This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 06:24:48,335 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 06:24:48,429 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 06:24:48,437 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 06:24:48,440 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 06:24:48,476 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 06:24:48,477 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 06:24:48,477 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 06:24:48,478 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 06:24:48,483 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 06:24:48,484 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 06:24:48,484 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 06:24:48,485 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 06:24:48,485 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 06:24:48,485 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 06:24:48,485 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 06:24:48,486 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 06:24:48,486 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 06:24:48,486 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 06:24:48,486 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 06:24:48,487 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 06:24:48,489 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 06:24:48,489 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 06:24:48,490 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 06:24:48,490 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 06:24:48,490 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 06:24:48,490 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 06:24:48,491 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 06:24:48,491 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 06:24:48,491 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 06:24:48,492 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 06:24:48,492 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 06:24:48,492 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:24:48,493 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 06:24:48,493 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 06:24:48,493 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 06:24:48,494 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 06:24:48,494 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 06:24:48,495 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 06:24:48,495 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 06:24:48,495 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 06:24:48,496 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 06:24:48,496 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 06:24:48,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 06:24:48,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 06:24:48,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 06:24:48,793 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 06:24:48,794 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 06:24:48,795 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann04.yml/witness-2.1.yml [2024-09-13 06:24:48,854 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 06:24:48,854 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 06:24:48,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/Ackermann04.c [2024-09-13 06:24:50,430 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 06:24:50,619 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 06:24:50,620 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann04.c [2024-09-13 06:24:50,629 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1ea0fa53f/8b340a3bc3334a338bdec00b541ee353/FLAGd31c84d3a [2024-09-13 06:24:51,000 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1ea0fa53f/8b340a3bc3334a338bdec00b541ee353 [2024-09-13 06:24:51,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 06:24:51,002 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 06:24:51,003 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 06:24:51,003 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 06:24:51,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 06:24:51,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:24:48" (1/2) ... [2024-09-13 06:24:51,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7059d0fa and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:24:51, skipping insertion in model container [2024-09-13 06:24:51,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:24:48" (1/2) ... [2024-09-13 06:24:51,014 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@62605aee and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 06:24:51, skipping insertion in model container [2024-09-13 06:24:51,015 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:24:51" (2/2) ... [2024-09-13 06:24:51,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7059d0fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51, skipping insertion in model container [2024-09-13 06:24:51,015 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 06:24:51" (2/2) ... [2024-09-13 06:24:51,022 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 06:24:51,022 INFO L1541 ArrayList]: Function contract at [L16]: requires null, ensures (((\old(n) < \result) || (\old(m) != 0)) && ((0 < \old(m)) || (\old(m) == 0))) [2024-09-13 06:24:51,046 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 06:24:51,193 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/Ackermann04.c[1166,1179] [2024-09-13 06:24:51,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:24:51,210 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 06:24:51,262 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/Ackermann04.c[1166,1179] [2024-09-13 06:24:51,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 06:24:51,285 INFO L204 MainTranslator]: Completed translation [2024-09-13 06:24:51,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51 WrapperNode [2024-09-13 06:24:51,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 06:24:51,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 06:24:51,288 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 06:24:51,289 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 06:24:51,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,302 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,319 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-09-13 06:24:51,319 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 06:24:51,320 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 06:24:51,321 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 06:24:51,321 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 06:24:51,331 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,336 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,351 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure ackermann is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-13 06:24:51,351 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,351 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,358 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,365 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 06:24:51,370 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 06:24:51,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 06:24:51,371 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 06:24:51,371 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (1/1) ... [2024-09-13 06:24:51,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 06:24:51,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:24:51,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 06:24:51,406 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 06:24:51,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 06:24:51,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 06:24:51,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 06:24:51,452 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-09-13 06:24:51,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-09-13 06:24:51,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 06:24:51,508 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 06:24:51,511 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 06:24:51,645 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-13 06:24:51,645 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 06:24:51,678 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 06:24:51,679 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 06:24:51,679 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:24:51 BoogieIcfgContainer [2024-09-13 06:24:51,679 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 06:24:51,681 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 06:24:51,681 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 06:24:51,685 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 06:24:51,685 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 06:24:48" (1/4) ... [2024-09-13 06:24:51,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6024810f and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 06:24:51, skipping insertion in model container [2024-09-13 06:24:51,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 06:24:51" (2/4) ... [2024-09-13 06:24:51,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6024810f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 06:24:51, skipping insertion in model container [2024-09-13 06:24:51,686 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 06:24:51" (3/4) ... [2024-09-13 06:24:51,686 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6024810f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 06:24:51, skipping insertion in model container [2024-09-13 06:24:51,687 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 06:24:51" (4/4) ... [2024-09-13 06:24:51,688 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2024-09-13 06:24:51,719 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 06:24:51,719 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 06:24:51,782 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 06:24:51,789 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;@bb7d9a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 06:24:51,789 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 06:24:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 06:24:51,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-09-13 06:24:51,804 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:24:51,804 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:24:51,806 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:24:51,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:24:51,814 INFO L85 PathProgramCache]: Analyzing trace with hash -26348941, now seen corresponding path program 1 times [2024-09-13 06:24:51,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:24:51,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112619261] [2024-09-13 06:24:51,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:51,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:24:51,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:24:52,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:24:52,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112619261] [2024-09-13 06:24:52,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112619261] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:24:52,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:24:52,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 06:24:52,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011425065] [2024-09-13 06:24:52,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:24:52,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 06:24:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:24:52,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 06:24:52,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 06:24:52,259 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:24:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:24:52,442 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-13 06:24:52,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 06:24:52,445 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-09-13 06:24:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:24:52,453 INFO L225 Difference]: With dead ends: 39 [2024-09-13 06:24:52,454 INFO L226 Difference]: Without dead ends: 36 [2024-09-13 06:24:52,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 06:24:52,459 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:24:52,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:24:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-13 06:24:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2024-09-13 06:24:52,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 06:24:52,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-09-13 06:24:52,502 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 7 [2024-09-13 06:24:52,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:24:52,503 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-09-13 06:24:52,504 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:24:52,504 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-09-13 06:24:52,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-13 06:24:52,505 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:24:52,507 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:24:52,507 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 06:24:52,507 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:24:52,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:24:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1506041859, now seen corresponding path program 1 times [2024-09-13 06:24:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:24:52,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188777637] [2024-09-13 06:24:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:52,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:24:52,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:24:52,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:24:52,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188777637] [2024-09-13 06:24:52,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188777637] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:24:52,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:24:52,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 06:24:52,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540573945] [2024-09-13 06:24:52,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:24:52,793 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:24:52,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:24:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:24:52,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:24:52,796 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:24:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:24:52,884 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-09-13 06:24:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:24:52,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-13 06:24:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:24:52,885 INFO L225 Difference]: With dead ends: 42 [2024-09-13 06:24:52,885 INFO L226 Difference]: Without dead ends: 42 [2024-09-13 06:24:52,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:24:52,887 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:24:52,887 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:24:52,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-13 06:24:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-09-13 06:24:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-13 06:24:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-09-13 06:24:52,903 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 11 [2024-09-13 06:24:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:24:52,903 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-09-13 06:24:52,904 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:24:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-09-13 06:24:52,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-13 06:24:52,906 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:24:52,906 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:24:52,906 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 06:24:52,906 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:24:52,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:24:52,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1508872004, now seen corresponding path program 1 times [2024-09-13 06:24:52,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:24:52,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992543634] [2024-09-13 06:24:52,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:52,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:24:52,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:24:52,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:24:52,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992543634] [2024-09-13 06:24:53,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992543634] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:24:53,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:24:53,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 06:24:53,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182184436] [2024-09-13 06:24:53,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:24:53,001 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 06:24:53,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:24:53,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 06:24:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 06:24:53,003 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:24:53,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:24:53,079 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2024-09-13 06:24:53,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 06:24:53,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-13 06:24:53,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:24:53,083 INFO L225 Difference]: With dead ends: 47 [2024-09-13 06:24:53,084 INFO L226 Difference]: Without dead ends: 47 [2024-09-13 06:24:53,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 06:24:53,086 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:24:53,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:24:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-13 06:24:53,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-09-13 06:24:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-13 06:24:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2024-09-13 06:24:53,100 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 11 [2024-09-13 06:24:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:24:53,100 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2024-09-13 06:24:53,100 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 06:24:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2024-09-13 06:24:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-13 06:24:53,101 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:24:53,101 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:24:53,101 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 06:24:53,102 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:24:53,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:24:53,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1484759222, now seen corresponding path program 1 times [2024-09-13 06:24:53,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:24:53,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225129858] [2024-09-13 06:24:53,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:53,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:24:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:53,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 06:24:53,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:24:53,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225129858] [2024-09-13 06:24:53,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225129858] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:24:53,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 06:24:53,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 06:24:53,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947071406] [2024-09-13 06:24:53,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:24:53,198 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:24:53,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:24:53,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:24:53,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:24:53,199 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 06:24:53,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:24:53,262 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2024-09-13 06:24:53,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 06:24:53,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-13 06:24:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:24:53,265 INFO L225 Difference]: With dead ends: 61 [2024-09-13 06:24:53,265 INFO L226 Difference]: Without dead ends: 57 [2024-09-13 06:24:53,265 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 06:24:53,266 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:24:53,267 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:24:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-13 06:24:53,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2024-09-13 06:24:53,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-13 06:24:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 80 transitions. [2024-09-13 06:24:53,277 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 80 transitions. Word has length 11 [2024-09-13 06:24:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:24:53,277 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 80 transitions. [2024-09-13 06:24:53,277 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 06:24:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 80 transitions. [2024-09-13 06:24:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-13 06:24:53,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:24:53,279 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:24:53,279 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 06:24:53,279 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:24:53,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:24:53,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1264662995, now seen corresponding path program 1 times [2024-09-13 06:24:53,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:24:53,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952913441] [2024-09-13 06:24:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:53,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:24:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:53,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 06:24:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:53,484 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 06:24:53,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:24:53,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952913441] [2024-09-13 06:24:53,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952913441] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:24:53,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115962397] [2024-09-13 06:24:53,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:53,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:24:53,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:24:53,489 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:24:53,490 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 06:24:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:53,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-13 06:24:53,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:24:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 06:24:53,609 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 06:24:53,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115962397] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 06:24:53,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 06:24:53,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-09-13 06:24:53,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273131204] [2024-09-13 06:24:53,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 06:24:53,610 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 06:24:53,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:24:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 06:24:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-13 06:24:53,611 INFO L87 Difference]: Start difference. First operand 51 states and 80 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 06:24:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:24:53,691 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2024-09-13 06:24:53,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 06:24:53,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-13 06:24:53,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:24:53,695 INFO L225 Difference]: With dead ends: 58 [2024-09-13 06:24:53,695 INFO L226 Difference]: Without dead ends: 52 [2024-09-13 06:24:53,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-09-13 06:24:53,698 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:24:53,699 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:24:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-13 06:24:53,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2024-09-13 06:24:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-13 06:24:53,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 65 transitions. [2024-09-13 06:24:53,711 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 65 transitions. Word has length 14 [2024-09-13 06:24:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:24:53,712 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 65 transitions. [2024-09-13 06:24:53,712 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 06:24:53,712 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 65 transitions. [2024-09-13 06:24:53,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 06:24:53,713 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:24:53,713 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:24:53,732 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 06:24:53,914 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:24:53,916 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:24:53,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:24:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash -507496426, now seen corresponding path program 1 times [2024-09-13 06:24:53,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:24:53,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56907238] [2024-09-13 06:24:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:24:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:53,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:53,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:53,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:24:54,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:24:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56907238] [2024-09-13 06:24:54,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56907238] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:24:54,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656689897] [2024-09-13 06:24:54,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:54,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:24:54,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:24:54,003 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:24:54,004 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 06:24:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:54,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-13 06:24:54,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:24:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:24:54,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:24:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 06:24:54,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656689897] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:24:54,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:24:54,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-09-13 06:24:54,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922333747] [2024-09-13 06:24:54,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:24:54,161 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 06:24:54,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:24:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 06:24:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-13 06:24:54,163 INFO L87 Difference]: Start difference. First operand 44 states and 65 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 06:24:54,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:24:54,306 INFO L93 Difference]: Finished difference Result 62 states and 102 transitions. [2024-09-13 06:24:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 06:24:54,306 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 18 [2024-09-13 06:24:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:24:54,309 INFO L225 Difference]: With dead ends: 62 [2024-09-13 06:24:54,309 INFO L226 Difference]: Without dead ends: 53 [2024-09-13 06:24:54,310 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-13 06:24:54,310 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:24:54,311 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 56 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:24:54,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-13 06:24:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-09-13 06:24:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2024-09-13 06:24:54,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2024-09-13 06:24:54,318 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 18 [2024-09-13 06:24:54,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:24:54,319 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2024-09-13 06:24:54,319 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 06:24:54,319 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2024-09-13 06:24:54,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 06:24:54,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:24:54,321 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:24:54,337 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 06:24:54,521 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 06:24:54,522 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:24:54,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:24:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -506552652, now seen corresponding path program 1 times [2024-09-13 06:24:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:24:54,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824938468] [2024-09-13 06:24:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:54,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:24:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:54,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:54,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:54,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:54,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:54,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:54,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:24:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:54,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:24:54,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:54,827 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-13 06:24:54,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:24:54,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824938468] [2024-09-13 06:24:54,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824938468] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:24:54,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70564319] [2024-09-13 06:24:54,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:54,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:24:54,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:24:54,830 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 06:24:54,832 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 06:24:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:54,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 06:24:54,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:24:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-13 06:24:54,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:24:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-13 06:24:55,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70564319] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:24:55,567 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:24:55,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2024-09-13 06:24:55,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766147842] [2024-09-13 06:24:55,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:24:55,568 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 06:24:55,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:24:55,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 06:24:55,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-09-13 06:24:55,570 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-13 06:24:55,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:24:55,693 INFO L93 Difference]: Finished difference Result 76 states and 108 transitions. [2024-09-13 06:24:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 06:24:55,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2024-09-13 06:24:55,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:24:55,695 INFO L225 Difference]: With dead ends: 76 [2024-09-13 06:24:55,695 INFO L226 Difference]: Without dead ends: 58 [2024-09-13 06:24:55,695 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2024-09-13 06:24:55,696 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 06:24:55,696 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 59 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 06:24:55,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-13 06:24:55,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-09-13 06:24:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2024-09-13 06:24:55,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-09-13 06:24:55,703 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 44 [2024-09-13 06:24:55,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:24:55,703 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-09-13 06:24:55,704 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-13 06:24:55,704 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-09-13 06:24:55,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-13 06:24:55,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:24:55,708 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:24:55,726 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 06:24:55,908 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 06:24:55,909 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:24:55,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:24:55,910 INFO L85 PathProgramCache]: Analyzing trace with hash 320389373, now seen corresponding path program 2 times [2024-09-13 06:24:55,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:24:55,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366979153] [2024-09-13 06:24:55,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:55,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:24:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:24:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 06:24:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:24:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-13 06:24:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:24:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:24:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:24:56,842 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 114 proven. 279 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-13 06:24:56,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:24:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366979153] [2024-09-13 06:24:56,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366979153] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:24:56,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107164751] [2024-09-13 06:24:56,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 06:24:56,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:24:56,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:24:56,845 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 06:24:56,847 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 06:24:56,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 06:24:56,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:24:56,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-13 06:24:56,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:24:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-13 06:24:57,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:24:58,838 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2024-09-13 06:24:58,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107164751] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:24:58,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:24:58,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 32 [2024-09-13 06:24:58,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57174224] [2024-09-13 06:24:58,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:24:58,840 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 06:24:58,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:24:58,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 06:24:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2024-09-13 06:24:58,845 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2024-09-13 06:24:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:24:59,680 INFO L93 Difference]: Finished difference Result 94 states and 135 transitions. [2024-09-13 06:24:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-13 06:24:59,680 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) Word has length 118 [2024-09-13 06:24:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:24:59,682 INFO L225 Difference]: With dead ends: 94 [2024-09-13 06:24:59,683 INFO L226 Difference]: Without dead ends: 94 [2024-09-13 06:24:59,684 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2024-09-13 06:24:59,685 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 06:24:59,685 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 102 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 06:24:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-13 06:24:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2024-09-13 06:24:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 16 states have call successors, (16), 7 states have call predecessors, (16), 11 states have return successors, (41), 18 states have call predecessors, (41), 16 states have call successors, (41) [2024-09-13 06:24:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 116 transitions. [2024-09-13 06:24:59,696 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 116 transitions. Word has length 118 [2024-09-13 06:24:59,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:24:59,696 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 116 transitions. [2024-09-13 06:24:59,696 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2024-09-13 06:24:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 116 transitions. [2024-09-13 06:24:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-13 06:24:59,703 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:24:59,703 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:24:59,721 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 06:24:59,904 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:24:59,904 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:24:59,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:24:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1065367807, now seen corresponding path program 3 times [2024-09-13 06:24:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:24:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041210599] [2024-09-13 06:24:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:24:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:24:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 06:25:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-13 06:25:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:00,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 148 proven. 171 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-09-13 06:25:00,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:25:00,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041210599] [2024-09-13 06:25:00,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041210599] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:25:00,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477929501] [2024-09-13 06:25:00,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 06:25:00,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:25:00,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:25:00,716 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 06:25:00,718 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 06:25:00,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-13 06:25:00,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:25:00,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 06:25:00,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:25:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 190 proven. 71 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-13 06:25:00,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:25:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 208 proven. 61 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2024-09-13 06:25:02,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477929501] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:25:02,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:25:02,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 15] total 28 [2024-09-13 06:25:02,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575189655] [2024-09-13 06:25:02,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:25:02,158 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 06:25:02,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:25:02,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 06:25:02,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-09-13 06:25:02,160 INFO L87 Difference]: Start difference. First operand 81 states and 116 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 23 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (24), 14 states have call predecessors, (24), 11 states have call successors, (24) [2024-09-13 06:25:02,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:25:02,666 INFO L93 Difference]: Finished difference Result 102 states and 146 transitions. [2024-09-13 06:25:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 06:25:02,667 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 23 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (24), 14 states have call predecessors, (24), 11 states have call successors, (24) Word has length 104 [2024-09-13 06:25:02,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:25:02,669 INFO L225 Difference]: With dead ends: 102 [2024-09-13 06:25:02,669 INFO L226 Difference]: Without dead ends: 99 [2024-09-13 06:25:02,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 06:25:02,672 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:25:02,672 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 104 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:25:02,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-13 06:25:02,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-13 06:25:02,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 19 states have call successors, (19), 8 states have call predecessors, (19), 14 states have return successors, (49), 24 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-13 06:25:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 139 transitions. [2024-09-13 06:25:02,687 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 139 transitions. Word has length 104 [2024-09-13 06:25:02,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:25:02,688 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 139 transitions. [2024-09-13 06:25:02,688 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 23 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (24), 14 states have call predecessors, (24), 11 states have call successors, (24) [2024-09-13 06:25:02,688 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 139 transitions. [2024-09-13 06:25:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-09-13 06:25:02,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:25:02,690 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:25:02,704 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 06:25:02,894 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:25:02,894 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:25:02,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:25:02,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1993615657, now seen corresponding path program 4 times [2024-09-13 06:25:02,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:25:02,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993006884] [2024-09-13 06:25:02,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:25:02,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:25:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 06:25:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:25:03,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-13 06:25:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:25:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 139 proven. 307 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2024-09-13 06:25:03,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:25:03,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993006884] [2024-09-13 06:25:03,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993006884] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:25:03,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766970222] [2024-09-13 06:25:03,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 06:25:03,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:25:03,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:25:03,667 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 06:25:03,669 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 06:25:03,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 06:25:03,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:25:03,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 06:25:03,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:25:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-13 06:25:03,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:25:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 06:25:05,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766970222] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:25:05,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:25:05,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2024-09-13 06:25:05,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241770847] [2024-09-13 06:25:05,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:25:05,477 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 06:25:05,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:25:05,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 06:25:05,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-09-13 06:25:05,479 INFO L87 Difference]: Start difference. First operand 99 states and 139 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 21 states have internal predecessors, (69), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2024-09-13 06:25:05,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:25:05,938 INFO L93 Difference]: Finished difference Result 121 states and 175 transitions. [2024-09-13 06:25:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 06:25:05,938 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 21 states have internal predecessors, (69), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) Word has length 130 [2024-09-13 06:25:05,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:25:05,940 INFO L225 Difference]: With dead ends: 121 [2024-09-13 06:25:05,940 INFO L226 Difference]: Without dead ends: 121 [2024-09-13 06:25:05,941 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 282 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 06:25:05,942 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 06:25:05,942 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 102 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 06:25:05,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-13 06:25:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2024-09-13 06:25:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 75 states have internal predecessors, (80), 22 states have call successors, (22), 8 states have call predecessors, (22), 17 states have return successors, (62), 30 states have call predecessors, (62), 22 states have call successors, (62) [2024-09-13 06:25:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 164 transitions. [2024-09-13 06:25:05,956 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 164 transitions. Word has length 130 [2024-09-13 06:25:05,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:25:05,956 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 164 transitions. [2024-09-13 06:25:05,956 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 21 states have internal predecessors, (69), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2024-09-13 06:25:05,957 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 164 transitions. [2024-09-13 06:25:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-13 06:25:05,958 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:25:05,959 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:25:05,977 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 06:25:06,162 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 06:25:06,163 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:25:06,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:25:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1800834689, now seen corresponding path program 5 times [2024-09-13 06:25:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:25:06,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277361212] [2024-09-13 06:25:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:25:06,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:25:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:06,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:06,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:06,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 06:25:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:25:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 06:25:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-13 06:25:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:25:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 06:25:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 308 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2024-09-13 06:25:07,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:25:07,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277361212] [2024-09-13 06:25:07,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277361212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:25:07,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100882488] [2024-09-13 06:25:07,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 06:25:07,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:25:07,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:25:07,559 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:25:07,560 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 06:25:07,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-13 06:25:07,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:25:07,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 06:25:07,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:25:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2024-09-13 06:25:07,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:25:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2024-09-13 06:25:11,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100882488] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:25:11,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:25:11,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2024-09-13 06:25:11,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072756336] [2024-09-13 06:25:11,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:25:11,606 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 06:25:11,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:25:11,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 06:25:11,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 06:25:11,608 INFO L87 Difference]: Start difference. First operand 114 states and 164 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-13 06:25:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:25:12,337 INFO L93 Difference]: Finished difference Result 143 states and 219 transitions. [2024-09-13 06:25:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 06:25:12,339 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) Word has length 156 [2024-09-13 06:25:12,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:25:12,341 INFO L225 Difference]: With dead ends: 143 [2024-09-13 06:25:12,341 INFO L226 Difference]: Without dead ends: 143 [2024-09-13 06:25:12,342 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 335 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=752, Invalid=3408, Unknown=0, NotChecked=0, Total=4160 [2024-09-13 06:25:12,342 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:25:12,343 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 120 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:25:12,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-13 06:25:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2024-09-13 06:25:12,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.072289156626506) internal successors, (89), 84 states have internal predecessors, (89), 25 states have call successors, (25), 8 states have call predecessors, (25), 20 states have return successors, (83), 36 states have call predecessors, (83), 25 states have call successors, (83) [2024-09-13 06:25:12,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 197 transitions. [2024-09-13 06:25:12,361 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 197 transitions. Word has length 156 [2024-09-13 06:25:12,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:25:12,361 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 197 transitions. [2024-09-13 06:25:12,362 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-13 06:25:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 197 transitions. [2024-09-13 06:25:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-09-13 06:25:12,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:25:12,364 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:25:12,378 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 06:25:12,567 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:25:12,568 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:25:12,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:25:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash -707320168, now seen corresponding path program 6 times [2024-09-13 06:25:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:25:12,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948867036] [2024-09-13 06:25:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:25:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:25:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:12,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 06:25:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:13,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:25:13,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 06:25:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-13 06:25:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:13,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:14,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:14,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:14,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:14,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:25:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:14,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 06:25:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:14,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 06:25:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:14,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 400 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-09-13 06:25:14,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:25:14,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948867036] [2024-09-13 06:25:14,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948867036] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:25:14,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166929717] [2024-09-13 06:25:14,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 06:25:14,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:25:14,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:25:14,045 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:25:14,047 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 06:25:14,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-09-13 06:25:14,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 06:25:14,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-13 06:25:14,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:25:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2024-09-13 06:25:14,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:25:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2024-09-13 06:25:18,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166929717] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:25:18,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:25:18,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 28] total 35 [2024-09-13 06:25:18,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591023543] [2024-09-13 06:25:18,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:25:18,247 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-13 06:25:18,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:25:18,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-13 06:25:18,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 06:25:18,248 INFO L87 Difference]: Start difference. First operand 129 states and 197 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2024-09-13 06:25:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:25:18,984 INFO L93 Difference]: Finished difference Result 165 states and 263 transitions. [2024-09-13 06:25:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-13 06:25:18,985 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) Word has length 169 [2024-09-13 06:25:18,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:25:18,988 INFO L225 Difference]: With dead ends: 165 [2024-09-13 06:25:18,988 INFO L226 Difference]: Without dead ends: 165 [2024-09-13 06:25:18,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 364 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=3340, Unknown=0, NotChecked=0, Total=4160 [2024-09-13 06:25:18,990 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 06:25:18,991 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 124 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 06:25:18,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-13 06:25:19,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2024-09-13 06:25:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 92 states have (on average 1.065217391304348) internal successors, (98), 93 states have internal predecessors, (98), 28 states have call successors, (28), 8 states have call predecessors, (28), 23 states have return successors, (104), 42 states have call predecessors, (104), 28 states have call successors, (104) [2024-09-13 06:25:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 230 transitions. [2024-09-13 06:25:19,019 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 230 transitions. Word has length 169 [2024-09-13 06:25:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:25:19,021 INFO L474 AbstractCegarLoop]: Abstraction has 144 states and 230 transitions. [2024-09-13 06:25:19,022 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2024-09-13 06:25:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 230 transitions. [2024-09-13 06:25:19,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-13 06:25:19,026 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 06:25:19,026 INFO L216 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 06:25:19,048 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 06:25:19,226 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:25:19,227 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 06:25:19,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 06:25:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1950095843, now seen corresponding path program 7 times [2024-09-13 06:25:19,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 06:25:19,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459645077] [2024-09-13 06:25:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 06:25:19,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 06:25:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:19,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:19,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 06:25:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:20,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:25:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 06:25:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-13 06:25:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 06:25:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 06:25:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 06:25:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 06:25:20,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 06:25:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 06:25:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:20,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2024-09-13 06:25:20,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 06:25:20,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459645077] [2024-09-13 06:25:20,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459645077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 06:25:20,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572035607] [2024-09-13 06:25:20,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 06:25:20,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 06:25:20,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 06:25:20,792 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 06:25:20,794 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 06:25:21,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 06:25:21,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-13 06:25:21,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 06:25:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2024-09-13 06:25:21,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 06:25:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2024-09-13 06:25:27,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572035607] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 06:25:27,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 06:25:27,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 33] total 37 [2024-09-13 06:25:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46555326] [2024-09-13 06:25:27,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 06:25:27,507 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-13 06:25:27,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 06:25:27,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-13 06:25:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 06:25:27,508 INFO L87 Difference]: Start difference. First operand 144 states and 230 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 30 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-13 06:25:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 06:25:28,691 INFO L93 Difference]: Finished difference Result 160 states and 252 transitions. [2024-09-13 06:25:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 06:25:28,691 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 30 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 182 [2024-09-13 06:25:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 06:25:28,692 INFO L225 Difference]: With dead ends: 160 [2024-09-13 06:25:28,692 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 06:25:28,694 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 396 SyntacticMatches, 20 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=766, Invalid=3790, Unknown=0, NotChecked=0, Total=4556 [2024-09-13 06:25:28,694 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 06:25:28,694 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 72 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 06:25:28,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 06:25:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 06:25:28,695 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 06:25:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 06:25:28,696 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 182 [2024-09-13 06:25:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 06:25:28,697 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 06:25:28,697 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 30 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-13 06:25:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 06:25:28,697 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 06:25:28,700 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-13 06:25:28,700 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ackermannErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-13 06:25:28,719 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 06:25:28,904 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 06:25:28,907 INFO L408 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1, 1, 1, 1] [2024-09-13 06:25:28,909 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 06:25:28,911 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 06:25:28 BoogieIcfgContainer [2024-09-13 06:25:28,911 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 06:25:28,912 INFO L158 Benchmark]: Toolchain (without parser) took 37909.77ms. Allocated memory was 142.6MB in the beginning and 564.1MB in the end (delta: 421.5MB). Free memory was 86.0MB in the beginning and 338.2MB in the end (delta: -252.3MB). Peak memory consumption was 171.5MB. Max. memory is 16.1GB. [2024-09-13 06:25:28,912 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 105.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 06:25:28,912 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 142.6MB. Free memory is still 103.7MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 06:25:28,912 INFO L158 Benchmark]: CACSL2BoogieTranslator took 284.36ms. Allocated memory is still 142.6MB. Free memory was 85.5MB in the beginning and 72.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-13 06:25:28,912 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.52ms. Allocated memory is still 142.6MB. Free memory was 72.6MB in the beginning and 71.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 06:25:28,913 INFO L158 Benchmark]: Boogie Preprocessor took 49.00ms. Allocated memory is still 142.6MB. Free memory was 71.3MB in the beginning and 69.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 06:25:28,913 INFO L158 Benchmark]: RCFGBuilder took 309.11ms. Allocated memory is still 142.6MB. Free memory was 69.6MB in the beginning and 57.5MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-13 06:25:28,913 INFO L158 Benchmark]: TraceAbstraction took 37230.16ms. Allocated memory was 142.6MB in the beginning and 564.1MB in the end (delta: 421.5MB). Free memory was 56.7MB in the beginning and 338.2MB in the end (delta: -281.6MB). Peak memory consumption was 142.2MB. Max. memory is 16.1GB. [2024-09-13 06:25:28,914 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.14ms. Allocated memory is still 142.6MB. Free memory is still 105.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 142.6MB. Free memory is still 103.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 284.36ms. Allocated memory is still 142.6MB. Free memory was 85.5MB in the beginning and 72.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.52ms. Allocated memory is still 142.6MB. Free memory was 72.6MB in the beginning and 71.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.00ms. Allocated memory is still 142.6MB. Free memory was 71.3MB in the beginning and 69.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 309.11ms. Allocated memory is still 142.6MB. Free memory was 69.6MB in the beginning and 57.5MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 37230.16ms. Allocated memory was 142.6MB in the beginning and 564.1MB in the end (delta: 421.5MB). Free memory was 56.7MB in the beginning and 338.2MB in the end (delta: -281.6MB). Peak memory consumption was 142.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 16]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 37.1s, OverallIterations: 13, TraceHistogramMax: 27, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 477 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 449 mSDsluCounter, 946 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 738 mSDsCounter, 547 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4290 IncrementalHoareTripleChecker+Invalid, 4837 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 547 mSolverCounterUnsat, 208 mSDtfsCounter, 4290 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2454 GetRequests, 2002 SyntacticMatches, 75 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4103 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=12, InterpolantAutomatonStates: 221, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 95 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 28.1s InterpolantComputationTime, 1910 NumberOfCodeBlocks, 1857 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2801 ConstructedInterpolants, 0 QuantifiedInterpolants, 5671 SizeOfPredicates, 28 NumberOfNonLiveVariables, 2870 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 30 InterpolantComputations, 5 PerfectInterpolantSequences, 15744/19669 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-13 06:25:28,942 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...