This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 10:27:32,905 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:27:32,983 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:27:32,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:27:32,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:27:33,023 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:27:33,024 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:27:33,025 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:27:33,025 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:27:33,026 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:27:33,026 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:27:33,026 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:27:33,027 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:27:33,027 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:27:33,028 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:27:33,028 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:27:33,029 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:27:33,029 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:27:33,029 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:27:33,030 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:27:33,035 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:27:33,036 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:27:33,036 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:27:33,036 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:27:33,037 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:27:33,037 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:27:33,037 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:27:33,037 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:27:33,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:27:33,038 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:27:33,038 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:27:33,038 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:27:33,038 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:33,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:27:33,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:27:33,040 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:27:33,040 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:27:33,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:27:33,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:27:33,041 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:27:33,041 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:27:33,043 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:27:33,043 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 10:27:33,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:27:33,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:27:33,314 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:27:33,315 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:27:33,316 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:27:33,317 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/recHanoi03-2.c [2024-09-13 10:27:34,793 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:27:34,960 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:27:34,961 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/recHanoi03-2.c [2024-09-13 10:27:34,966 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/867f2d1f9/ffcbb993542948679b60762659a4aa2a/FLAG4d236ac9f [2024-09-13 10:27:34,978 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/867f2d1f9/ffcbb993542948679b60762659a4aa2a [2024-09-13 10:27:34,982 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 10:27:34,982 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 10:27:34,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/recHanoi03-2.yml/witness-2.1.yml [2024-09-13 10:27:35,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:27:35,030 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 10:27:35,033 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:35,033 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:27:35,038 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:27:35,039 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:34" (1/2) ... [2024-09-13 10:27:35,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103e5d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:35, skipping insertion in model container [2024-09-13 10:27:35,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:34" (1/2) ... [2024-09-13 10:27:35,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@31151bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:35, skipping insertion in model container [2024-09-13 10:27:35,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:27:35" (2/2) ... [2024-09-13 10:27:35,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@103e5d31 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:35, skipping insertion in model container [2024-09-13 10:27:35,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:27:35" (2/2) ... [2024-09-13 10:27:35,049 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 10:27:35,049 INFO L1541 ArrayList]: Function contract at [L18]: requires null, ensures (((((((3 <= \result) && (\old(n) <= 2)) || (126 < \result)) || ((((long long) \old(n) + 11) <= \result) && (31 <= \result))) || ((\result == 1) && (\old(n) == 1))) || ((7 <= \result) && (\old(n) <= 3))) || ((15 <= \result) && (\old(n) <= 4))) [2024-09-13 10:27:35,068 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:27:35,224 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2024-09-13 10:27:35,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:35,237 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 10:27:35,276 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/recHanoi03-2.c[769,782] [2024-09-13 10:27:35,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:35,319 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:27:35,319 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:35 WrapperNode [2024-09-13 10:27:35,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:35,320 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:35,321 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:27:35,321 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:27:35,327 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,333 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,356 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2024-09-13 10:27:35,356 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:35,357 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:27:35,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:27:35,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:27:35,368 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,368 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,373 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,384 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure hanoi is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-13 10:27:35,385 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,385 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,389 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,391 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,392 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,396 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:27:35,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:27:35,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:27:35,399 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:27:35,400 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 13.09 10:27:35" (1/1) ... [2024-09-13 10:27:35,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:35,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:35,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 10:27:35,436 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 10:27:35,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:27:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2024-09-13 10:27:35,484 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2024-09-13 10:27:35,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:27:35,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:27:35,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 10:27:35,546 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:27:35,549 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:27:35,700 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-13 10:27:35,700 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:27:35,732 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:27:35,732 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 10:27:35,732 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:27:35 BoogieIcfgContainer [2024-09-13 10:27:35,733 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:27:35,735 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:27:35,735 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:27:35,739 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:27:35,740 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:27:34" (1/4) ... [2024-09-13 10:27:35,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfb9efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:27:35, skipping insertion in model container [2024-09-13 10:27:35,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:27:35" (2/4) ... [2024-09-13 10:27:35,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfb9efa and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:27:35, skipping insertion in model container [2024-09-13 10:27:35,742 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 13.09 10:27:35" (3/4) ... [2024-09-13 10:27:35,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfb9efa and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:27:35, skipping insertion in model container [2024-09-13 10:27:35,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:27:35" (4/4) ... [2024-09-13 10:27:35,744 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2024-09-13 10:27:35,766 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:27:35,766 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 10:27:35,803 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:27:35,810 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;@4b485360, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:27:35,810 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 10:27:35,815 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 10:27:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-13 10:27:35,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:35,825 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-13 10:27:35,825 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting hanoiErr0ENSURES_VIOLATIONPOST_CONDITION === [hanoiErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:27:35,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1876624564, now seen corresponding path program 1 times [2024-09-13 10:27:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:35,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526442557] [2024-09-13 10:27:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:36,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:36,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526442557] [2024-09-13 10:27:36,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526442557] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:36,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:36,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 10:27:36,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581886884] [2024-09-13 10:27:36,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:36,179 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:27:36,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:27:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:36,206 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.5) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:36,315 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-09-13 10:27:36,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:27:36,318 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-09-13 10:27:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:36,325 INFO L225 Difference]: With dead ends: 25 [2024-09-13 10:27:36,326 INFO L226 Difference]: Without dead ends: 23 [2024-09-13 10:27:36,329 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:36,332 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:36,333 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 26 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-13 10:27:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2024-09-13 10:27:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 10:27:36,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-09-13 10:27:36,365 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 6 [2024-09-13 10:27:36,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:36,365 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-09-13 10:27:36,366 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 5 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:36,366 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-09-13 10:27:36,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-13 10:27:36,367 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:36,367 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:36,367 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:27:36,368 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting hanoiErr0ENSURES_VIOLATIONPOST_CONDITION === [hanoiErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:27:36,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:36,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1065326884, now seen corresponding path program 1 times [2024-09-13 10:27:36,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:36,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076020489] [2024-09-13 10:27:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:36,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:36,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:36,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076020489] [2024-09-13 10:27:36,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076020489] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:36,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:36,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:27:36,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403883405] [2024-09-13 10:27:36,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:36,520 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:27:36,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:36,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:27:36,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:27:36,522 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:36,570 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-09-13 10:27:36,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:27:36,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-09-13 10:27:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:36,573 INFO L225 Difference]: With dead ends: 24 [2024-09-13 10:27:36,573 INFO L226 Difference]: Without dead ends: 24 [2024-09-13 10:27:36,574 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:27:36,576 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:36,576 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 16 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:36,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-13 10:27:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2024-09-13 10:27:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 10:27:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-09-13 10:27:36,582 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 9 [2024-09-13 10:27:36,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:36,583 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-09-13 10:27:36,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:36,583 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-09-13 10:27:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-13 10:27:36,585 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:36,585 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:36,585 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 10:27:36,585 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [hanoiErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:27:36,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:36,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1285732838, now seen corresponding path program 1 times [2024-09-13 10:27:36,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:36,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88255901] [2024-09-13 10:27:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:36,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:36,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88255901] [2024-09-13 10:27:36,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88255901] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:36,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:36,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-13 10:27:36,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400475754] [2024-09-13 10:27:36,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:36,849 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:27:36,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:27:36,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:36,851 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:36,910 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-09-13 10:27:36,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:27:36,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-13 10:27:36,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:36,911 INFO L225 Difference]: With dead ends: 26 [2024-09-13 10:27:36,911 INFO L226 Difference]: Without dead ends: 22 [2024-09-13 10:27:36,912 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:36,913 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:36,913 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 21 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:36,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-13 10:27:36,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2024-09-13 10:27:36,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 10:27:36,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2024-09-13 10:27:36,918 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2024-09-13 10:27:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:36,918 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2024-09-13 10:27:36,918 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2024-09-13 10:27:36,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-13 10:27:36,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:36,919 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:36,919 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 10:27:36,919 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting hanoiErr0ENSURES_VIOLATIONPOST_CONDITION === [hanoiErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:27:36,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1639850906, now seen corresponding path program 1 times [2024-09-13 10:27:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:36,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710109093] [2024-09-13 10:27:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:36,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:37,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:27:37,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:37,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:37,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710109093] [2024-09-13 10:27:37,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710109093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:37,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595169764] [2024-09-13 10:27:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:37,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:37,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:37,156 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:37,163 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 10:27:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:37,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 10:27:37,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 10:27:37,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:37,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595169764] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:37,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:37,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2024-09-13 10:27:37,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837920369] [2024-09-13 10:27:37,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:37,573 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 10:27:37,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 10:27:37,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-09-13 10:27:37,576 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:27:37,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:37,687 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2024-09-13 10:27:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:27:37,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 12 [2024-09-13 10:27:37,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:37,688 INFO L225 Difference]: With dead ends: 28 [2024-09-13 10:27:37,688 INFO L226 Difference]: Without dead ends: 28 [2024-09-13 10:27:37,689 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:27:37,690 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:37,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:37,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-13 10:27:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2024-09-13 10:27:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 10:27:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-09-13 10:27:37,695 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2024-09-13 10:27:37,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:37,695 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-09-13 10:27:37,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 10:27:37,695 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-09-13 10:27:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-13 10:27:37,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:37,696 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:37,708 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 10:27:37,897 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:37,897 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [hanoiErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:27:37,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:37,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1215141736, now seen corresponding path program 1 times [2024-09-13 10:27:37,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:37,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140559605] [2024-09-13 10:27:37,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:37,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:37,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:38,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:38,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:38,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140559605] [2024-09-13 10:27:38,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140559605] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:38,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136462055] [2024-09-13 10:27:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:38,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:38,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:38,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:38,098 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 10:27:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 10:27:38,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 10:27:38,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:38,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136462055] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:38,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:38,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 21 [2024-09-13 10:27:38,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231145689] [2024-09-13 10:27:38,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:38,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 10:27:38,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:38,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 10:27:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-09-13 10:27:38,563 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 10:27:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:38,747 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2024-09-13 10:27:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 10:27:38,748 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 16 [2024-09-13 10:27:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:38,749 INFO L225 Difference]: With dead ends: 38 [2024-09-13 10:27:38,749 INFO L226 Difference]: Without dead ends: 30 [2024-09-13 10:27:38,749 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:27:38,750 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:38,750 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 39 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-13 10:27:38,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2024-09-13 10:27:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-13 10:27:38,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2024-09-13 10:27:38,759 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 16 [2024-09-13 10:27:38,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:38,759 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2024-09-13 10:27:38,759 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 15 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 10:27:38,759 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2024-09-13 10:27:38,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 10:27:38,760 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:38,760 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-13 10:27:38,777 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 10:27:38,960 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:38,961 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting hanoiErr0ENSURES_VIOLATIONPOST_CONDITION === [hanoiErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:27:38,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:38,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1947307380, now seen corresponding path program 2 times [2024-09-13 10:27:38,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:38,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553960072] [2024-09-13 10:27:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:38,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:39,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 10:27:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:39,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:39,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 10:27:39,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:39,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553960072] [2024-09-13 10:27:39,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553960072] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:39,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108413423] [2024-09-13 10:27:39,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:27:39,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:39,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:39,189 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:39,191 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 10:27:39,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:27:39,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:39,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 10:27:39,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:39,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-13 10:27:39,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 10:27:39,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108413423] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:39,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:39,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 9] total 14 [2024-09-13 10:27:39,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961353642] [2024-09-13 10:27:39,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:39,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 10:27:39,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:39,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 10:27:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-09-13 10:27:39,563 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-13 10:27:39,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:39,684 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-13 10:27:39,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 10:27:39,685 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 18 [2024-09-13 10:27:39,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:39,686 INFO L225 Difference]: With dead ends: 30 [2024-09-13 10:27:39,686 INFO L226 Difference]: Without dead ends: 28 [2024-09-13 10:27:39,686 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2024-09-13 10:27:39,687 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:39,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 31 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:39,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-13 10:27:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-09-13 10:27:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 10:27:39,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-09-13 10:27:39,692 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2024-09-13 10:27:39,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:39,692 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-09-13 10:27:39,692 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 12 states have internal predecessors, (22), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-13 10:27:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-09-13 10:27:39,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 10:27:39,693 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:39,693 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1] [2024-09-13 10:27:39,715 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 10:27:39,893 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 10:27:39,894 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting hanoiErr0ENSURES_VIOLATIONPOST_CONDITION === [hanoiErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:27:39,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:39,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1454225754, now seen corresponding path program 3 times [2024-09-13 10:27:39,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:39,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478617867] [2024-09-13 10:27:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:39,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:40,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:27:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:40,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:40,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-13 10:27:40,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:40,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478617867] [2024-09-13 10:27:40,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478617867] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:40,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280648854] [2024-09-13 10:27:40,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:27:40,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:40,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:40,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:40,259 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 10:27:40,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-13 10:27:40,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:40,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 10:27:40,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-13 10:27:40,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-13 10:27:40,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280648854] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:40,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:40,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 12] total 17 [2024-09-13 10:27:40,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901909647] [2024-09-13 10:27:40,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:40,915 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 10:27:40,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:40,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 10:27:40,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-09-13 10:27:40,916 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-13 10:27:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:41,071 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-09-13 10:27:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 10:27:41,072 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 30 [2024-09-13 10:27:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:41,073 INFO L225 Difference]: With dead ends: 34 [2024-09-13 10:27:41,073 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 10:27:41,073 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:27:41,074 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:41,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:41,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 10:27:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-13 10:27:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-13 10:27:41,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2024-09-13 10:27:41,085 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 30 [2024-09-13 10:27:41,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:41,085 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2024-09-13 10:27:41,086 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 14 states have internal predecessors, (28), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-13 10:27:41,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2024-09-13 10:27:41,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 10:27:41,086 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:41,086 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1] [2024-09-13 10:27:41,105 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 10:27:41,287 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:41,287 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting hanoiErr0ENSURES_VIOLATIONPOST_CONDITION === [hanoiErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:27:41,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash 859960628, now seen corresponding path program 4 times [2024-09-13 10:27:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:41,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274102395] [2024-09-13 10:27:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:41,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:41,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:27:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:41,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-13 10:27:41,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:41,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274102395] [2024-09-13 10:27:41,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274102395] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:41,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622738147] [2024-09-13 10:27:41,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:27:41,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:41,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:41,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:41,778 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 10:27:41,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:27:41,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:41,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 10:27:41,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:42,050 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-13 10:27:42,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-13 10:27:43,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622738147] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:43,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:43,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 15] total 29 [2024-09-13 10:27:43,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528360159] [2024-09-13 10:27:43,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:43,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 10:27:43,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:43,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 10:27:43,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2024-09-13 10:27:43,014 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-13 10:27:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:43,249 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2024-09-13 10:27:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 10:27:43,250 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) Word has length 36 [2024-09-13 10:27:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:43,250 INFO L225 Difference]: With dead ends: 39 [2024-09-13 10:27:43,251 INFO L226 Difference]: Without dead ends: 39 [2024-09-13 10:27:43,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=1277, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 10:27:43,252 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:43,252 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 51 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:43,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-13 10:27:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2024-09-13 10:27:43,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-13 10:27:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-13 10:27:43,257 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 36 [2024-09-13 10:27:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:43,257 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-13 10:27:43,257 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 21 states have internal predecessors, (41), 7 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (12), 9 states have call predecessors, (12), 6 states have call successors, (12) [2024-09-13 10:27:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-13 10:27:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-13 10:27:43,258 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:43,258 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:43,274 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 10:27:43,458 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-13 10:27:43,459 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [hanoiErr0ENSURES_VIOLATIONPOST_CONDITION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 10:27:43,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:43,459 INFO L85 PathProgramCache]: Analyzing trace with hash 701629400, now seen corresponding path program 2 times [2024-09-13 10:27:43,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:43,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321492080] [2024-09-13 10:27:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:43,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:43,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:43,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:43,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:43,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-13 10:27:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:43,815 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 10:27:43,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:43,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321492080] [2024-09-13 10:27:43,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321492080] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:43,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983316096] [2024-09-13 10:27:43,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:27:43,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:43,819 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:43,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 10:27:43,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 10:27:43,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:43,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 10:27:43,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-13 10:27:44,135 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:27:44,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983316096] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:44,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:27:44,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 17 [2024-09-13 10:27:44,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104638973] [2024-09-13 10:27:44,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:44,135 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:27:44,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:44,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:27:44,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:27:44,136 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 10:27:44,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:44,160 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2024-09-13 10:27:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:27:44,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2024-09-13 10:27:44,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:44,161 INFO L225 Difference]: With dead ends: 22 [2024-09-13 10:27:44,161 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 10:27:44,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2024-09-13 10:27:44,162 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:44,162 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:27:44,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 10:27:44,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 10:27:44,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 10:27:44,163 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2024-09-13 10:27:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:44,163 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 10:27:44,163 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-13 10:27:44,163 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 10:27:44,163 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 10:27:44,165 INFO L785 garLoopResultBuilder]: Registering result SAFE for location hanoiErr0ENSURES_VIOLATIONPOST_CONDITION (1 of 2 remaining) [2024-09-13 10:27:44,166 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2024-09-13 10:27:44,183 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 10:27:44,366 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:44,369 INFO L408 BasicCegarLoop]: Path program histogram: [4, 2, 1, 1, 1] [2024-09-13 10:27:44,371 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 10:27:44,372 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 10:27:44 BoogieIcfgContainer [2024-09-13 10:27:44,373 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 10:27:44,373 INFO L158 Benchmark]: Toolchain (without parser) took 9343.51ms. Allocated memory was 127.9MB in the beginning and 222.3MB in the end (delta: 94.4MB). Free memory was 71.5MB in the beginning and 85.1MB in the end (delta: -13.6MB). Peak memory consumption was 82.6MB. Max. memory is 16.1GB. [2024-09-13 10:27:44,373 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 127.9MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:27:44,373 INFO L158 Benchmark]: Witness Parser took 0.17ms. Allocated memory is still 127.9MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:27:44,374 INFO L158 Benchmark]: CACSL2BoogieTranslator took 286.97ms. Allocated memory is still 127.9MB. Free memory was 71.2MB in the beginning and 99.5MB in the end (delta: -28.3MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2024-09-13 10:27:44,374 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.24ms. Allocated memory was 127.9MB in the beginning and 184.5MB in the end (delta: 56.6MB). Free memory was 99.5MB in the beginning and 157.5MB in the end (delta: -58.0MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. [2024-09-13 10:27:44,374 INFO L158 Benchmark]: Boogie Preprocessor took 39.76ms. Allocated memory is still 184.5MB. Free memory was 157.5MB in the beginning and 156.5MB in the end (delta: 995.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:27:44,374 INFO L158 Benchmark]: RCFGBuilder took 334.92ms. Allocated memory is still 184.5MB. Free memory was 156.5MB in the beginning and 143.9MB in the end (delta: 12.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-13 10:27:44,375 INFO L158 Benchmark]: TraceAbstraction took 8637.65ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 142.9MB in the beginning and 85.1MB in the end (delta: 57.7MB). Peak memory consumption was 95.5MB. Max. memory is 16.1GB. [2024-09-13 10:27:44,376 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 127.9MB. Free memory is still 88.3MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.17ms. Allocated memory is still 127.9MB. Free memory is still 73.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 286.97ms. Allocated memory is still 127.9MB. Free memory was 71.2MB in the beginning and 99.5MB in the end (delta: -28.3MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.24ms. Allocated memory was 127.9MB in the beginning and 184.5MB in the end (delta: 56.6MB). Free memory was 99.5MB in the beginning and 157.5MB in the end (delta: -58.0MB). Peak memory consumption was 2.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.76ms. Allocated memory is still 184.5MB. Free memory was 157.5MB in the beginning and 156.5MB in the end (delta: 995.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 334.92ms. Allocated memory is still 184.5MB. Free memory was 156.5MB in the beginning and 143.9MB in the end (delta: 12.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 8637.65ms. Allocated memory was 184.5MB in the beginning and 222.3MB in the end (delta: 37.7MB). Free memory was 142.9MB in the beginning and 85.1MB in the end (delta: 57.7MB). Peak memory consumption was 95.5MB. 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: 18]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - PositiveResult [Line: 35]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 8.6s, OverallIterations: 9, TraceHistogramMax: 7, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 175 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 149 mSDsluCounter, 257 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 191 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 816 IncrementalHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 66 mSDtfsCounter, 816 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 365 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=7, InterpolantAutomatonStates: 72, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 28 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.5s InterpolantComputationTime, 305 NumberOfCodeBlocks, 287 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 397 ConstructedInterpolants, 0 QuantifiedInterpolants, 1739 SizeOfPredicates, 11 NumberOfNonLiveVariables, 434 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 20 InterpolantComputations, 4 PerfectInterpolantSequences, 338/512 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-13 10:27:44,402 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...