This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:45:19,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:45:19,076 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:45:19,080 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:45:19,082 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:45:19,107 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:45:19,109 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:45:19,109 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:45:19,110 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:45:19,113 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:45:19,114 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:45:19,114 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:45:19,114 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:45:19,115 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:45:19,115 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:45:19,115 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:45:19,115 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:45:19,117 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:45:19,117 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:45:19,117 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:45:19,118 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:45:19,118 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:45:19,118 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:45:19,118 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:45:19,119 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:45:19,119 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:45:19,119 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:45:19,119 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:45:19,120 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:45:19,120 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:45:19,120 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:45:19,120 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:45:19,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:45:19,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:45:19,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:45:19,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:45:19,122 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:45:19,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:45:19,123 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:45:19,123 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:45:19,124 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:45:19,124 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:45:19,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-20 13:45:19,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:45:19,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:45:19,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:45:19,369 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:45:19,369 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:45:19,371 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/Ackermann04.c [2024-09-20 13:45:20,739 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:45:20,887 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:45:20,887 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann04.c [2024-09-20 13:45:20,895 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/82a72d63f/8ace0de1e3f84cd8a33e64222422f293/FLAG4b928324c [2024-09-20 13:45:20,907 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/82a72d63f/8ace0de1e3f84cd8a33e64222422f293 [2024-09-20 13:45:20,909 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-20 13:45:20,913 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-20 13:45:20,913 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann04.yml/witness-2.1.yml [2024-09-20 13:45:20,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:45:20,950 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-20 13:45:20,951 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:45:20,952 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:45:20,955 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:45:20,956 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:45:20" (1/2) ... [2024-09-20 13:45:20,957 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277016c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:20, skipping insertion in model container [2024-09-20 13:45:20,957 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:45:20" (1/2) ... [2024-09-20 13:45:20,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3c622c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:20, skipping insertion in model container [2024-09-20 13:45:20,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:45:20" (2/2) ... [2024-09-20 13:45:20,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277016c and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:20, skipping insertion in model container [2024-09-20 13:45:20,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:45:20" (2/2) ... [2024-09-20 13:45:20,963 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-20 13:45:20,963 INFO L1541 ArrayList]: Function contract at [L16]: requires null, ensures (((\old(n) < \result) || (\old(m) != 0)) && ((0 < \old(m)) || (\old(m) == 0))) [2024-09-20 13:45:20,977 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:45:21,095 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/Ackermann04.c[1166,1179] [2024-09-20 13:45:21,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:45:21,117 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-20 13:45:21,153 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/Ackermann04.c[1166,1179] [2024-09-20 13:45:21,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:45:21,170 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:45:21,171 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21 WrapperNode [2024-09-20 13:45:21,171 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:45:21,173 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:45:21,173 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:45:21,173 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:45:21,179 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,185 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,197 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-09-20 13:45:21,198 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:45:21,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:45:21,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:45:21,199 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:45:21,207 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,209 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,216 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure ackermann is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-20 13:45:21,216 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,219 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,220 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,221 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,222 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,223 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:45:21,224 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:45:21,224 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:45:21,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:45:21,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:45:21,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:21,250 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) [2024-09-20 13:45:21,253 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 [2024-09-20 13:45:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:45:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:45:21,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:45:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-09-20 13:45:21,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-09-20 13:45:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-20 13:45:21,338 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:45:21,340 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:45:21,436 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-20 13:45:21,437 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:45:21,454 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:45:21,455 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 13:45:21,455 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:45:21 BoogieIcfgContainer [2024-09-20 13:45:21,455 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:45:21,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:45:21,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:45:21,483 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:45:21,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:45:20" (1/4) ... [2024-09-20 13:45:21,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@761869e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:45:21, skipping insertion in model container [2024-09-20 13:45:21,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:45:20" (2/4) ... [2024-09-20 13:45:21,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@761869e9 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.09 01:45:21, skipping insertion in model container [2024-09-20 13:45:21,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:21" (3/4) ... [2024-09-20 13:45:21,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@761869e9 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.09 01:45:21, skipping insertion in model container [2024-09-20 13:45:21,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:45:21" (4/4) ... [2024-09-20 13:45:21,491 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2024-09-20 13:45:21,534 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:45:21,534 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-20 13:45:21,571 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:45:21,576 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;@4225e3c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:45:21,576 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-20 13:45:21,578 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 13:45:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-09-20 13:45:21,583 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:21,584 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:21,584 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:21,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:21,588 INFO L85 PathProgramCache]: Analyzing trace with hash -26348941, now seen corresponding path program 1 times [2024-09-20 13:45:21,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:21,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506790715] [2024-09-20 13:45:21,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:21,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:21,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:21,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506790715] [2024-09-20 13:45:21,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506790715] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:21,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:21,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:45:21,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74559199] [2024-09-20 13:45:21,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:21,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 13:45:21,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 13:45:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:45:21,930 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:22,038 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-20 13:45:22,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 13:45:22,044 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-09-20 13:45:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:22,052 INFO L225 Difference]: With dead ends: 39 [2024-09-20 13:45:22,052 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 13:45:22,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:45:22,056 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:22,056 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 13:45:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2024-09-20 13:45:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 13:45:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-09-20 13:45:22,096 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 7 [2024-09-20 13:45:22,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:22,097 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-09-20 13:45:22,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:22,098 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-09-20 13:45:22,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 13:45:22,099 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:22,100 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:22,100 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:45:22,100 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:22,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:22,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1506041859, now seen corresponding path program 1 times [2024-09-20 13:45:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:22,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558893066] [2024-09-20 13:45:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:22,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:22,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558893066] [2024-09-20 13:45:22,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558893066] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:22,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:22,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 13:45:22,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163039722] [2024-09-20 13:45:22,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:22,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:45:22,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:22,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:45:22,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:22,260 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (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) [2024-09-20 13:45:22,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:22,322 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-09-20 13:45:22,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:45:22,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (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 11 [2024-09-20 13:45:22,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:22,325 INFO L225 Difference]: With dead ends: 42 [2024-09-20 13:45:22,325 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 13:45:22,326 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:22,327 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:22,328 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:22,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 13:45:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-09-20 13:45:22,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 13:45:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-09-20 13:45:22,343 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 11 [2024-09-20 13:45:22,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:22,343 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-09-20 13:45:22,343 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (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) [2024-09-20 13:45:22,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-09-20 13:45:22,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 13:45:22,344 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:22,344 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:22,344 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 13:45:22,344 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:22,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:22,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1508872004, now seen corresponding path program 1 times [2024-09-20 13:45:22,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:22,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406736888] [2024-09-20 13:45:22,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:22,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:45:22,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:22,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406736888] [2024-09-20 13:45:22,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406736888] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:22,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:22,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 13:45:22,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068074653] [2024-09-20 13:45:22,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:22,498 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 13:45:22,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:22,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 13:45:22,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 13:45:22,503 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-09-20 13:45:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:22,606 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2024-09-20 13:45:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 13:45:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 11 [2024-09-20 13:45:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:22,607 INFO L225 Difference]: With dead ends: 47 [2024-09-20 13:45:22,608 INFO L226 Difference]: Without dead ends: 47 [2024-09-20 13:45:22,608 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 [2024-09-20 13:45:22,609 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:22,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:22,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-20 13:45:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-09-20 13:45:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-20 13:45:22,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2024-09-20 13:45:22,621 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 11 [2024-09-20 13:45:22,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:22,621 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2024-09-20 13:45:22,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-09-20 13:45:22,621 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2024-09-20 13:45:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 13:45:22,622 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:22,622 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:22,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 13:45:22,622 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:22,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:22,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1484759222, now seen corresponding path program 1 times [2024-09-20 13:45:22,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:22,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262272953] [2024-09-20 13:45:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:22,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:22,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:22,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262272953] [2024-09-20 13:45:22,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262272953] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:22,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:22,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:45:22,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625030449] [2024-09-20 13:45:22,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:22,733 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:45:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:22,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:45:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:22,734 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:22,780 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2024-09-20 13:45:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:45:22,782 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-20 13:45:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:22,783 INFO L225 Difference]: With dead ends: 61 [2024-09-20 13:45:22,784 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 13:45:22,784 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:22,785 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:22,786 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:45:22,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 13:45:22,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2024-09-20 13:45:22,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-20 13:45:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 80 transitions. [2024-09-20 13:45:22,796 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 80 transitions. Word has length 11 [2024-09-20 13:45:22,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:22,796 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 80 transitions. [2024-09-20 13:45:22,796 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 80 transitions. [2024-09-20 13:45:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 13:45:22,797 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:22,797 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:22,797 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 13:45:22,798 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:22,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:22,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1264662995, now seen corresponding path program 1 times [2024-09-20 13:45:22,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:22,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514350525] [2024-09-20 13:45:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:22,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:45:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:45:22,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:22,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514350525] [2024-09-20 13:45:22,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514350525] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:22,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132156190] [2024-09-20 13:45:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:22,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:22,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:22,866 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) [2024-09-20 13:45:22,867 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:45:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-20 13:45:22,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 13:45:22,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:45:22,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132156190] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:22,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:45:22,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-09-20 13:45:22,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903082514] [2024-09-20 13:45:22,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:22,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:45:22,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:22,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:45:22,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-20 13:45:22,992 INFO L87 Difference]: Start difference. First operand 51 states and 80 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:23,044 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2024-09-20 13:45:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 13:45:23,044 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-20 13:45:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:23,046 INFO L225 Difference]: With dead ends: 58 [2024-09-20 13:45:23,046 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 13:45:23,046 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-09-20 13:45:23,047 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:23,047 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:45:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 13:45:23,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2024-09-20 13:45:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-20 13:45:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 65 transitions. [2024-09-20 13:45:23,065 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 65 transitions. Word has length 14 [2024-09-20 13:45:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:23,066 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 65 transitions. [2024-09-20 13:45:23,066 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:23,066 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 65 transitions. [2024-09-20 13:45:23,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 13:45:23,067 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:23,067 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:23,081 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 13:45:23,267 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:23,267 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:23,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -507496426, now seen corresponding path program 1 times [2024-09-20 13:45:23,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:23,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868639684] [2024-09-20 13:45:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:23,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:23,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:23,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:23,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:45:23,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:23,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868639684] [2024-09-20 13:45:23,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868639684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:23,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95071460] [2024-09-20 13:45:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:23,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:23,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:23,345 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) [2024-09-20 13:45:23,348 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:45:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:23,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 13:45:23,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:45:23,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:45:23,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95071460] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:23,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:23,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-09-20 13:45:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006556669] [2024-09-20 13:45:23,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:23,514 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 13:45:23,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 13:45:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-20 13:45:23,514 INFO L87 Difference]: Start difference. First operand 44 states and 65 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 13:45:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:23,622 INFO L93 Difference]: Finished difference Result 62 states and 102 transitions. [2024-09-20 13:45:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:45:23,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 18 [2024-09-20 13:45:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:23,626 INFO L225 Difference]: With dead ends: 62 [2024-09-20 13:45:23,626 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 13:45:23,627 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-20 13:45:23,627 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:23,627 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 56 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 13:45:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-09-20 13:45:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2024-09-20 13:45:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2024-09-20 13:45:23,633 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 18 [2024-09-20 13:45:23,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:23,633 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2024-09-20 13:45:23,633 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 13:45:23,633 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2024-09-20 13:45:23,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 13:45:23,634 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:23,634 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:23,647 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 13:45:23,835 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 13:45:23,835 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:23,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:23,836 INFO L85 PathProgramCache]: Analyzing trace with hash -506552652, now seen corresponding path program 1 times [2024-09-20 13:45:23,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:23,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863281523] [2024-09-20 13:45:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:23,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:23,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:23,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:24,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:24,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:24,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:24,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:24,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 13:45:24,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:24,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863281523] [2024-09-20 13:45:24,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863281523] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:24,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730049178] [2024-09-20 13:45:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:24,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:24,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:24,166 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) [2024-09-20 13:45:24,170 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:45:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:24,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 13:45:24,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-20 13:45:24,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 13:45:24,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730049178] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:24,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:24,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2024-09-20 13:45:24,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180472961] [2024-09-20 13:45:24,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:24,869 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 13:45:24,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:24,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 13:45:24,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:45:24,870 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 13:45:24,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:24,994 INFO L93 Difference]: Finished difference Result 76 states and 108 transitions. [2024-09-20 13:45:24,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 13:45:24,997 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2024-09-20 13:45:24,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:24,999 INFO L225 Difference]: With dead ends: 76 [2024-09-20 13:45:24,999 INFO L226 Difference]: Without dead ends: 58 [2024-09-20 13:45:24,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:45:24,999 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:25,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 59 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:25,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-20 13:45:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-09-20 13:45:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2024-09-20 13:45:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-09-20 13:45:25,011 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 44 [2024-09-20 13:45:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:25,012 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-09-20 13:45:25,012 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 13:45:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-09-20 13:45:25,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-20 13:45:25,016 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:25,016 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:25,033 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 13:45:25,220 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 13:45:25,222 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:25,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:25,226 INFO L85 PathProgramCache]: Analyzing trace with hash 320389373, now seen corresponding path program 2 times [2024-09-20 13:45:25,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:25,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619863852] [2024-09-20 13:45:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:25,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:45:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:25,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-20 13:45:25,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 114 proven. 279 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-20 13:45:25,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:25,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619863852] [2024-09-20 13:45:25,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619863852] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:25,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272423233] [2024-09-20 13:45:25,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:45:25,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:25,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:25,997 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) [2024-09-20 13:45:26,019 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:45:26,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:45:26,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:26,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 13:45:26,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-20 13:45:26,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2024-09-20 13:45:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272423233] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:27,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:27,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 32 [2024-09-20 13:45:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469826877] [2024-09-20 13:45:27,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:27,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 13:45:27,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 13:45:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2024-09-20 13:45:27,643 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2024-09-20 13:45:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:28,324 INFO L93 Difference]: Finished difference Result 94 states and 135 transitions. [2024-09-20 13:45:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 13:45:28,325 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) Word has length 118 [2024-09-20 13:45:28,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:28,327 INFO L225 Difference]: With dead ends: 94 [2024-09-20 13:45:28,327 INFO L226 Difference]: Without dead ends: 94 [2024-09-20 13:45:28,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 13:45:28,328 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:28,328 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 102 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:45:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-20 13:45:28,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2024-09-20 13:45:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 16 states have call successors, (16), 7 states have call predecessors, (16), 11 states have return successors, (41), 18 states have call predecessors, (41), 16 states have call successors, (41) [2024-09-20 13:45:28,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 116 transitions. [2024-09-20 13:45:28,336 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 116 transitions. Word has length 118 [2024-09-20 13:45:28,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:28,336 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 116 transitions. [2024-09-20 13:45:28,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2024-09-20 13:45:28,336 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 116 transitions. [2024-09-20 13:45:28,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-20 13:45:28,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:28,338 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:28,351 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:45:28,542 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:28,542 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:28,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:28,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1065367807, now seen corresponding path program 3 times [2024-09-20 13:45:28,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:28,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957878363] [2024-09-20 13:45:28,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:28,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:28,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:28,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:28,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:28,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:28,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:28,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:28,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:29,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:29,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:45:29,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:29,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-20 13:45:29,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 148 proven. 171 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-09-20 13:45:29,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957878363] [2024-09-20 13:45:29,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957878363] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:29,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503993841] [2024-09-20 13:45:29,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:45:29,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:29,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:29,185 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) [2024-09-20 13:45:29,187 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:45:29,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-20 13:45:29,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:29,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 13:45:29,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 190 proven. 71 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-20 13:45:29,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 208 proven. 61 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2024-09-20 13:45:30,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503993841] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:30,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:30,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 15] total 28 [2024-09-20 13:45:30,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570862760] [2024-09-20 13:45:30,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:30,324 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 13:45:30,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:30,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 13:45:30,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-09-20 13:45:30,329 INFO L87 Difference]: Start difference. First operand 81 states and 116 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 23 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (24), 14 states have call predecessors, (24), 11 states have call successors, (24) [2024-09-20 13:45:30,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:30,821 INFO L93 Difference]: Finished difference Result 102 states and 146 transitions. [2024-09-20 13:45:30,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 13:45:30,826 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 23 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (24), 14 states have call predecessors, (24), 11 states have call successors, (24) Word has length 104 [2024-09-20 13:45:30,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:30,827 INFO L225 Difference]: With dead ends: 102 [2024-09-20 13:45:30,827 INFO L226 Difference]: Without dead ends: 99 [2024-09-20 13:45:30,828 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 13:45:30,828 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:30,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 104 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:45:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-20 13:45:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-20 13:45:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 19 states have call successors, (19), 8 states have call predecessors, (19), 14 states have return successors, (49), 24 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-20 13:45:30,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 139 transitions. [2024-09-20 13:45:30,847 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 139 transitions. Word has length 104 [2024-09-20 13:45:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:30,848 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 139 transitions. [2024-09-20 13:45:30,848 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 23 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (24), 14 states have call predecessors, (24), 11 states have call successors, (24) [2024-09-20 13:45:30,848 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 139 transitions. [2024-09-20 13:45:30,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-09-20 13:45:30,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:30,857 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:30,870 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 13:45:31,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:31,058 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:31,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:31,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1993615657, now seen corresponding path program 4 times [2024-09-20 13:45:31,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331405244] [2024-09-20 13:45:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:31,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:45:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-20 13:45:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:31,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 139 proven. 307 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2024-09-20 13:45:31,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:31,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331405244] [2024-09-20 13:45:31,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331405244] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:31,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529791261] [2024-09-20 13:45:31,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:45:31,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:31,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:31,896 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) [2024-09-20 13:45:31,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:45:31,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:45:31,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:31,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 13:45:31,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-20 13:45:32,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-20 13:45:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529791261] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:33,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:33,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2024-09-20 13:45:33,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783958515] [2024-09-20 13:45:33,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:33,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 13:45:33,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:33,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 13:45:33,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-09-20 13:45:33,455 INFO L87 Difference]: Start difference. First operand 99 states and 139 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 21 states have internal predecessors, (69), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2024-09-20 13:45:33,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:33,835 INFO L93 Difference]: Finished difference Result 121 states and 175 transitions. [2024-09-20 13:45:33,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 13:45:33,836 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 21 states have internal predecessors, (69), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) Word has length 130 [2024-09-20 13:45:33,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:33,837 INFO L225 Difference]: With dead ends: 121 [2024-09-20 13:45:33,837 INFO L226 Difference]: Without dead ends: 121 [2024-09-20 13:45:33,838 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 282 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 13:45:33,838 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:33,838 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 102 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:45:33,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-20 13:45:33,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2024-09-20 13:45:33,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 75 states have internal predecessors, (80), 22 states have call successors, (22), 8 states have call predecessors, (22), 17 states have return successors, (62), 30 states have call predecessors, (62), 22 states have call successors, (62) [2024-09-20 13:45:33,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 164 transitions. [2024-09-20 13:45:33,846 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 164 transitions. Word has length 130 [2024-09-20 13:45:33,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:33,846 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 164 transitions. [2024-09-20 13:45:33,846 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 21 states have internal predecessors, (69), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2024-09-20 13:45:33,846 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 164 transitions. [2024-09-20 13:45:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-20 13:45:33,847 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:33,847 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:33,860 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 13:45:34,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 13:45:34,052 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:34,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:34,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1800834689, now seen corresponding path program 5 times [2024-09-20 13:45:34,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:34,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407343781] [2024-09-20 13:45:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:45:34,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:45:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 13:45:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:34,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:45:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 308 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2024-09-20 13:45:34,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:34,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407343781] [2024-09-20 13:45:34,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407343781] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:34,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775767062] [2024-09-20 13:45:34,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:45:34,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:34,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:34,974 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) [2024-09-20 13:45:34,977 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:45:35,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-20 13:45:35,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:35,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 13:45:35,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2024-09-20 13:45:35,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2024-09-20 13:45:38,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775767062] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:38,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:38,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2024-09-20 13:45:38,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938944651] [2024-09-20 13:45:38,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:38,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 13:45:38,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:38,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 13:45:38,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 13:45:38,490 INFO L87 Difference]: Start difference. First operand 114 states and 164 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-20 13:45:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:39,098 INFO L93 Difference]: Finished difference Result 143 states and 219 transitions. [2024-09-20 13:45:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-20 13:45:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) Word has length 156 [2024-09-20 13:45:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:39,101 INFO L225 Difference]: With dead ends: 143 [2024-09-20 13:45:39,101 INFO L226 Difference]: Without dead ends: 143 [2024-09-20 13:45:39,103 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 335 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=752, Invalid=3408, Unknown=0, NotChecked=0, Total=4160 [2024-09-20 13:45:39,103 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:39,104 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 120 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:45:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-20 13:45:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2024-09-20 13:45:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.072289156626506) internal successors, (89), 84 states have internal predecessors, (89), 25 states have call successors, (25), 8 states have call predecessors, (25), 20 states have return successors, (83), 36 states have call predecessors, (83), 25 states have call successors, (83) [2024-09-20 13:45:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 197 transitions. [2024-09-20 13:45:39,122 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 197 transitions. Word has length 156 [2024-09-20 13:45:39,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:39,123 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 197 transitions. [2024-09-20 13:45:39,123 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-20 13:45:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 197 transitions. [2024-09-20 13:45:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-09-20 13:45:39,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:39,124 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:39,152 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 13:45:39,325 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:39,325 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:39,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:39,326 INFO L85 PathProgramCache]: Analyzing trace with hash -707320168, now seen corresponding path program 6 times [2024-09-20 13:45:39,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:39,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250364288] [2024-09-20 13:45:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:39,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:45:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:40,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:40,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:45:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 13:45:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:40,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:45:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:45:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 400 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-09-20 13:45:40,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:40,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250364288] [2024-09-20 13:45:40,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250364288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:40,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358685796] [2024-09-20 13:45:40,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:45:40,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:40,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:40,504 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) [2024-09-20 13:45:40,506 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:45:40,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-09-20 13:45:40,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:40,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 13:45:40,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2024-09-20 13:45:40,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2024-09-20 13:45:44,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358685796] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:44,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:44,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 28] total 35 [2024-09-20 13:45:44,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382523022] [2024-09-20 13:45:44,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:44,283 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 13:45:44,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:44,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 13:45:44,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 13:45:44,284 INFO L87 Difference]: Start difference. First operand 129 states and 197 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2024-09-20 13:45:44,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:44,959 INFO L93 Difference]: Finished difference Result 165 states and 263 transitions. [2024-09-20 13:45:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-20 13:45:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) Word has length 169 [2024-09-20 13:45:44,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:44,961 INFO L225 Difference]: With dead ends: 165 [2024-09-20 13:45:44,961 INFO L226 Difference]: Without dead ends: 165 [2024-09-20 13:45:44,962 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 364 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=3340, Unknown=0, NotChecked=0, Total=4160 [2024-09-20 13:45:44,962 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:44,963 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 124 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:45:44,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-20 13:45:44,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2024-09-20 13:45:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 92 states have (on average 1.065217391304348) internal successors, (98), 93 states have internal predecessors, (98), 28 states have call successors, (28), 8 states have call predecessors, (28), 23 states have return successors, (104), 42 states have call predecessors, (104), 28 states have call successors, (104) [2024-09-20 13:45:44,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 230 transitions. [2024-09-20 13:45:44,972 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 230 transitions. Word has length 169 [2024-09-20 13:45:44,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:44,972 INFO L474 AbstractCegarLoop]: Abstraction has 144 states and 230 transitions. [2024-09-20 13:45:44,972 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2024-09-20 13:45:44,972 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 230 transitions. [2024-09-20 13:45:44,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-20 13:45:44,974 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:44,974 INFO L216 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:44,987 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 13:45:45,178 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:45,179 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:45,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:45,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1950095843, now seen corresponding path program 7 times [2024-09-20 13:45:45,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:45,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125620407] [2024-09-20 13:45:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:45,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:45:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:45:45,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 13:45:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:45,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:46,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:46,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:46,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:46,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:46,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:46,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:45:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:46,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:45:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:46,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:45:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2024-09-20 13:45:46,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:46,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125620407] [2024-09-20 13:45:46,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125620407] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:46,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850104482] [2024-09-20 13:45:46,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:45:46,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:46,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:46,116 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) [2024-09-20 13:45:46,117 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:45:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:46,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 13:45:46,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2024-09-20 13:45:46,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2024-09-20 13:45:51,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850104482] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:51,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:51,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 33] total 37 [2024-09-20 13:45:51,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450464992] [2024-09-20 13:45:51,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:51,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 13:45:51,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:51,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 13:45:51,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 13:45:51,910 INFO L87 Difference]: Start difference. First operand 144 states and 230 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 30 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-20 13:45:52,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:52,978 INFO L93 Difference]: Finished difference Result 160 states and 252 transitions. [2024-09-20 13:45:52,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-20 13:45:52,978 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 30 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 182 [2024-09-20 13:45:52,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:52,979 INFO L225 Difference]: With dead ends: 160 [2024-09-20 13:45:52,979 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 13:45:52,980 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 396 SyntacticMatches, 20 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=3790, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 13:45:52,982 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:52,982 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 72 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:45:52,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 13:45:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 13:45:52,983 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) [2024-09-20 13:45:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 13:45:52,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 182 [2024-09-20 13:45:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:52,983 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 13:45:52,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 30 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-20 13:45:52,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 13:45:52,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 13:45:52,986 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-20 13:45:52,986 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ackermannErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-20 13:45:53,000 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 13:45:53,190 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 13:45:53,193 INFO L408 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:53,195 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 13:45:53,196 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:45:53 BoogieIcfgContainer [2024-09-20 13:45:53,197 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 13:45:53,198 INFO L158 Benchmark]: Toolchain (without parser) took 32247.69ms. Allocated memory was 209.7MB in the beginning and 715.1MB in the end (delta: 505.4MB). Free memory was 138.8MB in the beginning and 330.6MB in the end (delta: -191.8MB). Peak memory consumption was 316.3MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,198 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 209.7MB. Free memory is still 169.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:45:53,198 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 209.7MB. Free memory was 140.9MB in the beginning and 140.6MB in the end (delta: 244.7kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:45:53,198 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.41ms. Allocated memory is still 209.7MB. Free memory was 138.6MB in the beginning and 125.8MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,198 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.29ms. Allocated memory is still 209.7MB. Free memory was 125.8MB in the beginning and 124.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,199 INFO L158 Benchmark]: Boogie Preprocessor took 24.42ms. Allocated memory is still 209.7MB. Free memory was 124.3MB in the beginning and 122.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,199 INFO L158 Benchmark]: RCFGBuilder took 231.66ms. Allocated memory is still 209.7MB. Free memory was 122.8MB in the beginning and 110.7MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,199 INFO L158 Benchmark]: TraceAbstraction took 31717.36ms. Allocated memory was 209.7MB in the beginning and 715.1MB in the end (delta: 505.4MB). Free memory was 178.9MB in the beginning and 330.6MB in the end (delta: -151.7MB). Peak memory consumption was 354.8MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,200 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 209.7MB. Free memory is still 169.6MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 209.7MB. Free memory was 140.9MB in the beginning and 140.6MB in the end (delta: 244.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 220.41ms. Allocated memory is still 209.7MB. Free memory was 138.6MB in the beginning and 125.8MB in the end (delta: 12.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.29ms. Allocated memory is still 209.7MB. Free memory was 125.8MB in the beginning and 124.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 24.42ms. Allocated memory is still 209.7MB. Free memory was 124.3MB in the beginning and 122.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 231.66ms. Allocated memory is still 209.7MB. Free memory was 122.8MB in the beginning and 110.7MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 31717.36ms. Allocated memory was 209.7MB in the beginning and 715.1MB in the end (delta: 505.4MB). Free memory was 178.9MB in the beginning and 330.6MB in the end (delta: -151.7MB). Peak memory consumption was 354.8MB. 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: 45]: 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: 16]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 31.6s, OverallIterations: 13, TraceHistogramMax: 27, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 478 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 449 mSDsluCounter, 946 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 738 mSDsCounter, 547 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4287 IncrementalHoareTripleChecker+Invalid, 4834 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 547 mSolverCounterUnsat, 208 mSDtfsCounter, 4287 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2454 GetRequests, 2002 SyntacticMatches, 75 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4103 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=12, InterpolantAutomatonStates: 221, 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, 13 MinimizatonAttempts, 95 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 23.6s InterpolantComputationTime, 1910 NumberOfCodeBlocks, 1857 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2801 ConstructedInterpolants, 0 QuantifiedInterpolants, 5671 SizeOfPredicates, 28 NumberOfNonLiveVariables, 2870 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 30 InterpolantComputations, 5 PerfectInterpolantSequences, 15744/19669 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-20 13:45:53,222 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...