This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 06:26:09,228 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 06:26:09,307 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 06:26:09,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 06:26:09,313 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 06:26:09,356 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 06:26:09,356 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 06:26:09,357 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 06:26:09,357 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 06:26:09,357 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 06:26:09,358 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 06:26:09,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 06:26:09,360 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 06:26:09,364 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 06:26:09,364 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 06:26:09,365 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 06:26:09,365 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 06:26:09,365 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 06:26:09,365 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 06:26:09,365 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 06:26:09,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 06:26:09,366 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 06:26:09,367 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 06:26:09,367 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 06:26:09,367 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 06:26:09,368 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 06:26:09,368 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 06:26:09,368 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 06:26:09,368 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 06:26:09,369 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 06:26:09,369 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 06:26:09,369 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 06:26:09,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:26:09,370 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 06:26:09,370 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 06:26:09,370 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 06:26:09,371 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 06:26:09,371 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 06:26:09,371 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 06:26:09,372 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 06:26:09,372 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 06:26:09,373 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 06:26:09,373 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 06:26:09,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 06:26:09,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 06:26:09,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 06:26:09,676 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 06:26:09,676 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 06:26:09,678 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_5-1.yml/witness-2.1.yml [2024-09-13 06:26:09,753 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 06:26:09,754 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 06:26:09,754 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2024-09-13 06:26:11,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 06:26:11,440 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 06:26:11,440 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c [2024-09-13 06:26:11,448 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/391cfed79/0048d949f64f487c8bc826c671dddf4a/FLAG8f4a45a87 [2024-09-13 06:26:11,829 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/391cfed79/0048d949f64f487c8bc826c671dddf4a [2024-09-13 06:26:11,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 06:26:11,831 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 06:26:11,834 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 06:26:11,834 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 06:26:11,840 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 06:26:11,840 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:26:09" (1/2) ... [2024-09-13 06:26:11,843 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@745756b4 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:11, skipping insertion in model container [2024-09-13 06:26:11,843 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:26:09" (1/2) ... [2024-09-13 06:26:11,845 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@341bbc8a and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:26:11, skipping insertion in model container [2024-09-13 06:26:11,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:26:11" (2/2) ... [2024-09-13 06:26:11,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@745756b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:11, skipping insertion in model container [2024-09-13 06:26:11,846 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:26:11" (2/2) ... [2024-09-13 06:26:11,853 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 06:26:11,854 INFO L1541 ArrayList]: Function contract at [L9]: requires null, ensures ((((\result == 0) || (1 < \old(n))) || (\old(n) == 1)) && ((\old(n) != 1) || (\result == 1))) [2024-09-13 06:26:11,854 INFO L1541 ArrayList]: Function contract at [L19]: requires null, ensures (((((\result == 1) && (\old(n) == 1)) || (\result == 0)) || (2 < \old(n))) && ((((((2 == \result) && (3 == \old(n))) || ((\result == 1) && (\old(n) == 1))) || ((3 == \result) && (\old(n) == 4))) || (4 < \old(n))) || (\old(n) < 1))) [2024-09-13 06:26:11,874 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 06:26:12,043 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2024-09-13 06:26:12,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:26:12,060 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global [2024-09-13 06:26:12,113 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_5-1.c[946,959] [2024-09-13 06:26:12,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:26:12,139 INFO L204 MainTranslator]: Completed translation [2024-09-13 06:26:12,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12 WrapperNode [2024-09-13 06:26:12,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 06:26:12,142 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 06:26:12,142 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 06:26:12,142 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 06:26:12,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,158 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,173 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-13 06:26:12,174 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 06:26:12,176 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 06:26:12,176 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 06:26:12,176 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 06:26:12,186 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,188 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,201 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure fibo2 is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-13 06:26:12,201 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,205 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,208 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,210 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,211 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,212 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,214 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 06:26:12,215 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 06:26:12,215 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 06:26:12,215 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 06:26:12,216 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (1/1) ... [2024-09-13 06:26:12,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:26:12,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:12,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 06:26:12,247 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 06:26:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 06:26:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 06:26:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-09-13 06:26:12,287 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-09-13 06:26:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-09-13 06:26:12,288 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-09-13 06:26:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 06:26:12,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 06:26:12,345 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 06:26:12,346 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 06:26:12,514 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-09-13 06:26:12,515 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 06:26:12,543 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 06:26:12,543 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 06:26:12,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:26:12 BoogieIcfgContainer [2024-09-13 06:26:12,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 06:26:12,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 06:26:12,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 06:26:12,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 06:26:12,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:26:09" (1/4) ... [2024-09-13 06:26:12,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e561c2 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:26:12, skipping insertion in model container [2024-09-13 06:26:12,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 06:26:11" (2/4) ... [2024-09-13 06:26:12,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e561c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 06:26:12, skipping insertion in model container [2024-09-13 06:26:12,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:26:12" (3/4) ... [2024-09-13 06:26:12,554 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e561c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 06:26:12, skipping insertion in model container [2024-09-13 06:26:12,554 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:26:12" (4/4) ... [2024-09-13 06:26:12,556 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2024-09-13 06:26:12,573 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 06:26:12,574 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-09-13 06:26:12,638 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 06:26:12,647 INFO L336 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=None, 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;@5f9894dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 06:26:12,648 INFO L337 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-09-13 06:26:12,653 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 06:26:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 06:26:12,661 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:12,661 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 06:26:12,662 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:12,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 83656213, now seen corresponding path program 1 times [2024-09-13 06:26:12,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:12,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023550031] [2024-09-13 06:26:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:12,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:12,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:12,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023550031] [2024-09-13 06:26:12,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023550031] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:12,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:12,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 06:26:12,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289336302] [2024-09-13 06:26:12,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:12,935 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:26:12,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:26:12,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:26:12,989 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2024-09-13 06:26:13,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:13,088 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2024-09-13 06:26:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:26:13,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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 5 [2024-09-13 06:26:13,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:13,096 INFO L225 Difference]: With dead ends: 39 [2024-09-13 06:26:13,096 INFO L226 Difference]: Without dead ends: 37 [2024-09-13 06:26:13,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:26:13,101 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:13,102 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 82 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-13 06:26:13,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-09-13 06:26:13,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 24 states have internal predecessors, (30), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 06:26:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-09-13 06:26:13,141 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 5 [2024-09-13 06:26:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:13,143 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-09-13 06:26:13,144 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 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) [2024-09-13 06:26:13,145 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-09-13 06:26:13,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-13 06:26:13,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:13,147 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:13,148 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 06:26:13,148 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:13,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:13,149 INFO L85 PathProgramCache]: Analyzing trace with hash 422480245, now seen corresponding path program 1 times [2024-09-13 06:26:13,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:13,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147348252] [2024-09-13 06:26:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:13,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:13,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147348252] [2024-09-13 06:26:13,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147348252] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:13,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:13,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 06:26:13,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443397655] [2024-09-13 06:26:13,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:13,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 06:26:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:13,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 06:26:13,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 06:26:13,318 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:13,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:13,396 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-09-13 06:26:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 06:26:13,397 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-09-13 06:26:13,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:13,399 INFO L225 Difference]: With dead ends: 40 [2024-09-13 06:26:13,399 INFO L226 Difference]: Without dead ends: 40 [2024-09-13 06:26:13,399 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 06:26:13,400 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:13,401 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:13,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-13 06:26:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2024-09-13 06:26:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 06:26:13,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-13 06:26:13,418 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 9 [2024-09-13 06:26:13,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:13,419 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-13 06:26:13,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:13,420 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-13 06:26:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-13 06:26:13,422 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:13,422 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:13,422 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 06:26:13,422 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:13,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:13,423 INFO L85 PathProgramCache]: Analyzing trace with hash 398305833, now seen corresponding path program 1 times [2024-09-13 06:26:13,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:13,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234959775] [2024-09-13 06:26:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:13,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:13,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 06:26:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:13,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:13,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:13,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234959775] [2024-09-13 06:26:13,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234959775] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:13,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:13,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 06:26:13,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430112976] [2024-09-13 06:26:13,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:13,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:26:13,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:13,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:26:13,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:26:13,564 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 06:26:13,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:13,651 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2024-09-13 06:26:13,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:26:13,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-09-13 06:26:13,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:13,654 INFO L225 Difference]: With dead ends: 46 [2024-09-13 06:26:13,655 INFO L226 Difference]: Without dead ends: 44 [2024-09-13 06:26:13,655 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:26:13,656 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:13,659 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 74 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:13,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-13 06:26:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2024-09-13 06:26:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-13 06:26:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2024-09-13 06:26:13,670 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 9 [2024-09-13 06:26:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:13,670 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2024-09-13 06:26:13,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 06:26:13,671 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2024-09-13 06:26:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-13 06:26:13,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:13,673 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:13,673 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 06:26:13,673 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:13,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash 211986483, now seen corresponding path program 1 times [2024-09-13 06:26:13,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:13,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395977779] [2024-09-13 06:26:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:13,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:13,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:13,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395977779] [2024-09-13 06:26:13,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395977779] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:13,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:13,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 06:26:13,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108445879] [2024-09-13 06:26:13,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:13,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 06:26:13,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 06:26:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-13 06:26:13,796 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:13,930 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2024-09-13 06:26:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 06:26:13,931 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-13 06:26:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:13,932 INFO L225 Difference]: With dead ends: 46 [2024-09-13 06:26:13,932 INFO L226 Difference]: Without dead ends: 46 [2024-09-13 06:26:13,933 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-13 06:26:13,934 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:13,934 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 149 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-13 06:26:13,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2024-09-13 06:26:13,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 31 states have internal predecessors, (36), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 06:26:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-09-13 06:26:13,945 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 10 [2024-09-13 06:26:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:13,946 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-09-13 06:26:13,946 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:13,947 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-09-13 06:26:13,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-13 06:26:13,947 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:13,947 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:13,947 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 06:26:13,948 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:13,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1688882568, now seen corresponding path program 1 times [2024-09-13 06:26:13,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:13,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434770282] [2024-09-13 06:26:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:13,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:26:14,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:14,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434770282] [2024-09-13 06:26:14,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434770282] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:14,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:14,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 06:26:14,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586960807] [2024-09-13 06:26:14,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:14,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 06:26:14,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 06:26:14,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 06:26:14,021 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:14,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:14,074 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2024-09-13 06:26:14,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 06:26:14,075 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-09-13 06:26:14,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:14,076 INFO L225 Difference]: With dead ends: 50 [2024-09-13 06:26:14,076 INFO L226 Difference]: Without dead ends: 50 [2024-09-13 06:26:14,077 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 06:26:14,077 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:14,078 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 52 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 06:26:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-13 06:26:14,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2024-09-13 06:26:14,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-13 06:26:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-09-13 06:26:14,091 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 13 [2024-09-13 06:26:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:14,092 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-09-13 06:26:14,092 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:14,092 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-09-13 06:26:14,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-13 06:26:14,093 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:14,093 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:14,093 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-13 06:26:14,093 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:14,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:14,094 INFO L85 PathProgramCache]: Analyzing trace with hash 815752847, now seen corresponding path program 1 times [2024-09-13 06:26:14,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:14,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146080913] [2024-09-13 06:26:14,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:14,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:14,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:14,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146080913] [2024-09-13 06:26:14,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146080913] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:14,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:14,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 06:26:14,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253481735] [2024-09-13 06:26:14,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:14,200 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 06:26:14,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:14,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 06:26:14,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 06:26:14,201 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:14,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:14,275 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2024-09-13 06:26:14,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 06:26:14,276 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-09-13 06:26:14,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:14,277 INFO L225 Difference]: With dead ends: 62 [2024-09-13 06:26:14,277 INFO L226 Difference]: Without dead ends: 62 [2024-09-13 06:26:14,277 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 06:26:14,278 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 11 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:14,278 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 149 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-13 06:26:14,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2024-09-13 06:26:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 39 states have internal predecessors, (47), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 06:26:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2024-09-13 06:26:14,290 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 14 [2024-09-13 06:26:14,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:14,291 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2024-09-13 06:26:14,291 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 6 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:14,291 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2024-09-13 06:26:14,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 06:26:14,292 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:14,292 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:14,293 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-13 06:26:14,293 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:14,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1887144096, now seen corresponding path program 1 times [2024-09-13 06:26:14,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539426057] [2024-09-13 06:26:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:14,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:14,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:14,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:14,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539426057] [2024-09-13 06:26:14,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539426057] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:14,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978679123] [2024-09-13 06:26:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:14,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:14,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:14,457 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:14,459 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 06:26:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:14,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 06:26:14,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:14,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:26:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:14,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978679123] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:26:14,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:26:14,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2024-09-13 06:26:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354947509] [2024-09-13 06:26:14,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:26:14,729 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 06:26:14,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 06:26:14,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-13 06:26:14,732 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:14,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:14,906 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2024-09-13 06:26:14,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 06:26:14,906 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-09-13 06:26:14,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:14,907 INFO L225 Difference]: With dead ends: 76 [2024-09-13 06:26:14,907 INFO L226 Difference]: Without dead ends: 76 [2024-09-13 06:26:14,908 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-13 06:26:14,909 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 47 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:14,909 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 237 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:26:14,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-13 06:26:14,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-13 06:26:14,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 51 states have internal predecessors, (60), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-13 06:26:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2024-09-13 06:26:14,919 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 18 [2024-09-13 06:26:14,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:14,920 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2024-09-13 06:26:14,920 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:14,920 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2024-09-13 06:26:14,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-13 06:26:14,921 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:14,921 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-13 06:26:14,940 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-13 06:26:15,121 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 06:26:15,122 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:15,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:15,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2123869197, now seen corresponding path program 2 times [2024-09-13 06:26:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:15,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088790633] [2024-09-13 06:26:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:15,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:15,280 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:15,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:15,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088790633] [2024-09-13 06:26:15,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088790633] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:15,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:15,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-13 06:26:15,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447039673] [2024-09-13 06:26:15,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:15,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 06:26:15,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:15,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 06:26:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-09-13 06:26:15,283 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:15,541 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2024-09-13 06:26:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 06:26:15,542 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-09-13 06:26:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:15,543 INFO L225 Difference]: With dead ends: 102 [2024-09-13 06:26:15,544 INFO L226 Difference]: Without dead ends: 102 [2024-09-13 06:26:15,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2024-09-13 06:26:15,545 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:15,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 119 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 06:26:15,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-13 06:26:15,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2024-09-13 06:26:15,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 64 states have (on average 1.234375) internal successors, (79), 66 states have internal predecessors, (79), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-13 06:26:15,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2024-09-13 06:26:15,561 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 26 [2024-09-13 06:26:15,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:15,562 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2024-09-13 06:26:15,562 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:26:15,563 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2024-09-13 06:26:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-13 06:26:15,566 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:15,566 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:15,566 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-13 06:26:15,566 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:15,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:15,567 INFO L85 PathProgramCache]: Analyzing trace with hash 512134780, now seen corresponding path program 1 times [2024-09-13 06:26:15,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:15,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926098001] [2024-09-13 06:26:15,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:15,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:15,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 06:26:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-13 06:26:15,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:15,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926098001] [2024-09-13 06:26:15,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926098001] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:26:15,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:26:15,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 06:26:15,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219567435] [2024-09-13 06:26:15,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:26:15,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:26:15,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:15,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:26:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:26:15,640 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 06:26:15,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:15,678 INFO L93 Difference]: Finished difference Result 103 states and 125 transitions. [2024-09-13 06:26:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:26:15,679 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), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-13 06:26:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:15,681 INFO L225 Difference]: With dead ends: 103 [2024-09-13 06:26:15,681 INFO L226 Difference]: Without dead ends: 103 [2024-09-13 06:26:15,681 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:26:15,682 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:15,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 77 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 06:26:15,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-13 06:26:15,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2024-09-13 06:26:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.2222222222222223) internal successors, (77), 65 states have internal predecessors, (77), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-13 06:26:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-13 06:26:15,691 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 28 [2024-09-13 06:26:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:15,691 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-13 06:26:15,692 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 06:26:15,692 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-13 06:26:15,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 06:26:15,693 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:15,693 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:15,693 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-13 06:26:15,693 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:15,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1760453507, now seen corresponding path program 1 times [2024-09-13 06:26:15,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:15,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388817700] [2024-09-13 06:26:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:15,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:15,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 06:26:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:15,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 06:26:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-13 06:26:15,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:26:15,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388817700] [2024-09-13 06:26:15,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388817700] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:26:15,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626575597] [2024-09-13 06:26:15,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:15,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:26:15,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:26:15,765 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:26:15,767 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 06:26:15,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:26:15,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 06:26:15,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:26:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:26:15,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:26:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:26:16,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626575597] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:26:16,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:26:16,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 16 [2024-09-13 06:26:16,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680999314] [2024-09-13 06:26:16,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:26:16,124 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 06:26:16,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:26:16,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 06:26:16,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-09-13 06:26:16,125 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:26:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:26:16,365 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2024-09-13 06:26:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 06:26:16,366 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2024-09-13 06:26:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:26:16,367 INFO L225 Difference]: With dead ends: 108 [2024-09-13 06:26:16,367 INFO L226 Difference]: Without dead ends: 104 [2024-09-13 06:26:16,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-13 06:26:16,368 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 06:26:16,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 194 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 06:26:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-09-13 06:26:16,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 95. [2024-09-13 06:26:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 17 states have call successors, (17), 10 states have call predecessors, (17), 11 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2024-09-13 06:26:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 111 transitions. [2024-09-13 06:26:16,379 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 111 transitions. Word has length 30 [2024-09-13 06:26:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:26:16,380 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 111 transitions. [2024-09-13 06:26:16,380 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 12 states have internal predecessors, (37), 7 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 06:26:16,380 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 111 transitions. [2024-09-13 06:26:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 06:26:16,380 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:26:16,380 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:16,399 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 06:26:16,581 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 06:26:16,581 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:26:16,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:26:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1938157796, now seen corresponding path program 1 times [2024-09-13 06:26:16,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:26:16,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932594590] [2024-09-13 06:26:16,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:26:16,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:26:16,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-13 06:26:16,594 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-09-13 06:26:16,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-13 06:26:16,619 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-09-13 06:26:16,619 INFO L326 BasicCegarLoop]: Counterexample is feasible [2024-09-13 06:26:16,620 INFO L785 garLoopResultBuilder]: Registering result UNSAFE for location fibo2Err0ENSURES_VIOLATIONPOST_CONDITION (2 of 3 remaining) [2024-09-13 06:26:16,622 INFO L785 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-09-13 06:26:16,623 INFO L785 garLoopResultBuilder]: Registering result UNKNOWN for location fibo1Err0ENSURES_VIOLATIONPOST_CONDITION (0 of 3 remaining) [2024-09-13 06:26:16,623 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-13 06:26:16,626 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:26:16,655 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 06:26:16,658 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 06:26:16 BoogieIcfgContainer [2024-09-13 06:26:16,661 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 06:26:16,661 INFO L158 Benchmark]: Toolchain (without parser) took 4830.64ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 84.2MB in the beginning and 82.2MB in the end (delta: 2.1MB). Peak memory consumption was 35.6MB. Max. memory is 16.1GB. [2024-09-13 06:26:16,662 INFO L158 Benchmark]: Witness Parser took 0.34ms. Allocated memory is still 155.2MB. Free memory is still 119.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 06:26:16,662 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 155.2MB. Free memory is still 128.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 06:26:16,662 INFO L158 Benchmark]: CACSL2BoogieTranslator took 306.53ms. Allocated memory is still 155.2MB. Free memory was 84.0MB in the beginning and 116.4MB in the end (delta: -32.4MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2024-09-13 06:26:16,663 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.59ms. Allocated memory is still 155.2MB. Free memory was 116.4MB in the beginning and 114.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 06:26:16,663 INFO L158 Benchmark]: Boogie Preprocessor took 37.97ms. Allocated memory is still 155.2MB. Free memory was 114.8MB in the beginning and 113.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 06:26:16,664 INFO L158 Benchmark]: RCFGBuilder took 328.82ms. Allocated memory is still 155.2MB. Free memory was 113.2MB in the beginning and 100.1MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-13 06:26:16,664 INFO L158 Benchmark]: TraceAbstraction took 4113.16ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 99.1MB in the beginning and 82.2MB in the end (delta: 16.9MB). Peak memory consumption was 47.8MB. Max. memory is 16.1GB. [2024-09-13 06:26:16,665 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.34ms. Allocated memory is still 155.2MB. Free memory is still 119.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.09ms. Allocated memory is still 155.2MB. Free memory is still 128.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 306.53ms. Allocated memory is still 155.2MB. Free memory was 84.0MB in the beginning and 116.4MB in the end (delta: -32.4MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.59ms. Allocated memory is still 155.2MB. Free memory was 116.4MB in the beginning and 114.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.97ms. Allocated memory is still 155.2MB. Free memory was 114.8MB in the beginning and 113.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 328.82ms. Allocated memory is still 155.2MB. Free memory was 113.2MB in the beginning and 100.1MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 4113.16ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 99.1MB in the beginning and 82.2MB in the end (delta: 16.9MB). Peak memory consumption was 47.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: procedure postcondition can be violated procedure postcondition can be violated We found a FailurePath: [L38] int x = 5; VAL [x=5] [L39] CALL fibo1(x) VAL [\old(n)=5] [L10] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L12] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L15] CALL fibo2(n-1) VAL [\old(n)=4] [L20] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L22] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=3] [L10] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L12] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L15] CALL fibo2(n-1) VAL [\old(n)=2] [L20] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L22] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-1) VAL [\old(n)=1] [L10] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L12] COND TRUE n == 1 [L13] return 1; VAL [\old(n)=1, \result=1] [L25] RET, EXPR fibo1(n-1) VAL [\old(n)=2, n=2] [L25] CALL, EXPR fibo1(n-2) VAL [\old(n)=0] [L10] COND TRUE n < 1 [L11] return 0; VAL [\old(n)=0, \result=0] [L25] RET, EXPR fibo1(n-2) VAL [\old(n)=2, n=2] [L25] return fibo1(n-1) + fibo1(n-2); - UnprovableResult [Line: 41]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 9]: Unable to prove that procedure postcondition always holds Unable to prove that procedure postcondition always holds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 4.0s, OverallIterations: 11, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 296 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 270 mSDsluCounter, 1190 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 927 mSDsCounter, 91 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1050 IncrementalHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 91 mSolverCounterUnsat, 263 mSDtfsCounter, 1050 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 85 SyntacticMatches, 19 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=95occurred in iteration=10, InterpolantAutomatonStates: 77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 54 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 241 NumberOfCodeBlocks, 241 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 244 ConstructedInterpolants, 0 QuantifiedInterpolants, 558 SizeOfPredicates, 8 NumberOfNonLiveVariables, 147 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 74/129 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-09-13 06:26:16,700 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...