03-09 01:45:52,424 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:45:52,424 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 78 proven. 189 refuted. 0 times theorem prover too weak. 464 trivial. 0 not checked. [2025-03-09 01:45:52,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280669039] [2025-03-09 01:45:52,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280669039] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:52,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981266508] [2025-03-09 01:45:52,762 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:45:52,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:52,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:52,764 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:52,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 01:45:52,803 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 151 statements into 2 equivalence classes. [2025-03-09 01:45:52,828 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 151 of 151 statements. [2025-03-09 01:45:52,828 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:45:52,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:52,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 29 conjuncts are in the unsatisfiable core [2025-03-09 01:45:52,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:52,967 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2025-03-09 01:45:52,967 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:53,867 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 144 proven. 128 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2025-03-09 01:45:53,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981266508] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:53,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:53,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 17] total 31 [2025-03-09 01:45:53,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593291760] [2025-03-09 01:45:53,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:53,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-09 01:45:53,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:53,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-09 01:45:53,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2025-03-09 01:45:53,869 INFO L87 Difference]: Start difference. First operand 111 states and 136 transitions. Second operand has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 32 states have internal predecessors, (86), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2025-03-09 01:45:54,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:54,016 INFO L93 Difference]: Finished difference Result 139 states and 176 transitions. [2025-03-09 01:45:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-03-09 01:45:54,019 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 32 states have internal predecessors, (86), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) Word has length 151 [2025-03-09 01:45:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:54,021 INFO L225 Difference]: With dead ends: 139 [2025-03-09 01:45:54,021 INFO L226 Difference]: Without dead ends: 138 [2025-03-09 01:45:54,023 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 286 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=967, Unknown=0, NotChecked=0, Total=1260 [2025-03-09 01:45:54,024 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:54,024 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 173 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:45:54,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-03-09 01:45:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2025-03-09 01:45:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 110 states have (on average 1.0545454545454545) internal successors, (116), 105 states have internal predecessors, (116), 15 states have call successors, (15), 12 states have call predecessors, (15), 9 states have return successors, (37), 17 states have call predecessors, (37), 14 states have call successors, (37) [2025-03-09 01:45:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 168 transitions. [2025-03-09 01:45:54,034 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 168 transitions. Word has length 151 [2025-03-09 01:45:54,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:45:54,035 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 168 transitions. [2025-03-09 01:45:54,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.774193548387097) internal successors, (86), 32 states have internal predecessors, (86), 8 states have call successors, (9), 1 states have call predecessors, (9), 9 states have return successors, (21), 21 states have call predecessors, (21), 8 states have call successors, (21) [2025-03-09 01:45:54,035 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 168 transitions. [2025-03-09 01:45:54,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2025-03-09 01:45:54,041 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:45:54,041 INFO L218 NwaCegarLoop]: trace histogram [58, 55, 47, 29, 29, 29, 29, 28, 28, 28, 28, 28, 27, 27, 27, 26, 18, 11, 1, 1, 1, 1, 1, 1] [2025-03-09 01:45:54,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-09 01:45:54,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-03-09 01:45:54,245 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:45:54,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:45:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash 181978125, now seen corresponding path program 9 times [2025-03-09 01:45:54,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:45:54,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521339162] [2025-03-09 01:45:54,246 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:45:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:45:54,257 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 558 statements into 41 equivalence classes. [2025-03-09 01:45:54,290 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 308 of 558 statements. [2025-03-09 01:45:54,290 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-03-09 01:45:54,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:55,465 INFO L134 CoverageAnalysis]: Checked inductivity of 11140 backedges. 3269 proven. 838 refuted. 0 times theorem prover too weak. 7033 trivial. 0 not checked. [2025-03-09 01:45:55,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:45:55,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521339162] [2025-03-09 01:45:55,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521339162] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:45:55,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88487240] [2025-03-09 01:45:55,466 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:45:55,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:45:55,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:45:55,468 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:45:55,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 01:45:55,537 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 558 statements into 41 equivalence classes. [2025-03-09 01:45:55,598 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) and asserted 308 of 558 statements. [2025-03-09 01:45:55,599 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2025-03-09 01:45:55,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:45:55,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 61 conjuncts are in the unsatisfiable core [2025-03-09 01:45:55,620 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:45:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11140 backedges. 3266 proven. 625 refuted. 0 times theorem prover too weak. 7249 trivial. 0 not checked. [2025-03-09 01:45:55,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:45:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11140 backedges. 3466 proven. 584 refuted. 0 times theorem prover too weak. 7090 trivial. 0 not checked. [2025-03-09 01:45:59,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88487240] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:45:59,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:45:59,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 26] total 45 [2025-03-09 01:45:59,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457275999] [2025-03-09 01:45:59,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:45:59,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2025-03-09 01:45:59,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:45:59,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2025-03-09 01:45:59,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1607, Unknown=0, NotChecked=0, Total=2070 [2025-03-09 01:45:59,701 INFO L87 Difference]: Start difference. First operand 135 states and 168 transitions. Second operand has 46 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 46 states have internal predecessors, (129), 12 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (33), 32 states have call predecessors, (33), 12 states have call successors, (33) [2025-03-09 01:45:59,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:45:59,984 INFO L93 Difference]: Finished difference Result 220 states and 327 transitions. [2025-03-09 01:45:59,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2025-03-09 01:45:59,985 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 46 states have internal predecessors, (129), 12 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (33), 32 states have call predecessors, (33), 12 states have call successors, (33) Word has length 558 [2025-03-09 01:45:59,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:45:59,987 INFO L225 Difference]: With dead ends: 220 [2025-03-09 01:45:59,987 INFO L226 Difference]: Without dead ends: 219 [2025-03-09 01:45:59,988 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1186 GetRequests, 1097 SyntacticMatches, 34 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=708, Invalid=2484, Unknown=0, NotChecked=0, Total=3192 [2025-03-09 01:45:59,989 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:45:59,989 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 171 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:45:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2025-03-09 01:45:59,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 198. [2025-03-09 01:45:59,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 159 states have (on average 1.0377358490566038) internal successors, (165), 154 states have internal predecessors, (165), 22 states have call successors, (22), 12 states have call predecessors, (22), 16 states have return successors, (105), 31 states have call predecessors, (105), 21 states have call successors, (105) [2025-03-09 01:46:00,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 292 transitions. [2025-03-09 01:46:00,002 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 292 transitions. Word has length 558 [2025-03-09 01:46:00,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:46:00,004 INFO L471 AbstractCegarLoop]: Abstraction has 198 states and 292 transitions. [2025-03-09 01:46:00,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.8666666666666667) internal successors, (129), 46 states have internal predecessors, (129), 12 states have call successors, (14), 1 states have call predecessors, (14), 14 states have return successors, (33), 32 states have call predecessors, (33), 12 states have call successors, (33) [2025-03-09 01:46:00,004 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 292 transitions. [2025-03-09 01:46:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2025-03-09 01:46:00,008 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:46:00,008 INFO L218 NwaCegarLoop]: trace histogram [79, 75, 64, 40, 40, 40, 40, 38, 38, 38, 38, 38, 37, 37, 37, 36, 24, 15, 1, 1, 1, 1, 1, 1] [2025-03-09 01:46:00,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-09 01:46:00,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-09 01:46:00,208 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:46:00,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:46:00,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2087189443, now seen corresponding path program 10 times [2025-03-09 01:46:00,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:46:00,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336519535] [2025-03-09 01:46:00,209 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:46:00,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:46:00,222 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 760 statements into 2 equivalence classes. [2025-03-09 01:46:00,243 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 452 of 760 statements. [2025-03-09 01:46:00,243 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-09 01:46:00,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:00,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20878 backedges. 1179 proven. 4277 refuted. 0 times theorem prover too weak. 15422 trivial. 0 not checked. [2025-03-09 01:46:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:46:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336519535] [2025-03-09 01:46:00,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336519535] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:46:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249171550] [2025-03-09 01:46:00,640 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:46:00,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:00,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:46:00,642 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:46:00,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-09 01:46:00,751 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 760 statements into 2 equivalence classes. [2025-03-09 01:46:00,815 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 452 of 760 statements. [2025-03-09 01:46:00,815 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-09 01:46:00,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:00,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-03-09 01:46:00,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:46:00,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20878 backedges. 10540 proven. 2740 refuted. 0 times theorem prover too weak. 7598 trivial. 0 not checked. [2025-03-09 01:46:00,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:46:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20878 backedges. 1424 proven. 5156 refuted. 0 times theorem prover too weak. 14298 trivial. 0 not checked. [2025-03-09 01:46:02,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249171550] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:46:02,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:46:02,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 25] total 30 [2025-03-09 01:46:02,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548935460] [2025-03-09 01:46:02,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:46:02,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-03-09 01:46:02,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:46:02,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-03-09 01:46:02,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2025-03-09 01:46:02,540 INFO L87 Difference]: Start difference. First operand 198 states and 292 transitions. Second operand has 30 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 25 states have call successors, (32), 4 states have call predecessors, (32), 12 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) [2025-03-09 01:46:02,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:46:02,974 INFO L93 Difference]: Finished difference Result 454 states and 748 transitions. [2025-03-09 01:46:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-03-09 01:46:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 25 states have call successors, (32), 4 states have call predecessors, (32), 12 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) Word has length 760 [2025-03-09 01:46:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:46:02,976 INFO L225 Difference]: With dead ends: 454 [2025-03-09 01:46:02,976 INFO L226 Difference]: Without dead ends: 263 [2025-03-09 01:46:02,979 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1573 GetRequests, 1504 SyntacticMatches, 15 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=2284, Unknown=0, NotChecked=0, Total=3080 [2025-03-09 01:46:02,979 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 364 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 01:46:02,979 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 175 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 01:46:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2025-03-09 01:46:02,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 231. [2025-03-09 01:46:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 180 states have internal predecessors, (193), 26 states have call successors, (26), 14 states have call predecessors, (26), 18 states have return successors, (105), 36 states have call predecessors, (105), 25 states have call successors, (105) [2025-03-09 01:46:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 324 transitions. [2025-03-09 01:46:02,993 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 324 transitions. Word has length 760 [2025-03-09 01:46:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:46:02,993 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 324 transitions. [2025-03-09 01:46:02,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.033333333333333) internal successors, (181), 30 states have internal predecessors, (181), 25 states have call successors, (32), 4 states have call predecessors, (32), 12 states have return successors, (37), 14 states have call predecessors, (37), 23 states have call successors, (37) [2025-03-09 01:46:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 324 transitions. [2025-03-09 01:46:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2025-03-09 01:46:02,997 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:46:02,997 INFO L218 NwaCegarLoop]: trace histogram [58, 56, 47, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 27, 18, 11, 1, 1, 1, 1, 1, 1] [2025-03-09 01:46:03,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-09 01:46:03,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:03,197 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:46:03,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:46:03,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1660212479, now seen corresponding path program 11 times [2025-03-09 01:46:03,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:46:03,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789787591] [2025-03-09 01:46:03,198 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:46:03,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:46:03,208 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 563 statements into 38 equivalence classes. [2025-03-09 01:46:03,225 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 211 of 563 statements. [2025-03-09 01:46:03,225 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-09 01:46:03,225 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:03,388 INFO L134 CoverageAnalysis]: Checked inductivity of 11331 backedges. 1129 proven. 2361 refuted. 0 times theorem prover too weak. 7841 trivial. 0 not checked. [2025-03-09 01:46:03,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:46:03,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789787591] [2025-03-09 01:46:03,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789787591] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:46:03,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795214609] [2025-03-09 01:46:03,388 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:46:03,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:03,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:46:03,390 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:46:03,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-09 01:46:03,522 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 563 statements into 38 equivalence classes. [2025-03-09 01:46:03,559 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) and asserted 211 of 563 statements. [2025-03-09 01:46:03,560 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2025-03-09 01:46:03,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:03,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-09 01:46:03,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:46:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 11331 backedges. 5945 proven. 466 refuted. 0 times theorem prover too weak. 4920 trivial. 0 not checked. [2025-03-09 01:46:03,651 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:46:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 11331 backedges. 1135 proven. 2543 refuted. 0 times theorem prover too weak. 7653 trivial. 0 not checked. [2025-03-09 01:46:05,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795214609] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:46:05,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:46:05,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 17] total 24 [2025-03-09 01:46:05,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563420115] [2025-03-09 01:46:05,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:46:05,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-09 01:46:05,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:46:05,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-09 01:46:05,298 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2025-03-09 01:46:05,298 INFO L87 Difference]: Start difference. First operand 231 states and 324 transitions. Second operand has 24 states, 24 states have (on average 5.625) internal successors, (135), 24 states have internal predecessors, (135), 17 states have call successors, (24), 2 states have call predecessors, (24), 9 states have return successors, (28), 12 states have call predecessors, (28), 17 states have call successors, (28) [2025-03-09 01:46:05,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:46:05,515 INFO L93 Difference]: Finished difference Result 401 states and 623 transitions. [2025-03-09 01:46:05,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-09 01:46:05,516 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), 17 states have call successors, (24), 2 states have call predecessors, (24), 9 states have return successors, (28), 12 states have call predecessors, (28), 17 states have call successors, (28) Word has length 563 [2025-03-09 01:46:05,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:46:05,517 INFO L225 Difference]: With dead ends: 401 [2025-03-09 01:46:05,517 INFO L226 Difference]: Without dead ends: 177 [2025-03-09 01:46:05,519 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1152 GetRequests, 1113 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2025-03-09 01:46:05,521 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 59 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-03-09 01:46:05,521 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 188 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-03-09 01:46:05,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2025-03-09 01:46:05,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 168. [2025-03-09 01:46:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 136 states have (on average 1.036764705882353) internal successors, (141), 132 states have internal predecessors, (141), 20 states have call successors, (20), 14 states have call predecessors, (20), 11 states have return successors, (61), 21 states have call predecessors, (61), 19 states have call successors, (61) [2025-03-09 01:46:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 222 transitions. [2025-03-09 01:46:05,530 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 222 transitions. Word has length 563 [2025-03-09 01:46:05,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:46:05,531 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 222 transitions. [2025-03-09 01:46:05,531 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), 17 states have call successors, (24), 2 states have call predecessors, (24), 9 states have return successors, (28), 12 states have call predecessors, (28), 17 states have call successors, (28) [2025-03-09 01:46:05,531 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 222 transitions. [2025-03-09 01:46:05,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 957 [2025-03-09 01:46:05,536 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:46:05,536 INFO L218 NwaCegarLoop]: trace histogram [99, 95, 80, 50, 50, 50, 50, 48, 48, 48, 48, 48, 47, 47, 47, 46, 30, 19, 1, 1, 1, 1, 1, 1] [2025-03-09 01:46:05,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-09 01:46:05,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-09 01:46:05,740 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:46:05,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:46:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1678918539, now seen corresponding path program 12 times [2025-03-09 01:46:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:46:05,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520577195] [2025-03-09 01:46:05,741 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:46:05,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:46:05,760 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 956 statements into 77 equivalence classes. [2025-03-09 01:46:05,890 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) and asserted 908 of 956 statements. [2025-03-09 01:46:05,890 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2025-03-09 01:46:05,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 33222 backedges. 9916 proven. 2617 refuted. 0 times theorem prover too weak. 20689 trivial. 0 not checked. [2025-03-09 01:46:10,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:46:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520577195] [2025-03-09 01:46:10,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520577195] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:46:10,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432369291] [2025-03-09 01:46:10,828 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:46:10,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:10,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:46:10,830 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:46:10,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-09 01:46:10,974 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 956 statements into 77 equivalence classes. [2025-03-09 01:46:11,187 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) and asserted 908 of 956 statements. [2025-03-09 01:46:11,187 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2025-03-09 01:46:11,187 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:11,193 INFO L256 TraceCheckSpWp]: Trace formula consists of 1703 conjuncts, 109 conjuncts are in the unsatisfiable core [2025-03-09 01:46:11,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:46:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 33222 backedges. 9908 proven. 1987 refuted. 0 times theorem prover too weak. 21327 trivial. 0 not checked. [2025-03-09 01:46:11,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:46:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 33222 backedges. 10338 proven. 1872 refuted. 0 times theorem prover too weak. 21012 trivial. 0 not checked. [2025-03-09 01:46:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432369291] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:46:25,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:46:25,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 32] total 59 [2025-03-09 01:46:25,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814216044] [2025-03-09 01:46:25,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:46:25,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2025-03-09 01:46:25,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:46:25,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2025-03-09 01:46:25,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=2770, Unknown=0, NotChecked=0, Total=3540 [2025-03-09 01:46:25,921 INFO L87 Difference]: Start difference. First operand 168 states and 222 transitions. Second operand has 60 states, 59 states have (on average 2.76271186440678) internal successors, (163), 60 states have internal predecessors, (163), 16 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (43), 42 states have call predecessors, (43), 16 states have call successors, (43) [2025-03-09 01:46:26,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:46:26,433 INFO L93 Difference]: Finished difference Result 295 states and 489 transitions. [2025-03-09 01:46:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2025-03-09 01:46:26,433 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.76271186440678) internal successors, (163), 60 states have internal predecessors, (163), 16 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (43), 42 states have call predecessors, (43), 16 states have call successors, (43) Word has length 956 [2025-03-09 01:46:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:46:26,436 INFO L225 Difference]: With dead ends: 295 [2025-03-09 01:46:26,436 INFO L226 Difference]: Without dead ends: 294 [2025-03-09 01:46:26,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2037 GetRequests, 1892 SyntacticMatches, 69 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4958 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1297, Invalid=4709, Unknown=0, NotChecked=0, Total=6006 [2025-03-09 01:46:26,438 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 40 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 01:46:26,439 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 259 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 01:46:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2025-03-09 01:46:26,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 258. [2025-03-09 01:46:26,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 206 states have (on average 1.0242718446601942) internal successors, (211), 202 states have internal predecessors, (211), 30 states have call successors, (30), 14 states have call predecessors, (30), 21 states have return successors, (191), 41 states have call predecessors, (191), 29 states have call successors, (191) [2025-03-09 01:46:26,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 432 transitions. [2025-03-09 01:46:26,459 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 432 transitions. Word has length 956 [2025-03-09 01:46:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:46:26,461 INFO L471 AbstractCegarLoop]: Abstraction has 258 states and 432 transitions. [2025-03-09 01:46:26,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.76271186440678) internal successors, (163), 60 states have internal predecessors, (163), 16 states have call successors, (18), 1 states have call predecessors, (18), 18 states have return successors, (43), 42 states have call predecessors, (43), 16 states have call successors, (43) [2025-03-09 01:46:26,461 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 432 transitions. [2025-03-09 01:46:26,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1107 [2025-03-09 01:46:26,467 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:46:26,467 INFO L218 NwaCegarLoop]: trace histogram [113, 112, 91, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 56, 55, 35, 22, 1, 1, 1, 1, 1, 1] [2025-03-09 01:46:26,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-09 01:46:26,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:26,668 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:46:26,668 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:46:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash -960749566, now seen corresponding path program 13 times [2025-03-09 01:46:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:46:26,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334100768] [2025-03-09 01:46:26,669 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 01:46:26,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:46:26,685 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1106 statements into 1 equivalence classes. [2025-03-09 01:46:26,734 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1106 of 1106 statements. [2025-03-09 01:46:26,734 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:46:26,734 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 44583 backedges. 1508 proven. 7590 refuted. 0 times theorem prover too weak. 35485 trivial. 0 not checked. [2025-03-09 01:46:27,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:46:27,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334100768] [2025-03-09 01:46:27,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334100768] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:46:27,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812657898] [2025-03-09 01:46:27,529 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-09 01:46:27,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:27,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:46:27,531 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:46:27,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-09 01:46:27,773 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 1106 statements into 1 equivalence classes. [2025-03-09 01:46:27,896 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 1106 of 1106 statements. [2025-03-09 01:46:27,896 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:46:27,896 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:27,901 INFO L256 TraceCheckSpWp]: Trace formula consists of 2062 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-09 01:46:27,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:46:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 44583 backedges. 20335 proven. 1214 refuted. 0 times theorem prover too weak. 23034 trivial. 0 not checked. [2025-03-09 01:46:28,016 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:46:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 44583 backedges. 1502 proven. 8031 refuted. 0 times theorem prover too weak. 35050 trivial. 0 not checked. [2025-03-09 01:46:30,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812657898] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:46:30,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:46:30,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 23] total 28 [2025-03-09 01:46:30,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831676748] [2025-03-09 01:46:30,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:46:30,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-03-09 01:46:30,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:46:30,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-03-09 01:46:30,405 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2025-03-09 01:46:30,405 INFO L87 Difference]: Start difference. First operand 258 states and 432 transitions. Second operand has 28 states, 28 states have (on average 5.714285714285714) internal successors, (160), 28 states have internal predecessors, (160), 22 states have call successors, (27), 2 states have call predecessors, (27), 12 states have return successors, (34), 12 states have call predecessors, (34), 22 states have call successors, (34) [2025-03-09 01:46:30,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:46:30,687 INFO L93 Difference]: Finished difference Result 449 states and 859 transitions. [2025-03-09 01:46:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-03-09 01:46:30,687 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.714285714285714) internal successors, (160), 28 states have internal predecessors, (160), 22 states have call successors, (27), 2 states have call predecessors, (27), 12 states have return successors, (34), 12 states have call predecessors, (34), 22 states have call successors, (34) Word has length 1106 [2025-03-09 01:46:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:46:30,689 INFO L225 Difference]: With dead ends: 449 [2025-03-09 01:46:30,689 INFO L226 Difference]: Without dead ends: 198 [2025-03-09 01:46:30,692 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2249 GetRequests, 2197 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2025-03-09 01:46:30,693 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 142 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 01:46:30,693 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 240 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 01:46:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2025-03-09 01:46:30,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 165. [2025-03-09 01:46:30,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 130 states have internal predecessors, (135), 20 states have call successors, (20), 12 states have call predecessors, (20), 12 states have return successors, (83), 22 states have call predecessors, (83), 19 states have call successors, (83) [2025-03-09 01:46:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 238 transitions. [2025-03-09 01:46:30,709 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 238 transitions. Word has length 1106 [2025-03-09 01:46:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:46:30,709 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 238 transitions. [2025-03-09 01:46:30,710 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.714285714285714) internal successors, (160), 28 states have internal predecessors, (160), 22 states have call successors, (27), 2 states have call predecessors, (27), 12 states have return successors, (34), 12 states have call predecessors, (34), 22 states have call successors, (34) [2025-03-09 01:46:30,710 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 238 transitions. [2025-03-09 01:46:30,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1480 [2025-03-09 01:46:30,718 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:46:30,719 INFO L218 NwaCegarLoop]: trace histogram [151, 150, 122, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 75, 74, 47, 29, 1, 1, 1, 1, 1, 1] [2025-03-09 01:46:30,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-09 01:46:30,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:30,920 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:46:30,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:46:30,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1536363461, now seen corresponding path program 14 times [2025-03-09 01:46:30,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:46:30,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427454005] [2025-03-09 01:46:30,920 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:46:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:46:30,941 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1479 statements into 2 equivalence classes. [2025-03-09 01:46:31,009 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1479 of 1479 statements. [2025-03-09 01:46:31,009 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:46:31,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 80131 backedges. 2828 proven. 11650 refuted. 0 times theorem prover too weak. 65653 trivial. 0 not checked. [2025-03-09 01:46:32,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:46:32,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427454005] [2025-03-09 01:46:32,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427454005] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:46:32,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211615079] [2025-03-09 01:46:32,786 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:46:32,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:32,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:46:32,789 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:46:32,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-09 01:46:33,104 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 1479 statements into 2 equivalence classes. [2025-03-09 01:46:33,299 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 1479 of 1479 statements. [2025-03-09 01:46:33,299 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:46:33,299 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:33,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 2751 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-03-09 01:46:33,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:46:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 80131 backedges. 3345 proven. 13356 refuted. 0 times theorem prover too weak. 63430 trivial. 0 not checked. [2025-03-09 01:46:33,473 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:46:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 80131 backedges. 3345 proven. 13524 refuted. 0 times theorem prover too weak. 63262 trivial. 0 not checked. [2025-03-09 01:46:36,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211615079] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:46:36,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:46:36,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 31] total 36 [2025-03-09 01:46:36,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476651291] [2025-03-09 01:46:36,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:46:36,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-03-09 01:46:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:46:36,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-03-09 01:46:36,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2025-03-09 01:46:36,753 INFO L87 Difference]: Start difference. First operand 165 states and 238 transitions. Second operand has 36 states, 36 states have (on average 5.75) internal successors, (207), 36 states have internal predecessors, (207), 30 states have call successors, (35), 1 states have call predecessors, (35), 15 states have return successors, (46), 18 states have call predecessors, (46), 30 states have call successors, (46) [2025-03-09 01:46:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-03-09 01:46:37,245 INFO L93 Difference]: Finished difference Result 387 states and 643 transitions. [2025-03-09 01:46:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2025-03-09 01:46:37,246 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.75) internal successors, (207), 36 states have internal predecessors, (207), 30 states have call successors, (35), 1 states have call predecessors, (35), 15 states have return successors, (46), 18 states have call predecessors, (46), 30 states have call successors, (46) Word has length 1479 [2025-03-09 01:46:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-03-09 01:46:37,249 INFO L225 Difference]: With dead ends: 387 [2025-03-09 01:46:37,249 INFO L226 Difference]: Without dead ends: 229 [2025-03-09 01:46:37,251 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3019 GetRequests, 2939 SyntacticMatches, 15 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1076, Invalid=3346, Unknown=0, NotChecked=0, Total=4422 [2025-03-09 01:46:37,252 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 487 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-03-09 01:46:37,252 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 253 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-03-09 01:46:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2025-03-09 01:46:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 213. [2025-03-09 01:46:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 168 states have internal predecessors, (177), 26 states have call successors, (26), 17 states have call predecessors, (26), 14 states have return successors, (99), 27 states have call predecessors, (99), 25 states have call successors, (99) [2025-03-09 01:46:37,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 302 transitions. [2025-03-09 01:46:37,274 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 302 transitions. Word has length 1479 [2025-03-09 01:46:37,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-03-09 01:46:37,275 INFO L471 AbstractCegarLoop]: Abstraction has 213 states and 302 transitions. [2025-03-09 01:46:37,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.75) internal successors, (207), 36 states have internal predecessors, (207), 30 states have call successors, (35), 1 states have call predecessors, (35), 15 states have return successors, (46), 18 states have call predecessors, (46), 30 states have call successors, (46) [2025-03-09 01:46:37,275 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 302 transitions. [2025-03-09 01:46:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1715 [2025-03-09 01:46:37,290 INFO L210 NwaCegarLoop]: Found error trace [2025-03-09 01:46:37,290 INFO L218 NwaCegarLoop]: trace histogram [177, 171, 144, 90, 90, 90, 90, 86, 86, 86, 86, 86, 85, 85, 85, 84, 54, 33, 1, 1, 1, 1, 1, 1] [2025-03-09 01:46:37,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-03-09 01:46:37,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:37,491 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-03-09 01:46:37,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:46:37,492 INFO L85 PathProgramCache]: Analyzing trace with hash 614635755, now seen corresponding path program 15 times [2025-03-09 01:46:37,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:46:37,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018948306] [2025-03-09 01:46:37,492 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:46:37,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:46:37,526 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1714 statements into 124 equivalence classes. [2025-03-09 01:46:37,601 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) and asserted 1044 of 1714 statements. [2025-03-09 01:46:37,602 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2025-03-09 01:46:37,602 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:49,254 INFO L134 CoverageAnalysis]: Checked inductivity of 107863 backedges. 32910 proven. 9355 refuted. 0 times theorem prover too weak. 65598 trivial. 0 not checked. [2025-03-09 01:46:49,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:46:49,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018948306] [2025-03-09 01:46:49,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018948306] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:46:49,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51780888] [2025-03-09 01:46:49,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:46:49,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:46:49,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:46:49,256 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:46:49,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-09 01:46:49,593 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1714 statements into 124 equivalence classes. [2025-03-09 01:46:49,838 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) and asserted 1044 of 1714 statements. [2025-03-09 01:46:49,838 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 77 check-sat command(s) [2025-03-09 01:46:49,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:46:49,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 1951 conjuncts, 209 conjuncts are in the unsatisfiable core [2025-03-09 01:46:49,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:46:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 107863 backedges. 32368 proven. 7250 refuted. 0 times theorem prover too weak. 68245 trivial. 0 not checked. [2025-03-09 01:46:50,579 INFO L312 TraceCheckSpWp]: Computing backward predicates...