This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 20:24:54,842 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 20:24:54,912 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 20:24:54,918 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 20:24:54,918 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 20:24:54,942 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 20:24:54,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 20:24:54,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 20:24:54,945 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 20:24:54,947 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 20:24:54,947 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 20:24:54,947 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 20:24:54,949 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 20:24:54,950 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 20:24:54,950 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 20:24:54,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 20:24:54,950 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 20:24:54,950 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 20:24:54,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 20:24:54,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 20:24:54,951 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 20:24:54,954 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 20:24:54,954 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 20:24:54,954 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 20:24:54,954 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 20:24:54,954 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 20:24:54,955 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 20:24:54,955 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 20:24:54,955 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 20:24:54,955 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 20:24:54,955 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 20:24:54,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 20:24:54,955 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 20:24:54,956 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 20:24:54,956 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 20:24:54,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 20:24:54,956 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 20:24:54,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 20:24:54,956 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 20:24:54,957 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 20:24:54,957 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 20:24:54,959 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 20:24:54,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-15 20:24:55,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 20:24:55,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 20:24:55,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 20:24:55,286 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-15 20:24:55,287 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-15 20:24:55,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_6-1.yml/witness-2.1.yml [2024-09-15 20:24:55,341 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 20:24:55,342 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 20:24:55,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2024-09-15 20:24:56,767 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 20:24:56,944 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 20:24:56,945 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2024-09-15 20:24:56,951 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/561933407/80e35768aa4b40c0af5dac6f387754f1/FLAGedd1d4266 [2024-09-15 20:24:57,342 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/561933407/80e35768aa4b40c0af5dac6f387754f1 [2024-09-15 20:24:57,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 20:24:57,344 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-15 20:24:57,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 20:24:57,345 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 20:24:57,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 20:24:57,349 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 15.09 08:24:55" (1/2) ... [2024-09-15 20:24:57,350 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed77503 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:57, skipping insertion in model container [2024-09-15 20:24:57,350 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 15.09 08:24:55" (1/2) ... [2024-09-15 20:24:57,351 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@739101ef and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:57, skipping insertion in model container [2024-09-15 20:24:57,352 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 08:24:57" (2/2) ... [2024-09-15 20:24:57,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed77503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57, skipping insertion in model container [2024-09-15 20:24:57,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 08:24:57" (2/2) ... [2024-09-15 20:24:57,357 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-15 20:24:57,357 INFO L1541 ArrayList]: Function contract at [L19]: requires null, ensures (((((((((2 == \result) && (3 == \old(n))) || ((\result == 1) && (\old(n) == 1))) || (5 < \old(n))) || ((3 == \result) && (\old(n) == 4))) || (\old(n) < 1)) || ((5 == \result) && (5 == \old(n)))) || ((\result == 1) && (2 == \old(n)))) && (((\result == 0) || (\old(n) == 1)) || (1 < \old(n)))) [2024-09-15 20:24:57,357 INFO L1541 ArrayList]: Function contract at [L9]: requires null, ensures ((\result == 0) || (0 < \old(n))) [2024-09-15 20:24:57,385 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 20:24:57,518 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c[946,959] [2024-09-15 20:24:57,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 20:24:57,538 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global [2024-09-15 20:24:57,576 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c[946,959] [2024-09-15 20:24:57,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 20:24:57,590 INFO L204 MainTranslator]: Completed translation [2024-09-15 20:24:57,590 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57 WrapperNode [2024-09-15 20:24:57,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 20:24:57,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 20:24:57,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 20:24:57,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 20:24:57,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,603 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,615 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-15 20:24:57,615 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 20:24:57,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 20:24:57,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 20:24:57,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 20:24:57,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,630 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,655 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure fibo2 is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-15 20:24:57,655 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,656 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,661 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,666 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,666 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,668 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 20:24:57,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 20:24:57,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 20:24:57,671 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 20:24:57,671 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (1/1) ... [2024-09-15 20:24:57,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 20:24:57,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:57,695 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) [2024-09-15 20:24:57,704 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 [2024-09-15 20:24:57,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 20:24:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-15 20:24:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-09-15 20:24:57,744 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-09-15 20:24:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-09-15 20:24:57,744 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-09-15 20:24:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 20:24:57,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 20:24:57,800 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 20:24:57,802 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 20:24:57,945 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-09-15 20:24:57,945 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 20:24:57,967 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 20:24:57,967 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-15 20:24:57,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 08:24:57 BoogieIcfgContainer [2024-09-15 20:24:57,968 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 20:24:57,969 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 20:24:57,971 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 20:24:57,974 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 20:24:57,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 15.09 08:24:55" (1/4) ... [2024-09-15 20:24:57,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12af41de and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 15.09 08:24:57, skipping insertion in model container [2024-09-15 20:24:57,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 08:24:57" (2/4) ... [2024-09-15 20:24:57,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12af41de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 08:24:57, skipping insertion in model container [2024-09-15 20:24:57,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:57" (3/4) ... [2024-09-15 20:24:57,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12af41de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 08:24:57, skipping insertion in model container [2024-09-15 20:24:57,976 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 08:24:57" (4/4) ... [2024-09-15 20:24:57,977 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2024-09-15 20:24:57,991 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 20:24:57,991 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-09-15 20:24:58,047 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 20:24:58,055 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;@7e9122b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 20:24:58,056 INFO L337 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-09-15 20:24:58,060 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 20:24:58,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-15 20:24:58,068 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:58,068 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-15 20:24:58,069 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:58,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash 83656213, now seen corresponding path program 1 times [2024-09-15 20:24:58,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886940103] [2024-09-15 20:24:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:58,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:58,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:58,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886940103] [2024-09-15 20:24:58,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886940103] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:58,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:58,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 20:24:58,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123347013] [2024-09-15 20:24:58,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:58,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 20:24:58,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:58,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 20:24:58,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 20:24:58,285 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:58,313 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2024-09-15 20:24:58,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 20:24:58,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-15 20:24:58,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:58,325 INFO L225 Difference]: With dead ends: 30 [2024-09-15 20:24:58,325 INFO L226 Difference]: Without dead ends: 28 [2024-09-15 20:24:58,326 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 20:24:58,329 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:58,330 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:24:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-15 20:24:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-09-15 20:24:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 19 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 20:24:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-15 20:24:58,385 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 5 [2024-09-15 20:24:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:58,386 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-15 20:24:58,386 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-15 20:24:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-15 20:24:58,388 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:58,389 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-15 20:24:58,389 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 20:24:58,390 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:58,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:58,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1701623902, now seen corresponding path program 1 times [2024-09-15 20:24:58,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:58,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698573250] [2024-09-15 20:24:58,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:58,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:58,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:58,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698573250] [2024-09-15 20:24:58,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698573250] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:58,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:58,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 20:24:58,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762913167] [2024-09-15 20:24:58,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:58,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 20:24:58,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:58,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 20:24:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 20:24:58,449 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2024-09-15 20:24:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:58,472 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-09-15 20:24:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 20:24:58,473 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 3 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 [2024-09-15 20:24:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:58,473 INFO L225 Difference]: With dead ends: 37 [2024-09-15 20:24:58,473 INFO L226 Difference]: Without dead ends: 37 [2024-09-15 20:24:58,474 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 20:24:58,475 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:58,475 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:24:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-15 20:24:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-09-15 20:24:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 20:24:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-15 20:24:58,481 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 6 [2024-09-15 20:24:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:58,481 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-15 20:24:58,482 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 3 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) [2024-09-15 20:24:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-15 20:24:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-15 20:24:58,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:58,482 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:58,482 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 20:24:58,483 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:58,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:58,483 INFO L85 PathProgramCache]: Analyzing trace with hash 422480245, now seen corresponding path program 1 times [2024-09-15 20:24:58,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:58,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545678999] [2024-09-15 20:24:58,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:58,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:58,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:58,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545678999] [2024-09-15 20:24:58,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545678999] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:58,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:58,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 20:24:58,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616779099] [2024-09-15 20:24:58,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:58,606 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 20:24:58,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:58,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 20:24:58,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 20:24:58,607 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:58,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:58,664 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2024-09-15 20:24:58,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 20:24:58,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-09-15 20:24:58,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:58,666 INFO L225 Difference]: With dead ends: 41 [2024-09-15 20:24:58,666 INFO L226 Difference]: Without dead ends: 41 [2024-09-15 20:24:58,666 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 [2024-09-15 20:24:58,667 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:58,667 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:24:58,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-15 20:24:58,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-09-15 20:24:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 states have internal predecessors, (32), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 20:24:58,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-09-15 20:24:58,673 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 9 [2024-09-15 20:24:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:58,673 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-09-15 20:24:58,674 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-09-15 20:24:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-15 20:24:58,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:58,674 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:58,674 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 20:24:58,675 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:58,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:58,675 INFO L85 PathProgramCache]: Analyzing trace with hash 398305833, now seen corresponding path program 1 times [2024-09-15 20:24:58,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879390221] [2024-09-15 20:24:58,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:58,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:58,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 20:24:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:58,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:58,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879390221] [2024-09-15 20:24:58,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879390221] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:58,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:58,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 20:24:58,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571087075] [2024-09-15 20:24:58,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:58,763 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:24:58,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:58,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:24:58,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:24:58,766 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 20:24:58,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:58,826 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2024-09-15 20:24:58,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 20:24:58,827 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-09-15 20:24:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:58,828 INFO L225 Difference]: With dead ends: 45 [2024-09-15 20:24:58,828 INFO L226 Difference]: Without dead ends: 43 [2024-09-15 20:24:58,828 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 20:24:58,829 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:58,830 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:24:58,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-15 20:24:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2024-09-15 20:24:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 20:24:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-09-15 20:24:58,836 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 9 [2024-09-15 20:24:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:58,836 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-09-15 20:24:58,836 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 20:24:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-09-15 20:24:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-15 20:24:58,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:58,837 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:58,837 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-15 20:24:58,838 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:58,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:58,838 INFO L85 PathProgramCache]: Analyzing trace with hash 211986483, now seen corresponding path program 1 times [2024-09-15 20:24:58,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:58,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893787082] [2024-09-15 20:24:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:58,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:58,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:58,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893787082] [2024-09-15 20:24:58,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893787082] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:58,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:58,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-15 20:24:58,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668904718] [2024-09-15 20:24:58,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:58,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 20:24:58,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:58,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 20:24:58,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-15 20:24:58,908 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:58,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:58,981 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-09-15 20:24:58,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 20:24:58,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-15 20:24:58,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:58,983 INFO L225 Difference]: With dead ends: 47 [2024-09-15 20:24:58,983 INFO L226 Difference]: Without dead ends: 47 [2024-09-15 20:24:58,983 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-15 20:24:58,984 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:58,985 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 149 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:24:58,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-15 20:24:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-15 20:24:58,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-15 20:24:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-09-15 20:24:58,990 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2024-09-15 20:24:58,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:58,990 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-09-15 20:24:58,991 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-09-15 20:24:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 20:24:58,991 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:58,991 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:58,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-15 20:24:58,991 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:58,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash 815752847, now seen corresponding path program 1 times [2024-09-15 20:24:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:58,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566619544] [2024-09-15 20:24:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:59,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:59,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566619544] [2024-09-15 20:24:59,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566619544] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:59,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:59,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 20:24:59,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636336029] [2024-09-15 20:24:59,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:59,034 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:24:59,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:59,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:24:59,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:24:59,035 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:59,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:59,057 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2024-09-15 20:24:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:24:59,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-09-15 20:24:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:59,058 INFO L225 Difference]: With dead ends: 59 [2024-09-15 20:24:59,058 INFO L226 Difference]: Without dead ends: 59 [2024-09-15 20:24:59,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:24:59,059 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:59,059 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 118 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:24:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-15 20:24:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2024-09-15 20:24:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-15 20:24:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-09-15 20:24:59,069 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 14 [2024-09-15 20:24:59,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:59,069 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-09-15 20:24:59,069 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:59,070 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-09-15 20:24:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 20:24:59,070 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:59,070 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:59,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-15 20:24:59,071 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:59,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:59,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1887144096, now seen corresponding path program 1 times [2024-09-15 20:24:59,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:59,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999589129] [2024-09-15 20:24:59,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:59,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:59,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:59,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999589129] [2024-09-15 20:24:59,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999589129] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:59,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334381486] [2024-09-15 20:24:59,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:59,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:59,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:59,186 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) [2024-09-15 20:24:59,194 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 20:24:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:59,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 20:24:59,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:59,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:59,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334381486] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:59,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:59,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-09-15 20:24:59,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241497664] [2024-09-15 20:24:59,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:59,441 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 20:24:59,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:59,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 20:24:59,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-15 20:24:59,442 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:59,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:59,718 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2024-09-15 20:24:59,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 20:24:59,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.5) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-09-15 20:24:59,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:59,720 INFO L225 Difference]: With dead ends: 113 [2024-09-15 20:24:59,721 INFO L226 Difference]: Without dead ends: 113 [2024-09-15 20:24:59,721 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-09-15 20:24:59,722 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 87 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:59,722 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 380 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:24:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-15 20:24:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-09-15 20:24:59,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-15 20:24:59,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-09-15 20:24:59,738 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 18 [2024-09-15 20:24:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:59,738 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-09-15 20:24:59,739 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.5) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:59,739 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-09-15 20:24:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 20:24:59,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:59,739 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-15 20:24:59,754 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 20:24:59,940 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-15 20:24:59,940 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:59,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:59,942 INFO L85 PathProgramCache]: Analyzing trace with hash 2123869197, now seen corresponding path program 2 times [2024-09-15 20:24:59,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:59,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866777818] [2024-09-15 20:24:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:59,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:59,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:00,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:00,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866777818] [2024-09-15 20:25:00,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866777818] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:00,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268401900] [2024-09-15 20:25:00,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:25:00,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:00,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:00,349 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) [2024-09-15 20:25:00,351 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 20:25:00,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-15 20:25:00,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:00,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 20:25:00,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 20:25:00,452 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 20:25:00,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268401900] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:25:00,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 20:25:00,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 18 [2024-09-15 20:25:00,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648595430] [2024-09-15 20:25:00,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:25:00,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:25:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:25:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-15 20:25:00,455 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:25:00,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:00,504 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2024-09-15 20:25:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:25:00,505 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-09-15 20:25:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:00,507 INFO L225 Difference]: With dead ends: 112 [2024-09-15 20:25:00,510 INFO L226 Difference]: Without dead ends: 112 [2024-09-15 20:25:00,510 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-15 20:25:00,511 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:00,511 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 81 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:25:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-15 20:25:00,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2024-09-15 20:25:00,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-15 20:25:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-09-15 20:25:00,527 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 26 [2024-09-15 20:25:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:00,527 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-09-15 20:25:00,527 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:25:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-09-15 20:25:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 20:25:00,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:00,528 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:00,563 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 20:25:00,728 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:00,729 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:00,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:00,730 INFO L85 PathProgramCache]: Analyzing trace with hash 512134780, now seen corresponding path program 1 times [2024-09-15 20:25:00,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:00,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433258344] [2024-09-15 20:25:00,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:00,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:00,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 20:25:00,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 20:25:00,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:00,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433258344] [2024-09-15 20:25:00,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433258344] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:25:00,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:25:00,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 20:25:00,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943547113] [2024-09-15 20:25:00,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:25:00,776 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 20:25:00,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:00,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 20:25:00,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 20:25:00,778 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 20:25:00,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:00,845 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2024-09-15 20:25:00,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:25:00,846 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-15 20:25:00,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:00,847 INFO L225 Difference]: With dead ends: 115 [2024-09-15 20:25:00,847 INFO L226 Difference]: Without dead ends: 115 [2024-09-15 20:25:00,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:25:00,847 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:00,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:25:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-15 20:25:00,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2024-09-15 20:25:00,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-15 20:25:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2024-09-15 20:25:00,856 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 28 [2024-09-15 20:25:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:00,857 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2024-09-15 20:25:00,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 20:25:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2024-09-15 20:25:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 20:25:00,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:00,858 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:00,858 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-15 20:25:00,858 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:00,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:00,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1760453507, now seen corresponding path program 1 times [2024-09-15 20:25:00,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:00,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270572252] [2024-09-15 20:25:00,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:00,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:00,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:00,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 20:25:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:00,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:00,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-15 20:25:00,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:00,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270572252] [2024-09-15 20:25:00,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270572252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:00,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164944889] [2024-09-15 20:25:00,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:00,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:00,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:00,906 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) [2024-09-15 20:25:00,907 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 20:25:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:00,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 20:25:00,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:01,043 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:01,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164944889] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:01,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:01,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 25 [2024-09-15 20:25:01,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957920053] [2024-09-15 20:25:01,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:01,210 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 20:25:01,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:01,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 20:25:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2024-09-15 20:25:01,211 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 17 states have internal predecessors, (50), 12 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-15 20:25:01,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:01,515 INFO L93 Difference]: Finished difference Result 120 states and 147 transitions. [2024-09-15 20:25:01,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 20:25:01,516 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 17 states have internal predecessors, (50), 12 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-09-15 20:25:01,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:01,517 INFO L225 Difference]: With dead ends: 120 [2024-09-15 20:25:01,517 INFO L226 Difference]: Without dead ends: 118 [2024-09-15 20:25:01,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2024-09-15 20:25:01,518 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:01,518 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 303 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:25:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-15 20:25:01,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2024-09-15 20:25:01,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 74 states have internal predecessors, (82), 23 states have call successors, (23), 11 states have call predecessors, (23), 12 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-09-15 20:25:01,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-09-15 20:25:01,525 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 30 [2024-09-15 20:25:01,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:01,525 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-09-15 20:25:01,525 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 17 states have internal predecessors, (50), 12 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-15 20:25:01,525 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-09-15 20:25:01,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 20:25:01,526 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:01,526 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:01,540 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 20:25:01,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 20:25:01,730 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:01,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:01,731 INFO L85 PathProgramCache]: Analyzing trace with hash 69552029, now seen corresponding path program 1 times [2024-09-15 20:25:01,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:01,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611359282] [2024-09-15 20:25:01,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:01,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:01,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 20:25:01,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:01,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 20:25:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:01,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611359282] [2024-09-15 20:25:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611359282] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:01,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88799583] [2024-09-15 20:25:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:01,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:01,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:01,841 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) [2024-09-15 20:25:01,842 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 20:25:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:01,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 20:25:01,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:01,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:02,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88799583] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:02,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:02,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-15 20:25:02,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484022433] [2024-09-15 20:25:02,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:02,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 20:25:02,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:02,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 20:25:02,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-15 20:25:02,046 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 20:25:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:02,220 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2024-09-15 20:25:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 20:25:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-09-15 20:25:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:02,222 INFO L225 Difference]: With dead ends: 115 [2024-09-15 20:25:02,222 INFO L226 Difference]: Without dead ends: 115 [2024-09-15 20:25:02,222 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-15 20:25:02,223 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:02,223 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 195 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:25:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-15 20:25:02,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2024-09-15 20:25:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 76 states have internal predecessors, (83), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (27), 23 states have call predecessors, (27), 23 states have call successors, (27) [2024-09-15 20:25:02,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2024-09-15 20:25:02,229 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 32 [2024-09-15 20:25:02,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:02,229 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2024-09-15 20:25:02,229 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-15 20:25:02,229 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2024-09-15 20:25:02,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-15 20:25:02,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:02,230 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:02,244 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 20:25:02,434 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:02,435 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:02,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash -908221233, now seen corresponding path program 1 times [2024-09-15 20:25:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:02,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567992363] [2024-09-15 20:25:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:02,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 20:25:02,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 20:25:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,616 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 20:25:02,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:02,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567992363] [2024-09-15 20:25:02,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567992363] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:02,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112146031] [2024-09-15 20:25:02,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:02,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:02,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:02,618 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) [2024-09-15 20:25:02,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 20:25:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 20:25:02,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:25:02,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:02,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112146031] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:02,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:02,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 19 [2024-09-15 20:25:02,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699066358] [2024-09-15 20:25:02,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:02,856 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 20:25:02,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:02,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 20:25:02,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-09-15 20:25:02,857 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 20:25:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:03,122 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2024-09-15 20:25:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 20:25:03,122 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-09-15 20:25:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:03,123 INFO L225 Difference]: With dead ends: 133 [2024-09-15 20:25:03,123 INFO L226 Difference]: Without dead ends: 131 [2024-09-15 20:25:03,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2024-09-15 20:25:03,124 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:03,124 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 157 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:25:03,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-15 20:25:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2024-09-15 20:25:03,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 83 states have (on average 1.144578313253012) internal successors, (95), 86 states have internal predecessors, (95), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (29), 25 states have call predecessors, (29), 25 states have call successors, (29) [2024-09-15 20:25:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2024-09-15 20:25:03,134 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 39 [2024-09-15 20:25:03,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:03,134 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2024-09-15 20:25:03,134 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 20:25:03,134 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2024-09-15 20:25:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 20:25:03,135 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:03,135 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:03,160 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 20:25:03,335 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-15 20:25:03,336 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:03,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:03,337 INFO L85 PathProgramCache]: Analyzing trace with hash -236551542, now seen corresponding path program 1 times [2024-09-15 20:25:03,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:03,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964765699] [2024-09-15 20:25:03,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:03,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:03,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 20:25:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:03,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-15 20:25:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 20:25:03,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-15 20:25:03,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:03,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964765699] [2024-09-15 20:25:03,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964765699] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:03,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767324315] [2024-09-15 20:25:03,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:03,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:03,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:03,414 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) [2024-09-15 20:25:03,415 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 20:25:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 20:25:03,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:03,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:03,768 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 20:25:03,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767324315] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:03,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:03,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 15] total 20 [2024-09-15 20:25:03,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705369574] [2024-09-15 20:25:03,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:03,769 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 20:25:03,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 20:25:03,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-09-15 20:25:03,770 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-15 20:25:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:04,007 INFO L93 Difference]: Finished difference Result 136 states and 166 transitions. [2024-09-15 20:25:04,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 20:25:04,008 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 7 states have call successors, (9) Word has length 44 [2024-09-15 20:25:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:04,009 INFO L225 Difference]: With dead ends: 136 [2024-09-15 20:25:04,009 INFO L226 Difference]: Without dead ends: 136 [2024-09-15 20:25:04,009 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-09-15 20:25:04,009 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:04,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 246 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:25:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-15 20:25:04,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2024-09-15 20:25:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 90 states have internal predecessors, (97), 25 states have call successors, (25), 13 states have call predecessors, (25), 17 states have return successors, (34), 25 states have call predecessors, (34), 25 states have call successors, (34) [2024-09-15 20:25:04,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2024-09-15 20:25:04,015 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 44 [2024-09-15 20:25:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:04,015 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2024-09-15 20:25:04,015 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-15 20:25:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2024-09-15 20:25:04,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-15 20:25:04,016 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:04,016 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:04,030 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 20:25:04,217 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 20:25:04,217 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:04,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2138826648, now seen corresponding path program 1 times [2024-09-15 20:25:04,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:04,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138745601] [2024-09-15 20:25:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:04,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 20:25:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 20:25:04,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:04,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138745601] [2024-09-15 20:25:04,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138745601] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:04,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41745566] [2024-09-15 20:25:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:04,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:04,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:04,495 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:04,496 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 20:25:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:04,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 20:25:04,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 20:25:04,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 20:25:05,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41745566] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:05,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:05,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2024-09-15 20:25:05,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070506430] [2024-09-15 20:25:05,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:05,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-15 20:25:05,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-15 20:25:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2024-09-15 20:25:05,392 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 30 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 20 states have internal predecessors, (46), 14 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 20:25:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:05,818 INFO L93 Difference]: Finished difference Result 149 states and 186 transitions. [2024-09-15 20:25:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 20:25:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 20 states have internal predecessors, (46), 14 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 45 [2024-09-15 20:25:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:05,819 INFO L225 Difference]: With dead ends: 149 [2024-09-15 20:25:05,820 INFO L226 Difference]: Without dead ends: 149 [2024-09-15 20:25:05,820 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 20:25:05,820 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:05,821 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 512 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:25:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-15 20:25:05,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 139. [2024-09-15 20:25:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 96 states have internal predecessors, (104), 26 states have call successors, (26), 13 states have call predecessors, (26), 19 states have return successors, (42), 29 states have call predecessors, (42), 26 states have call successors, (42) [2024-09-15 20:25:05,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 172 transitions. [2024-09-15 20:25:05,830 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 172 transitions. Word has length 45 [2024-09-15 20:25:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:05,830 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 172 transitions. [2024-09-15 20:25:05,830 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 20 states have internal predecessors, (46), 14 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 20:25:05,830 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 172 transitions. [2024-09-15 20:25:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 20:25:05,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:05,835 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:05,854 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 20:25:06,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:06,036 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:06,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1824085626, now seen corresponding path program 1 times [2024-09-15 20:25:06,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:06,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325399200] [2024-09-15 20:25:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:06,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:06,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 20:25:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:06,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:06,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:06,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 20:25:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 20:25:06,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:06,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325399200] [2024-09-15 20:25:06,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325399200] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:06,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146971739] [2024-09-15 20:25:06,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:06,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:06,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:06,192 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:06,193 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 20:25:06,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:06,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 20:25:06,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:06,282 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:25:06,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 20:25:06,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146971739] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:06,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:06,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 21 [2024-09-15 20:25:06,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917625286] [2024-09-15 20:25:06,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:06,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 20:25:06,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 20:25:06,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-09-15 20:25:06,444 INFO L87 Difference]: Start difference. First operand 139 states and 172 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-15 20:25:06,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:06,715 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2024-09-15 20:25:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 20:25:06,715 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 46 [2024-09-15 20:25:06,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:06,716 INFO L225 Difference]: With dead ends: 155 [2024-09-15 20:25:06,717 INFO L226 Difference]: Without dead ends: 153 [2024-09-15 20:25:06,717 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 20:25:06,717 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:06,718 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 152 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:25:06,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-15 20:25:06,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2024-09-15 20:25:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 94 states have internal predecessors, (101), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (37), 26 states have call predecessors, (37), 26 states have call successors, (37) [2024-09-15 20:25:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 164 transitions. [2024-09-15 20:25:06,723 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 164 transitions. Word has length 46 [2024-09-15 20:25:06,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:06,723 INFO L474 AbstractCegarLoop]: Abstraction has 136 states and 164 transitions. [2024-09-15 20:25:06,723 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-15 20:25:06,723 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 164 transitions. [2024-09-15 20:25:06,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-15 20:25:06,724 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:06,724 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:06,742 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 20:25:06,928 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:06,929 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:06,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:06,930 INFO L85 PathProgramCache]: Analyzing trace with hash -419169308, now seen corresponding path program 1 times [2024-09-15 20:25:06,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:06,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68668942] [2024-09-15 20:25:06,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:06,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-15 20:25:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 20:25:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-15 20:25:07,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 20:25:07,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:07,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68668942] [2024-09-15 20:25:07,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68668942] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:07,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575267897] [2024-09-15 20:25:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:07,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:07,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:07,306 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:07,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 20:25:07,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-15 20:25:07,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 20:25:07,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-15 20:25:08,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575267897] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:08,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:08,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2024-09-15 20:25:08,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109266431] [2024-09-15 20:25:08,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:08,372 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 20:25:08,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:08,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 20:25:08,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2024-09-15 20:25:08,373 INFO L87 Difference]: Start difference. First operand 136 states and 164 transitions. Second operand has 26 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 18 states have internal predecessors, (53), 13 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-15 20:25:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:09,077 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2024-09-15 20:25:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-15 20:25:09,078 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 18 states have internal predecessors, (53), 13 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 65 [2024-09-15 20:25:09,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:09,079 INFO L225 Difference]: With dead ends: 176 [2024-09-15 20:25:09,079 INFO L226 Difference]: Without dead ends: 176 [2024-09-15 20:25:09,080 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 20:25:09,080 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 82 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:09,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 598 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 20:25:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-15 20:25:09,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 162. [2024-09-15 20:25:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 110 states have internal predecessors, (123), 32 states have call successors, (32), 17 states have call predecessors, (32), 20 states have return successors, (45), 34 states have call predecessors, (45), 32 states have call successors, (45) [2024-09-15 20:25:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 200 transitions. [2024-09-15 20:25:09,085 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 200 transitions. Word has length 65 [2024-09-15 20:25:09,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:09,086 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 200 transitions. [2024-09-15 20:25:09,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 18 states have internal predecessors, (53), 13 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-15 20:25:09,086 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 200 transitions. [2024-09-15 20:25:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-15 20:25:09,087 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:09,087 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:09,099 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-15 20:25:09,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 20:25:09,288 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:09,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash -86445099, now seen corresponding path program 2 times [2024-09-15 20:25:09,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:09,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328650709] [2024-09-15 20:25:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:09,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-15 20:25:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 20:25:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-15 20:25:09,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-15 20:25:09,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:09,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328650709] [2024-09-15 20:25:09,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328650709] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:09,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58679622] [2024-09-15 20:25:09,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:25:09,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:09,423 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:09,424 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 20:25:09,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 20:25:09,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:09,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 20:25:09,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:09,505 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 37 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-15 20:25:09,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 37 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-15 20:25:09,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58679622] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:09,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:09,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-15 20:25:09,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144688542] [2024-09-15 20:25:09,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:09,622 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 20:25:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:09,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 20:25:09,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-09-15 20:25:09,622 INFO L87 Difference]: Start difference. First operand 162 states and 200 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-15 20:25:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:09,835 INFO L93 Difference]: Finished difference Result 184 states and 222 transitions. [2024-09-15 20:25:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 20:25:09,836 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 66 [2024-09-15 20:25:09,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:09,836 INFO L225 Difference]: With dead ends: 184 [2024-09-15 20:25:09,837 INFO L226 Difference]: Without dead ends: 180 [2024-09-15 20:25:09,837 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-09-15 20:25:09,837 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:09,837 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 168 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:25:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-15 20:25:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2024-09-15 20:25:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 115 states have (on average 1.1391304347826088) internal successors, (131), 117 states have internal predecessors, (131), 34 states have call successors, (34), 18 states have call predecessors, (34), 21 states have return successors, (43), 36 states have call predecessors, (43), 34 states have call successors, (43) [2024-09-15 20:25:09,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2024-09-15 20:25:09,846 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 66 [2024-09-15 20:25:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:09,847 INFO L474 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2024-09-15 20:25:09,847 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-15 20:25:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2024-09-15 20:25:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-15 20:25:09,848 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:09,848 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-15 20:25:09,903 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-15 20:25:10,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-15 20:25:10,052 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:10,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash -44229639, now seen corresponding path program 2 times [2024-09-15 20:25:10,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:10,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865944364] [2024-09-15 20:25:10,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:10,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:10,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-15 20:25:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 20:25:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-15 20:25:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 39 proven. 50 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-15 20:25:10,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:10,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865944364] [2024-09-15 20:25:10,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865944364] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:10,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711561185] [2024-09-15 20:25:10,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:25:10,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:10,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:10,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:10,259 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 20:25:10,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 20:25:10,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:10,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 20:25:10,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 66 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-15 20:25:10,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:10,547 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 53 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-15 20:25:10,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711561185] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:10,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:10,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 20 [2024-09-15 20:25:10,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895268942] [2024-09-15 20:25:10,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:10,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 20:25:10,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:10,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 20:25:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-09-15 20:25:10,549 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 5 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-15 20:25:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:10,801 INFO L93 Difference]: Finished difference Result 174 states and 206 transitions. [2024-09-15 20:25:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-15 20:25:10,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 5 states have call predecessors, (13), 8 states have call successors, (13) Word has length 78 [2024-09-15 20:25:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:10,802 INFO L225 Difference]: With dead ends: 174 [2024-09-15 20:25:10,802 INFO L226 Difference]: Without dead ends: 174 [2024-09-15 20:25:10,803 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 158 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-15 20:25:10,803 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:10,803 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 152 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:25:10,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-15 20:25:10,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2024-09-15 20:25:10,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 109 states have (on average 1.128440366972477) internal successors, (123), 113 states have internal predecessors, (123), 32 states have call successors, (32), 18 states have call predecessors, (32), 21 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2024-09-15 20:25:10,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2024-09-15 20:25:10,808 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 78 [2024-09-15 20:25:10,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:10,808 INFO L474 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2024-09-15 20:25:10,808 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 5 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-15 20:25:10,809 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2024-09-15 20:25:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-15 20:25:10,809 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:10,809 INFO L216 NwaCegarLoop]: trace histogram [9, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-15 20:25:10,823 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-15 20:25:11,010 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-15 20:25:11,011 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:11,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash 2007748268, now seen corresponding path program 3 times [2024-09-15 20:25:11,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:11,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562355969] [2024-09-15 20:25:11,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:11,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:11,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-15 20:25:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:11,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-15 20:25:11,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-15 20:25:11,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:11,293 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-09-15 20:25:11,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:11,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562355969] [2024-09-15 20:25:11,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562355969] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:11,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398003732] [2024-09-15 20:25:11,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 20:25:11,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:11,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:11,296 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:11,297 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 20:25:11,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 20:25:11,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:11,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-15 20:25:11,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-09-15 20:25:11,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-09-15 20:25:11,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398003732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:11,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:11,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2024-09-15 20:25:11,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697886736] [2024-09-15 20:25:11,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:11,921 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 20:25:11,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:11,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 20:25:11,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-09-15 20:25:11,922 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand has 28 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-15 20:25:12,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:12,563 INFO L93 Difference]: Finished difference Result 219 states and 271 transitions. [2024-09-15 20:25:12,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 20:25:12,563 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 92 [2024-09-15 20:25:12,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:12,565 INFO L225 Difference]: With dead ends: 219 [2024-09-15 20:25:12,565 INFO L226 Difference]: Without dead ends: 218 [2024-09-15 20:25:12,565 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2024-09-15 20:25:12,566 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:12,566 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 405 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 20:25:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-15 20:25:12,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 198. [2024-09-15 20:25:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 134 states have internal predecessors, (146), 39 states have call successors, (39), 19 states have call predecessors, (39), 26 states have return successors, (56), 44 states have call predecessors, (56), 39 states have call successors, (56) [2024-09-15 20:25:12,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 241 transitions. [2024-09-15 20:25:12,571 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 241 transitions. Word has length 92 [2024-09-15 20:25:12,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:12,571 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 241 transitions. [2024-09-15 20:25:12,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-15 20:25:12,571 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 241 transitions. [2024-09-15 20:25:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-15 20:25:12,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:12,572 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:12,588 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 20:25:12,776 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:12,777 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:12,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:12,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2133555725, now seen corresponding path program 4 times [2024-09-15 20:25:12,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:12,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769129233] [2024-09-15 20:25:12,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:12,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-15 20:25:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-15 20:25:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-15 20:25:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 65 proven. 41 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-09-15 20:25:12,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:12,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769129233] [2024-09-15 20:25:12,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769129233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565553359] [2024-09-15 20:25:12,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 20:25:12,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:12,984 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:12,993 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 20:25:13,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 20:25:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:13,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 20:25:13,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:13,176 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 76 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-15 20:25:13,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 81 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-15 20:25:13,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565553359] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:13,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:13,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 17] total 25 [2024-09-15 20:25:13,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161756836] [2024-09-15 20:25:13,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:13,663 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 20:25:13,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:13,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 20:25:13,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-09-15 20:25:13,664 INFO L87 Difference]: Start difference. First operand 198 states and 241 transitions. Second operand has 25 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 14 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (17), 7 states have call predecessors, (17), 11 states have call successors, (17) [2024-09-15 20:25:14,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:14,085 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2024-09-15 20:25:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 20:25:14,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 14 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (17), 7 states have call predecessors, (17), 11 states have call successors, (17) Word has length 93 [2024-09-15 20:25:14,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:14,087 INFO L225 Difference]: With dead ends: 230 [2024-09-15 20:25:14,087 INFO L226 Difference]: Without dead ends: 216 [2024-09-15 20:25:14,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 20:25:14,088 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:14,088 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 288 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:25:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-09-15 20:25:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2024-09-15 20:25:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 134 states have (on average 1.1119402985074627) internal successors, (149), 133 states have internal predecessors, (149), 36 states have call successors, (36), 21 states have call predecessors, (36), 25 states have return successors, (46), 42 states have call predecessors, (46), 36 states have call successors, (46) [2024-09-15 20:25:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 231 transitions. [2024-09-15 20:25:14,094 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 231 transitions. Word has length 93 [2024-09-15 20:25:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:14,094 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 231 transitions. [2024-09-15 20:25:14,095 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 14 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (17), 7 states have call predecessors, (17), 11 states have call successors, (17) [2024-09-15 20:25:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 231 transitions. [2024-09-15 20:25:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-15 20:25:14,095 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:14,096 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2024-09-15 20:25:14,109 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-15 20:25:14,296 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:14,296 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:14,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1488981553, now seen corresponding path program 5 times [2024-09-15 20:25:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919449910] [2024-09-15 20:25:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-15 20:25:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-15 20:25:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:14,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-15 20:25:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 54 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2024-09-15 20:25:14,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:14,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919449910] [2024-09-15 20:25:14,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919449910] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:14,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466415972] [2024-09-15 20:25:14,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 20:25:14,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:14,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:14,632 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:14,634 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 20:25:14,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-15 20:25:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:14,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 20:25:14,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 129 proven. 67 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-09-15 20:25:14,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 101 proven. 80 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-09-15 20:25:15,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466415972] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:15,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:15,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 28 [2024-09-15 20:25:15,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044768827] [2024-09-15 20:25:15,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:15,333 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 20:25:15,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:15,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 20:25:15,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-09-15 20:25:15,334 INFO L87 Difference]: Start difference. First operand 197 states and 231 transitions. Second operand has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 24 states have internal predecessors, (80), 16 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2024-09-15 20:25:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:15,847 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2024-09-15 20:25:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 20:25:15,848 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 24 states have internal predecessors, (80), 16 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) Word has length 105 [2024-09-15 20:25:15,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:15,849 INFO L225 Difference]: With dead ends: 208 [2024-09-15 20:25:15,849 INFO L226 Difference]: Without dead ends: 208 [2024-09-15 20:25:15,853 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 214 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2024-09-15 20:25:15,854 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 112 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:15,855 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 213 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:25:15,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-09-15 20:25:15,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 188. [2024-09-15 20:25:15,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 129 states have (on average 1.0930232558139534) internal successors, (141), 129 states have internal predecessors, (141), 32 states have call successors, (32), 22 states have call predecessors, (32), 25 states have return successors, (40), 36 states have call predecessors, (40), 32 states have call successors, (40) [2024-09-15 20:25:15,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2024-09-15 20:25:15,868 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 105 [2024-09-15 20:25:15,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:15,868 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2024-09-15 20:25:15,869 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 24 states have internal predecessors, (80), 16 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2024-09-15 20:25:15,869 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2024-09-15 20:25:15,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-15 20:25:15,869 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:15,869 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-15 20:25:15,884 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-15 20:25:16,070 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:16,070 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:16,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:16,070 INFO L85 PathProgramCache]: Analyzing trace with hash -410047264, now seen corresponding path program 6 times [2024-09-15 20:25:16,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:16,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671001442] [2024-09-15 20:25:16,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:16,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-15 20:25:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 20:25:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 68 proven. 48 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-09-15 20:25:16,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671001442] [2024-09-15 20:25:16,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671001442] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:16,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700893644] [2024-09-15 20:25:16,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 20:25:16,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:16,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:16,399 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:16,400 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 20:25:16,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-15 20:25:16,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:16,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 20:25:16,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-09-15 20:25:16,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-09-15 20:25:16,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700893644] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:16,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:16,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 20 [2024-09-15 20:25:16,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334010914] [2024-09-15 20:25:16,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:16,766 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 20:25:16,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:16,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 20:25:16,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-09-15 20:25:16,767 INFO L87 Difference]: Start difference. First operand 188 states and 213 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 9 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-15 20:25:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:16,961 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2024-09-15 20:25:16,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 20:25:16,963 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 9 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 104 [2024-09-15 20:25:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:16,963 INFO L225 Difference]: With dead ends: 193 [2024-09-15 20:25:16,963 INFO L226 Difference]: Without dead ends: 191 [2024-09-15 20:25:16,964 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-09-15 20:25:16,964 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:16,964 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 187 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:25:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-15 20:25:16,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-09-15 20:25:16,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 129 states have (on average 1.0775193798449612) internal successors, (139), 129 states have internal predecessors, (139), 32 states have call successors, (32), 22 states have call predecessors, (32), 25 states have return successors, (39), 36 states have call predecessors, (39), 32 states have call successors, (39) [2024-09-15 20:25:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 210 transitions. [2024-09-15 20:25:16,968 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 210 transitions. Word has length 104 [2024-09-15 20:25:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:16,968 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 210 transitions. [2024-09-15 20:25:16,968 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 9 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-15 20:25:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 210 transitions. [2024-09-15 20:25:16,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-15 20:25:16,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:16,969 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-15 20:25:16,984 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-15 20:25:17,169 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-15 20:25:17,170 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:17,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:17,170 INFO L85 PathProgramCache]: Analyzing trace with hash -463797280, now seen corresponding path program 7 times [2024-09-15 20:25:17,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:17,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320005622] [2024-09-15 20:25:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:17,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:17,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-15 20:25:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:17,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:17,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 20:25:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-15 20:25:17,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:17,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320005622] [2024-09-15 20:25:17,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320005622] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:17,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754703167] [2024-09-15 20:25:17,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 20:25:17,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:17,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:17,799 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:17,800 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-15 20:25:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:17,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-15 20:25:17,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-15 20:25:18,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-15 20:25:18,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754703167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:18,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:18,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 36 [2024-09-15 20:25:18,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037529497] [2024-09-15 20:25:18,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:18,657 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-15 20:25:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-15 20:25:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 20:25:18,658 INFO L87 Difference]: Start difference. First operand 188 states and 210 transitions. Second operand has 37 states, 34 states have (on average 1.5) internal successors, (51), 22 states have internal predecessors, (51), 12 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (18), 18 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-15 20:25:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:19,098 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2024-09-15 20:25:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 20:25:19,099 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.5) internal successors, (51), 22 states have internal predecessors, (51), 12 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (18), 18 states have call predecessors, (18), 8 states have call successors, (18) Word has length 105 [2024-09-15 20:25:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:19,100 INFO L225 Difference]: With dead ends: 191 [2024-09-15 20:25:19,100 INFO L226 Difference]: Without dead ends: 191 [2024-09-15 20:25:19,100 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 20:25:19,101 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:19,101 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 551 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 20:25:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-15 20:25:19,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-09-15 20:25:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 129 states have (on average 1.069767441860465) internal successors, (138), 129 states have internal predecessors, (138), 32 states have call successors, (32), 22 states have call predecessors, (32), 25 states have return successors, (39), 36 states have call predecessors, (39), 32 states have call successors, (39) [2024-09-15 20:25:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 209 transitions. [2024-09-15 20:25:19,105 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 209 transitions. Word has length 105 [2024-09-15 20:25:19,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:19,106 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 209 transitions. [2024-09-15 20:25:19,106 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.5) internal successors, (51), 22 states have internal predecessors, (51), 12 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (18), 18 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-15 20:25:19,106 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 209 transitions. [2024-09-15 20:25:19,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-15 20:25:19,107 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:19,107 INFO L216 NwaCegarLoop]: trace histogram [12, 10, 10, 9, 8, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-15 20:25:19,123 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-15 20:25:19,311 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:19,312 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:19,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:19,313 INFO L85 PathProgramCache]: Analyzing trace with hash 525010234, now seen corresponding path program 8 times [2024-09-15 20:25:19,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:19,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626245712] [2024-09-15 20:25:19,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:19,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 20:25:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:19,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 20:25:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-15 20:25:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-15 20:25:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 124 proven. 37 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-09-15 20:25:19,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:19,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626245712] [2024-09-15 20:25:19,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626245712] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:19,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45717345] [2024-09-15 20:25:19,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:25:19,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:19,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:19,529 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:19,531 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-15 20:25:19,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 20:25:19,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:19,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 20:25:19,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:19,673 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 140 proven. 37 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2024-09-15 20:25:19,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 140 proven. 37 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2024-09-15 20:25:19,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45717345] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:19,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:19,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-15 20:25:19,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216495505] [2024-09-15 20:25:19,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:19,928 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 20:25:19,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:19,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 20:25:19,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-09-15 20:25:19,929 INFO L87 Difference]: Start difference. First operand 188 states and 209 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-15 20:25:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:20,116 INFO L93 Difference]: Finished difference Result 220 states and 232 transitions. [2024-09-15 20:25:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 20:25:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 134 [2024-09-15 20:25:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:20,117 INFO L225 Difference]: With dead ends: 220 [2024-09-15 20:25:20,117 INFO L226 Difference]: Without dead ends: 211 [2024-09-15 20:25:20,118 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 291 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-09-15 20:25:20,121 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 71 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:20,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 231 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:25:20,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-15 20:25:20,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 206. [2024-09-15 20:25:20,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 144 states have (on average 1.0555555555555556) internal successors, (152), 144 states have internal predecessors, (152), 31 states have call successors, (31), 27 states have call predecessors, (31), 29 states have return successors, (34), 34 states have call predecessors, (34), 31 states have call successors, (34) [2024-09-15 20:25:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 217 transitions. [2024-09-15 20:25:20,126 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 217 transitions. Word has length 134 [2024-09-15 20:25:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:20,126 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 217 transitions. [2024-09-15 20:25:20,126 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-15 20:25:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 217 transitions. [2024-09-15 20:25:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-09-15 20:25:20,127 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:20,127 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 10, 9, 9, 9, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1] [2024-09-15 20:25:20,148 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-15 20:25:20,334 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:20,334 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:20,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash -739295778, now seen corresponding path program 9 times [2024-09-15 20:25:20,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:20,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059018649] [2024-09-15 20:25:20,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:20,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 20:25:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:20,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 20:25:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:20,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-15 20:25:20,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-15 20:25:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 150 proven. 52 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-09-15 20:25:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059018649] [2024-09-15 20:25:20,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059018649] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:20,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248585211] [2024-09-15 20:25:20,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 20:25:20,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:20,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:20,593 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:20,595 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-15 20:25:20,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 20:25:20,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:20,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 20:25:20,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2024-09-15 20:25:20,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2024-09-15 20:25:20,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248585211] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:20,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:20,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 24 [2024-09-15 20:25:20,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265056603] [2024-09-15 20:25:20,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:20,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 20:25:20,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 20:25:20,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-09-15 20:25:20,989 INFO L87 Difference]: Start difference. First operand 206 states and 217 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 20 states have internal predecessors, (59), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-15 20:25:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:21,428 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2024-09-15 20:25:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 20:25:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 20 states have internal predecessors, (59), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) Word has length 146 [2024-09-15 20:25:21,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:21,429 INFO L225 Difference]: With dead ends: 204 [2024-09-15 20:25:21,429 INFO L226 Difference]: Without dead ends: 189 [2024-09-15 20:25:21,430 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 316 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=1385, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 20:25:21,430 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:21,431 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 323 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:25:21,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-09-15 20:25:21,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 184. [2024-09-15 20:25:21,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 128 states have (on average 1.046875) internal successors, (134), 129 states have internal predecessors, (134), 28 states have call successors, (28), 24 states have call predecessors, (28), 26 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2024-09-15 20:25:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2024-09-15 20:25:21,434 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 146 [2024-09-15 20:25:21,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:21,434 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2024-09-15 20:25:21,435 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 20 states have internal predecessors, (59), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-15 20:25:21,435 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2024-09-15 20:25:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-15 20:25:21,435 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:21,435 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 10, 10, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1] [2024-09-15 20:25:21,448 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-15 20:25:21,639 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-15 20:25:21,640 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:21,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:21,640 INFO L85 PathProgramCache]: Analyzing trace with hash 599930700, now seen corresponding path program 10 times [2024-09-15 20:25:21,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:21,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143750564] [2024-09-15 20:25:21,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:21,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 20:25:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 20:25:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-15 20:25:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:21,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2024-09-15 20:25:21,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 95 proven. 46 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-15 20:25:21,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143750564] [2024-09-15 20:25:21,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143750564] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865190736] [2024-09-15 20:25:21,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 20:25:21,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:21,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:21,844 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:21,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-15 20:25:21,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 20:25:21,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:21,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 20:25:21,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 113 proven. 190 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2024-09-15 20:25:22,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 113 proven. 198 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-09-15 20:25:22,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865190736] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:22,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:22,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 17] total 23 [2024-09-15 20:25:22,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834608512] [2024-09-15 20:25:22,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:22,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 20:25:22,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 20:25:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-09-15 20:25:22,769 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2024-09-15 20:25:22,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:22,994 INFO L93 Difference]: Finished difference Result 184 states and 191 transitions. [2024-09-15 20:25:22,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-15 20:25:22,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) Word has length 153 [2024-09-15 20:25:22,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:22,995 INFO L225 Difference]: With dead ends: 184 [2024-09-15 20:25:22,995 INFO L226 Difference]: Without dead ends: 184 [2024-09-15 20:25:22,995 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 324 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2024-09-15 20:25:22,996 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:22,996 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:25:22,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-15 20:25:22,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-09-15 20:25:22,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 128 states have (on average 1.0390625) internal successors, (133), 129 states have internal predecessors, (133), 28 states have call successors, (28), 24 states have call predecessors, (28), 26 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2024-09-15 20:25:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2024-09-15 20:25:22,999 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 153 [2024-09-15 20:25:23,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:23,000 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2024-09-15 20:25:23,000 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2024-09-15 20:25:23,000 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2024-09-15 20:25:23,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-09-15 20:25:23,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:23,001 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 2, 1, 1, 1] [2024-09-15 20:25:23,016 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-15 20:25:23,204 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-15 20:25:23,205 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:23,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:23,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1814789073, now seen corresponding path program 11 times [2024-09-15 20:25:23,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:23,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048750046] [2024-09-15 20:25:23,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:23,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 20:25:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 20:25:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-15 20:25:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2024-09-15 20:25:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:23,668 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2024-09-15 20:25:23,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:23,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048750046] [2024-09-15 20:25:23,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048750046] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:23,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618442777] [2024-09-15 20:25:23,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 20:25:23,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:23,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:23,674 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:23,678 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-15 20:25:23,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-15 20:25:23,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:23,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-15 20:25:23,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 151 proven. 250 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-15 20:25:24,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:26,858 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 141 proven. 274 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2024-09-15 20:25:26,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618442777] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:26,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:26,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 28] total 52 [2024-09-15 20:25:26,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628535334] [2024-09-15 20:25:26,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:26,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-15 20:25:26,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:26,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-15 20:25:26,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2572, Unknown=0, NotChecked=0, Total=2756 [2024-09-15 20:25:26,861 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand has 53 states, 49 states have (on average 2.142857142857143) internal successors, (105), 42 states have internal predecessors, (105), 26 states have call successors, (31), 4 states have call predecessors, (31), 16 states have return successors, (37), 24 states have call predecessors, (37), 24 states have call successors, (37) [2024-09-15 20:25:28,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:28,742 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2024-09-15 20:25:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-15 20:25:28,743 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 2.142857142857143) internal successors, (105), 42 states have internal predecessors, (105), 26 states have call successors, (31), 4 states have call predecessors, (31), 16 states have return successors, (37), 24 states have call predecessors, (37), 24 states have call successors, (37) Word has length 166 [2024-09-15 20:25:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:28,744 INFO L225 Difference]: With dead ends: 165 [2024-09-15 20:25:28,744 INFO L226 Difference]: Without dead ends: 165 [2024-09-15 20:25:28,745 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=566, Invalid=6744, Unknown=0, NotChecked=0, Total=7310 [2024-09-15 20:25:28,746 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 162 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:28,746 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 410 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-15 20:25:28,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-15 20:25:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-09-15 20:25:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 25 states have call successors, (25), 23 states have call predecessors, (25), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-15 20:25:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2024-09-15 20:25:28,750 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 166 [2024-09-15 20:25:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:28,751 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2024-09-15 20:25:28,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 2.142857142857143) internal successors, (105), 42 states have internal predecessors, (105), 26 states have call successors, (31), 4 states have call predecessors, (31), 16 states have return successors, (37), 24 states have call predecessors, (37), 24 states have call successors, (37) [2024-09-15 20:25:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2024-09-15 20:25:28,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-09-15 20:25:28,753 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:28,753 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:28,767 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-15 20:25:28,956 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-15 20:25:28,957 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:28,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:28,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1269067487, now seen corresponding path program 1 times [2024-09-15 20:25:28,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:28,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924949853] [2024-09-15 20:25:28,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:28,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:29,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-15 20:25:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:29,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:29,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:29,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 20:25:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:30,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-15 20:25:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:30,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:30,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:30,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 20:25:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 20:25:30,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 20:25:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2024-09-15 20:25:30,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:30,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924949853] [2024-09-15 20:25:30,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924949853] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:30,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143393481] [2024-09-15 20:25:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:30,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:30,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:30,490 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:30,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-15 20:25:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:30,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-15 20:25:30,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2024-09-15 20:25:30,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2024-09-15 20:25:31,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143393481] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:31,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:31,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2024-09-15 20:25:31,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030607515] [2024-09-15 20:25:31,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:31,466 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 20:25:31,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:31,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 20:25:31,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 20:25:31,469 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-15 20:25:31,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:31,769 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2024-09-15 20:25:31,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 20:25:31,770 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) Word has length 173 [2024-09-15 20:25:31,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:31,770 INFO L225 Difference]: With dead ends: 163 [2024-09-15 20:25:31,770 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 20:25:31,771 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 20:25:31,771 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:31,771 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 907 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:25:31,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 20:25:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 20:25:31,772 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) [2024-09-15 20:25:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 20:25:31,772 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2024-09-15 20:25:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:31,773 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 20:25:31,773 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-15 20:25:31,773 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 20:25:31,773 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 20:25:31,775 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-09-15 20:25:31,775 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fibo2Err0ENSURES_VIOLATIONPOST_CONDITION (1 of 3 remaining) [2024-09-15 20:25:31,776 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fibo1Err0ENSURES_VIOLATIONPOST_CONDITION (0 of 3 remaining) [2024-09-15 20:25:31,789 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-15 20:25:31,979 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-15 20:25:31,982 INFO L408 BasicCegarLoop]: Path program histogram: [11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:31,984 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 20:25:31,986 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 08:25:31 BoogieIcfgContainer [2024-09-15 20:25:31,987 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 20:25:31,987 INFO L158 Benchmark]: Toolchain (without parser) took 34643.26ms. Allocated memory was 86.0MB in the beginning and 524.3MB in the end (delta: 438.3MB). Free memory was 52.1MB in the beginning and 447.6MB in the end (delta: -395.4MB). Peak memory consumption was 45.6MB. Max. memory is 16.1GB. [2024-09-15 20:25:31,987 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 86.0MB. Free memory is still 66.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:31,987 INFO L158 Benchmark]: CDTParser took 0.71ms. Allocated memory is still 86.0MB. Free memory is still 64.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:31,987 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.83ms. Allocated memory is still 86.0MB. Free memory was 51.8MB in the beginning and 38.8MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-15 20:25:31,988 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.23ms. Allocated memory is still 86.0MB. Free memory was 38.8MB in the beginning and 37.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 20:25:31,988 INFO L158 Benchmark]: Boogie Preprocessor took 52.83ms. Allocated memory is still 86.0MB. Free memory was 37.5MB in the beginning and 65.3MB in the end (delta: -27.8MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. [2024-09-15 20:25:31,988 INFO L158 Benchmark]: RCFGBuilder took 297.68ms. Allocated memory is still 86.0MB. Free memory was 65.3MB in the beginning and 52.4MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-15 20:25:31,988 INFO L158 Benchmark]: TraceAbstraction took 34017.76ms. Allocated memory was 86.0MB in the beginning and 524.3MB in the end (delta: 438.3MB). Free memory was 51.6MB in the beginning and 447.6MB in the end (delta: -396.0MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. [2024-09-15 20:25:31,989 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 0.17ms. Allocated memory is still 86.0MB. Free memory is still 66.8MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.71ms. Allocated memory is still 86.0MB. Free memory is still 64.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.83ms. Allocated memory is still 86.0MB. Free memory was 51.8MB in the beginning and 38.8MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.23ms. Allocated memory is still 86.0MB. Free memory was 38.8MB in the beginning and 37.5MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.83ms. Allocated memory is still 86.0MB. Free memory was 37.5MB in the beginning and 65.3MB in the end (delta: -27.8MB). Peak memory consumption was 6.0MB. Max. memory is 16.1GB. * RCFGBuilder took 297.68ms. Allocated memory is still 86.0MB. Free memory was 65.3MB in the beginning and 52.4MB in the end (delta: 12.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 34017.76ms. Allocated memory was 86.0MB in the beginning and 524.3MB in the end (delta: 438.3MB). Free memory was 51.6MB in the beginning and 447.6MB in the end (delta: -396.0MB). Peak memory consumption was 43.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 19]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - PositiveResult [Line: 9]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 34.0s, OverallIterations: 28, TraceHistogramMax: 13, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 8.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1664 SdHoareTripleChecker+Valid, 5.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1586 mSDsluCounter, 7244 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6526 mSDsCounter, 903 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12742 IncrementalHoareTripleChecker+Invalid, 13645 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 903 mSolverCounterUnsat, 718 mSDtfsCounter, 12742 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4474 GetRequests, 3659 SyntacticMatches, 116 SemanticMatches, 699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4917 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=24, InterpolantAutomatonStates: 495, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 28 MinimizatonAttempts, 192 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 18.7s InterpolantComputationTime, 3601 NumberOfCodeBlocks, 3336 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 5266 ConstructedInterpolants, 0 QuantifiedInterpolants, 12485 SizeOfPredicates, 84 NumberOfNonLiveVariables, 3738 ConjunctsInSsa, 499 ConjunctsInUnsatCore, 69 InterpolantComputations, 8 PerfectInterpolantSequences, 11612/15329 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-15 20:25:32,021 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...