This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:45:18,620 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:45:18,683 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:45:18,689 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:45:18,691 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:45:18,716 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:45:18,716 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:45:18,717 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:45:18,717 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:45:18,717 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:45:18,718 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:45:18,718 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:45:18,718 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:45:18,719 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:45:18,720 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:45:18,721 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:45:18,721 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:45:18,721 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:45:18,721 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:45:18,721 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:45:18,722 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:45:18,722 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:45:18,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:45:18,725 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:45:18,725 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:45:18,725 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:45:18,726 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:45:18,726 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:45:18,726 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:45:18,726 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:45:18,726 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:45:18,726 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:45:18,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:45:18,727 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:45:18,727 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:45:18,727 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:45:18,727 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:45:18,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:45:18,728 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:45:18,728 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:45:18,728 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:45:18,729 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:45:18,729 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-20 13:45:18,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:45:18,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:45:18,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:45:18,978 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-20 13:45:18,978 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-20 13:45:18,980 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann03.yml/witness-2.1.yml [2024-09-20 13:45:19,031 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:45:19,032 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:45:19,033 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/Ackermann03.c [2024-09-20 13:45:20,408 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:45:20,546 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:45:20,546 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann03.c [2024-09-20 13:45:20,551 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2053442f2/c4f9985179e046368065334fc9d1b15d/FLAG66769ec85 [2024-09-20 13:45:20,964 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2053442f2/c4f9985179e046368065334fc9d1b15d [2024-09-20 13:45:20,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:45:20,965 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-20 13:45:20,966 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:45:20,966 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:45:20,976 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:45:20,981 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:45:19" (1/2) ... [2024-09-20 13:45:20,981 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be85d82 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:20, skipping insertion in model container [2024-09-20 13:45:20,982 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:45:19" (1/2) ... [2024-09-20 13:45:20,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@31da8098 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:20, skipping insertion in model container [2024-09-20 13:45:20,983 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:45:20" (2/2) ... [2024-09-20 13:45:20,983 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1be85d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:20, skipping insertion in model container [2024-09-20 13:45:20,983 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:45:20" (2/2) ... [2024-09-20 13:45:20,992 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-20 13:45:20,993 INFO L1541 ArrayList]: Function contract at [L16]: requires null, ensures (((((((((((((((((\result == 5) && (\old(n) == 3)) || (((\result == 3) && (\old(n) == 1)) && (\old(m) == 1))) || (\old(m) == 0)) || (((2 <= \old(m)) && (3 <= \old(n))) && (5 <= \result))) || (((\old(n) == 0) && (\result == 2)) && (\old(m) == 1))) || (((2 <= \old(m)) && (2 <= \old(n))) && (\result == 7))) || ((\result == 5) && (\old(n) == 1))) || (((\result == 7) && (5 <= \old(n))) && (\old(m) == 1))) || (((\old(n) == 0) && (2 <= \old(m))) && (\result == 3))) || ((\result == 6) && (\old(n) == 4))) || (((5 <= \result) && (6 <= \old(n))) && (\old(m) == 1))) || (((\result == 4) && (\old(n) == 2)) && (\old(m) == 1))) || ((3 <= \old(m)) && (3 <= \result))) && ((0 < \old(m)) || (\result == ((long long) \old(n) + 1)))) && (((((\result == 3) && (\old(m) == 1)) || (1 < \old(m))) || (\result == 2)) || (\old(n) != 1))) && (((\old(m) == 0) || (\old(n) == 0)) || (0 < \old(n)))) [2024-09-20 13:45:21,007 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:45:21,116 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2024-09-20 13:45:21,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:45:21,137 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-20 13:45:21,184 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2024-09-20 13:45:21,186 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:45:21,200 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:45:21,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21 WrapperNode [2024-09-20 13:45:21,202 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:45:21,202 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:45:21,203 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:45:21,203 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:45:21,208 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,214 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,226 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-09-20 13:45:21,226 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:45:21,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:45:21,227 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:45:21,227 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:45:21,240 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,241 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,243 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,250 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure ackermann is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-20 13:45:21,253 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,253 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,261 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,262 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,263 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,263 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,268 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:45:21,269 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:45:21,269 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:45:21,269 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:45:21,270 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (1/1) ... [2024-09-20 13:45:21,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:45:21,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:21,294 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 13:45:21,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 13:45:21,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:45:21,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:45:21,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:45:21,328 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-09-20 13:45:21,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-09-20 13:45:21,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-20 13:45:21,375 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:45:21,377 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:45:21,520 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-20 13:45:21,520 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:45:21,535 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:45:21,536 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 13:45:21,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:45:21 BoogieIcfgContainer [2024-09-20 13:45:21,536 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:45:21,538 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:45:21,538 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:45:21,540 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:45:21,540 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:45:19" (1/4) ... [2024-09-20 13:45:21,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a456533 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.09 01:45:21, skipping insertion in model container [2024-09-20 13:45:21,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:45:20" (2/4) ... [2024-09-20 13:45:21,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a456533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:45:21, skipping insertion in model container [2024-09-20 13:45:21,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:21" (3/4) ... [2024-09-20 13:45:21,543 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a456533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:45:21, skipping insertion in model container [2024-09-20 13:45:21,544 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:45:21" (4/4) ... [2024-09-20 13:45:21,545 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2024-09-20 13:45:21,561 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:45:21,561 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-20 13:45:21,595 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:45:21,600 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;@2c0acf2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:45:21,600 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-20 13:45:21,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 13:45:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-09-20 13:45:21,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:21,608 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:21,609 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:21,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:21,613 INFO L85 PathProgramCache]: Analyzing trace with hash -26348941, now seen corresponding path program 1 times [2024-09-20 13:45:21,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:21,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183872229] [2024-09-20 13:45:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:21,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:21,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:21,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183872229] [2024-09-20 13:45:21,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183872229] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:21,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:21,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:45:21,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047669242] [2024-09-20 13:45:21,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:21,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 13:45:21,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:22,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 13:45:22,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:45:22,007 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:22,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:22,122 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-20 13:45:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 13:45:22,132 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-09-20 13:45:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:22,141 INFO L225 Difference]: With dead ends: 39 [2024-09-20 13:45:22,145 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 13:45:22,149 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:45:22,151 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:22,152 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:22,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 13:45:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2024-09-20 13:45:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 13:45:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-09-20 13:45:22,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 7 [2024-09-20 13:45:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:22,180 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-09-20 13:45:22,180 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-09-20 13:45:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 13:45:22,181 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:22,181 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:22,181 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:45:22,182 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:22,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1506041859, now seen corresponding path program 1 times [2024-09-20 13:45:22,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:22,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138626594] [2024-09-20 13:45:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:22,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:22,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:22,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138626594] [2024-09-20 13:45:22,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138626594] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:22,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:22,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 13:45:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875123767] [2024-09-20 13:45:22,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:22,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:45:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:45:22,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:22,392 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:22,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:22,452 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-09-20 13:45:22,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:45:22,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-20 13:45:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:22,454 INFO L225 Difference]: With dead ends: 42 [2024-09-20 13:45:22,454 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 13:45:22,454 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:22,455 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:22,456 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:22,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 13:45:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-09-20 13:45:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 13:45:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-09-20 13:45:22,466 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 11 [2024-09-20 13:45:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:22,467 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-09-20 13:45:22,467 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:22,467 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-09-20 13:45:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 13:45:22,468 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:22,468 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:22,469 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 13:45:22,469 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:22,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:22,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1508872004, now seen corresponding path program 1 times [2024-09-20 13:45:22,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:22,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474349595] [2024-09-20 13:45:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:22,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:22,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:22,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474349595] [2024-09-20 13:45:22,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474349595] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:22,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:22,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 13:45:22,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692344464] [2024-09-20 13:45:22,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:22,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 13:45:22,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:22,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 13:45:22,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 13:45:22,540 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:22,593 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2024-09-20 13:45:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:45:22,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-20 13:45:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:22,594 INFO L225 Difference]: With dead ends: 57 [2024-09-20 13:45:22,594 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 13:45:22,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:22,596 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:22,596 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 69 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:45:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 13:45:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-09-20 13:45:22,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 37 states have internal predecessors, (46), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2024-09-20 13:45:22,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2024-09-20 13:45:22,604 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 11 [2024-09-20 13:45:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:22,604 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2024-09-20 13:45:22,604 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2024-09-20 13:45:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-20 13:45:22,605 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:22,605 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:22,605 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 13:45:22,605 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:22,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:22,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1484759222, now seen corresponding path program 1 times [2024-09-20 13:45:22,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:22,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876392482] [2024-09-20 13:45:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:22,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:22,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:22,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876392482] [2024-09-20 13:45:22,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876392482] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:22,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:22,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:45:22,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506972524] [2024-09-20 13:45:22,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:22,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:45:22,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:45:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:22,657 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:22,699 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2024-09-20 13:45:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:45:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-20 13:45:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:22,700 INFO L225 Difference]: With dead ends: 58 [2024-09-20 13:45:22,701 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 13:45:22,701 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:22,702 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:22,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:45:22,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 13:45:22,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-09-20 13:45:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2024-09-20 13:45:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2024-09-20 13:45:22,715 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 11 [2024-09-20 13:45:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:22,716 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2024-09-20 13:45:22,717 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:22,717 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2024-09-20 13:45:22,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 13:45:22,717 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:22,717 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:22,718 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 13:45:22,718 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:22,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:22,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1264662995, now seen corresponding path program 1 times [2024-09-20 13:45:22,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:22,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270582305] [2024-09-20 13:45:22,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:22,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:23,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:45:23,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:23,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:23,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:23,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270582305] [2024-09-20 13:45:23,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270582305] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:23,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944700098] [2024-09-20 13:45:23,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:23,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:23,110 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:23,111 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:45:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:23,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 13:45:23,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:23,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:24,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944700098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:24,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:24,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2024-09-20 13:45:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678947490] [2024-09-20 13:45:24,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:24,223 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 13:45:24,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:24,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 13:45:24,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-20 13:45:24,226 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 13:45:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:24,790 INFO L93 Difference]: Finished difference Result 76 states and 118 transitions. [2024-09-20 13:45:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 13:45:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 14 [2024-09-20 13:45:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:24,792 INFO L225 Difference]: With dead ends: 76 [2024-09-20 13:45:24,792 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 13:45:24,793 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2024-09-20 13:45:24,794 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:24,794 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 85 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:45:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 13:45:24,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2024-09-20 13:45:24,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2024-09-20 13:45:24,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2024-09-20 13:45:24,802 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 14 [2024-09-20 13:45:24,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:24,802 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2024-09-20 13:45:24,803 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 13:45:24,803 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2024-09-20 13:45:24,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 13:45:24,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:24,807 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:24,820 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 13:45:25,011 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:25,012 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:25,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash -507496426, now seen corresponding path program 1 times [2024-09-20 13:45:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981014986] [2024-09-20 13:45:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:45:25,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981014986] [2024-09-20 13:45:25,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981014986] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:25,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2778836] [2024-09-20 13:45:25,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:25,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:25,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:25,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:25,073 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:45:25,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 13:45:25,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:45:25,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:45:25,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2778836] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:25,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:25,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-09-20 13:45:25,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139798218] [2024-09-20 13:45:25,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:25,167 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 13:45:25,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 13:45:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-20 13:45:25,168 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 13:45:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:25,275 INFO L93 Difference]: Finished difference Result 77 states and 120 transitions. [2024-09-20 13:45:25,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:45:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 18 [2024-09-20 13:45:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:25,276 INFO L225 Difference]: With dead ends: 77 [2024-09-20 13:45:25,277 INFO L226 Difference]: Without dead ends: 72 [2024-09-20 13:45:25,277 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-20 13:45:25,277 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:25,278 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 54 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:25,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-20 13:45:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2024-09-20 13:45:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 12 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) [2024-09-20 13:45:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2024-09-20 13:45:25,285 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 18 [2024-09-20 13:45:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:25,285 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2024-09-20 13:45:25,285 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 13:45:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2024-09-20 13:45:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 13:45:25,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:25,286 INFO L216 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:25,299 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 13:45:25,490 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 13:45:25,491 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:25,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:25,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1491759416, now seen corresponding path program 1 times [2024-09-20 13:45:25,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:25,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952110382] [2024-09-20 13:45:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:25,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:45:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:25,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:26,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 13:45:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:26,077 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 13:45:26,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:26,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952110382] [2024-09-20 13:45:26,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952110382] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:26,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660802773] [2024-09-20 13:45:26,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:26,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:26,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:26,079 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:26,080 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:45:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:26,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-20 13:45:26,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 13:45:26,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 13:45:27,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660802773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:27,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:27,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-09-20 13:45:27,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658132932] [2024-09-20 13:45:27,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:27,966 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:45:27,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:27,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:45:27,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:45:27,967 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 13:45:29,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:29,619 INFO L93 Difference]: Finished difference Result 133 states and 232 transitions. [2024-09-20 13:45:29,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-20 13:45:29,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 31 [2024-09-20 13:45:29,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:29,622 INFO L225 Difference]: With dead ends: 133 [2024-09-20 13:45:29,622 INFO L226 Difference]: Without dead ends: 129 [2024-09-20 13:45:29,623 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=433, Invalid=2117, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 13:45:29,623 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 128 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:29,624 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 85 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 13:45:29,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-09-20 13:45:29,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2024-09-20 13:45:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 68 states have (on average 1.161764705882353) internal successors, (79), 66 states have internal predecessors, (79), 19 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (61), 29 states have call predecessors, (61), 19 states have call successors, (61) [2024-09-20 13:45:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 159 transitions. [2024-09-20 13:45:29,650 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 159 transitions. Word has length 31 [2024-09-20 13:45:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:29,650 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 159 transitions. [2024-09-20 13:45:29,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 13:45:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 159 transitions. [2024-09-20 13:45:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 13:45:29,652 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:29,652 INFO L216 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-20 13:45:29,667 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 13:45:29,853 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 13:45:29,853 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:29,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:29,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1840574351, now seen corresponding path program 2 times [2024-09-20 13:45:29,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:29,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994582153] [2024-09-20 13:45:29,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:29,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:29,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 13:45:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:30,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:30,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:30,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:30,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:30,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 13:45:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 56 proven. 28 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-09-20 13:45:30,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:30,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994582153] [2024-09-20 13:45:30,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994582153] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:30,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319084905] [2024-09-20 13:45:30,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:45:30,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:30,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:30,186 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:30,187 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:45:30,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:45:30,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:30,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 13:45:30,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 69 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-20 13:45:30,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 42 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 13:45:30,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319084905] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:30,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:30,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2024-09-20 13:45:30,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116006088] [2024-09-20 13:45:30,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:30,450 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 13:45:30,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:30,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 13:45:30,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-09-20 13:45:30,451 INFO L87 Difference]: Start difference. First operand 102 states and 159 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 15 states have internal predecessors, (52), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-20 13:45:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:30,897 INFO L93 Difference]: Finished difference Result 152 states and 275 transitions. [2024-09-20 13:45:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 13:45:30,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 15 states have internal predecessors, (52), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 59 [2024-09-20 13:45:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:30,899 INFO L225 Difference]: With dead ends: 152 [2024-09-20 13:45:30,899 INFO L226 Difference]: Without dead ends: 147 [2024-09-20 13:45:30,899 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 13:45:30,900 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:30,900 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 133 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 13:45:30,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-20 13:45:30,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2024-09-20 13:45:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 76 states have internal predecessors, (92), 22 states have call successors, (22), 7 states have call predecessors, (22), 15 states have return successors, (65), 36 states have call predecessors, (65), 22 states have call successors, (65) [2024-09-20 13:45:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 179 transitions. [2024-09-20 13:45:30,911 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 179 transitions. Word has length 59 [2024-09-20 13:45:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:30,911 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 179 transitions. [2024-09-20 13:45:30,911 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 15 states have internal predecessors, (52), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-20 13:45:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 179 transitions. [2024-09-20 13:45:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 13:45:30,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:30,913 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:30,926 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 13:45:31,117 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:31,118 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:31,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash -506552652, now seen corresponding path program 1 times [2024-09-20 13:45:31,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:31,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156135770] [2024-09-20 13:45:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:31,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 13:45:31,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:31,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156135770] [2024-09-20 13:45:31,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156135770] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:31,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979008189] [2024-09-20 13:45:31,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:31,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:31,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:31,329 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:31,330 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:45:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:31,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 13:45:31,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-20 13:45:31,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 13:45:31,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979008189] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:31,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:31,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2024-09-20 13:45:31,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682267909] [2024-09-20 13:45:31,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:31,797 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 13:45:31,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:31,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 13:45:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-09-20 13:45:31,799 INFO L87 Difference]: Start difference. First operand 120 states and 179 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 13:45:31,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:31,882 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2024-09-20 13:45:31,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 13:45:31,883 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2024-09-20 13:45:31,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:31,884 INFO L225 Difference]: With dead ends: 144 [2024-09-20 13:45:31,884 INFO L226 Difference]: Without dead ends: 121 [2024-09-20 13:45:31,884 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:45:31,885 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:31,885 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 73 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:31,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-20 13:45:31,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 100. [2024-09-20 13:45:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 65 states have internal predecessors, (75), 20 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (34), 28 states have call predecessors, (34), 20 states have call successors, (34) [2024-09-20 13:45:31,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2024-09-20 13:45:31,893 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 44 [2024-09-20 13:45:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:31,894 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2024-09-20 13:45:31,894 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 13:45:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2024-09-20 13:45:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 13:45:31,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:31,896 INFO L216 NwaCegarLoop]: trace histogram [10, 7, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:31,913 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 13:45:32,100 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:32,101 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:32,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:32,101 INFO L85 PathProgramCache]: Analyzing trace with hash -585932244, now seen corresponding path program 3 times [2024-09-20 13:45:32,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:32,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781242776] [2024-09-20 13:45:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:32,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:32,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 13:45:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:32,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:32,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:33,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:33,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:33,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:33,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:33,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:33,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-20 13:45:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 36 proven. 71 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 13:45:33,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:33,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781242776] [2024-09-20 13:45:33,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781242776] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:33,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363653960] [2024-09-20 13:45:33,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:45:33,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:33,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:33,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:33,202 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:45:33,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-20 13:45:33,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:33,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-20 13:45:33,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-09-20 13:45:33,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-20 13:45:35,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363653960] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:35,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:35,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 25] total 47 [2024-09-20 13:45:35,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323923034] [2024-09-20 13:45:35,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:35,573 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 13:45:35,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:35,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 13:45:35,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 13:45:35,585 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand has 48 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 40 states have internal predecessors, (76), 17 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-20 13:45:37,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:37,234 INFO L93 Difference]: Finished difference Result 152 states and 224 transitions. [2024-09-20 13:45:37,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 13:45:37,234 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 40 states have internal predecessors, (76), 17 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) Word has length 61 [2024-09-20 13:45:37,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:37,236 INFO L225 Difference]: With dead ends: 152 [2024-09-20 13:45:37,236 INFO L226 Difference]: Without dead ends: 144 [2024-09-20 13:45:37,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=796, Invalid=4460, Unknown=0, NotChecked=0, Total=5256 [2024-09-20 13:45:37,237 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:37,237 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 109 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 13:45:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-20 13:45:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2024-09-20 13:45:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.125) internal successors, (81), 71 states have internal predecessors, (81), 22 states have call successors, (22), 6 states have call predecessors, (22), 14 states have return successors, (40), 32 states have call predecessors, (40), 22 states have call successors, (40) [2024-09-20 13:45:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2024-09-20 13:45:37,246 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 61 [2024-09-20 13:45:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:37,246 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2024-09-20 13:45:37,246 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 40 states have internal predecessors, (76), 17 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-20 13:45:37,247 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2024-09-20 13:45:37,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 13:45:37,248 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:37,248 INFO L216 NwaCegarLoop]: trace histogram [10, 7, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-20 13:45:37,261 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 13:45:37,452 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 13:45:37,453 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:37,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:37,453 INFO L85 PathProgramCache]: Analyzing trace with hash -704301563, now seen corresponding path program 4 times [2024-09-20 13:45:37,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887436984] [2024-09-20 13:45:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:37,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 13:45:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:37,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:37,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:37,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:37,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:37,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:37,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:37,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 13:45:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:37,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:37,756 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 43 proven. 40 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-20 13:45:37,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887436984] [2024-09-20 13:45:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887436984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16069657] [2024-09-20 13:45:37,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:45:37,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:37,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:37,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:37,776 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:45:37,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:45:37,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:37,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 13:45:37,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 47 proven. 59 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-20 13:45:37,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 47 proven. 61 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-09-20 13:45:38,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16069657] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:38,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:38,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 31 [2024-09-20 13:45:38,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447162983] [2024-09-20 13:45:38,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:38,257 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 13:45:38,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:38,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 13:45:38,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2024-09-20 13:45:38,258 INFO L87 Difference]: Start difference. First operand 110 states and 143 transitions. Second operand has 31 states, 25 states have (on average 2.48) internal successors, (62), 28 states have internal predecessors, (62), 11 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 13:45:38,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:38,721 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2024-09-20 13:45:38,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 13:45:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.48) internal successors, (62), 28 states have internal predecessors, (62), 11 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) Word has length 62 [2024-09-20 13:45:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:38,723 INFO L225 Difference]: With dead ends: 134 [2024-09-20 13:45:38,723 INFO L226 Difference]: Without dead ends: 125 [2024-09-20 13:45:38,724 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=492, Invalid=2160, Unknown=0, NotChecked=0, Total=2652 [2024-09-20 13:45:38,724 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:38,724 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 91 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:45:38,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-20 13:45:38,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2024-09-20 13:45:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 22 states have call successors, (22), 6 states have call predecessors, (22), 14 states have return successors, (38), 31 states have call predecessors, (38), 21 states have call successors, (38) [2024-09-20 13:45:38,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2024-09-20 13:45:38,730 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 62 [2024-09-20 13:45:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:38,731 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2024-09-20 13:45:38,731 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.48) internal successors, (62), 28 states have internal predecessors, (62), 11 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 13:45:38,731 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2024-09-20 13:45:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 13:45:38,732 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:38,733 INFO L216 NwaCegarLoop]: trace histogram [11, 9, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-09-20 13:45:38,746 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 13:45:38,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:38,937 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:38,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash 258141017, now seen corresponding path program 5 times [2024-09-20 13:45:38,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:38,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025817306] [2024-09-20 13:45:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:38,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:45:39,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 13:45:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 59 proven. 78 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-09-20 13:45:39,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:39,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025817306] [2024-09-20 13:45:39,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025817306] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:39,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835422386] [2024-09-20 13:45:39,345 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:45:39,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:39,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:39,348 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:39,352 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:45:39,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 13:45:39,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:39,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 13:45:39,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 59 proven. 71 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-20 13:45:39,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 77 proven. 61 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-20 13:45:40,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835422386] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:40,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:40,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 16] total 28 [2024-09-20 13:45:40,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413225626] [2024-09-20 13:45:40,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:40,152 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 13:45:40,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:40,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 13:45:40,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2024-09-20 13:45:40,153 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 12 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:45:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:40,561 INFO L93 Difference]: Finished difference Result 126 states and 162 transitions. [2024-09-20 13:45:40,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 13:45:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 12 states have call predecessors, (18), 10 states have call successors, (18) Word has length 71 [2024-09-20 13:45:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:40,563 INFO L225 Difference]: With dead ends: 126 [2024-09-20 13:45:40,563 INFO L226 Difference]: Without dead ends: 121 [2024-09-20 13:45:40,563 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=366, Invalid=1704, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 13:45:40,564 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:40,564 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 86 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:45:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-20 13:45:40,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2024-09-20 13:45:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 22 states have call successors, (22), 6 states have call predecessors, (22), 14 states have return successors, (37), 31 states have call predecessors, (37), 21 states have call successors, (37) [2024-09-20 13:45:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2024-09-20 13:45:40,570 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 71 [2024-09-20 13:45:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:40,570 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2024-09-20 13:45:40,570 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 12 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:45:40,571 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2024-09-20 13:45:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-20 13:45:40,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:40,573 INFO L216 NwaCegarLoop]: trace histogram [15, 13, 9, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-09-20 13:45:40,587 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 13:45:40,776 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:40,777 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:40,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:40,777 INFO L85 PathProgramCache]: Analyzing trace with hash 400355383, now seen corresponding path program 6 times [2024-09-20 13:45:40,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:40,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379231730] [2024-09-20 13:45:40,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:40,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 13:45:41,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-20 13:45:41,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:41,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:41,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:41,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:42,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:42,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:42,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:45:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 69 proven. 234 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-09-20 13:45:42,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:42,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379231730] [2024-09-20 13:45:42,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379231730] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:42,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000948886] [2024-09-20 13:45:42,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:45:42,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:42,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:42,091 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:42,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:45:42,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-20 13:45:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:42,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-20 13:45:42,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 98 proven. 197 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-20 13:45:42,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:43,680 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 102 proven. 214 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-09-20 13:45:43,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000948886] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:43,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:43,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 31] total 46 [2024-09-20 13:45:43,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531501303] [2024-09-20 13:45:43,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:43,682 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 13:45:43,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:43,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 13:45:43,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 13:45:43,683 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand has 47 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 16 states have call successors, (21), 1 states have call predecessors, (21), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) [2024-09-20 13:45:51,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:51,457 INFO L93 Difference]: Finished difference Result 375 states and 667 transitions. [2024-09-20 13:45:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-09-20 13:45:51,458 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 16 states have call successors, (21), 1 states have call predecessors, (21), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) Word has length 97 [2024-09-20 13:45:51,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:51,460 INFO L225 Difference]: With dead ends: 375 [2024-09-20 13:45:51,460 INFO L226 Difference]: Without dead ends: 348 [2024-09-20 13:45:51,465 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 213 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7686 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4772, Invalid=23620, Unknown=0, NotChecked=0, Total=28392 [2024-09-20 13:45:51,466 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 259 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4047 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 4516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 4047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:51,466 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 257 Invalid, 4516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 4047 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-20 13:45:51,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-20 13:45:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 199. [2024-09-20 13:45:51,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 126 states have internal predecessors, (155), 37 states have call successors, (37), 11 states have call predecessors, (37), 25 states have return successors, (137), 61 states have call predecessors, (137), 35 states have call successors, (137) [2024-09-20 13:45:51,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 329 transitions. [2024-09-20 13:45:51,479 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 329 transitions. Word has length 97 [2024-09-20 13:45:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:51,480 INFO L474 AbstractCegarLoop]: Abstraction has 199 states and 329 transitions. [2024-09-20 13:45:51,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 16 states have call successors, (21), 1 states have call predecessors, (21), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) [2024-09-20 13:45:51,480 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 329 transitions. [2024-09-20 13:45:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-20 13:45:51,481 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:51,481 INFO L216 NwaCegarLoop]: trace histogram [19, 15, 12, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 3, 3, 1, 1, 1, 1, 1] [2024-09-20 13:45:51,494 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 13:45:51,685 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 13:45:51,685 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:51,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:51,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1237629466, now seen corresponding path program 7 times [2024-09-20 13:45:51,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:51,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659314184] [2024-09-20 13:45:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:51,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:51,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:51,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-20 13:45:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:51,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:51,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:51,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:51,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:51,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-20 13:45:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:52,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:45:52,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:45:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,080 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 48 proven. 348 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-09-20 13:45:52,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:52,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659314184] [2024-09-20 13:45:52,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659314184] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:52,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511030947] [2024-09-20 13:45:52,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:45:52,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:52,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:52,082 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:52,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 13:45:52,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 13:45:52,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 385 proven. 66 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-09-20 13:45:52,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:52,843 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 54 proven. 347 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2024-09-20 13:45:52,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511030947] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:52,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:52,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 19 [2024-09-20 13:45:52,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380903794] [2024-09-20 13:45:52,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:52,845 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 13:45:52,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:52,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 13:45:52,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-09-20 13:45:52,845 INFO L87 Difference]: Start difference. First operand 199 states and 329 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 16 states have internal predecessors, (60), 11 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 4 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-20 13:45:53,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:53,093 INFO L93 Difference]: Finished difference Result 256 states and 404 transitions. [2024-09-20 13:45:53,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 13:45:53,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 16 states have internal predecessors, (60), 11 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 4 states have call predecessors, (18), 8 states have call successors, (18) Word has length 118 [2024-09-20 13:45:53,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:53,095 INFO L225 Difference]: With dead ends: 256 [2024-09-20 13:45:53,095 INFO L226 Difference]: Without dead ends: 251 [2024-09-20 13:45:53,095 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 252 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2024-09-20 13:45:53,096 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 114 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:53,096 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 151 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:45:53,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-20 13:45:53,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 231. [2024-09-20 13:45:53,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 153 states have (on average 1.1437908496732025) internal successors, (175), 150 states have internal predecessors, (175), 48 states have call successors, (48), 17 states have call predecessors, (48), 28 states have return successors, (147), 63 states have call predecessors, (147), 46 states have call successors, (147) [2024-09-20 13:45:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 370 transitions. [2024-09-20 13:45:53,104 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 370 transitions. Word has length 118 [2024-09-20 13:45:53,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:53,104 INFO L474 AbstractCegarLoop]: Abstraction has 231 states and 370 transitions. [2024-09-20 13:45:53,104 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 16 states have internal predecessors, (60), 11 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (18), 4 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-20 13:45:53,104 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 370 transitions. [2024-09-20 13:45:53,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-20 13:45:53,105 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:53,105 INFO L216 NwaCegarLoop]: trace histogram [14, 11, 8, 7, 7, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:53,123 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-20 13:45:53,306 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 13:45:53,306 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:53,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:53,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1804134002, now seen corresponding path program 8 times [2024-09-20 13:45:53,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:53,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598753368] [2024-09-20 13:45:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:53,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:53,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 13:45:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:54,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:54,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:54,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:54,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:54,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:45:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:54,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:45:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:54,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:54,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:45:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:54,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:45:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:55,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-20 13:45:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 58 proven. 172 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-20 13:45:55,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:55,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598753368] [2024-09-20 13:45:55,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598753368] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:55,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621854211] [2024-09-20 13:45:55,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:45:55,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:55,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:55,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:45:55,030 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 13:45:55,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:45:55,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:55,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-20 13:45:55,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 52 proven. 166 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2024-09-20 13:45:55,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 78 proven. 210 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-20 13:45:58,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621854211] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:58,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:58,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 37] total 67 [2024-09-20 13:45:58,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093383461] [2024-09-20 13:45:58,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:58,529 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-20 13:45:58,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:58,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-20 13:45:58,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4099, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 13:45:58,531 INFO L87 Difference]: Start difference. First operand 231 states and 370 transitions. Second operand has 68 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 55 states have internal predecessors, (98), 23 states have call successors, (24), 1 states have call predecessors, (24), 18 states have return successors, (33), 24 states have call predecessors, (33), 22 states have call successors, (33) [2024-09-20 13:46:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:01,158 INFO L93 Difference]: Finished difference Result 275 states and 487 transitions. [2024-09-20 13:46:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-20 13:46:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 55 states have internal predecessors, (98), 23 states have call successors, (24), 1 states have call predecessors, (24), 18 states have return successors, (33), 24 states have call predecessors, (33), 22 states have call successors, (33) Word has length 87 [2024-09-20 13:46:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:01,160 INFO L225 Difference]: With dead ends: 275 [2024-09-20 13:46:01,160 INFO L226 Difference]: Without dead ends: 267 [2024-09-20 13:46:01,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1462, Invalid=9668, Unknown=0, NotChecked=0, Total=11130 [2024-09-20 13:46:01,163 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 255 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2295 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 2295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:01,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 201 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 2295 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 13:46:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-20 13:46:01,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2024-09-20 13:46:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 156 states have internal predecessors, (181), 50 states have call successors, (50), 17 states have call predecessors, (50), 30 states have return successors, (163), 67 states have call predecessors, (163), 48 states have call successors, (163) [2024-09-20 13:46:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 394 transitions. [2024-09-20 13:46:01,172 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 394 transitions. Word has length 87 [2024-09-20 13:46:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:01,172 INFO L474 AbstractCegarLoop]: Abstraction has 241 states and 394 transitions. [2024-09-20 13:46:01,172 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 55 states have internal predecessors, (98), 23 states have call successors, (24), 1 states have call predecessors, (24), 18 states have return successors, (33), 24 states have call predecessors, (33), 22 states have call successors, (33) [2024-09-20 13:46:01,172 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 394 transitions. [2024-09-20 13:46:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-20 13:46:01,173 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:01,174 INFO L216 NwaCegarLoop]: trace histogram [14, 11, 9, 6, 6, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-09-20 13:46:01,186 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 13:46:01,377 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 13:46:01,378 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:01,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:01,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1629749785, now seen corresponding path program 9 times [2024-09-20 13:46:01,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:01,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660455112] [2024-09-20 13:46:01,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:01,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 13:46:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 13:46:01,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 91 proven. 125 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-09-20 13:46:01,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660455112] [2024-09-20 13:46:01,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660455112] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:01,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529224046] [2024-09-20 13:46:01,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:46:01,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:01,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:01,876 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:46:01,877 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 13:46:01,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 13:46:01,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:01,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-20 13:46:01,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 91 proven. 114 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2024-09-20 13:46:02,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 107 proven. 112 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-20 13:46:02,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529224046] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:02,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:02,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 17] total 25 [2024-09-20 13:46:02,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153082] [2024-09-20 13:46:02,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:02,913 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:46:02,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:46:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:46:02,914 INFO L87 Difference]: Start difference. First operand 241 states and 394 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 11 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 13:46:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:03,294 INFO L93 Difference]: Finished difference Result 225 states and 339 transitions. [2024-09-20 13:46:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 13:46:03,294 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 11 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) Word has length 88 [2024-09-20 13:46:03,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:03,299 INFO L225 Difference]: With dead ends: 225 [2024-09-20 13:46:03,299 INFO L226 Difference]: Without dead ends: 218 [2024-09-20 13:46:03,299 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 184 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=432, Invalid=1730, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 13:46:03,300 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:03,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 86 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:46:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-20 13:46:03,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2024-09-20 13:46:03,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 125 states have (on average 1.128) internal successors, (141), 124 states have internal predecessors, (141), 40 states have call successors, (40), 14 states have call predecessors, (40), 23 states have return successors, (102), 51 states have call predecessors, (102), 39 states have call successors, (102) [2024-09-20 13:46:03,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 283 transitions. [2024-09-20 13:46:03,315 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 283 transitions. Word has length 88 [2024-09-20 13:46:03,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:03,315 INFO L474 AbstractCegarLoop]: Abstraction has 190 states and 283 transitions. [2024-09-20 13:46:03,315 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 11 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 13:46:03,315 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 283 transitions. [2024-09-20 13:46:03,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-09-20 13:46:03,320 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:03,321 INFO L216 NwaCegarLoop]: trace histogram [18, 15, 11, 8, 8, 7, 6, 6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-09-20 13:46:03,336 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 13:46:03,521 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 13:46:03,521 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:03,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:03,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1107348169, now seen corresponding path program 10 times [2024-09-20 13:46:03,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:03,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131916552] [2024-09-20 13:46:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:03,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:03,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 13:46:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:03,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:03,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:03,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 13:46:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:04,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 170 proven. 223 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2024-09-20 13:46:04,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:04,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131916552] [2024-09-20 13:46:04,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131916552] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:04,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591324766] [2024-09-20 13:46:04,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:46:04,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:04,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:04,306 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:46:04,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 13:46:04,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:46:04,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:04,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 13:46:04,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:04,568 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 173 proven. 235 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2024-09-20 13:46:04,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 173 proven. 263 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2024-09-20 13:46:05,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591324766] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:05,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:05,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 21] total 38 [2024-09-20 13:46:05,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814549344] [2024-09-20 13:46:05,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:05,610 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 13:46:05,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:05,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 13:46:05,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 13:46:05,612 INFO L87 Difference]: Start difference. First operand 190 states and 283 transitions. Second operand has 38 states, 33 states have (on average 2.696969696969697) internal successors, (89), 35 states have internal predecessors, (89), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (32), 15 states have call predecessors, (32), 20 states have call successors, (32) [2024-09-20 13:46:06,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:06,417 INFO L93 Difference]: Finished difference Result 242 states and 384 transitions. [2024-09-20 13:46:06,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 13:46:06,417 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.696969696969697) internal successors, (89), 35 states have internal predecessors, (89), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (32), 15 states have call predecessors, (32), 20 states have call successors, (32) Word has length 114 [2024-09-20 13:46:06,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:06,418 INFO L225 Difference]: With dead ends: 242 [2024-09-20 13:46:06,418 INFO L226 Difference]: Without dead ends: 242 [2024-09-20 13:46:06,419 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 241 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=649, Invalid=3133, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 13:46:06,419 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 162 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:06,420 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 205 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 13:46:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-09-20 13:46:06,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 188. [2024-09-20 13:46:06,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 123 states have (on average 1.1219512195121952) internal successors, (138), 123 states have internal predecessors, (138), 40 states have call successors, (40), 14 states have call predecessors, (40), 23 states have return successors, (99), 50 states have call predecessors, (99), 38 states have call successors, (99) [2024-09-20 13:46:06,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 277 transitions. [2024-09-20 13:46:06,427 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 277 transitions. Word has length 114 [2024-09-20 13:46:06,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:06,427 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 277 transitions. [2024-09-20 13:46:06,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.696969696969697) internal successors, (89), 35 states have internal predecessors, (89), 20 states have call successors, (24), 1 states have call predecessors, (24), 14 states have return successors, (32), 15 states have call predecessors, (32), 20 states have call successors, (32) [2024-09-20 13:46:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 277 transitions. [2024-09-20 13:46:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-20 13:46:06,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:06,431 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:46:06,448 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 13:46:06,631 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 13:46:06,632 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:06,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:06,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1149920590, now seen corresponding path program 11 times [2024-09-20 13:46:06,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:06,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76406983] [2024-09-20 13:46:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:06,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:07,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:46:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:07,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:08,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:08,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:08,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:08,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:08,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:09,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:46:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 13:46:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-20 13:46:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 117 proven. 218 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-09-20 13:46:09,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:09,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76406983] [2024-09-20 13:46:09,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76406983] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:09,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888343361] [2024-09-20 13:46:09,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:46:09,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:09,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:09,229 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:46:09,230 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 13:46:09,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-20 13:46:09,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:09,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-20 13:46:09,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 113 proven. 262 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2024-09-20 13:46:10,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 153 proven. 304 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 13:46:20,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888343361] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:20,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:20,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 49] total 110 [2024-09-20 13:46:20,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232531063] [2024-09-20 13:46:20,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:20,607 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-20 13:46:20,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:20,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-20 13:46:20,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1305, Invalid=10905, Unknown=0, NotChecked=0, Total=12210 [2024-09-20 13:46:20,614 INFO L87 Difference]: Start difference. First operand 188 states and 277 transitions. Second operand has 111 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 87 states have internal predecessors, (149), 35 states have call successors, (35), 1 states have call predecessors, (35), 33 states have return successors, (45), 45 states have call predecessors, (45), 34 states have call successors, (45) [2024-09-20 13:46:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:24,435 INFO L93 Difference]: Finished difference Result 354 states and 680 transitions. [2024-09-20 13:46:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-09-20 13:46:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 87 states have internal predecessors, (149), 35 states have call successors, (35), 1 states have call predecessors, (35), 33 states have return successors, (45), 45 states have call predecessors, (45), 34 states have call successors, (45) Word has length 105 [2024-09-20 13:46:24,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:24,438 INFO L225 Difference]: With dead ends: 354 [2024-09-20 13:46:24,438 INFO L226 Difference]: Without dead ends: 347 [2024-09-20 13:46:24,441 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 164 SyntacticMatches, 7 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9827 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4701, Invalid=26451, Unknown=0, NotChecked=0, Total=31152 [2024-09-20 13:46:24,442 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2548 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:24,443 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 148 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2548 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 13:46:24,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-09-20 13:46:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 177. [2024-09-20 13:46:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 118 states have (on average 1.0932203389830508) internal successors, (129), 116 states have internal predecessors, (129), 36 states have call successors, (36), 14 states have call predecessors, (36), 21 states have return successors, (84), 46 states have call predecessors, (84), 36 states have call successors, (84) [2024-09-20 13:46:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 249 transitions. [2024-09-20 13:46:24,454 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 249 transitions. Word has length 105 [2024-09-20 13:46:24,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:24,454 INFO L474 AbstractCegarLoop]: Abstraction has 177 states and 249 transitions. [2024-09-20 13:46:24,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 107 states have (on average 1.3925233644859814) internal successors, (149), 87 states have internal predecessors, (149), 35 states have call successors, (35), 1 states have call predecessors, (35), 33 states have return successors, (45), 45 states have call predecessors, (45), 34 states have call successors, (45) [2024-09-20 13:46:24,454 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 249 transitions. [2024-09-20 13:46:24,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-09-20 13:46:24,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:24,455 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-09-20 13:46:24,470 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 13:46:24,659 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 13:46:24,660 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:24,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:24,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1482059844, now seen corresponding path program 12 times [2024-09-20 13:46:24,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642901870] [2024-09-20 13:46:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:24,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:46:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:46:25,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-20 13:46:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:25,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 399 proven. 311 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2024-09-20 13:46:25,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642901870] [2024-09-20 13:46:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642901870] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54800738] [2024-09-20 13:46:25,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 13:46:25,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:25,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:25,852 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:46:25,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 13:46:26,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-20 13:46:26,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:26,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-09-20 13:46:26,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 297 proven. 524 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2024-09-20 13:46:26,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 312 proven. 535 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2024-09-20 13:46:30,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54800738] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:30,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:30,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 34, 50] total 94 [2024-09-20 13:46:30,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931635329] [2024-09-20 13:46:30,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:30,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-09-20 13:46:30,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:30,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-09-20 13:46:30,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=8273, Unknown=0, NotChecked=0, Total=8742 [2024-09-20 13:46:30,642 INFO L87 Difference]: Start difference. First operand 177 states and 249 transitions. Second operand has 94 states, 90 states have (on average 1.5666666666666667) internal successors, (141), 76 states have internal predecessors, (141), 30 states have call successors, (33), 2 states have call predecessors, (33), 34 states have return successors, (52), 42 states have call predecessors, (52), 29 states have call successors, (52) [2024-09-20 13:46:37,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:37,002 INFO L93 Difference]: Finished difference Result 275 states and 391 transitions. [2024-09-20 13:46:37,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-09-20 13:46:37,003 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 90 states have (on average 1.5666666666666667) internal successors, (141), 76 states have internal predecessors, (141), 30 states have call successors, (33), 2 states have call predecessors, (33), 34 states have return successors, (52), 42 states have call predecessors, (52), 29 states have call successors, (52) Word has length 152 [2024-09-20 13:46:37,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:37,004 INFO L225 Difference]: With dead ends: 275 [2024-09-20 13:46:37,004 INFO L226 Difference]: Without dead ends: 258 [2024-09-20 13:46:37,007 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 280 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9714 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4157, Invalid=30253, Unknown=0, NotChecked=0, Total=34410 [2024-09-20 13:46:37,007 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 321 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3951 mSolverCounterSat, 555 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 4506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 555 IncrementalHoareTripleChecker+Valid, 3951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:37,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 209 Invalid, 4506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [555 Valid, 3951 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 13:46:37,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-09-20 13:46:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 210. [2024-09-20 13:46:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 139 states have (on average 1.079136690647482) internal successors, (150), 139 states have internal predecessors, (150), 41 states have call successors, (41), 18 states have call predecessors, (41), 28 states have return successors, (98), 52 states have call predecessors, (98), 41 states have call successors, (98) [2024-09-20 13:46:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 289 transitions. [2024-09-20 13:46:37,013 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 289 transitions. Word has length 152 [2024-09-20 13:46:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:37,014 INFO L474 AbstractCegarLoop]: Abstraction has 210 states and 289 transitions. [2024-09-20 13:46:37,014 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 90 states have (on average 1.5666666666666667) internal successors, (141), 76 states have internal predecessors, (141), 30 states have call successors, (33), 2 states have call predecessors, (33), 34 states have return successors, (52), 42 states have call predecessors, (52), 29 states have call successors, (52) [2024-09-20 13:46:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 289 transitions. [2024-09-20 13:46:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-20 13:46:37,015 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:37,015 INFO L216 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:46:37,034 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 13:46:37,219 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:37,219 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:37,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:37,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1950095843, now seen corresponding path program 2 times [2024-09-20 13:46:37,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:37,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507163506] [2024-09-20 13:46:37,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:37,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:37,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:46:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:38,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 13:46:38,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:38,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:38,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:39,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:39,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:46:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:39,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 163 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2024-09-20 13:46:39,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:39,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507163506] [2024-09-20 13:46:39,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507163506] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:39,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147515819] [2024-09-20 13:46:39,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:46:39,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:39,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:39,055 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:46:39,056 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 13:46:39,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-20 13:46:39,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:39,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 13:46:39,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 1715 trivial. 0 not checked. [2024-09-20 13:46:39,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:46:39,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147515819] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:46:39,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:46:39,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [25] total 28 [2024-09-20 13:46:39,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577874704] [2024-09-20 13:46:39,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:46:39,566 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:46:39,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:46:39,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2024-09-20 13:46:39,567 INFO L87 Difference]: Start difference. First operand 210 states and 289 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 13:46:39,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:39,607 INFO L93 Difference]: Finished difference Result 208 states and 287 transitions. [2024-09-20 13:46:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:46:39,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 182 [2024-09-20 13:46:39,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:39,612 INFO L225 Difference]: With dead ends: 208 [2024-09-20 13:46:39,612 INFO L226 Difference]: Without dead ends: 193 [2024-09-20 13:46:39,613 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2024-09-20 13:46:39,615 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:39,615 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:46:39,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-20 13:46:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2024-09-20 13:46:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 123 states have internal predecessors, (129), 36 states have call successors, (36), 18 states have call predecessors, (36), 25 states have return successors, (68), 41 states have call predecessors, (68), 35 states have call successors, (68) [2024-09-20 13:46:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 233 transitions. [2024-09-20 13:46:39,623 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 233 transitions. Word has length 182 [2024-09-20 13:46:39,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:39,623 INFO L474 AbstractCegarLoop]: Abstraction has 183 states and 233 transitions. [2024-09-20 13:46:39,624 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 13:46:39,624 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 233 transitions. [2024-09-20 13:46:39,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-09-20 13:46:39,625 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:39,625 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 15, 11, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2024-09-20 13:46:39,637 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-20 13:46:39,829 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:39,830 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:39,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:39,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1306550061, now seen corresponding path program 13 times [2024-09-20 13:46:39,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:39,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112960849] [2024-09-20 13:46:39,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:39,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:46:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:46:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 13:46:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:40,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 488 proven. 432 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-09-20 13:46:41,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:41,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112960849] [2024-09-20 13:46:41,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112960849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:41,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766127730] [2024-09-20 13:46:41,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 13:46:41,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:41,049 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:46:41,051 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 13:46:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:41,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 13:46:41,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 488 proven. 401 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2024-09-20 13:46:41,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 544 proven. 405 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2024-09-20 13:46:44,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766127730] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:44,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:44,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 29] total 37 [2024-09-20 13:46:44,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376125703] [2024-09-20 13:46:44,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:44,439 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 13:46:44,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:44,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 13:46:44,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 13:46:44,440 INFO L87 Difference]: Start difference. First operand 183 states and 233 transitions. Second operand has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 32 states have internal predecessors, (82), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (37), 17 states have call predecessors, (37), 17 states have call successors, (37) [2024-09-20 13:46:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:45,047 INFO L93 Difference]: Finished difference Result 209 states and 262 transitions. [2024-09-20 13:46:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-20 13:46:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 32 states have internal predecessors, (82), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (37), 17 states have call predecessors, (37), 17 states have call successors, (37) Word has length 172 [2024-09-20 13:46:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:45,048 INFO L225 Difference]: With dead ends: 209 [2024-09-20 13:46:45,048 INFO L226 Difference]: Without dead ends: 189 [2024-09-20 13:46:45,049 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 364 SyntacticMatches, 25 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=984, Invalid=4128, Unknown=0, NotChecked=0, Total=5112 [2024-09-20 13:46:45,050 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:45,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 64 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:46:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-09-20 13:46:45,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2024-09-20 13:46:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 115 states have internal predecessors, (120), 33 states have call successors, (33), 17 states have call predecessors, (33), 24 states have return successors, (53), 37 states have call predecessors, (53), 32 states have call successors, (53) [2024-09-20 13:46:45,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions. [2024-09-20 13:46:45,054 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 172 [2024-09-20 13:46:45,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:45,055 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 206 transitions. [2024-09-20 13:46:45,055 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 32 states have internal predecessors, (82), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (37), 17 states have call predecessors, (37), 17 states have call successors, (37) [2024-09-20 13:46:45,055 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions. [2024-09-20 13:46:45,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2024-09-20 13:46:45,059 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:45,059 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 16, 12, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2024-09-20 13:46:45,073 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 13:46:45,260 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:45,260 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:45,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash 920689794, now seen corresponding path program 14 times [2024-09-20 13:46:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:45,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736449211] [2024-09-20 13:46:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:45,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:46:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:46:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:45,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:45,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:45,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:45,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 13:46:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:46,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:46,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:46,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:46:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:46,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 451 proven. 500 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-09-20 13:46:46,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:46,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736449211] [2024-09-20 13:46:46,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736449211] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:46,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462758632] [2024-09-20 13:46:46,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:46:46,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:46,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:46,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:46:46,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 13:46:46,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:46:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:46:46,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 13:46:46,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:46:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 455 proven. 561 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2024-09-20 13:46:46,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:46:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 455 proven. 592 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2024-09-20 13:46:48,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462758632] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:46:48,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:46:48,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 20 [2024-09-20 13:46:48,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349509046] [2024-09-20 13:46:48,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:46:48,512 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 13:46:48,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:46:48,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 13:46:48,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:46:48,512 INFO L87 Difference]: Start difference. First operand 170 states and 206 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 12 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (29), 7 states have call predecessors, (29), 12 states have call successors, (29) [2024-09-20 13:46:48,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:46:48,646 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2024-09-20 13:46:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 13:46:48,647 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 12 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (29), 7 states have call predecessors, (29), 12 states have call successors, (29) Word has length 185 [2024-09-20 13:46:48,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:46:48,649 INFO L225 Difference]: With dead ends: 165 [2024-09-20 13:46:48,649 INFO L226 Difference]: Without dead ends: 165 [2024-09-20 13:46:48,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 407 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2024-09-20 13:46:48,649 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 51 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:46:48,650 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 120 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:46:48,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-20 13:46:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-09-20 13:46:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 109 states have (on average 1.055045871559633) internal successors, (115), 112 states have internal predecessors, (115), 32 states have call successors, (32), 17 states have call predecessors, (32), 23 states have return successors, (41), 35 states have call predecessors, (41), 31 states have call successors, (41) [2024-09-20 13:46:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2024-09-20 13:46:48,653 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 185 [2024-09-20 13:46:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:46:48,653 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2024-09-20 13:46:48,654 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 states have internal predecessors, (67), 12 states have call successors, (21), 1 states have call predecessors, (21), 8 states have return successors, (29), 7 states have call predecessors, (29), 12 states have call successors, (29) [2024-09-20 13:46:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2024-09-20 13:46:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2024-09-20 13:46:48,655 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:46:48,656 INFO L216 NwaCegarLoop]: trace histogram [82, 81, 46, 36, 35, 35, 35, 35, 35, 35, 35, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2024-09-20 13:46:48,671 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-20 13:46:48,859 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 13:46:48,860 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:46:48,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:46:48,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1286461764, now seen corresponding path program 15 times [2024-09-20 13:46:48,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:46:48,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918284284] [2024-09-20 13:46:48,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:46:48,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:46:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 13:46:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:50,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:50,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:46:50,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:50,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:50,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:50,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-20 13:46:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:54,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:56,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:56,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:57,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:46:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 13:46:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:58,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:46:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-20 13:46:58,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:58,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:46:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2024-09-20 13:46:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:59,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:59,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:46:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2024-09-20 13:46:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:46:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:46:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:46:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:46:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:46:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:46:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:46:59,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16728 backedges. 5729 proven. 2603 refuted. 0 times theorem prover too weak. 8396 trivial. 0 not checked. [2024-09-20 13:46:59,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:46:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918284284] [2024-09-20 13:46:59,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918284284] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:46:59,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119514364] [2024-09-20 13:46:59,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:46:59,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:46:59,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:46:59,722 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:46:59,723 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 13:47:00,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-20 13:47:00,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:47:00,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-09-20 13:47:00,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:47:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16728 backedges. 4577 proven. 822 refuted. 0 times theorem prover too weak. 11329 trivial. 0 not checked. [2024-09-20 13:47:00,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:47:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16728 backedges. 4200 proven. 692 refuted. 0 times theorem prover too weak. 11836 trivial. 0 not checked. [2024-09-20 13:47:02,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119514364] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:47:02,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:47:02,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 23, 23] total 68 [2024-09-20 13:47:02,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501913182] [2024-09-20 13:47:02,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:47:02,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-20 13:47:02,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:47:02,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-20 13:47:02,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=4158, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 13:47:02,723 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand has 68 states, 64 states have (on average 1.96875) internal successors, (126), 58 states have internal predecessors, (126), 34 states have call successors, (37), 1 states have call predecessors, (37), 30 states have return successors, (66), 38 states have call predecessors, (66), 34 states have call successors, (66) [2024-09-20 13:47:05,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:47:05,124 INFO L93 Difference]: Finished difference Result 219 states and 259 transitions. [2024-09-20 13:47:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-20 13:47:05,124 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 64 states have (on average 1.96875) internal successors, (126), 58 states have internal predecessors, (126), 34 states have call successors, (37), 1 states have call predecessors, (37), 30 states have return successors, (66), 38 states have call predecessors, (66), 34 states have call successors, (66) Word has length 539 [2024-09-20 13:47:05,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:47:05,126 INFO L225 Difference]: With dead ends: 219 [2024-09-20 13:47:05,126 INFO L226 Difference]: Without dead ends: 219 [2024-09-20 13:47:05,128 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 1230 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4927 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2486, Invalid=16420, Unknown=0, NotChecked=0, Total=18906 [2024-09-20 13:47:05,129 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 182 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 2213 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 2213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 13:47:05,129 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 88 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 13:47:05,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-20 13:47:05,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 191. [2024-09-20 13:47:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 125 states have (on average 1.048) internal successors, (131), 128 states have internal predecessors, (131), 38 states have call successors, (38), 18 states have call predecessors, (38), 27 states have return successors, (54), 44 states have call predecessors, (54), 37 states have call successors, (54) [2024-09-20 13:47:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 223 transitions. [2024-09-20 13:47:05,134 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 223 transitions. Word has length 539 [2024-09-20 13:47:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:47:05,135 INFO L474 AbstractCegarLoop]: Abstraction has 191 states and 223 transitions. [2024-09-20 13:47:05,135 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 64 states have (on average 1.96875) internal successors, (126), 58 states have internal predecessors, (126), 34 states have call successors, (37), 1 states have call predecessors, (37), 30 states have return successors, (66), 38 states have call predecessors, (66), 34 states have call successors, (66) [2024-09-20 13:47:05,135 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 223 transitions. [2024-09-20 13:47:05,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2024-09-20 13:47:05,137 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:47:05,138 INFO L216 NwaCegarLoop]: trace histogram [90, 87, 51, 40, 40, 39, 38, 38, 38, 38, 38, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2024-09-20 13:47:05,154 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 13:47:05,338 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 13:47:05,338 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:47:05,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:47:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2030147053, now seen corresponding path program 16 times [2024-09-20 13:47:05,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:47:05,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716094169] [2024-09-20 13:47:05,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:47:05,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:47:05,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-20 13:47:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:07,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:47:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:47:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:07,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:47:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:47:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:47:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:07,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-20 13:47:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:09,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:09,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:10,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:47:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:47:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:47:11,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:47:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:47:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-20 13:47:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:11,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:47:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:47:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:47:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:47:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:47:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-20 13:47:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:47:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:47:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:47:12,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:47:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:47:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 13:47:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2024-09-20 13:47:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:47:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:47:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:47:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:47:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:47:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 13:47:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:12,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2024-09-20 13:47:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:47:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-20 13:47:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:47:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-20 13:47:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-20 13:47:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-20 13:47:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-20 13:47:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:47:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19853 backedges. 3348 proven. 3066 refuted. 0 times theorem prover too weak. 13439 trivial. 0 not checked. [2024-09-20 13:47:13,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:47:13,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716094169] [2024-09-20 13:47:13,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716094169] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:47:13,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702468283] [2024-09-20 13:47:13,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:47:13,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:47:13,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:47:13,063 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:47:13,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 13:47:13,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:47:13,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:47:13,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 1694 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-09-20 13:47:13,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:47:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 19853 backedges. 4047 proven. 4609 refuted. 0 times theorem prover too weak. 11197 trivial. 0 not checked. [2024-09-20 13:47:13,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:47:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 19853 backedges. 4084 proven. 4964 refuted. 0 times theorem prover too weak. 10805 trivial. 0 not checked. [2024-09-20 13:47:17,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702468283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:47:17,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:47:17,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20, 31] total 66 [2024-09-20 13:47:17,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518515399] [2024-09-20 13:47:17,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:47:17,215 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-20 13:47:17,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:47:17,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-20 13:47:17,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3977, Unknown=0, NotChecked=0, Total=4290 [2024-09-20 13:47:17,216 INFO L87 Difference]: Start difference. First operand 191 states and 223 transitions. Second operand has 66 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 60 states have internal predecessors, (153), 43 states have call successors, (49), 1 states have call predecessors, (49), 31 states have return successors, (79), 37 states have call predecessors, (79), 43 states have call successors, (79) [2024-09-20 13:47:19,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:47:19,910 INFO L93 Difference]: Finished difference Result 230 states and 271 transitions. [2024-09-20 13:47:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-09-20 13:47:19,914 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 60 states have internal predecessors, (153), 43 states have call successors, (49), 1 states have call predecessors, (49), 31 states have return successors, (79), 37 states have call predecessors, (79), 43 states have call successors, (79) Word has length 586 [2024-09-20 13:47:19,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:47:19,915 INFO L225 Difference]: With dead ends: 230 [2024-09-20 13:47:19,915 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 13:47:19,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1475 GetRequests, 1323 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5442 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3355, Invalid=19901, Unknown=0, NotChecked=0, Total=23256 [2024-09-20 13:47:19,917 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 366 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 3948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:47:19,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 115 Invalid, 3948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 13:47:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 13:47:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 13:47:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:47:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 13:47:19,921 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 586 [2024-09-20 13:47:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:47:19,921 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 13:47:19,922 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 61 states have (on average 2.5081967213114753) internal successors, (153), 60 states have internal predecessors, (153), 43 states have call successors, (49), 1 states have call predecessors, (49), 31 states have return successors, (79), 37 states have call predecessors, (79), 43 states have call successors, (79) [2024-09-20 13:47:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 13:47:19,922 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 13:47:19,924 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-20 13:47:19,924 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ackermannErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-20 13:47:19,947 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 13:47:20,130 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 13:47:20,133 INFO L408 BasicCegarLoop]: Path program histogram: [16, 2, 1, 1, 1, 1, 1, 1] [2024-09-20 13:47:20,135 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 13:47:20,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:47:20 BoogieIcfgContainer [2024-09-20 13:47:20,136 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 13:47:20,137 INFO L158 Benchmark]: Toolchain (without parser) took 119171.45ms. Allocated memory was 176.2MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 116.1MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 132.3MB. Max. memory is 16.1GB. [2024-09-20 13:47:20,137 INFO L158 Benchmark]: Witness Parser took 0.46ms. Allocated memory is still 176.2MB. Free memory is still 136.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:47:20,137 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 176.2MB. Free memory is still 134.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:47:20,137 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.90ms. Allocated memory is still 176.2MB. Free memory was 116.1MB in the beginning and 103.0MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-20 13:47:20,137 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.59ms. Allocated memory is still 176.2MB. Free memory was 103.0MB in the beginning and 101.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:47:20,137 INFO L158 Benchmark]: Boogie Preprocessor took 42.07ms. Allocated memory is still 176.2MB. Free memory was 101.4MB in the beginning and 99.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:47:20,138 INFO L158 Benchmark]: RCFGBuilder took 267.00ms. Allocated memory is still 176.2MB. Free memory was 99.8MB in the beginning and 83.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-09-20 13:47:20,138 INFO L158 Benchmark]: TraceAbstraction took 118598.75ms. Allocated memory was 176.2MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 82.6MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 98.7MB. Max. memory is 16.1GB. [2024-09-20 13:47:20,138 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 0.46ms. Allocated memory is still 176.2MB. Free memory is still 136.9MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 176.2MB. Free memory is still 134.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.90ms. Allocated memory is still 176.2MB. Free memory was 116.1MB in the beginning and 103.0MB in the end (delta: 13.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 23.59ms. Allocated memory is still 176.2MB. Free memory was 103.0MB in the beginning and 101.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.07ms. Allocated memory is still 176.2MB. Free memory was 101.4MB in the beginning and 99.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 267.00ms. Allocated memory is still 176.2MB. Free memory was 99.8MB in the beginning and 83.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 118598.75ms. Allocated memory was 176.2MB in the beginning and 1.8GB in the end (delta: 1.6GB). Free memory was 82.6MB in the beginning and 1.6GB in the end (delta: -1.5GB). Peak memory consumption was 98.7MB. 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: 118.6s, OverallIterations: 24, TraceHistogramMax: 90, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 33.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2561 SdHoareTripleChecker+Valid, 11.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2471 mSDsluCounter, 2624 SdHoareTripleChecker+Invalid, 9.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2147 mSDsCounter, 3243 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25214 IncrementalHoareTripleChecker+Invalid, 28457 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3243 mSolverCounterUnsat, 477 mSDtfsCounter, 25214 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7361 GetRequests, 5771 SyntacticMatches, 108 SemanticMatches, 1482 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45685 ImplicationChecksByTransitivity, 35.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=241occurred in iteration=15, InterpolantAutomatonStates: 827, 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, 24 MinimizatonAttempts, 740 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 77.1s InterpolantComputationTime, 5610 NumberOfCodeBlocks, 4902 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 8150 ConstructedInterpolants, 0 QuantifiedInterpolants, 26480 SizeOfPredicates, 163 NumberOfNonLiveVariables, 7327 ConjunctsInSsa, 980 ConjunctsInUnsatCore, 63 InterpolantComputations, 5 PerfectInterpolantSequences, 113412/139260 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-20 13:47:20,163 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...