This is Ultimate 0.2.4-dev-1d5fa63-m
[2024-09-13 10:27:20,157 INFO L188 SettingsManager]: Resetting all preferences to default values...
[2024-09-13 10:27:20,240 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf
[2024-09-13 10:27:20,244 WARN L101 SettingsManager]: Preference file contains the following unknown settings:
[2024-09-13 10:27:20,244 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class
[2024-09-13 10:27:20,282 INFO L130 SettingsManager]: Preferences different from defaults after loading the file:
[2024-09-13 10:27:20,282 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults:
[2024-09-13 10:27:20,283 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR;
[2024-09-13 10:27:20,283 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults:
[2024-09-13 10:27:20,284 INFO L153 SettingsManager]: * Use memory slicer=true
[2024-09-13 10:27:20,284 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2024-09-13 10:27:20,285 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS
[2024-09-13 10:27:20,285 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2024-09-13 10:27:20,286 INFO L153 SettingsManager]: * Create parallel compositions if possible=false
[2024-09-13 10:27:20,286 INFO L153 SettingsManager]: * Use SBE=true
[2024-09-13 10:27:20,287 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2024-09-13 10:27:20,287 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2024-09-13 10:27:20,287 INFO L153 SettingsManager]: * sizeof long=4
[2024-09-13 10:27:20,288 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true
[2024-09-13 10:27:20,288 INFO L153 SettingsManager]: * sizeof POINTER=4
[2024-09-13 10:27:20,288 INFO L153 SettingsManager]: * Check division by zero=IGNORE
[2024-09-13 10:27:20,289 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2024-09-13 10:27:20,289 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2024-09-13 10:27:20,289 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2024-09-13 10:27:20,290 INFO L153 SettingsManager]: * Allow undefined functions=false
[2024-09-13 10:27:20,290 INFO L153 SettingsManager]: * sizeof long double=12
[2024-09-13 10:27:20,290 INFO L153 SettingsManager]: * Check if freed pointer was valid=false
[2024-09-13 10:27:20,291 INFO L153 SettingsManager]: * Use constant arrays=true
[2024-09-13 10:27:20,291 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2024-09-13 10:27:20,291 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements
[2024-09-13 10:27:20,292 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true
[2024-09-13 10:27:20,292 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode
[2024-09-13 10:27:20,292 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-09-13 10:27:20,293 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2024-09-13 10:27:20,293 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2024-09-13 10:27:20,293 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads
[2024-09-13 10:27:20,294 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL
[2024-09-13 10:27:20,294 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2024-09-13 10:27:20,294 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false
[2024-09-13 10:27:20,295 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET
[2024-09-13 10:27:20,295 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO
[2024-09-13 10:27:20,297 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
[2024-09-13 10:27:20,297 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$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None
[2024-09-13 10:27:20,534 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2024-09-13 10:27:20,558 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2024-09-13 10:27:20,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2024-09-13 10:27:20,561 INFO L270 PluginConnector]: Initializing Witness Parser...
[2024-09-13 10:27:20,562 INFO L274 PluginConnector]: Witness Parser initialized
[2024-09-13 10:27:20,563 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/Fibonacci01-1.yml/witness-2.1.yml
[2024-09-13 10:27:20,607 INFO L270 PluginConnector]: Initializing CDTParser...
[2024-09-13 10:27:20,607 INFO L274 PluginConnector]: CDTParser initialized
[2024-09-13 10:27:20,607 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/Fibonacci01-1.c
[2024-09-13 10:27:22,027 INFO L533 CDTParser]: Created temporary CDT project at NULL
[2024-09-13 10:27:22,200 INFO L384 CDTParser]: Found 1 translation units.
[2024-09-13 10:27:22,200 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Fibonacci01-1.c
[2024-09-13 10:27:22,207 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/042287ba5/9c9e5514eed349f58968f2a192958a8d/FLAGbee224336
[2024-09-13 10:27:22,219 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/042287ba5/9c9e5514eed349f58968f2a192958a8d
[2024-09-13 10:27:22,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2024-09-13 10:27:22,221 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements.
[2024-09-13 10:27:22,222 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2024-09-13 10:27:22,222 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2024-09-13 10:27:22,227 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized
[2024-09-13 10:27:22,228 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 10:27:20" (1/2) ...
[2024-09-13 10:27:22,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b3b537 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:22, skipping insertion in model container
[2024-09-13 10:27:22,229 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 10:27:20" (1/2) ...
[2024-09-13 10:27:22,231 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@fbcca97 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:22, skipping insertion in model container
[2024-09-13 10:27:22,231 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:22" (2/2) ...
[2024-09-13 10:27:22,231 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23b3b537 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22, skipping insertion in model container
[2024-09-13 10:27:22,231 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:22" (2/2) ...
[2024-09-13 10:27:22,238 INFO L93 nessWitnessExtractor]: Found the following entries in the witness:
[2024-09-13 10:27:22,239 INFO L1541 ArrayList]: Function contract at [L16]: requires null, ensures ((((2 <= \old(n)) && (\old(n) <= ((long long) \result + 1))) || ((\old(n) <= 0) && ((\result == 1) || (\result == 0)))) || ((\result == 1) && (1 == \old(n))))
[2024-09-13 10:27:22,255 INFO L175 MainTranslator]: Built tables and reachable declarations
[2024-09-13 10:27:22,400 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/Fibonacci01-1.c[804,817]
[2024-09-13 10:27:22,407 INFO L210 PostProcessor]: Analyzing one entry point: main
[2024-09-13 10:27:22,425 INFO L200 MainTranslator]: Completed pre-run
Start Parsing Global
[2024-09-13 10:27:22,473 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/Fibonacci01-1.c[804,817]
[2024-09-13 10:27:22,474 INFO L210 PostProcessor]: Analyzing one entry point: main
[2024-09-13 10:27:22,489 INFO L204 MainTranslator]: Completed translation
[2024-09-13 10:27:22,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22 WrapperNode
[2024-09-13 10:27:22,491 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2024-09-13 10:27:22,492 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2024-09-13 10:27:22,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner...
[2024-09-13 10:27:22,492 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized
[2024-09-13 10:27:22,499 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,505 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,520 INFO L138 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26
[2024-09-13 10:27:22,520 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2024-09-13 10:27:22,521 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2024-09-13 10:27:22,521 INFO L270 PluginConnector]: Initializing Boogie Preprocessor...
[2024-09-13 10:27:22,521 INFO L274 PluginConnector]: Boogie Preprocessor initialized
[2024-09-13 10:27:22,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,533 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,539 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure fibonacci is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification
[2024-09-13 10:27:22,540 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,540 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,545 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,546 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,550 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2024-09-13 10:27:22,552 INFO L112 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2024-09-13 10:27:22,552 INFO L270 PluginConnector]: Initializing RCFGBuilder...
[2024-09-13 10:27:22,553 INFO L274 PluginConnector]: RCFGBuilder initialized
[2024-09-13 10:27:22,553 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (1/1) ...
[2024-09-13 10:27:22,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000
[2024-09-13 10:27:22,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-13 10:27:22,584 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 10:27:22,590 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 10:27:22,638 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci
[2024-09-13 10:27:22,639 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci
[2024-09-13 10:27:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit
[2024-09-13 10:27:22,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2024-09-13 10:27:22,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2024-09-13 10:27:22,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2024-09-13 10:27:22,699 INFO L242 CfgBuilder]: Building ICFG
[2024-09-13 10:27:22,701 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation
[2024-09-13 10:27:22,821 INFO L? ?]: Removed 11 outVars from TransFormulas that were not future-live.
[2024-09-13 10:27:22,822 INFO L291 CfgBuilder]: Performing block encoding
[2024-09-13 10:27:22,850 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2024-09-13 10:27:22,850 INFO L318 CfgBuilder]: Removed 0 assume(true) statements.
[2024-09-13 10:27:22,851 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:27:22 BoogieIcfgContainer
[2024-09-13 10:27:22,851 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2024-09-13 10:27:22,853 INFO L112 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2024-09-13 10:27:22,855 INFO L270 PluginConnector]: Initializing TraceAbstraction...
[2024-09-13 10:27:22,858 INFO L274 PluginConnector]: TraceAbstraction initialized
[2024-09-13 10:27:22,859 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 10:27:20" (1/4) ...
[2024-09-13 10:27:22,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc1a965 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:27:22, skipping insertion in model container
[2024-09-13 10:27:22,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:27:22" (2/4) ...
[2024-09-13 10:27:22,861 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc1a965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:27:22, skipping insertion in model container
[2024-09-13 10:27:22,861 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:22" (3/4) ...
[2024-09-13 10:27:22,862 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cc1a965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:27:22, skipping insertion in model container
[2024-09-13 10:27:22,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:27:22" (4/4) ...
[2024-09-13 10:27:22,863 INFO L112 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c
[2024-09-13 10:27:22,878 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2024-09-13 10:27:22,879 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations.
[2024-09-13 10:27:22,921 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ========
[2024-09-13 10:27:22,927 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;@4e345d8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms]
[2024-09-13 10:27:22,927 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2024-09-13 10:27:22,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2024-09-13 10:27:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2024-09-13 10:27:22,936 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:22,937 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2024-09-13 10:27:22,938 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:22,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:22,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2111437232, now seen corresponding path program 1 times
[2024-09-13 10:27:22,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:22,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000875683]
[2024-09-13 10:27:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:22,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:23,149 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 10:27:23,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:23,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000875683]
[2024-09-13 10:27:23,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000875683] provided 1 perfect and 0 imperfect interpolant sequences
[2024-09-13 10:27:23,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-09-13 10:27:23,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-09-13 10:27:23,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657226349]
[2024-09-13 10:27:23,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-09-13 10:27:23,157 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-09-13 10:27:23,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:23,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-09-13 10:27:23,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2024-09-13 10:27:23,190 INFO L87 Difference]: Start difference. First operand has 19 states, 12 states have (on average 1.5) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-09-13 10:27:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:23,300 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions.
[2024-09-13 10:27:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2024-09-13 10:27:23,303 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6
[2024-09-13 10:27:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:23,309 INFO L225 Difference]: With dead ends: 24
[2024-09-13 10:27:23,310 INFO L226 Difference]: Without dead ends: 22
[2024-09-13 10:27:23,311 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 10:27:23,314 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:23,315 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-13 10:27:23,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2024-09-13 10:27:23,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18.
[2024-09-13 10:27:23,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2024-09-13 10:27:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions.
[2024-09-13 10:27:23,348 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 6
[2024-09-13 10:27:23,348 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:23,348 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions.
[2024-09-13 10:27:23,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-09-13 10:27:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions.
[2024-09-13 10:27:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2024-09-13 10:27:23,350 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:23,350 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2024-09-13 10:27:23,350 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2024-09-13 10:27:23,351 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:23,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:23,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1030045510, now seen corresponding path program 1 times
[2024-09-13 10:27:23,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:23,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424393971]
[2024-09-13 10:27:23,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:23,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:23,449 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 10:27:23,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:23,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424393971]
[2024-09-13 10:27:23,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424393971] provided 1 perfect and 0 imperfect interpolant sequences
[2024-09-13 10:27:23,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-09-13 10:27:23,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2024-09-13 10:27:23,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986349162]
[2024-09-13 10:27:23,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-09-13 10:27:23,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states
[2024-09-13 10:27:23,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:23,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2024-09-13 10:27:23,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2024-09-13 10:27:23,457 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-09-13 10:27:23,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:23,517 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions.
[2024-09-13 10:27:23,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2024-09-13 10:27:23,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7
[2024-09-13 10:27:23,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:23,518 INFO L225 Difference]: With dead ends: 20
[2024-09-13 10:27:23,518 INFO L226 Difference]: Without dead ends: 20
[2024-09-13 10:27:23,519 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2024-09-13 10:27:23,520 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:23,522 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-13 10:27:23,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2024-09-13 10:27:23,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18.
[2024-09-13 10:27:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3)
[2024-09-13 10:27:23,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions.
[2024-09-13 10:27:23,528 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 7
[2024-09-13 10:27:23,528 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:23,528 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions.
[2024-09-13 10:27:23,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-09-13 10:27:23,529 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions.
[2024-09-13 10:27:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2024-09-13 10:27:23,530 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:23,531 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-13 10:27:23,531 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2024-09-13 10:27:23,531 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:23,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:23,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1477801184, now seen corresponding path program 1 times
[2024-09-13 10:27:23,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:23,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955492718]
[2024-09-13 10:27:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:23,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:23,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2024-09-13 10:27:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:23,781 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 10:27:23,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:23,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955492718]
[2024-09-13 10:27:23,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955492718] provided 1 perfect and 0 imperfect interpolant sequences
[2024-09-13 10:27:23,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-09-13 10:27:23,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2024-09-13 10:27:23,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315143598]
[2024-09-13 10:27:23,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-09-13 10:27:23,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-09-13 10:27:23,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:23,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-09-13 10:27:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2024-09-13 10:27:23,785 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 10:27:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:23,862 INFO L93 Difference]: Finished difference Result 23 states and 29 transitions.
[2024-09-13 10:27:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2024-09-13 10:27:23,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 10
[2024-09-13 10:27:23,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:23,863 INFO L225 Difference]: With dead ends: 23
[2024-09-13 10:27:23,864 INFO L226 Difference]: Without dead ends: 21
[2024-09-13 10:27:23,864 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2024-09-13 10:27:23,865 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:23,865 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 27 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-13 10:27:23,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2024-09-13 10:27:23,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20.
[2024-09-13 10:27:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2024-09-13 10:27:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions.
[2024-09-13 10:27:23,871 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10
[2024-09-13 10:27:23,871 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:23,871 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions.
[2024-09-13 10:27:23,872 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 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 10:27:23,872 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions.
[2024-09-13 10:27:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2024-09-13 10:27:23,873 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:23,873 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-13 10:27:23,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2024-09-13 10:27:23,874 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:23,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2123175350, now seen corresponding path program 1 times
[2024-09-13 10:27:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:23,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504315802]
[2024-09-13 10:27:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:23,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2024-09-13 10:27:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:24,026 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 10:27:24,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:24,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504315802]
[2024-09-13 10:27:24,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504315802] provided 1 perfect and 0 imperfect interpolant sequences
[2024-09-13 10:27:24,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences.
[2024-09-13 10:27:24,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2024-09-13 10:27:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547256337]
[2024-09-13 10:27:24,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-09-13 10:27:24,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-09-13 10:27:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-09-13 10:27:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2024-09-13 10:27:24,031 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 10:27:24,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:24,116 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions.
[2024-09-13 10:27:24,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2024-09-13 10:27:24,116 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 11
[2024-09-13 10:27:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:24,117 INFO L225 Difference]: With dead ends: 23
[2024-09-13 10:27:24,118 INFO L226 Difference]: Without dead ends: 21
[2024-09-13 10:27:24,118 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2024-09-13 10:27:24,119 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 5 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:24,120 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 35 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-13 10:27:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2024-09-13 10:27:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19.
[2024-09-13 10:27:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5)
[2024-09-13 10:27:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions.
[2024-09-13 10:27:24,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11
[2024-09-13 10:27:24,129 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:24,129 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions.
[2024-09-13 10:27:24,130 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 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 10:27:24,130 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions.
[2024-09-13 10:27:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2024-09-13 10:27:24,131 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:24,132 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-13 10:27:24,132 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2024-09-13 10:27:24,132 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:24,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1561784175, now seen corresponding path program 1 times
[2024-09-13 10:27:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:24,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506061675]
[2024-09-13 10:27:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:24,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:24,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2024-09-13 10:27:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:24,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12
[2024-09-13 10:27:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2024-09-13 10:27:24,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:24,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506061675]
[2024-09-13 10:27:24,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506061675] provided 0 perfect and 1 imperfect interpolant sequences
[2024-09-13 10:27:24,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123621915]
[2024-09-13 10:27:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:24,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-13 10:27:24,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-13 10:27:24,241 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 10:27:24,244 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 10:27:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:24,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjuncts are in the unsatisfiable core
[2024-09-13 10:27:24,311 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2024-09-13 10:27:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2024-09-13 10:27:24,377 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2024-09-13 10:27:24,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123621915] provided 1 perfect and 0 imperfect interpolant sequences
[2024-09-13 10:27:24,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences.
[2024-09-13 10:27:24,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 7
[2024-09-13 10:27:24,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434904577]
[2024-09-13 10:27:24,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton
[2024-09-13 10:27:24,378 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states
[2024-09-13 10:27:24,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:24,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2024-09-13 10:27:24,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2024-09-13 10:27:24,380 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2024-09-13 10:27:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:24,446 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions.
[2024-09-13 10:27:24,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2024-09-13 10:27:24,447 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19
[2024-09-13 10:27:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:24,448 INFO L225 Difference]: With dead ends: 21
[2024-09-13 10:27:24,448 INFO L226 Difference]: Without dead ends: 21
[2024-09-13 10:27:24,448 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2024-09-13 10:27:24,450 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:24,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 26 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time]
[2024-09-13 10:27:24,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2024-09-13 10:27:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2024-09-13 10:27:24,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 16 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6)
[2024-09-13 10:27:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions.
[2024-09-13 10:27:24,460 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 19
[2024-09-13 10:27:24,460 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:24,460 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions.
[2024-09-13 10:27:24,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2)
[2024-09-13 10:27:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions.
[2024-09-13 10:27:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2024-09-13 10:27:24,463 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:24,463 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-13 10:27:24,479 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0
[2024-09-13 10:27:24,667 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-13 10:27:24,668 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:24,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:24,668 INFO L85 PathProgramCache]: Analyzing trace with hash -98894885, now seen corresponding path program 1 times
[2024-09-13 10:27:24,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:24,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350598652]
[2024-09-13 10:27:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:24,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:24,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:24,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-13 10:27:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:24,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2024-09-13 10:27:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2024-09-13 10:27:24,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:24,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350598652]
[2024-09-13 10:27:24,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350598652] provided 0 perfect and 1 imperfect interpolant sequences
[2024-09-13 10:27:24,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216471919]
[2024-09-13 10:27:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:24,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-13 10:27:24,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-13 10:27:24,959 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 10:27:24,960 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 10:27:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:24,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjuncts are in the unsatisfiable core
[2024-09-13 10:27:25,000 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2024-09-13 10:27:25,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked.
[2024-09-13 10:27:25,145 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2024-09-13 10:27:25,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2024-09-13 10:27:25,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216471919] provided 0 perfect and 2 imperfect interpolant sequences
[2024-09-13 10:27:25,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-09-13 10:27:25,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 21
[2024-09-13 10:27:25,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999966702]
[2024-09-13 10:27:25,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-09-13 10:27:25,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states
[2024-09-13 10:27:25,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:25,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2024-09-13 10:27:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462
[2024-09-13 10:27:25,431 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 22 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2024-09-13 10:27:25,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:25,638 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions.
[2024-09-13 10:27:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2024-09-13 10:27:25,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 24
[2024-09-13 10:27:25,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:25,640 INFO L225 Difference]: With dead ends: 26
[2024-09-13 10:27:25,640 INFO L226 Difference]: Without dead ends: 26
[2024-09-13 10:27:25,641 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650
[2024-09-13 10:27:25,641 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:25,642 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 63 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-13 10:27:25,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2024-09-13 10:27:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25.
[2024-09-13 10:27:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7)
[2024-09-13 10:27:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions.
[2024-09-13 10:27:25,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 24
[2024-09-13 10:27:25,647 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:25,647 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions.
[2024-09-13 10:27:25,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.7) internal successors, (34), 19 states have internal predecessors, (34), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)
[2024-09-13 10:27:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions.
[2024-09-13 10:27:25,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2024-09-13 10:27:25,648 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:25,648 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2024-09-13 10:27:25,665 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 10:27:25,849 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5
[2024-09-13 10:27:25,849 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:25,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:25,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1827260011, now seen corresponding path program 1 times
[2024-09-13 10:27:25,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:25,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898760766]
[2024-09-13 10:27:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:25,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:25,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2
[2024-09-13 10:27:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:26,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2024-09-13 10:27:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:26,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-13 10:27:26,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2024-09-13 10:27:26,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898760766]
[2024-09-13 10:27:26,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898760766] provided 0 perfect and 1 imperfect interpolant sequences
[2024-09-13 10:27:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340821099]
[2024-09-13 10:27:26,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:26,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-13 10:27:26,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-13 10:27:26,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-09-13 10:27:26,055 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process
[2024-09-13 10:27:26,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:26,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjuncts are in the unsatisfiable core
[2024-09-13 10:27:26,098 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2024-09-13 10:27:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2024-09-13 10:27:26,277 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2024-09-13 10:27:26,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2024-09-13 10:27:26,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340821099] provided 0 perfect and 2 imperfect interpolant sequences
[2024-09-13 10:27:26,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-09-13 10:27:26,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 20
[2024-09-13 10:27:26,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492143963]
[2024-09-13 10:27:26,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-09-13 10:27:26,627 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states
[2024-09-13 10:27:26,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:26,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2024-09-13 10:27:26,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380
[2024-09-13 10:27:26,630 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8)
[2024-09-13 10:27:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:26,893 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions.
[2024-09-13 10:27:26,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2024-09-13 10:27:26,893 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 24
[2024-09-13 10:27:26,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:26,894 INFO L225 Difference]: With dead ends: 27
[2024-09-13 10:27:26,894 INFO L226 Difference]: Without dead ends: 23
[2024-09-13 10:27:26,895 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650
[2024-09-13 10:27:26,895 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:26,896 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 21 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-09-13 10:27:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2024-09-13 10:27:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21.
[2024-09-13 10:27:26,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2024-09-13 10:27:26,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions.
[2024-09-13 10:27:26,900 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 24
[2024-09-13 10:27:26,900 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:26,900 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions.
[2024-09-13 10:27:26,900 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 16 states have internal predecessors, (33), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8)
[2024-09-13 10:27:26,901 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions.
[2024-09-13 10:27:26,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2024-09-13 10:27:26,902 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:26,902 INFO L216 NwaCegarLoop]: trace histogram [7, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1]
[2024-09-13 10:27:26,919 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0
[2024-09-13 10:27:27,106 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2024-09-13 10:27:27,107 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:27,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1689947079, now seen corresponding path program 2 times
[2024-09-13 10:27:27,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:27,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604183444]
[2024-09-13 10:27:27,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:27,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6
[2024-09-13 10:27:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2024-09-13 10:27:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2024-09-13 10:27:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-13 10:27:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2024-09-13 10:27:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,198 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked.
[2024-09-13 10:27:27,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:27,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604183444]
[2024-09-13 10:27:27,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604183444] provided 0 perfect and 1 imperfect interpolant sequences
[2024-09-13 10:27:27,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132935258]
[2024-09-13 10:27:27,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
[2024-09-13 10:27:27,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-13 10:27:27,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-13 10:27:27,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-09-13 10:27:27,202 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process
[2024-09-13 10:27:27,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2024-09-13 10:27:27,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjuncts are in the unsatisfiable core
[2024-09-13 10:27:27,253 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2024-09-13 10:27:27,276 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked.
[2024-09-13 10:27:27,276 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2024-09-13 10:27:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked.
[2024-09-13 10:27:27,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132935258] provided 0 perfect and 2 imperfect interpolant sequences
[2024-09-13 10:27:27,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-09-13 10:27:27,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9
[2024-09-13 10:27:27,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490343264]
[2024-09-13 10:27:27,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-09-13 10:27:27,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states
[2024-09-13 10:27:27,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2024-09-13 10:27:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2024-09-13 10:27:27,363 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7)
[2024-09-13 10:27:27,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:27,433 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions.
[2024-09-13 10:27:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2024-09-13 10:27:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44
[2024-09-13 10:27:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:27,434 INFO L225 Difference]: With dead ends: 27
[2024-09-13 10:27:27,434 INFO L226 Difference]: Without dead ends: 27
[2024-09-13 10:27:27,434 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110
[2024-09-13 10:27:27,436 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:27,436 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 17 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-13 10:27:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2024-09-13 10:27:27,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23.
[2024-09-13 10:27:27,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6)
[2024-09-13 10:27:27,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions.
[2024-09-13 10:27:27,440 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 44
[2024-09-13 10:27:27,440 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:27,440 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions.
[2024-09-13 10:27:27,441 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7)
[2024-09-13 10:27:27,441 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions.
[2024-09-13 10:27:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2024-09-13 10:27:27,441 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:27,442 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1]
[2024-09-13 10:27:27,454 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0
[2024-09-13 10:27:27,642 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-13 10:27:27,642 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:27,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:27,643 INFO L85 PathProgramCache]: Analyzing trace with hash 459466438, now seen corresponding path program 3 times
[2024-09-13 10:27:27,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:27,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013589955]
[2024-09-13 10:27:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:27,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-13 10:27:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2024-09-13 10:27:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-13 10:27:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2024-09-13 10:27:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked.
[2024-09-13 10:27:27,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:27,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013589955]
[2024-09-13 10:27:27,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013589955] provided 0 perfect and 1 imperfect interpolant sequences
[2024-09-13 10:27:27,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204252633]
[2024-09-13 10:27:27,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
[2024-09-13 10:27:27,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-13 10:27:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-13 10:27:27,784 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-09-13 10:27:27,785 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process
[2024-09-13 10:27:27,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2024-09-13 10:27:27,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2024-09-13 10:27:27,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core
[2024-09-13 10:27:27,832 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2024-09-13 10:27:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked.
[2024-09-13 10:27:27,878 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2024-09-13 10:27:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked.
[2024-09-13 10:27:28,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204252633] provided 0 perfect and 2 imperfect interpolant sequences
[2024-09-13 10:27:28,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-09-13 10:27:28,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 14
[2024-09-13 10:27:28,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782726704]
[2024-09-13 10:27:28,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-09-13 10:27:28,081 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states
[2024-09-13 10:27:28,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:28,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2024-09-13 10:27:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182
[2024-09-13 10:27:28,083 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7)
[2024-09-13 10:27:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:28,151 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions.
[2024-09-13 10:27:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2024-09-13 10:27:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 37
[2024-09-13 10:27:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:28,152 INFO L225 Difference]: With dead ends: 26
[2024-09-13 10:27:28,153 INFO L226 Difference]: Without dead ends: 26
[2024-09-13 10:27:28,153 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210
[2024-09-13 10:27:28,153 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:28,154 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time]
[2024-09-13 10:27:28,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2024-09-13 10:27:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25.
[2024-09-13 10:27:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5)
[2024-09-13 10:27:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions.
[2024-09-13 10:27:28,158 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 37
[2024-09-13 10:27:28,158 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:28,158 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions.
[2024-09-13 10:27:28,158 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7)
[2024-09-13 10:27:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions.
[2024-09-13 10:27:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2024-09-13 10:27:28,159 INFO L208 NwaCegarLoop]: Found error trace
[2024-09-13 10:27:28,159 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1]
[2024-09-13 10:27:28,176 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0
[2024-09-13 10:27:28,363 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-13 10:27:28,364 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION === [fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] ===
[2024-09-13 10:27:28,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier
[2024-09-13 10:27:28,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1380897048, now seen corresponding path program 4 times
[2024-09-13 10:27:28,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2024-09-13 10:27:28,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466807481]
[2024-09-13 10:27:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2024-09-13 10:27:28,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms
[2024-09-13 10:27:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:28,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-13 10:27:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:28,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2024-09-13 10:27:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:28,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2024-09-13 10:27:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:28,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2024-09-13 10:27:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2024-09-13 10:27:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 17 proven. 22 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked.
[2024-09-13 10:27:28,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace
[2024-09-13 10:27:28,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466807481]
[2024-09-13 10:27:28,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466807481] provided 0 perfect and 1 imperfect interpolant sequences
[2024-09-13 10:27:28,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838186359]
[2024-09-13 10:27:28,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
[2024-09-13 10:27:28,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2024-09-13 10:27:28,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3
[2024-09-13 10:27:28,638 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
[2024-09-13 10:27:28,639 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process
[2024-09-13 10:27:28,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2024-09-13 10:27:28,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2024-09-13 10:27:28,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 18 conjuncts are in the unsatisfiable core
[2024-09-13 10:27:28,687 INFO L285 TraceCheckSpWp]: Computing forward predicates...
[2024-09-13 10:27:28,824 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2024-09-13 10:27:28,824 INFO L327 TraceCheckSpWp]: Computing backward predicates...
[2024-09-13 10:27:29,085 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked.
[2024-09-13 10:27:29,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838186359] provided 0 perfect and 2 imperfect interpolant sequences
[2024-09-13 10:27:29,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences.
[2024-09-13 10:27:29,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 24
[2024-09-13 10:27:29,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650012445]
[2024-09-13 10:27:29,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton
[2024-09-13 10:27:29,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states
[2024-09-13 10:27:29,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2024-09-13 10:27:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2024-09-13 10:27:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600
[2024-09-13 10:27:29,114 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 25 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 9 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11)
[2024-09-13 10:27:29,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2024-09-13 10:27:29,405 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions.
[2024-09-13 10:27:29,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states.
[2024-09-13 10:27:29,406 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 9 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) Word has length 38
[2024-09-13 10:27:29,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2024-09-13 10:27:29,406 INFO L225 Difference]: With dead ends: 33
[2024-09-13 10:27:29,406 INFO L226 Difference]: Without dead ends: 0
[2024-09-13 10:27:29,407 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=1094, Unknown=0, NotChecked=0, Total=1332
[2024-09-13 10:27:29,407 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time
[2024-09-13 10:27:29,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time]
[2024-09-13 10:27:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2024-09-13 10:27:29,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2024-09-13 10:27:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)
[2024-09-13 10:27:29,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2024-09-13 10:27:29,408 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38
[2024-09-13 10:27:29,408 INFO L84 Accepts]: Finished accepts. word is rejected.
[2024-09-13 10:27:29,408 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2024-09-13 10:27:29,409 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 21 states have internal predecessors, (44), 9 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11)
[2024-09-13 10:27:29,409 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2024-09-13 10:27:29,409 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2024-09-13 10:27:29,412 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fibonacciErr0ENSURES_VIOLATIONPOST_CONDITION (1 of 2 remaining)
[2024-09-13 10:27:29,412 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining)
[2024-09-13 10:27:29,430 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0
[2024-09-13 10:27:29,613 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2024-09-13 10:27:29,616 INFO L408 BasicCegarLoop]: Path program histogram: [4, 1, 1, 1, 1, 1, 1]
[2024-09-13 10:27:29,618 INFO L165 ceAbstractionStarter]: Computing trace abstraction results
[2024-09-13 10:27:29,620 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 10:27:29 BoogieIcfgContainer
[2024-09-13 10:27:29,620 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2024-09-13 10:27:29,620 INFO L158 Benchmark]: Toolchain (without parser) took 7399.25ms. Allocated memory was 184.5MB in the beginning and 239.1MB in the end (delta: 54.5MB). Free memory was 125.3MB in the beginning and 181.7MB in the end (delta: -56.4MB). There was no memory consumed. Max. memory is 16.1GB.
[2024-09-13 10:27:29,620 INFO L158 Benchmark]: Witness Parser took 0.22ms. Allocated memory is still 184.5MB. Free memory was 147.4MB in the beginning and 147.2MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB.
[2024-09-13 10:27:29,620 INFO L158 Benchmark]: CDTParser took 0.83ms. Allocated memory is still 184.5MB. Free memory was 145.4MB in the beginning and 145.2MB in the end (delta: 168.2kB). There was no memory consumed. Max. memory is 16.1GB.
[2024-09-13 10:27:29,621 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.90ms. Allocated memory is still 184.5MB. Free memory was 125.3MB in the beginning and 112.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB.
[2024-09-13 10:27:29,621 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.57ms. Allocated memory is still 184.5MB. Free memory was 112.7MB in the beginning and 111.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB.
[2024-09-13 10:27:29,621 INFO L158 Benchmark]: Boogie Preprocessor took 30.48ms. Allocated memory is still 184.5MB. Free memory was 111.4MB in the beginning and 109.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
[2024-09-13 10:27:29,621 INFO L158 Benchmark]: RCFGBuilder took 298.59ms. Allocated memory is still 184.5MB. Free memory was 109.9MB in the beginning and 97.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB.
[2024-09-13 10:27:29,621 INFO L158 Benchmark]: TraceAbstraction took 6766.88ms. Allocated memory was 184.5MB in the beginning and 239.1MB in the end (delta: 54.5MB). Free memory was 96.7MB in the beginning and 181.7MB in the end (delta: -85.1MB). There was no memory consumed. Max. memory is 16.1GB.
[2024-09-13 10:27:29,623 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 0.22ms. Allocated memory is still 184.5MB. Free memory was 147.4MB in the beginning and 147.2MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB.
* CDTParser took 0.83ms. Allocated memory is still 184.5MB. Free memory was 145.4MB in the beginning and 145.2MB in the end (delta: 168.2kB). There was no memory consumed. Max. memory is 16.1GB.
* CACSL2BoogieTranslator took 268.90ms. Allocated memory is still 184.5MB. Free memory was 125.3MB in the beginning and 112.7MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB.
* Boogie Procedure Inliner took 28.57ms. Allocated memory is still 184.5MB. Free memory was 112.7MB in the beginning and 111.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB.
* Boogie Preprocessor took 30.48ms. Allocated memory is still 184.5MB. Free memory was 111.4MB in the beginning and 109.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB.
* RCFGBuilder took 298.59ms. Allocated memory is still 184.5MB. Free memory was 109.9MB in the beginning and 97.4MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB.
* TraceAbstraction took 6766.88ms. Allocated memory was 184.5MB in the beginning and 239.1MB in the end (delta: 54.5MB). Free memory was 96.7MB in the beginning and 181.7MB in the end (delta: -85.1MB). There was no memory consumed. 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
- PositiveResult [Line: 16]: procedure postcondition always holds
For all program executions holds that procedure postcondition always holds at this location
- PositiveResult [Line: 36]: a call to reach_error is unreachable
For all program executions holds that a call to reach_error is unreachable at this location
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 2 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 6.7s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 159 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 126 mSDsluCounter, 277 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 185 mSDsCounter, 87 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1237 IncrementalHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 87 mSolverCounterUnsat, 92 mSDtfsCounter, 1237 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 484 GetRequests, 343 SyntacticMatches, 17 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=6, InterpolantAutomatonStates: 83, 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, 17 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 406 NumberOfCodeBlocks, 406 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 552 ConstructedInterpolants, 0 QuantifiedInterpolants, 1586 SizeOfPredicates, 7 NumberOfNonLiveVariables, 549 ConjunctsInSsa, 64 ConjunctsInUnsatCore, 21 InterpolantComputations, 5 PerfectInterpolantSequences, 531/740 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
- AllSpecificationsHoldResult: All specifications hold
2 specifications checked. All of them hold
RESULT: Ultimate proved your program to be correct!
[2024-09-13 10:27:29,648 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0
Received shutdown request...