./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/Fibonacci05-overflow.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 551b0097 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/Fibonacci05-overflow.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7348520f04d4d9b10e62396a3389d8f9a2f3fbd69eb8f1a8953214a9bb54eb76 --- Real Ultimate output --- This is Ultimate 0.3.0-?-551b009-m [2025-01-10 02:30:59,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-01-10 02:30:59,061 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2025-01-10 02:30:59,068 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-01-10 02:30:59,068 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-01-10 02:30:59,088 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-01-10 02:30:59,089 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-01-10 02:30:59,090 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-01-10 02:30:59,090 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-01-10 02:30:59,090 INFO L153 SettingsManager]: * Use memory slicer=true [2025-01-10 02:30:59,091 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-01-10 02:30:59,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-01-10 02:30:59,091 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-01-10 02:30:59,091 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * Use SBE=true [2025-01-10 02:30:59,092 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * sizeof long=4 [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2025-01-10 02:30:59,092 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-01-10 02:30:59,093 INFO L153 SettingsManager]: * sizeof long double=12 [2025-01-10 02:30:59,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-01-10 02:30:59,093 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-01-10 02:30:59,093 INFO L153 SettingsManager]: * Use constant arrays=true [2025-01-10 02:30:59,093 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-01-10 02:30:59,093 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 02:30:59,093 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 02:30:59,093 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 02:30:59,093 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 02:30:59,093 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-01-10 02:30:59,093 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-01-10 02:30:59,094 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-01-10 02:30:59,094 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-01-10 02:30:59,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 02:30:59,094 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-01-10 02:30:59,094 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-01-10 02:30:59,094 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-01-10 02:30:59,094 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-01-10 02:30:59,094 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-01-10 02:30:59,094 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-01-10 02:30:59,094 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-01-10 02:30:59,095 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-01-10 02:30:59,095 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-01-10 02:30:59,095 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-01-10 02:30:59,095 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7348520f04d4d9b10e62396a3389d8f9a2f3fbd69eb8f1a8953214a9bb54eb76 [2025-01-10 02:30:59,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-01-10 02:30:59,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-01-10 02:30:59,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-01-10 02:30:59,311 INFO L270 PluginConnector]: Initializing CDTParser... [2025-01-10 02:30:59,311 INFO L274 PluginConnector]: CDTParser initialized [2025-01-10 02:30:59,312 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Fibonacci05-overflow.c [2025-01-10 02:31:00,405 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcc0a6934/3753cad8c56a4fe98bc6b1bebe9bdfba/FLAG3b7b6cf0b [2025-01-10 02:31:00,619 INFO L384 CDTParser]: Found 1 translation units. [2025-01-10 02:31:00,619 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/recursive/Fibonacci05-overflow.c [2025-01-10 02:31:00,624 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcc0a6934/3753cad8c56a4fe98bc6b1bebe9bdfba/FLAG3b7b6cf0b [2025-01-10 02:31:00,971 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/fcc0a6934/3753cad8c56a4fe98bc6b1bebe9bdfba [2025-01-10 02:31:00,973 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-01-10 02:31:00,974 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-01-10 02:31:00,975 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-01-10 02:31:00,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-01-10 02:31:00,979 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-01-10 02:31:00,979 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:31:00" (1/1) ... [2025-01-10 02:31:00,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e2e419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:00, skipping insertion in model container [2025-01-10 02:31:00,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.01 02:31:00" (1/1) ... [2025-01-10 02:31:00,995 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-01-10 02:31:01,090 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 02:31:01,099 INFO L200 MainTranslator]: Completed pre-run [2025-01-10 02:31:01,113 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-01-10 02:31:01,126 INFO L204 MainTranslator]: Completed translation [2025-01-10 02:31:01,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01 WrapperNode [2025-01-10 02:31:01,128 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-01-10 02:31:01,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-01-10 02:31:01,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-01-10 02:31:01,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-01-10 02:31:01,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,141 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,157 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2025-01-10 02:31:01,157 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-01-10 02:31:01,158 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-01-10 02:31:01,158 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-01-10 02:31:01,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-01-10 02:31:01,166 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,168 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,182 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]. [2025-01-10 02:31:01,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,184 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,184 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,186 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,187 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,190 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-01-10 02:31:01,191 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-01-10 02:31:01,191 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-01-10 02:31:01,191 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-01-10 02:31:01,192 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (1/1) ... [2025-01-10 02:31:01,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-01-10 02:31:01,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:01,218 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-01-10 02:31:01,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-01-10 02:31:01,239 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2025-01-10 02:31:01,240 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2025-01-10 02:31:01,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-01-10 02:31:01,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-01-10 02:31:01,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-01-10 02:31:01,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-01-10 02:31:01,285 INFO L234 CfgBuilder]: Building ICFG [2025-01-10 02:31:01,287 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-01-10 02:31:01,365 INFO L? ?]: Removed 16 outVars from TransFormulas that were not future-live. [2025-01-10 02:31:01,365 INFO L283 CfgBuilder]: Performing block encoding [2025-01-10 02:31:01,370 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-01-10 02:31:01,371 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-01-10 02:31:01,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:01 BoogieIcfgContainer [2025-01-10 02:31:01,371 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-01-10 02:31:01,374 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-01-10 02:31:01,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-01-10 02:31:01,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-01-10 02:31:01,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.01 02:31:00" (1/3) ... [2025-01-10 02:31:01,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd9679a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:31:01, skipping insertion in model container [2025-01-10 02:31:01,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.01 02:31:01" (2/3) ... [2025-01-10 02:31:01,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd9679a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.01 02:31:01, skipping insertion in model container [2025-01-10 02:31:01,379 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.01 02:31:01" (3/3) ... [2025-01-10 02:31:01,380 INFO L128 eAbstractionObserver]: Analyzing ICFG Fibonacci05-overflow.c [2025-01-10 02:31:01,390 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-01-10 02:31:01,391 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG Fibonacci05-overflow.c that has 2 procedures, 31 locations, 1 initial locations, 0 loop locations, and 6 error locations. [2025-01-10 02:31:01,422 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-01-10 02:31:01,434 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;@659f1d13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-01-10 02:31:01,435 INFO L334 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2025-01-10 02:31:01,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.45) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2025-01-10 02:31:01,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2025-01-10 02:31:01,443 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:01,443 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-01-10 02:31:01,444 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:01,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash -106871919, now seen corresponding path program 1 times [2025-01-10 02:31:01,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:01,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098162611] [2025-01-10 02:31:01,453 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:01,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:01,493 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-01-10 02:31:01,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-01-10 02:31:01,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:01,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 02:31:01,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:01,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098162611] [2025-01-10 02:31:01,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098162611] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 02:31:01,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 02:31:01,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-01-10 02:31:01,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789426686] [2025-01-10 02:31:01,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 02:31:01,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-01-10 02:31:01,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:01,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-01-10 02:31:01,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-01-10 02:31:01,575 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.45) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 02:31:01,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:01,611 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2025-01-10 02:31:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-01-10 02:31:01,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2025-01-10 02:31:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:01,617 INFO L225 Difference]: With dead ends: 36 [2025-01-10 02:31:01,618 INFO L226 Difference]: Without dead ends: 24 [2025-01-10 02:31:01,620 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 [2025-01-10 02:31:01,623 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:01,625 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 02:31:01,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2025-01-10 02:31:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2025-01-10 02:31:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 02:31:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2025-01-10 02:31:01,654 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2025-01-10 02:31:01,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:01,655 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2025-01-10 02:31:01,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 02:31:01,656 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2025-01-10 02:31:01,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2025-01-10 02:31:01,657 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:01,657 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 02:31:01,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-01-10 02:31:01,657 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:01,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:01,658 INFO L85 PathProgramCache]: Analyzing trace with hash 981937849, now seen corresponding path program 1 times [2025-01-10 02:31:01,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:01,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886327269] [2025-01-10 02:31:01,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:01,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:01,664 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-01-10 02:31:01,674 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-01-10 02:31:01,678 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:01,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:01,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-01-10 02:31:01,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:01,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886327269] [2025-01-10 02:31:01,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886327269] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 02:31:01,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 02:31:01,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 02:31:01,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241007780] [2025-01-10 02:31:01,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 02:31:01,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 02:31:01,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:01,731 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 02:31:01,731 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-01-10 02:31:01,732 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 02:31:01,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:01,782 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2025-01-10 02:31:01,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 02:31:01,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2025-01-10 02:31:01,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:01,783 INFO L225 Difference]: With dead ends: 24 [2025-01-10 02:31:01,783 INFO L226 Difference]: Without dead ends: 22 [2025-01-10 02:31:01,783 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 [2025-01-10 02:31:01,784 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:01,784 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 02:31:01,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2025-01-10 02:31:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2025-01-10 02:31:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 02:31:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2025-01-10 02:31:01,787 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 8 [2025-01-10 02:31:01,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:01,788 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2025-01-10 02:31:01,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-01-10 02:31:01,788 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2025-01-10 02:31:01,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2025-01-10 02:31:01,790 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:01,790 INFO L218 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 02:31:01,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-01-10 02:31:01,790 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:01,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:01,791 INFO L85 PathProgramCache]: Analyzing trace with hash -590814878, now seen corresponding path program 1 times [2025-01-10 02:31:01,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:01,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704389741] [2025-01-10 02:31:01,791 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:01,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:01,801 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-01-10 02:31:01,810 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-01-10 02:31:01,810 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:01,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-10 02:31:01,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:01,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704389741] [2025-01-10 02:31:01,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704389741] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 02:31:01,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-01-10 02:31:01,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-01-10 02:31:01,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496027056] [2025-01-10 02:31:01,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 02:31:01,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 02:31:01,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:01,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 02:31:01,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-01-10 02:31:01,950 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 02:31:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:01,987 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2025-01-10 02:31:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 02:31:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2025-01-10 02:31:01,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:01,988 INFO L225 Difference]: With dead ends: 34 [2025-01-10 02:31:01,988 INFO L226 Difference]: Without dead ends: 32 [2025-01-10 02:31:01,988 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 [2025-01-10 02:31:01,988 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 4 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 52 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 [2025-01-10 02:31:01,988 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 02:31:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2025-01-10 02:31:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2025-01-10 02:31:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2025-01-10 02:31:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2025-01-10 02:31:01,996 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 29 [2025-01-10 02:31:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:01,997 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2025-01-10 02:31:01,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 02:31:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2025-01-10 02:31:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-10 02:31:01,998 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:01,998 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 02:31:01,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-01-10 02:31:01,998 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:01,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:01,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1274820555, now seen corresponding path program 1 times [2025-01-10 02:31:01,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:01,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237558527] [2025-01-10 02:31:01,998 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:01,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:02,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 02:31:02,013 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 02:31:02,013 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:02,013 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:02,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-10 02:31:02,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:02,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237558527] [2025-01-10 02:31:02,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237558527] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:02,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547369549] [2025-01-10 02:31:02,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:02,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:02,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:02,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:02,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-01-10 02:31:02,143 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-01-10 02:31:02,152 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 02:31:02,153 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:02,153 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:02,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-01-10 02:31:02,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 02:31:02,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-01-10 02:31:02,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547369549] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:02,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:02,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2025-01-10 02:31:02,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916319071] [2025-01-10 02:31:02,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:02,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-01-10 02:31:02,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:02,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-01-10 02:31:02,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-01-10 02:31:02,394 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-01-10 02:31:02,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:02,612 INFO L93 Difference]: Finished difference Result 90 states and 128 transitions. [2025-01-10 02:31:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-01-10 02:31:02,613 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 24 [2025-01-10 02:31:02,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:02,613 INFO L225 Difference]: With dead ends: 90 [2025-01-10 02:31:02,614 INFO L226 Difference]: Without dead ends: 64 [2025-01-10 02:31:02,614 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2025-01-10 02:31:02,615 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:02,615 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 94 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 02:31:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-01-10 02:31:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2025-01-10 02:31:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 8 states have call predecessors, (18), 6 states have call successors, (18) [2025-01-10 02:31:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2025-01-10 02:31:02,633 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 24 [2025-01-10 02:31:02,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:02,633 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2025-01-10 02:31:02,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2025-01-10 02:31:02,633 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2025-01-10 02:31:02,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2025-01-10 02:31:02,635 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:02,635 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 02:31:02,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:02,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:02,839 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:02,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:02,840 INFO L85 PathProgramCache]: Analyzing trace with hash -254150789, now seen corresponding path program 2 times [2025-01-10 02:31:02,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:02,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26524191] [2025-01-10 02:31:02,840 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 02:31:02,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:02,845 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-10 02:31:02,851 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 02:31:02,853 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 02:31:02,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-10 02:31:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:02,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26524191] [2025-01-10 02:31:02,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26524191] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:02,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145587832] [2025-01-10 02:31:02,949 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 02:31:02,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:02,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:02,951 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:02,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-01-10 02:31:02,971 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-01-10 02:31:02,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-01-10 02:31:02,979 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 02:31:02,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:02,979 INFO L256 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-01-10 02:31:02,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-01-10 02:31:03,014 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 02:31:03,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145587832] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 02:31:03,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 02:31:03,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2025-01-10 02:31:03,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636677693] [2025-01-10 02:31:03,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 02:31:03,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-01-10 02:31:03,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:03,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-01-10 02:31:03,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-01-10 02:31:03,016 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 02:31:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:03,039 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2025-01-10 02:31:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-01-10 02:31:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2025-01-10 02:31:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:03,043 INFO L225 Difference]: With dead ends: 59 [2025-01-10 02:31:03,043 INFO L226 Difference]: Without dead ends: 58 [2025-01-10 02:31:03,043 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-01-10 02:31:03,044 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:03,044 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 61 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 02:31:03,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2025-01-10 02:31:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2025-01-10 02:31:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.1) internal successors, (44), 42 states have internal predecessors, (44), 7 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (18), 9 states have call predecessors, (18), 6 states have call successors, (18) [2025-01-10 02:31:03,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2025-01-10 02:31:03,052 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 24 [2025-01-10 02:31:03,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:03,052 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2025-01-10 02:31:03,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 02:31:03,052 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2025-01-10 02:31:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2025-01-10 02:31:03,053 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:03,053 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-01-10 02:31:03,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-01-10 02:31:03,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:03,257 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:03,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:03,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1092136320, now seen corresponding path program 1 times [2025-01-10 02:31:03,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:03,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853337299] [2025-01-10 02:31:03,257 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:03,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:03,261 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-10 02:31:03,264 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-10 02:31:03,265 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:03,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-10 02:31:03,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:03,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853337299] [2025-01-10 02:31:03,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853337299] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:03,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028962161] [2025-01-10 02:31:03,331 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:03,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:03,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:03,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:03,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-01-10 02:31:03,359 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-01-10 02:31:03,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-01-10 02:31:03,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:03,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:03,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-01-10 02:31:03,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:03,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-01-10 02:31:03,420 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-01-10 02:31:03,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028962161] provided 1 perfect and 0 imperfect interpolant sequences [2025-01-10 02:31:03,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-01-10 02:31:03,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-01-10 02:31:03,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175952304] [2025-01-10 02:31:03,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-01-10 02:31:03,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-01-10 02:31:03,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:03,421 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-01-10 02:31:03,421 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-01-10 02:31:03,421 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 02:31:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:03,452 INFO L93 Difference]: Finished difference Result 81 states and 116 transitions. [2025-01-10 02:31:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 02:31:03,452 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2025-01-10 02:31:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:03,454 INFO L225 Difference]: With dead ends: 81 [2025-01-10 02:31:03,454 INFO L226 Difference]: Without dead ends: 80 [2025-01-10 02:31:03,455 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2025-01-10 02:31:03,455 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:03,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2025-01-10 02:31:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2025-01-10 02:31:03,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2025-01-10 02:31:03,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 49 states have internal predecessors, (51), 8 states have call successors, (8), 2 states have call predecessors, (8), 6 states have return successors, (27), 11 states have call predecessors, (27), 7 states have call successors, (27) [2025-01-10 02:31:03,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2025-01-10 02:31:03,466 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 31 [2025-01-10 02:31:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:03,467 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2025-01-10 02:31:03,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2025-01-10 02:31:03,467 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2025-01-10 02:31:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2025-01-10 02:31:03,468 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:03,468 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2025-01-10 02:31:03,474 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-01-10 02:31:03,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:03,672 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:03,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash -940023341, now seen corresponding path program 1 times [2025-01-10 02:31:03,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:03,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062689474] [2025-01-10 02:31:03,673 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:03,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:03,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-10 02:31:03,681 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-10 02:31:03,681 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:03,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2025-01-10 02:31:03,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062689474] [2025-01-10 02:31:03,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062689474] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231997438] [2025-01-10 02:31:03,785 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:03,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:03,789 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:03,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-01-10 02:31:03,813 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 51 statements into 1 equivalence classes. [2025-01-10 02:31:03,828 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 51 of 51 statements. [2025-01-10 02:31:03,828 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:03,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:03,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-01-10 02:31:03,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2025-01-10 02:31:03,911 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2025-01-10 02:31:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231997438] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:04,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:04,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 15 [2025-01-10 02:31:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186541057] [2025-01-10 02:31:04,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:04,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-01-10 02:31:04,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:04,087 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-01-10 02:31:04,087 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2025-01-10 02:31:04,087 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-01-10 02:31:04,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:04,264 INFO L93 Difference]: Finished difference Result 140 states and 216 transitions. [2025-01-10 02:31:04,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-10 02:31:04,264 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) Word has length 51 [2025-01-10 02:31:04,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:04,266 INFO L225 Difference]: With dead ends: 140 [2025-01-10 02:31:04,266 INFO L226 Difference]: Without dead ends: 138 [2025-01-10 02:31:04,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2025-01-10 02:31:04,269 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 14 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:04,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 185 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 02:31:04,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2025-01-10 02:31:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 97. [2025-01-10 02:31:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 11 states have call successors, (11), 2 states have call predecessors, (11), 9 states have return successors, (66), 20 states have call predecessors, (66), 10 states have call successors, (66) [2025-01-10 02:31:04,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 158 transitions. [2025-01-10 02:31:04,284 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 158 transitions. Word has length 51 [2025-01-10 02:31:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:04,284 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 158 transitions. [2025-01-10 02:31:04,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 16 states have internal predecessors, (44), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (9), 9 states have call predecessors, (9), 4 states have call successors, (9) [2025-01-10 02:31:04,285 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 158 transitions. [2025-01-10 02:31:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2025-01-10 02:31:04,286 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:04,286 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] [2025-01-10 02:31:04,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-01-10 02:31:04,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-01-10 02:31:04,491 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:04,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:04,491 INFO L85 PathProgramCache]: Analyzing trace with hash 224057702, now seen corresponding path program 1 times [2025-01-10 02:31:04,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:04,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658422186] [2025-01-10 02:31:04,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:04,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:04,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-01-10 02:31:04,502 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-01-10 02:31:04,502 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:04,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:04,620 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 37 proven. 46 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2025-01-10 02:31:04,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:04,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658422186] [2025-01-10 02:31:04,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658422186] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:04,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694604845] [2025-01-10 02:31:04,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-01-10 02:31:04,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:04,623 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:04,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-01-10 02:31:04,652 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 68 statements into 1 equivalence classes. [2025-01-10 02:31:04,667 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 68 of 68 statements. [2025-01-10 02:31:04,667 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:04,667 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:04,668 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 02:31:04,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-01-10 02:31:04,755 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 2 proven. 31 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2025-01-10 02:31:04,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694604845] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:04,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:04,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 18 [2025-01-10 02:31:04,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062374237] [2025-01-10 02:31:04,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:04,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-01-10 02:31:04,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:04,950 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-01-10 02:31:04,950 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2025-01-10 02:31:04,950 INFO L87 Difference]: Start difference. First operand 97 states and 158 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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) [2025-01-10 02:31:05,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:05,468 INFO L93 Difference]: Finished difference Result 256 states and 503 transitions. [2025-01-10 02:31:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-01-10 02:31:05,470 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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 68 [2025-01-10 02:31:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:05,472 INFO L225 Difference]: With dead ends: 256 [2025-01-10 02:31:05,475 INFO L226 Difference]: Without dead ends: 162 [2025-01-10 02:31:05,477 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1473, Unknown=0, NotChecked=0, Total=1892 [2025-01-10 02:31:05,478 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 92 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:05,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 67 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 02:31:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2025-01-10 02:31:05,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 102. [2025-01-10 02:31:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 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) [2025-01-10 02:31:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 170 transitions. [2025-01-10 02:31:05,503 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 170 transitions. Word has length 68 [2025-01-10 02:31:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:05,503 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 170 transitions. [2025-01-10 02:31:05,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 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) [2025-01-10 02:31:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 170 transitions. [2025-01-10 02:31:05,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2025-01-10 02:31:05,506 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:05,507 INFO L218 NwaCegarLoop]: trace histogram [14, 12, 10, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1] [2025-01-10 02:31:05,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-01-10 02:31:05,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:05,707 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:05,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:05,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1680089033, now seen corresponding path program 2 times [2025-01-10 02:31:05,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:05,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541129834] [2025-01-10 02:31:05,708 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 02:31:05,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:05,713 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 128 statements into 2 equivalence classes. [2025-01-10 02:31:05,722 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 128 of 128 statements. [2025-01-10 02:31:05,722 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 02:31:05,722 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 35 proven. 126 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2025-01-10 02:31:05,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:05,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541129834] [2025-01-10 02:31:05,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541129834] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:05,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056713147] [2025-01-10 02:31:05,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 02:31:05,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:05,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:05,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-01-10 02:31:05,836 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 128 statements into 2 equivalence classes. [2025-01-10 02:31:05,858 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 128 of 128 statements. [2025-01-10 02:31:05,859 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 02:31:05,859 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:05,860 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-01-10 02:31:05,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 9 proven. 130 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2025-01-10 02:31:05,930 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 9 proven. 130 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2025-01-10 02:31:06,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056713147] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:06,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:06,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2025-01-10 02:31:06,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613452784] [2025-01-10 02:31:06,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:06,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 02:31:06,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:06,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 02:31:06,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2025-01-10 02:31:06,261 INFO L87 Difference]: Start difference. First operand 102 states and 170 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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) [2025-01-10 02:31:06,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:06,351 INFO L93 Difference]: Finished difference Result 161 states and 277 transitions. [2025-01-10 02:31:06,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-01-10 02:31:06,353 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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 128 [2025-01-10 02:31:06,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:06,354 INFO L225 Difference]: With dead ends: 161 [2025-01-10 02:31:06,354 INFO L226 Difference]: Without dead ends: 62 [2025-01-10 02:31:06,355 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 244 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2025-01-10 02:31:06,355 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 20 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 74 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 [2025-01-10 02:31:06,356 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 74 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 02:31:06,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2025-01-10 02:31:06,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2025-01-10 02:31:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 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) [2025-01-10 02:31:06,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 85 transitions. [2025-01-10 02:31:06,368 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 85 transitions. Word has length 128 [2025-01-10 02:31:06,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:06,368 INFO L471 AbstractCegarLoop]: Abstraction has 62 states and 85 transitions. [2025-01-10 02:31:06,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 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) [2025-01-10 02:31:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 85 transitions. [2025-01-10 02:31:06,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2025-01-10 02:31:06,372 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:06,372 INFO L218 NwaCegarLoop]: trace histogram [19, 17, 14, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 7, 5, 5, 1, 1, 1, 1] [2025-01-10 02:31:06,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:06,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2025-01-10 02:31:06,574 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:06,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2012053566, now seen corresponding path program 3 times [2025-01-10 02:31:06,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:06,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136207422] [2025-01-10 02:31:06,575 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 02:31:06,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:06,585 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 176 statements into 17 equivalence classes. [2025-01-10 02:31:06,593 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 70 of 176 statements. [2025-01-10 02:31:06,594 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-10 02:31:06,594 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:06,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 319 proven. 18 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2025-01-10 02:31:06,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136207422] [2025-01-10 02:31:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136207422] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225771202] [2025-01-10 02:31:06,665 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 02:31:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:06,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:06,667 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:06,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-01-10 02:31:06,699 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 176 statements into 17 equivalence classes. [2025-01-10 02:31:06,713 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 70 of 176 statements. [2025-01-10 02:31:06,713 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-01-10 02:31:06,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:06,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-01-10 02:31:06,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 316 proven. 21 refuted. 0 times theorem prover too weak. 704 trivial. 0 not checked. [2025-01-10 02:31:06,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 316 proven. 22 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2025-01-10 02:31:07,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225771202] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:07,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:07,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 12 [2025-01-10 02:31:07,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342159577] [2025-01-10 02:31:07,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:07,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-01-10 02:31:07,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:07,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-01-10 02:31:07,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2025-01-10 02:31:07,055 INFO L87 Difference]: Start difference. First operand 62 states and 85 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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) [2025-01-10 02:31:07,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:07,144 INFO L93 Difference]: Finished difference Result 123 states and 178 transitions. [2025-01-10 02:31:07,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-01-10 02:31:07,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 176 [2025-01-10 02:31:07,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:07,145 INFO L225 Difference]: With dead ends: 123 [2025-01-10 02:31:07,145 INFO L226 Difference]: Without dead ends: 64 [2025-01-10 02:31:07,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 346 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2025-01-10 02:31:07,146 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:07,146 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 80 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 02:31:07,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2025-01-10 02:31:07,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2025-01-10 02:31:07,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.08) internal successors, (54), 49 states have internal predecessors, (54), 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) [2025-01-10 02:31:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2025-01-10 02:31:07,152 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 176 [2025-01-10 02:31:07,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:07,152 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2025-01-10 02:31:07,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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) [2025-01-10 02:31:07,152 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2025-01-10 02:31:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2025-01-10 02:31:07,153 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:07,153 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] [2025-01-10 02:31:07,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:07,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:07,354 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:07,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:07,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1067637415, now seen corresponding path program 4 times [2025-01-10 02:31:07,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:07,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106272100] [2025-01-10 02:31:07,355 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 02:31:07,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:07,360 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 104 statements into 2 equivalence classes. [2025-01-10 02:31:07,364 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 62 of 104 statements. [2025-01-10 02:31:07,365 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 02:31:07,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 72 proven. 159 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2025-01-10 02:31:07,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106272100] [2025-01-10 02:31:07,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106272100] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:07,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977263977] [2025-01-10 02:31:07,491 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 02:31:07,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:07,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:07,497 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:07,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-01-10 02:31:07,529 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 104 statements into 2 equivalence classes. [2025-01-10 02:31:07,542 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 62 of 104 statements. [2025-01-10 02:31:07,542 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 02:31:07,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:07,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-01-10 02:31:07,545 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 82 proven. 158 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2025-01-10 02:31:07,650 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 82 proven. 174 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2025-01-10 02:31:08,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977263977] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:08,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:08,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 20 [2025-01-10 02:31:08,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904409088] [2025-01-10 02:31:08,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:08,111 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-01-10 02:31:08,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:08,112 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-01-10 02:31:08,112 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2025-01-10 02:31:08,112 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 13 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-01-10 02:31:08,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:08,325 INFO L93 Difference]: Finished difference Result 133 states and 180 transitions. [2025-01-10 02:31:08,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-10 02:31:08,325 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 13 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) Word has length 104 [2025-01-10 02:31:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:08,326 INFO L225 Difference]: With dead ends: 133 [2025-01-10 02:31:08,326 INFO L226 Difference]: Without dead ends: 72 [2025-01-10 02:31:08,327 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 200 SyntacticMatches, 7 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2025-01-10 02:31:08,327 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 142 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:08,328 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 79 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 02:31:08,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2025-01-10 02:31:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2025-01-10 02:31:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 47 states have internal predecessors, (52), 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) [2025-01-10 02:31:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2025-01-10 02:31:08,338 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 104 [2025-01-10 02:31:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:08,338 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2025-01-10 02:31:08,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 13 states have call successors, (15), 1 states have call predecessors, (15), 7 states have return successors, (16), 7 states have call predecessors, (16), 13 states have call successors, (16) [2025-01-10 02:31:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2025-01-10 02:31:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2025-01-10 02:31:08,340 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:08,340 INFO L218 NwaCegarLoop]: trace histogram [24, 21, 19, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 10, 9, 7, 5, 1, 1, 1, 1] [2025-01-10 02:31:08,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-01-10 02:31:08,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:08,541 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:08,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:08,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1082487391, now seen corresponding path program 5 times [2025-01-10 02:31:08,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:08,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465189972] [2025-01-10 02:31:08,542 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 02:31:08,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:08,549 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 222 statements into 15 equivalence classes. [2025-01-10 02:31:08,567 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 143 of 222 statements. [2025-01-10 02:31:08,568 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-01-10 02:31:08,568 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 329 proven. 501 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2025-01-10 02:31:08,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:08,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465189972] [2025-01-10 02:31:08,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465189972] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:08,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912718497] [2025-01-10 02:31:08,803 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 02:31:08,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:08,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:08,805 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:08,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-01-10 02:31:08,841 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 222 statements into 15 equivalence classes. [2025-01-10 02:31:08,864 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) and asserted 143 of 222 statements. [2025-01-10 02:31:08,865 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2025-01-10 02:31:08,865 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:08,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-01-10 02:31:08,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 689 proven. 384 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2025-01-10 02:31:08,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1696 backedges. 330 proven. 509 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2025-01-10 02:31:09,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912718497] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:09,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 15] total 21 [2025-01-10 02:31:09,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285316747] [2025-01-10 02:31:09,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:09,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 02:31:09,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:09,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 02:31:09,454 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-01-10 02:31:09,454 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 21 states, 21 states have (on average 5.476190476190476) internal successors, (115), 21 states have internal predecessors, (115), 13 states have call successors, (21), 3 states have call predecessors, (21), 7 states have return successors, (21), 10 states have call predecessors, (21), 12 states have call successors, (21) [2025-01-10 02:31:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:09,678 INFO L93 Difference]: Finished difference Result 142 states and 172 transitions. [2025-01-10 02:31:09,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-01-10 02:31:09,678 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), 13 states have call successors, (21), 3 states have call predecessors, (21), 7 states have return successors, (21), 10 states have call predecessors, (21), 12 states have call successors, (21) Word has length 222 [2025-01-10 02:31:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:09,679 INFO L225 Difference]: With dead ends: 142 [2025-01-10 02:31:09,679 INFO L226 Difference]: Without dead ends: 86 [2025-01-10 02:31:09,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 434 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2025-01-10 02:31:09,680 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 115 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:09,680 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 92 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 02:31:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2025-01-10 02:31:09,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2025-01-10 02:31:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2025-01-10 02:31:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 88 transitions. [2025-01-10 02:31:09,686 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 88 transitions. Word has length 222 [2025-01-10 02:31:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:09,686 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 88 transitions. [2025-01-10 02:31:09,686 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), 13 states have call successors, (21), 3 states have call predecessors, (21), 7 states have return successors, (21), 10 states have call predecessors, (21), 12 states have call successors, (21) [2025-01-10 02:31:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 88 transitions. [2025-01-10 02:31:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2025-01-10 02:31:09,687 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:09,687 INFO L218 NwaCegarLoop]: trace histogram [14, 12, 11, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 3, 1, 1, 1, 1] [2025-01-10 02:31:09,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:09,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:09,888 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:09,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:09,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1403863811, now seen corresponding path program 6 times [2025-01-10 02:31:09,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:09,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612666947] [2025-01-10 02:31:09,889 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 02:31:09,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:09,893 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 129 statements into 9 equivalence classes. [2025-01-10 02:31:09,909 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 129 of 129 statements. [2025-01-10 02:31:09,909 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-01-10 02:31:09,909 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:10,030 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 183 proven. 132 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2025-01-10 02:31:10,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:10,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612666947] [2025-01-10 02:31:10,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612666947] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:10,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432343966] [2025-01-10 02:31:10,031 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 02:31:10,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:10,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:10,034 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:10,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-01-10 02:31:10,064 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 129 statements into 9 equivalence classes. [2025-01-10 02:31:10,087 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) and asserted 129 of 129 statements. [2025-01-10 02:31:10,087 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2025-01-10 02:31:10,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:10,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 25 conjuncts are in the unsatisfiable core [2025-01-10 02:31:10,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 61 proven. 95 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2025-01-10 02:31:10,262 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:11,082 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 103 proven. 95 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2025-01-10 02:31:11,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432343966] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:11,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:11,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 33 [2025-01-10 02:31:11,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174182748] [2025-01-10 02:31:11,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:11,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2025-01-10 02:31:11,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:11,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2025-01-10 02:31:11,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=897, Unknown=0, NotChecked=0, Total=1056 [2025-01-10 02:31:11,085 INFO L87 Difference]: Start difference. First operand 73 states and 88 transitions. Second operand has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 11 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 23 states have call predecessors, (25), 11 states have call successors, (25) [2025-01-10 02:31:11,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:11,666 INFO L93 Difference]: Finished difference Result 196 states and 262 transitions. [2025-01-10 02:31:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-10 02:31:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 11 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 23 states have call predecessors, (25), 11 states have call successors, (25) Word has length 129 [2025-01-10 02:31:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:11,668 INFO L225 Difference]: With dead ends: 196 [2025-01-10 02:31:11,668 INFO L226 Difference]: Without dead ends: 122 [2025-01-10 02:31:11,669 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 229 SyntacticMatches, 10 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=501, Invalid=2469, Unknown=0, NotChecked=0, Total=2970 [2025-01-10 02:31:11,671 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 164 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:11,672 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 116 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-10 02:31:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2025-01-10 02:31:11,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2025-01-10 02:31:11,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 76 states have internal predecessors, (82), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (26), 12 states have call predecessors, (26), 11 states have call successors, (26) [2025-01-10 02:31:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 120 transitions. [2025-01-10 02:31:11,683 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 120 transitions. Word has length 129 [2025-01-10 02:31:11,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:11,683 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 120 transitions. [2025-01-10 02:31:11,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.4545454545454546) internal successors, (114), 33 states have internal predecessors, (114), 11 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 23 states have call predecessors, (25), 11 states have call successors, (25) [2025-01-10 02:31:11,683 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 120 transitions. [2025-01-10 02:31:11,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2025-01-10 02:31:11,686 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:11,686 INFO L218 NwaCegarLoop]: trace histogram [31, 30, 25, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 6, 1, 1, 1, 1] [2025-01-10 02:31:11,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:11,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-01-10 02:31:11,890 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:11,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:11,890 INFO L85 PathProgramCache]: Analyzing trace with hash 857591595, now seen corresponding path program 7 times [2025-01-10 02:31:11,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:11,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109067490] [2025-01-10 02:31:11,891 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 02:31:11,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:11,900 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 300 statements into 1 equivalence classes. [2025-01-10 02:31:11,918 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 300 of 300 statements. [2025-01-10 02:31:11,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:11,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:12,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 484 proven. 1076 refuted. 0 times theorem prover too weak. 1590 trivial. 0 not checked. [2025-01-10 02:31:12,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:12,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109067490] [2025-01-10 02:31:12,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109067490] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:12,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669233631] [2025-01-10 02:31:12,296 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 02:31:12,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:12,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:12,299 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:12,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-01-10 02:31:12,351 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 300 statements into 1 equivalence classes. [2025-01-10 02:31:12,400 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 300 of 300 statements. [2025-01-10 02:31:12,400 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:12,400 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:12,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-10 02:31:12,410 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 569 proven. 1181 refuted. 0 times theorem prover too weak. 1400 trivial. 0 not checked. [2025-01-10 02:31:12,553 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 569 proven. 1253 refuted. 0 times theorem prover too weak. 1328 trivial. 0 not checked. [2025-01-10 02:31:13,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669233631] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:13,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:13,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-01-10 02:31:13,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97604646] [2025-01-10 02:31:13,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:13,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-10 02:31:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:13,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-10 02:31:13,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2025-01-10 02:31:13,742 INFO L87 Difference]: Start difference. First operand 97 states and 120 transitions. Second operand has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 28 states have internal predecessors, (149), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-01-10 02:31:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:14,082 INFO L93 Difference]: Finished difference Result 235 states and 313 transitions. [2025-01-10 02:31:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-10 02:31:14,082 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 28 states have internal predecessors, (149), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) Word has length 300 [2025-01-10 02:31:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:14,085 INFO L225 Difference]: With dead ends: 235 [2025-01-10 02:31:14,085 INFO L226 Difference]: Without dead ends: 143 [2025-01-10 02:31:14,086 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 585 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=604, Invalid=1748, Unknown=0, NotChecked=0, Total=2352 [2025-01-10 02:31:14,087 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 353 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:14,087 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 146 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 02:31:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2025-01-10 02:31:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 121. [2025-01-10 02:31:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 94 states have internal predecessors, (103), 14 states have call successors, (14), 11 states have call predecessors, (14), 8 states have return successors, (32), 15 states have call predecessors, (32), 13 states have call successors, (32) [2025-01-10 02:31:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2025-01-10 02:31:14,098 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 300 [2025-01-10 02:31:14,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:14,099 INFO L471 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2025-01-10 02:31:14,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 28 states have internal predecessors, (149), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-01-10 02:31:14,099 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2025-01-10 02:31:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2025-01-10 02:31:14,102 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:14,102 INFO L218 NwaCegarLoop]: trace histogram [32, 30, 26, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 10, 6, 1, 1, 1, 1] [2025-01-10 02:31:14,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:14,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-01-10 02:31:14,307 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:14,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:14,307 INFO L85 PathProgramCache]: Analyzing trace with hash -303289904, now seen corresponding path program 8 times [2025-01-10 02:31:14,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:14,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109370467] [2025-01-10 02:31:14,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 02:31:14,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:14,314 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 306 statements into 2 equivalence classes. [2025-01-10 02:31:14,339 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 306 of 306 statements. [2025-01-10 02:31:14,342 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 02:31:14,342 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:14,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 554 proven. 990 refuted. 0 times theorem prover too weak. 1738 trivial. 0 not checked. [2025-01-10 02:31:14,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:14,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109370467] [2025-01-10 02:31:14,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109370467] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:14,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703383947] [2025-01-10 02:31:14,606 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 02:31:14,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:14,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:14,608 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:14,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-01-10 02:31:14,665 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 306 statements into 2 equivalence classes. [2025-01-10 02:31:14,708 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 306 of 306 statements. [2025-01-10 02:31:14,709 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 02:31:14,709 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:14,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 02:31:14,713 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 1858 proven. 484 refuted. 0 times theorem prover too weak. 940 trivial. 0 not checked. [2025-01-10 02:31:14,806 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:15,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 551 proven. 1101 refuted. 0 times theorem prover too weak. 1630 trivial. 0 not checked. [2025-01-10 02:31:15,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703383947] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:15,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:15,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 19] total 24 [2025-01-10 02:31:15,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922809950] [2025-01-10 02:31:15,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:15,869 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-01-10 02:31:15,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:15,871 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-01-10 02:31:15,871 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2025-01-10 02:31:15,871 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 18 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) [2025-01-10 02:31:16,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:16,107 INFO L93 Difference]: Finished difference Result 234 states and 299 transitions. [2025-01-10 02:31:16,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-01-10 02:31:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 18 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) Word has length 306 [2025-01-10 02:31:16,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:16,111 INFO L225 Difference]: With dead ends: 234 [2025-01-10 02:31:16,111 INFO L226 Difference]: Without dead ends: 118 [2025-01-10 02:31:16,112 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 599 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=911, Unknown=0, NotChecked=0, Total=1260 [2025-01-10 02:31:16,112 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 78 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:16,113 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 171 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 02:31:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2025-01-10 02:31:16,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2025-01-10 02:31:16,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 85 states have (on average 1.035294117647059) internal successors, (88), 83 states have internal predecessors, (88), 13 states have call successors, (13), 10 states have call predecessors, (13), 7 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2025-01-10 02:31:16,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2025-01-10 02:31:16,122 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 306 [2025-01-10 02:31:16,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:16,123 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2025-01-10 02:31:16,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.583333333333333) internal successors, (134), 24 states have internal predecessors, (134), 18 states have call successors, (23), 2 states have call predecessors, (23), 10 states have return successors, (28), 10 states have call predecessors, (28), 18 states have call successors, (28) [2025-01-10 02:31:16,123 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2025-01-10 02:31:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2025-01-10 02:31:16,127 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:16,127 INFO L218 NwaCegarLoop]: trace histogram [51, 50, 41, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 24, 16, 10, 1, 1, 1, 1] [2025-01-10 02:31:16,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:16,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:16,328 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:16,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1889793935, now seen corresponding path program 9 times [2025-01-10 02:31:16,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:16,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064309653] [2025-01-10 02:31:16,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 02:31:16,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:16,338 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 496 statements into 35 equivalence classes. [2025-01-10 02:31:16,378 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 371 of 496 statements. [2025-01-10 02:31:16,378 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-01-10 02:31:16,379 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8820 backedges. 1737 proven. 1024 refuted. 0 times theorem prover too weak. 6059 trivial. 0 not checked. [2025-01-10 02:31:16,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:16,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064309653] [2025-01-10 02:31:16,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064309653] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:16,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995350307] [2025-01-10 02:31:16,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 02:31:16,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:16,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:16,663 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:16,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-01-10 02:31:16,743 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 496 statements into 35 equivalence classes. [2025-01-10 02:31:16,823 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) and asserted 371 of 496 statements. [2025-01-10 02:31:16,824 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2025-01-10 02:31:16,824 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:16,827 INFO L256 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-01-10 02:31:16,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8820 backedges. 1737 proven. 1024 refuted. 0 times theorem prover too weak. 6059 trivial. 0 not checked. [2025-01-10 02:31:16,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8820 backedges. 1745 proven. 1063 refuted. 0 times theorem prover too weak. 6012 trivial. 0 not checked. [2025-01-10 02:31:17,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995350307] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:17,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:17,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 19] total 21 [2025-01-10 02:31:17,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120787487] [2025-01-10 02:31:17,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:17,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-01-10 02:31:17,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:17,963 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-01-10 02:31:17,963 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2025-01-10 02:31:17,963 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 12 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (24), 15 states have call predecessors, (24), 12 states have call successors, (24) [2025-01-10 02:31:18,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:18,274 INFO L93 Difference]: Finished difference Result 297 states and 378 transitions. [2025-01-10 02:31:18,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-01-10 02:31:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 12 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (24), 15 states have call predecessors, (24), 12 states have call successors, (24) Word has length 496 [2025-01-10 02:31:18,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:18,276 INFO L225 Difference]: With dead ends: 297 [2025-01-10 02:31:18,276 INFO L226 Difference]: Without dead ends: 170 [2025-01-10 02:31:18,277 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1038 GetRequests, 984 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=587, Invalid=1575, Unknown=0, NotChecked=0, Total=2162 [2025-01-10 02:31:18,277 INFO L435 NwaCegarLoop]: 29 mSDtfsCounter, 191 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:18,278 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 121 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 02:31:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2025-01-10 02:31:18,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2025-01-10 02:31:18,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 110 states have (on average 1.0454545454545454) internal successors, (115), 107 states have internal predecessors, (115), 17 states have call successors, (17), 14 states have call predecessors, (17), 8 states have return successors, (38), 14 states have call predecessors, (38), 16 states have call successors, (38) [2025-01-10 02:31:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 170 transitions. [2025-01-10 02:31:18,285 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 170 transitions. Word has length 496 [2025-01-10 02:31:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:18,285 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 170 transitions. [2025-01-10 02:31:18,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 12 states have call successors, (20), 1 states have call predecessors, (20), 9 states have return successors, (24), 15 states have call predecessors, (24), 12 states have call successors, (24) [2025-01-10 02:31:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 170 transitions. [2025-01-10 02:31:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2025-01-10 02:31:18,288 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:18,288 INFO L218 NwaCegarLoop]: trace histogram [35, 34, 28, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 11, 7, 1, 1, 1, 1] [2025-01-10 02:31:18,294 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:18,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:18,488 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:18,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:18,489 INFO L85 PathProgramCache]: Analyzing trace with hash 817405855, now seen corresponding path program 10 times [2025-01-10 02:31:18,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:18,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007865676] [2025-01-10 02:31:18,489 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 02:31:18,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:18,505 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 339 statements into 2 equivalence classes. [2025-01-10 02:31:18,512 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 201 of 339 statements. [2025-01-10 02:31:18,513 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 02:31:18,513 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 743 proven. 1095 refuted. 0 times theorem prover too weak. 2212 trivial. 0 not checked. [2025-01-10 02:31:18,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007865676] [2025-01-10 02:31:18,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007865676] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:18,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132732856] [2025-01-10 02:31:18,684 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-01-10 02:31:18,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:18,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:18,687 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:18,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-01-10 02:31:18,758 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 339 statements into 2 equivalence classes. [2025-01-10 02:31:18,788 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 201 of 339 statements. [2025-01-10 02:31:18,788 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-01-10 02:31:18,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:18,789 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-01-10 02:31:18,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 856 proven. 1214 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2025-01-10 02:31:18,895 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4050 backedges. 856 proven. 1290 refuted. 0 times theorem prover too weak. 1904 trivial. 0 not checked. [2025-01-10 02:31:20,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132732856] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:20,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:20,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 23] total 28 [2025-01-10 02:31:20,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992155133] [2025-01-10 02:31:20,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:20,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-01-10 02:31:20,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:20,043 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-01-10 02:31:20,043 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2025-01-10 02:31:20,043 INFO L87 Difference]: Start difference. First operand 136 states and 170 transitions. Second operand has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 28 states have internal predecessors, (149), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-01-10 02:31:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:20,358 INFO L93 Difference]: Finished difference Result 285 states and 373 transitions. [2025-01-10 02:31:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-01-10 02:31:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 28 states have internal predecessors, (149), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) Word has length 339 [2025-01-10 02:31:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:20,360 INFO L225 Difference]: With dead ends: 285 [2025-01-10 02:31:20,360 INFO L226 Difference]: Without dead ends: 154 [2025-01-10 02:31:20,361 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 713 GetRequests, 661 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2025-01-10 02:31:20,361 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 82 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:20,361 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 238 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 02:31:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2025-01-10 02:31:20,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2025-01-10 02:31:20,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 115 states have internal predecessors, (121), 19 states have call successors, (19), 16 states have call predecessors, (19), 8 states have return successors, (38), 13 states have call predecessors, (38), 18 states have call successors, (38) [2025-01-10 02:31:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 178 transitions. [2025-01-10 02:31:20,369 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 178 transitions. Word has length 339 [2025-01-10 02:31:20,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:20,369 INFO L471 AbstractCegarLoop]: Abstraction has 145 states and 178 transitions. [2025-01-10 02:31:20,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.321428571428571) internal successors, (149), 28 states have internal predecessors, (149), 21 states have call successors, (25), 1 states have call predecessors, (25), 11 states have return successors, (32), 13 states have call predecessors, (32), 21 states have call successors, (32) [2025-01-10 02:31:20,369 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 178 transitions. [2025-01-10 02:31:20,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2025-01-10 02:31:20,371 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:20,371 INFO L218 NwaCegarLoop]: trace histogram [41, 40, 33, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 13, 8, 1, 1, 1, 1] [2025-01-10 02:31:20,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-01-10 02:31:20,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-01-10 02:31:20,571 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:20,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:20,572 INFO L85 PathProgramCache]: Analyzing trace with hash -247046770, now seen corresponding path program 11 times [2025-01-10 02:31:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:20,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199379602] [2025-01-10 02:31:20,572 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 02:31:20,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:20,579 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 398 statements into 29 equivalence classes. [2025-01-10 02:31:20,607 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) and asserted 398 of 398 statements. [2025-01-10 02:31:20,607 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2025-01-10 02:31:20,607 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:22,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 936 proven. 1467 refuted. 0 times theorem prover too weak. 3225 trivial. 0 not checked. [2025-01-10 02:31:22,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:22,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199379602] [2025-01-10 02:31:22,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199379602] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:22,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768905972] [2025-01-10 02:31:22,715 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-01-10 02:31:22,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:22,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:22,717 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:22,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-01-10 02:31:22,799 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 398 statements into 29 equivalence classes. [2025-01-10 02:31:22,883 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) and asserted 398 of 398 statements. [2025-01-10 02:31:22,883 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2025-01-10 02:31:22,883 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:22,885 INFO L256 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 81 conjuncts are in the unsatisfiable core [2025-01-10 02:31:22,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:23,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 820 proven. 1112 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2025-01-10 02:31:23,175 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5628 backedges. 1149 proven. 1015 refuted. 0 times theorem prover too weak. 3464 trivial. 0 not checked. [2025-01-10 02:31:27,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768905972] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:27,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:27,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 29] total 47 [2025-01-10 02:31:27,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073718964] [2025-01-10 02:31:27,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:28,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2025-01-10 02:31:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:28,000 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2025-01-10 02:31:28,001 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1730, Unknown=0, NotChecked=0, Total=2256 [2025-01-10 02:31:28,001 INFO L87 Difference]: Start difference. First operand 145 states and 178 transitions. Second operand has 48 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 48 states have internal predecessors, (124), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) [2025-01-10 02:31:28,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:28,128 INFO L93 Difference]: Finished difference Result 176 states and 232 transitions. [2025-01-10 02:31:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-01-10 02:31:28,128 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 48 states have internal predecessors, (124), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) Word has length 398 [2025-01-10 02:31:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:28,130 INFO L225 Difference]: With dead ends: 176 [2025-01-10 02:31:28,130 INFO L226 Difference]: Without dead ends: 175 [2025-01-10 02:31:28,131 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 879 GetRequests, 774 SyntacticMatches, 55 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2632 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=613, Invalid=2039, Unknown=0, NotChecked=0, Total=2652 [2025-01-10 02:31:28,131 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:28,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 125 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2025-01-10 02:31:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2025-01-10 02:31:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2025-01-10 02:31:28,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 131 states have internal predecessors, (138), 21 states have call successors, (21), 16 states have call predecessors, (21), 10 states have return successors, (58), 18 states have call predecessors, (58), 20 states have call successors, (58) [2025-01-10 02:31:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 217 transitions. [2025-01-10 02:31:28,142 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 217 transitions. Word has length 398 [2025-01-10 02:31:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:28,143 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 217 transitions. [2025-01-10 02:31:28,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.6382978723404253) internal successors, (124), 48 states have internal predecessors, (124), 12 states have call successors, (13), 1 states have call predecessors, (13), 13 states have return successors, (34), 33 states have call predecessors, (34), 12 states have call successors, (34) [2025-01-10 02:31:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 217 transitions. [2025-01-10 02:31:28,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1230 [2025-01-10 02:31:28,149 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:28,150 INFO L218 NwaCegarLoop]: trace histogram [127, 123, 103, 64, 64, 64, 64, 62, 62, 62, 62, 62, 61, 61, 61, 60, 39, 24, 1, 1, 1, 1] [2025-01-10 02:31:28,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:28,350 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-01-10 02:31:28,350 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:28,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:28,351 INFO L85 PathProgramCache]: Analyzing trace with hash 693139185, now seen corresponding path program 12 times [2025-01-10 02:31:28,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:28,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671448195] [2025-01-10 02:31:28,351 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 02:31:28,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:28,370 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1229 statements into 91 equivalence classes. [2025-01-10 02:31:28,466 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) and asserted 820 of 1229 statements. [2025-01-10 02:31:28,466 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2025-01-10 02:31:28,466 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:29,781 INFO L134 CoverageAnalysis]: Checked inductivity of 55363 backedges. 3989 proven. 8470 refuted. 0 times theorem prover too weak. 42904 trivial. 0 not checked. [2025-01-10 02:31:29,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:29,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671448195] [2025-01-10 02:31:29,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671448195] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:29,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145104908] [2025-01-10 02:31:29,782 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-01-10 02:31:29,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:29,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:29,784 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:29,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-01-10 02:31:29,974 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 1229 statements into 91 equivalence classes. [2025-01-10 02:31:30,187 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) and asserted 820 of 1229 statements. [2025-01-10 02:31:30,188 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 62 check-sat command(s) [2025-01-10 02:31:30,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:30,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 1531 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-10 02:31:30,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 55363 backedges. 28460 proven. 4291 refuted. 0 times theorem prover too weak. 22612 trivial. 0 not checked. [2025-01-10 02:31:30,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 55363 backedges. 4130 proven. 8972 refuted. 0 times theorem prover too weak. 42261 trivial. 0 not checked. [2025-01-10 02:31:32,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145104908] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:32,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:32,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 31] total 39 [2025-01-10 02:31:32,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462914837] [2025-01-10 02:31:32,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:32,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2025-01-10 02:31:32,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:32,895 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2025-01-10 02:31:32,895 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2025-01-10 02:31:32,895 INFO L87 Difference]: Start difference. First operand 166 states and 217 transitions. Second operand has 39 states, 39 states have (on average 5.666666666666667) internal successors, (221), 38 states have internal predecessors, (221), 32 states have call successors, (40), 5 states have call predecessors, (40), 15 states have return successors, (45), 18 states have call predecessors, (45), 29 states have call successors, (45) [2025-01-10 02:31:33,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:33,574 INFO L93 Difference]: Finished difference Result 416 states and 616 transitions. [2025-01-10 02:31:33,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2025-01-10 02:31:33,575 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.666666666666667) internal successors, (221), 38 states have internal predecessors, (221), 32 states have call successors, (40), 5 states have call predecessors, (40), 15 states have return successors, (45), 18 states have call predecessors, (45), 29 states have call successors, (45) Word has length 1229 [2025-01-10 02:31:33,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:33,577 INFO L225 Difference]: With dead ends: 416 [2025-01-10 02:31:33,577 INFO L226 Difference]: Without dead ends: 255 [2025-01-10 02:31:33,580 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2536 GetRequests, 2442 SyntacticMatches, 14 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1836 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1544, Invalid=5098, Unknown=0, NotChecked=0, Total=6642 [2025-01-10 02:31:33,580 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 654 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:33,581 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 260 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-10 02:31:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2025-01-10 02:31:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 220. [2025-01-10 02:31:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 179 states have (on average 1.0391061452513966) internal successors, (186), 174 states have internal predecessors, (186), 28 states have call successors, (28), 22 states have call predecessors, (28), 12 states have return successors, (84), 23 states have call predecessors, (84), 27 states have call successors, (84) [2025-01-10 02:31:33,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2025-01-10 02:31:33,596 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 1229 [2025-01-10 02:31:33,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:33,597 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2025-01-10 02:31:33,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.666666666666667) internal successors, (221), 38 states have internal predecessors, (221), 32 states have call successors, (40), 5 states have call predecessors, (40), 15 states have return successors, (45), 18 states have call predecessors, (45), 29 states have call successors, (45) [2025-01-10 02:31:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2025-01-10 02:31:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2025-01-10 02:31:33,601 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:33,601 INFO L218 NwaCegarLoop]: trace histogram [83, 82, 67, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 41, 40, 26, 16, 1, 1, 1, 1] [2025-01-10 02:31:33,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-01-10 02:31:33,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:33,805 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:33,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:33,805 INFO L85 PathProgramCache]: Analyzing trace with hash -975339641, now seen corresponding path program 13 times [2025-01-10 02:31:33,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:33,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970898724] [2025-01-10 02:31:33,805 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 02:31:33,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:33,818 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 810 statements into 1 equivalence classes. [2025-01-10 02:31:33,858 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 810 of 810 statements. [2025-01-10 02:31:33,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:33,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:34,698 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2257 proven. 4945 refuted. 0 times theorem prover too weak. 16657 trivial. 0 not checked. [2025-01-10 02:31:34,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:34,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970898724] [2025-01-10 02:31:34,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970898724] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:34,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662681154] [2025-01-10 02:31:34,699 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-01-10 02:31:34,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:34,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:34,702 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:34,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-01-10 02:31:34,857 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 810 statements into 1 equivalence classes. [2025-01-10 02:31:34,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 810 of 810 statements. [2025-01-10 02:31:34,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-01-10 02:31:34,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:34,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 26 conjuncts are in the unsatisfiable core [2025-01-10 02:31:34,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 12210 proven. 2667 refuted. 0 times theorem prover too weak. 8982 trivial. 0 not checked. [2025-01-10 02:31:35,085 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:37,595 INFO L134 CoverageAnalysis]: Checked inductivity of 23859 backedges. 2246 proven. 5308 refuted. 0 times theorem prover too weak. 16305 trivial. 0 not checked. [2025-01-10 02:31:37,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662681154] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:37,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:37,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 27] total 32 [2025-01-10 02:31:37,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306949166] [2025-01-10 02:31:37,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:37,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-01-10 02:31:37,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:37,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-01-10 02:31:37,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2025-01-10 02:31:37,597 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 32 states, 32 states have (on average 5.6875) internal successors, (182), 32 states have internal predecessors, (182), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-01-10 02:31:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:37,948 INFO L93 Difference]: Finished difference Result 441 states and 622 transitions. [2025-01-10 02:31:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-01-10 02:31:37,948 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.6875) internal successors, (182), 32 states have internal predecessors, (182), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) Word has length 810 [2025-01-10 02:31:37,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:37,951 INFO L225 Difference]: With dead ends: 441 [2025-01-10 02:31:37,951 INFO L226 Difference]: Without dead ends: 226 [2025-01-10 02:31:37,952 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1664 GetRequests, 1603 SyntacticMatches, 13 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2025-01-10 02:31:37,953 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 146 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:37,953 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 251 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2025-01-10 02:31:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2025-01-10 02:31:37,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 190. [2025-01-10 02:31:37,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 154 states have (on average 1.0324675324675325) internal successors, (159), 151 states have internal predecessors, (159), 25 states have call successors, (25), 20 states have call predecessors, (25), 10 states have return successors, (63), 18 states have call predecessors, (63), 24 states have call successors, (63) [2025-01-10 02:31:37,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 247 transitions. [2025-01-10 02:31:37,963 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 247 transitions. Word has length 810 [2025-01-10 02:31:37,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:37,963 INFO L471 AbstractCegarLoop]: Abstraction has 190 states and 247 transitions. [2025-01-10 02:31:37,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.6875) internal successors, (182), 32 states have internal predecessors, (182), 26 states have call successors, (31), 2 states have call predecessors, (31), 14 states have return successors, (40), 14 states have call predecessors, (40), 26 states have call successors, (40) [2025-01-10 02:31:37,964 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 247 transitions. [2025-01-10 02:31:37,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 915 [2025-01-10 02:31:37,969 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:37,969 INFO L218 NwaCegarLoop]: trace histogram [94, 92, 76, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 46, 45, 29, 18, 1, 1, 1, 1] [2025-01-10 02:31:37,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-01-10 02:31:38,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:38,170 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:38,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash -501661377, now seen corresponding path program 14 times [2025-01-10 02:31:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:38,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496248003] [2025-01-10 02:31:38,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 02:31:38,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:38,187 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 914 statements into 2 equivalence classes. [2025-01-10 02:31:38,233 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 914 of 914 statements. [2025-01-10 02:31:38,233 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 02:31:38,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:39,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30452 backedges. 3406 proven. 5088 refuted. 0 times theorem prover too weak. 21958 trivial. 0 not checked. [2025-01-10 02:31:39,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:39,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496248003] [2025-01-10 02:31:39,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496248003] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:39,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482471791] [2025-01-10 02:31:39,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-01-10 02:31:39,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:39,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:39,247 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:39,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-01-10 02:31:39,424 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 914 statements into 2 equivalence classes. [2025-01-10 02:31:39,533 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 914 of 914 statements. [2025-01-10 02:31:39,533 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-01-10 02:31:39,533 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:39,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 1708 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-01-10 02:31:39,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:31:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30452 backedges. 3844 proven. 5527 refuted. 0 times theorem prover too weak. 21081 trivial. 0 not checked. [2025-01-10 02:31:39,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-01-10 02:31:42,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30452 backedges. 3844 proven. 5699 refuted. 0 times theorem prover too weak. 20909 trivial. 0 not checked. [2025-01-10 02:31:42,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482471791] provided 0 perfect and 2 imperfect interpolant sequences [2025-01-10 02:31:42,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-01-10 02:31:42,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 31] total 36 [2025-01-10 02:31:42,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299435300] [2025-01-10 02:31:42,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-01-10 02:31:42,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2025-01-10 02:31:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-01-10 02:31:42,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2025-01-10 02:31:42,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2025-01-10 02:31:42,585 INFO L87 Difference]: Start difference. First operand 190 states and 247 transitions. Second operand has 36 states, 36 states have (on average 5.472222222222222) internal successors, (197), 36 states have internal predecessors, (197), 29 states have call successors, (33), 1 states have call predecessors, (33), 15 states have return successors, (44), 17 states have call predecessors, (44), 29 states have call successors, (44) [2025-01-10 02:31:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2025-01-10 02:31:43,022 INFO L93 Difference]: Finished difference Result 399 states and 538 transitions. [2025-01-10 02:31:43,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-01-10 02:31:43,023 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.472222222222222) internal successors, (197), 36 states have internal predecessors, (197), 29 states have call successors, (33), 1 states have call predecessors, (33), 15 states have return successors, (44), 17 states have call predecessors, (44), 29 states have call successors, (44) Word has length 914 [2025-01-10 02:31:43,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2025-01-10 02:31:43,025 INFO L225 Difference]: With dead ends: 399 [2025-01-10 02:31:43,025 INFO L226 Difference]: Without dead ends: 214 [2025-01-10 02:31:43,027 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1877 GetRequests, 1807 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=805, Invalid=2387, Unknown=0, NotChecked=0, Total=3192 [2025-01-10 02:31:43,027 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 216 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2025-01-10 02:31:43,027 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 305 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2025-01-10 02:31:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2025-01-10 02:31:43,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 166. [2025-01-10 02:31:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 132 states have internal predecessors, (136), 22 states have call successors, (22), 16 states have call predecessors, (22), 10 states have return successors, (56), 17 states have call predecessors, (56), 21 states have call successors, (56) [2025-01-10 02:31:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 214 transitions. [2025-01-10 02:31:43,037 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 214 transitions. Word has length 914 [2025-01-10 02:31:43,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2025-01-10 02:31:43,038 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 214 transitions. [2025-01-10 02:31:43,038 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.472222222222222) internal successors, (197), 36 states have internal predecessors, (197), 29 states have call successors, (33), 1 states have call predecessors, (33), 15 states have return successors, (44), 17 states have call predecessors, (44), 29 states have call successors, (44) [2025-01-10 02:31:43,038 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 214 transitions. [2025-01-10 02:31:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1072 [2025-01-10 02:31:43,043 INFO L210 NwaCegarLoop]: Found error trace [2025-01-10 02:31:43,044 INFO L218 NwaCegarLoop]: trace histogram [110, 108, 89, 55, 55, 55, 55, 54, 54, 54, 54, 54, 54, 54, 54, 53, 34, 21, 1, 1, 1, 1] [2025-01-10 02:31:43,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-01-10 02:31:43,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:43,244 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting fibonacciErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [fibonacciErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fibonacciErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2025-01-10 02:31:43,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-01-10 02:31:43,245 INFO L85 PathProgramCache]: Analyzing trace with hash 219479183, now seen corresponding path program 15 times [2025-01-10 02:31:43,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-01-10 02:31:43,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449210242] [2025-01-10 02:31:43,245 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 02:31:43,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-01-10 02:31:43,262 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1071 statements into 76 equivalence classes. [2025-01-10 02:31:43,359 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) and asserted 1071 of 1071 statements. [2025-01-10 02:31:43,359 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2025-01-10 02:31:43,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41934 backedges. 7255 proven. 10190 refuted. 0 times theorem prover too weak. 24489 trivial. 0 not checked. [2025-01-10 02:31:59,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-01-10 02:31:59,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449210242] [2025-01-10 02:31:59,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449210242] provided 0 perfect and 1 imperfect interpolant sequences [2025-01-10 02:31:59,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420880502] [2025-01-10 02:31:59,351 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-01-10 02:31:59,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-01-10 02:31:59,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-01-10 02:31:59,353 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-01-10 02:31:59,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-01-10 02:31:59,571 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 1071 statements into 76 equivalence classes. [2025-01-10 02:31:59,821 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) and asserted 1071 of 1071 statements. [2025-01-10 02:31:59,821 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2025-01-10 02:31:59,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-01-10 02:31:59,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 1998 conjuncts, 217 conjuncts are in the unsatisfiable core [2025-01-10 02:31:59,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-01-10 02:32:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 41934 backedges. 6686 proven. 7855 refuted. 0 times theorem prover too weak. 27393 trivial. 0 not checked. [2025-01-10 02:32:00,515 INFO L312 TraceCheckSpWp]: Computing backward predicates...