This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 10:27:15,539 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:27:15,616 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:27:15,622 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:27:15,623 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:27:15,653 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:27:15,655 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:27:15,655 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:27:15,656 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:27:15,656 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:27:15,657 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:27:15,657 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:27:15,657 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:27:15,658 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:27:15,659 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:27:15,660 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:27:15,661 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:27:15,662 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:27:15,663 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:27:15,663 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:27:15,663 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:27:15,664 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:27:15,665 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:27:15,665 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:27:15,665 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:27:15,666 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:27:15,666 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:27:15,666 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:27:15,666 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:27:15,667 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:27:15,667 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:27:15,667 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:27:15,667 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:15,668 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:27:15,668 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:27:15,668 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:27:15,669 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:27:15,669 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:27:15,669 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:27:15,669 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:27:15,670 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:27:15,670 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:27:15,670 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 10:27:15,919 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:27:15,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:27:15,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:27:15,950 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 10:27:15,951 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 10:27:15,952 INFO L431 ainManager$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 [2024-09-13 10:27:16,007 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:27:16,007 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:27:16,007 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/Ackermann03.c [2024-09-13 10:27:17,448 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:27:17,640 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:27:17,640 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann03.c [2024-09-13 10:27:17,646 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2781384c6/54c996375641405593d7b9d5f7e25c4d/FLAG69ecf13e9 [2024-09-13 10:27:18,044 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2781384c6/54c996375641405593d7b9d5f7e25c4d [2024-09-13 10:27:18,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:27:18,046 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 10:27:18,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:18,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:27:18,055 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:27:18,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:27:16" (1/2) ... [2024-09-13 10:27:18,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f218207 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:18, skipping insertion in model container [2024-09-13 10:27:18,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:27:16" (1/2) ... [2024-09-13 10:27:18,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@701c24be and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:27:18, skipping insertion in model container [2024-09-13 10:27:18,058 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:18" (2/2) ... [2024-09-13 10:27:18,058 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f218207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18, skipping insertion in model container [2024-09-13 10:27:18,058 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:27:18" (2/2) ... [2024-09-13 10:27:18,063 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 10:27:18,068 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)))) [2024-09-13 10:27:18,086 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:27:18,223 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2024-09-13 10:27:18,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:18,237 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-13 10:27:18,304 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2024-09-13 10:27:18,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:27:18,327 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:27:18,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18 WrapperNode [2024-09-13 10:27:18,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:27:18,331 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:18,332 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:27:18,332 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:27:18,339 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,346 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,363 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-09-13 10:27:18,363 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:27:18,364 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:27:18,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:27:18,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:27:18,374 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,377 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,391 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure ackermann is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-13 10:27:18,392 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,392 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,396 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,401 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,402 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,403 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,405 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:27:18,406 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:27:18,406 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:27:18,406 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:27:18,407 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (1/1) ... [2024-09-13 10:27:18,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:27:18,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:18,431 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 10:27:18,434 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 10:27:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:27:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:27:18,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:27:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-09-13 10:27:18,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-09-13 10:27:18,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 10:27:18,533 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:27:18,535 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:27:18,742 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-13 10:27:18,742 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:27:18,783 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:27:18,783 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-13 10:27:18,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:27:18 BoogieIcfgContainer [2024-09-13 10:27:18,783 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:27:18,785 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:27:18,785 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:27:18,794 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:27:18,795 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:27:16" (1/4) ... [2024-09-13 10:27:18,807 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd19663 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:27:18, skipping insertion in model container [2024-09-13 10:27:18,807 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:27:18" (2/4) ... [2024-09-13 10:27:18,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd19663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:27:18, skipping insertion in model container [2024-09-13 10:27:18,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:27:18" (3/4) ... [2024-09-13 10:27:18,808 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fd19663 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:27:18, skipping insertion in model container [2024-09-13 10:27:18,808 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:27:18" (4/4) ... [2024-09-13 10:27:18,809 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2024-09-13 10:27:18,832 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:27:18,832 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-13 10:27:18,887 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:27:18,899 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;@119bae13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:27:18,899 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-13 10:27:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-13 10:27:18,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-09-13 10:27:18,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:18,910 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:18,911 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:18,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:18,919 INFO L85 PathProgramCache]: Analyzing trace with hash -26348941, now seen corresponding path program 1 times [2024-09-13 10:27:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:18,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097038905] [2024-09-13 10:27:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:18,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:19,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:19,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:19,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097038905] [2024-09-13 10:27:19,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097038905] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:19,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:19,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 10:27:19,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334238100] [2024-09-13 10:27:19,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:19,478 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:27:19,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:27:19,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:19,509 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:19,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:19,682 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-13 10:27:19,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 10:27:19,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-09-13 10:27:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:19,693 INFO L225 Difference]: With dead ends: 39 [2024-09-13 10:27:19,693 INFO L226 Difference]: Without dead ends: 36 [2024-09-13 10:27:19,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:27:19,700 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 [2024-09-13 10:27:19,700 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] [2024-09-13 10:27:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-13 10:27:19,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2024-09-13 10:27:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-13 10:27:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-09-13 10:27:19,747 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 7 [2024-09-13 10:27:19,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:19,747 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-09-13 10:27:19,747 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-09-13 10:27:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-13 10:27:19,749 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:19,749 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:19,750 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:27:19,750 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:19,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:19,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1506041859, now seen corresponding path program 1 times [2024-09-13 10:27:19,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:19,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431084670] [2024-09-13 10:27:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:19,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:19,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:20,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:20,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:20,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431084670] [2024-09-13 10:27:20,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431084670] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:20,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:20,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 10:27:20,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980328280] [2024-09-13 10:27:20,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:20,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:27:20,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:27:20,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:27:20,019 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:20,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:20,093 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-09-13 10:27:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:27:20,094 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-13 10:27:20,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:20,095 INFO L225 Difference]: With dead ends: 42 [2024-09-13 10:27:20,095 INFO L226 Difference]: Without dead ends: 42 [2024-09-13 10:27:20,095 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:27:20,097 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:20,098 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:27:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-13 10:27:20,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-09-13 10:27:20,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-13 10:27:20,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-09-13 10:27:20,111 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 11 [2024-09-13 10:27:20,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:20,112 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-09-13 10:27:20,114 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:27:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-09-13 10:27:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-13 10:27:20,115 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:20,115 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:20,115 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 10:27:20,116 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:20,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:20,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1508872004, now seen corresponding path program 1 times [2024-09-13 10:27:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:20,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726613604] [2024-09-13 10:27:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:20,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:20,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:20,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:20,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726613604] [2024-09-13 10:27:20,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726613604] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:20,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:20,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 10:27:20,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140431120] [2024-09-13 10:27:20,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:20,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:27:20,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:20,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:27:20,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:27:20,202 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) [2024-09-13 10:27:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:20,268 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2024-09-13 10:27:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:27:20,268 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 [2024-09-13 10:27:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:20,270 INFO L225 Difference]: With dead ends: 57 [2024-09-13 10:27:20,270 INFO L226 Difference]: Without dead ends: 57 [2024-09-13 10:27:20,271 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 [2024-09-13 10:27:20,272 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 [2024-09-13 10:27:20,272 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] [2024-09-13 10:27:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-13 10:27:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-09-13 10:27:20,282 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) [2024-09-13 10:27:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2024-09-13 10:27:20,283 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 11 [2024-09-13 10:27:20,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:20,284 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2024-09-13 10:27:20,284 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) [2024-09-13 10:27:20,284 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2024-09-13 10:27:20,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-13 10:27:20,285 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:20,285 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:20,285 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 10:27:20,285 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:20,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:20,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1484759222, now seen corresponding path program 1 times [2024-09-13 10:27:20,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:20,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438623885] [2024-09-13 10:27:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:20,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:20,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:20,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:20,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438623885] [2024-09-13 10:27:20,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438623885] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:27:20,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:27:20,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 10:27:20,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181406021] [2024-09-13 10:27:20,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:27:20,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:27:20,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:20,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:27:20,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:27:20,361 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) [2024-09-13 10:27:20,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:20,415 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2024-09-13 10:27:20,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:27:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-13 10:27:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:20,419 INFO L225 Difference]: With dead ends: 58 [2024-09-13 10:27:20,419 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 10:27:20,419 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:27:20,422 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 [2024-09-13 10:27:20,423 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] [2024-09-13 10:27:20,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 10:27:20,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-09-13 10:27:20,434 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) [2024-09-13 10:27:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2024-09-13 10:27:20,438 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 11 [2024-09-13 10:27:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:20,438 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2024-09-13 10:27:20,439 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 10:27:20,439 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2024-09-13 10:27:20,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-13 10:27:20,439 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:20,440 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:20,440 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 10:27:20,442 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:20,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1264662995, now seen corresponding path program 1 times [2024-09-13 10:27:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:20,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955903036] [2024-09-13 10:27:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:20,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:20,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:20,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:27:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:20,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:20,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955903036] [2024-09-13 10:27:20,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955903036] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:20,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894507440] [2024-09-13 10:27:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:20,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:20,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:20,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:20,871 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 10:27:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:20,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-13 10:27:20,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:21,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:22,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:27:22,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894507440] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:22,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:22,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2024-09-13 10:27:22,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745097410] [2024-09-13 10:27:22,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:22,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 10:27:22,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:22,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 10:27:22,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-13 10:27:22,338 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) [2024-09-13 10:27:23,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:23,128 INFO L93 Difference]: Finished difference Result 76 states and 118 transitions. [2024-09-13 10:27:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 10:27:23,128 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 [2024-09-13 10:27:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:23,130 INFO L225 Difference]: With dead ends: 76 [2024-09-13 10:27:23,131 INFO L226 Difference]: Without dead ends: 76 [2024-09-13 10:27:23,131 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2024-09-13 10:27:23,132 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:23,134 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 85 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:27:23,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-13 10:27:23,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2024-09-13 10:27:23,151 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) [2024-09-13 10:27:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2024-09-13 10:27:23,152 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 14 [2024-09-13 10:27:23,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:23,154 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2024-09-13 10:27:23,154 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) [2024-09-13 10:27:23,154 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2024-09-13 10:27:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-13 10:27:23,155 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:23,155 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:23,173 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 10:27:23,355 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:23,356 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:23,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash -507496426, now seen corresponding path program 1 times [2024-09-13 10:27:23,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:23,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779702240] [2024-09-13 10:27:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:23,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:23,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:23,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:23,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:23,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:23,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779702240] [2024-09-13 10:27:23,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779702240] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:23,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273825368] [2024-09-13 10:27:23,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:23,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:23,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:23,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:23,447 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 10:27:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:23,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-13 10:27:23,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:23,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-13 10:27:23,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273825368] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:23,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:23,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-09-13 10:27:23,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466916536] [2024-09-13 10:27:23,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:23,582 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 10:27:23,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 10:27:23,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-13 10:27:23,584 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) [2024-09-13 10:27:23,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:23,726 INFO L93 Difference]: Finished difference Result 77 states and 120 transitions. [2024-09-13 10:27:23,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 10:27:23,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 18 [2024-09-13 10:27:23,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:23,728 INFO L225 Difference]: With dead ends: 77 [2024-09-13 10:27:23,728 INFO L226 Difference]: Without dead ends: 72 [2024-09-13 10:27:23,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:27:23,728 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 [2024-09-13 10:27:23,729 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] [2024-09-13 10:27:23,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-13 10:27:23,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2024-09-13 10:27:23,741 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) [2024-09-13 10:27:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2024-09-13 10:27:23,744 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 18 [2024-09-13 10:27:23,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:23,744 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2024-09-13 10:27:23,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 10:27:23,744 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2024-09-13 10:27:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 10:27:23,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:23,747 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] [2024-09-13 10:27:23,764 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 10:27:23,951 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 10:27:23,952 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:23,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1491759416, now seen corresponding path program 1 times [2024-09-13 10:27:23,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:23,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022496295] [2024-09-13 10:27:23,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:23,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:24,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:27:24,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:24,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:24,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 10:27:24,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 10:27:24,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:24,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022496295] [2024-09-13 10:27:24,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022496295] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:24,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721444039] [2024-09-13 10:27:24,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:24,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:24,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:24,516 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:24,517 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 10:27:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:24,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-13 10:27:24,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 10:27:24,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 10:27:26,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721444039] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:26,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:26,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-09-13 10:27:26,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813891762] [2024-09-13 10:27:26,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:26,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 10:27:26,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:26,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 10:27:26,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:27:26,342 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) [2024-09-13 10:27:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:28,072 INFO L93 Difference]: Finished difference Result 133 states and 232 transitions. [2024-09-13 10:27:28,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 10:27:28,073 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 [2024-09-13 10:27:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:28,075 INFO L225 Difference]: With dead ends: 133 [2024-09-13 10:27:28,075 INFO L226 Difference]: Without dead ends: 129 [2024-09-13 10:27:28,076 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=433, Invalid=2117, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 10:27:28,077 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, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:28,077 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 85 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 10:27:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-09-13 10:27:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2024-09-13 10:27:28,089 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) [2024-09-13 10:27:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 159 transitions. [2024-09-13 10:27:28,090 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 159 transitions. Word has length 31 [2024-09-13 10:27:28,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:28,091 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 159 transitions. [2024-09-13 10:27:28,091 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) [2024-09-13 10:27:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 159 transitions. [2024-09-13 10:27:28,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 10:27:28,093 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:28,093 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] [2024-09-13 10:27:28,111 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 10:27:28,297 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 10:27:28,298 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:28,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1840574351, now seen corresponding path program 2 times [2024-09-13 10:27:28,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:28,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492116054] [2024-09-13 10:27:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:28,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:28,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-13 10:27:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:28,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:28,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:28,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:28,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:28,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:28,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 10:27:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 56 proven. 28 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-09-13 10:27:28,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:28,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492116054] [2024-09-13 10:27:28,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492116054] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:28,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321502657] [2024-09-13 10:27:28,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:27:28,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:28,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:28,661 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:28,662 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 10:27:28,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:27:28,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:28,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 10:27:28,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 69 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 10:27:28,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 42 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 10:27:28,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321502657] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:28,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:28,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2024-09-13 10:27:28,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497280305] [2024-09-13 10:27:28,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:28,941 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 10:27:28,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:28,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 10:27:28,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-09-13 10:27:28,942 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) [2024-09-13 10:27:29,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:29,365 INFO L93 Difference]: Finished difference Result 152 states and 275 transitions. [2024-09-13 10:27:29,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 10:27:29,366 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 [2024-09-13 10:27:29,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:29,367 INFO L225 Difference]: With dead ends: 152 [2024-09-13 10:27:29,367 INFO L226 Difference]: Without dead ends: 147 [2024-09-13 10:27:29,368 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 [2024-09-13 10:27:29,368 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 [2024-09-13 10:27:29,369 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] [2024-09-13 10:27:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-13 10:27:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2024-09-13 10:27:29,393 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) [2024-09-13 10:27:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 179 transitions. [2024-09-13 10:27:29,395 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 179 transitions. Word has length 59 [2024-09-13 10:27:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:29,399 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 179 transitions. [2024-09-13 10:27:29,399 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) [2024-09-13 10:27:29,400 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 179 transitions. [2024-09-13 10:27:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 10:27:29,401 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:29,401 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:27:29,422 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 10:27:29,602 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:29,602 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:29,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:29,603 INFO L85 PathProgramCache]: Analyzing trace with hash -506552652, now seen corresponding path program 1 times [2024-09-13 10:27:29,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:29,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146265424] [2024-09-13 10:27:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:29,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:29,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:29,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:29,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:29,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:29,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:29,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:29,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:27:29,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-13 10:27:29,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:29,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146265424] [2024-09-13 10:27:29,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146265424] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:29,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305756531] [2024-09-13 10:27:29,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:29,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:29,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:29,878 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:29,879 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 10:27:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:29,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 10:27:29,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-13 10:27:29,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-13 10:27:30,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305756531] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:30,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:30,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2024-09-13 10:27:30,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260705312] [2024-09-13 10:27:30,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:30,297 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 10:27:30,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:30,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 10:27:30,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-09-13 10:27:30,298 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) [2024-09-13 10:27:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:30,387 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2024-09-13 10:27:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 10:27:30,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2024-09-13 10:27:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:30,389 INFO L225 Difference]: With dead ends: 144 [2024-09-13 10:27:30,391 INFO L226 Difference]: Without dead ends: 121 [2024-09-13 10:27:30,392 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 [2024-09-13 10:27:30,392 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 [2024-09-13 10:27:30,393 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] [2024-09-13 10:27:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-13 10:27:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 100. [2024-09-13 10:27:30,401 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) [2024-09-13 10:27:30,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2024-09-13 10:27:30,402 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 44 [2024-09-13 10:27:30,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:30,402 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2024-09-13 10:27:30,403 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-13 10:27:30,403 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2024-09-13 10:27:30,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-13 10:27:30,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:30,405 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] [2024-09-13 10:27:30,421 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 10:27:30,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:30,610 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:30,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:30,610 INFO L85 PathProgramCache]: Analyzing trace with hash -585932244, now seen corresponding path program 3 times [2024-09-13 10:27:30,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:30,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035690812] [2024-09-13 10:27:30,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:30,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:31,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-13 10:27:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:31,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:31,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:31,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:31,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:31,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:31,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:31,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:27:31,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:31,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-13 10:27:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 36 proven. 71 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 10:27:31,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:31,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035690812] [2024-09-13 10:27:31,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035690812] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:31,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697149692] [2024-09-13 10:27:31,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:27:31,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:31,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:31,794 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:31,796 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 10:27:31,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-13 10:27:31,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:31,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 10:27:31,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-09-13 10:27:32,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-13 10:27:34,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697149692] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:34,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:34,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 25] total 47 [2024-09-13 10:27:34,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291132700] [2024-09-13 10:27:34,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:34,534 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 10:27:34,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 10:27:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 10:27:34,536 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) [2024-09-13 10:27:36,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:36,254 INFO L93 Difference]: Finished difference Result 152 states and 224 transitions. [2024-09-13 10:27:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 10:27:36,255 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 [2024-09-13 10:27:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:36,257 INFO L225 Difference]: With dead ends: 152 [2024-09-13 10:27:36,257 INFO L226 Difference]: Without dead ends: 144 [2024-09-13 10:27:36,258 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=796, Invalid=4460, Unknown=0, NotChecked=0, Total=5256 [2024-09-13 10:27:36,262 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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 [2024-09-13 10:27:36,262 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] [2024-09-13 10:27:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-13 10:27:36,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2024-09-13 10:27:36,277 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) [2024-09-13 10:27:36,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2024-09-13 10:27:36,281 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 61 [2024-09-13 10:27:36,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:36,281 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2024-09-13 10:27:36,282 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) [2024-09-13 10:27:36,282 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2024-09-13 10:27:36,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-13 10:27:36,283 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:36,283 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] [2024-09-13 10:27:36,300 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 10:27:36,484 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 10:27:36,484 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:36,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash -704301563, now seen corresponding path program 4 times [2024-09-13 10:27:36,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:36,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738305266] [2024-09-13 10:27:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-13 10:27:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 10:27:36,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 43 proven. 40 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-13 10:27:36,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738305266] [2024-09-13 10:27:36,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738305266] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:36,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966850740] [2024-09-13 10:27:36,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:27:36,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:36,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:36,915 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:36,917 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 10:27:36,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:27:36,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:36,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-13 10:27:36,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 47 proven. 59 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 10:27:37,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 47 proven. 61 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-09-13 10:27:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966850740] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:37,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:37,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 31 [2024-09-13 10:27:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819156203] [2024-09-13 10:27:37,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:37,441 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-13 10:27:37,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-13 10:27:37,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2024-09-13 10:27:37,442 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) [2024-09-13 10:27:37,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:37,939 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2024-09-13 10:27:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 10:27:37,940 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 [2024-09-13 10:27:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:37,941 INFO L225 Difference]: With dead ends: 134 [2024-09-13 10:27:37,941 INFO L226 Difference]: Without dead ends: 125 [2024-09-13 10:27:37,942 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=492, Invalid=2160, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 10:27:37,943 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 [2024-09-13 10:27:37,943 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] [2024-09-13 10:27:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-13 10:27:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2024-09-13 10:27:37,949 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) [2024-09-13 10:27:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2024-09-13 10:27:37,950 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 62 [2024-09-13 10:27:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:37,950 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2024-09-13 10:27:37,951 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) [2024-09-13 10:27:37,951 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2024-09-13 10:27:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-13 10:27:37,952 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:37,952 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] [2024-09-13 10:27:37,969 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 10:27:38,153 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:38,153 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:38,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:38,154 INFO L85 PathProgramCache]: Analyzing trace with hash 258141017, now seen corresponding path program 5 times [2024-09-13 10:27:38,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:38,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395629442] [2024-09-13 10:27:38,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:38,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:27:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-13 10:27:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:38,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:38,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 59 proven. 78 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-09-13 10:27:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:38,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395629442] [2024-09-13 10:27:38,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395629442] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:38,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970435166] [2024-09-13 10:27:38,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 10:27:38,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:38,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:38,649 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:38,650 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 10:27:38,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-13 10:27:38,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:38,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 10:27:38,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 59 proven. 71 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-13 10:27:38,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 77 proven. 61 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-13 10:27:39,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970435166] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:39,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:39,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 16] total 28 [2024-09-13 10:27:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961916043] [2024-09-13 10:27:39,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:39,601 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 10:27:39,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 10:27:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2024-09-13 10:27:39,603 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) [2024-09-13 10:27:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:39,998 INFO L93 Difference]: Finished difference Result 126 states and 162 transitions. [2024-09-13 10:27:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 10:27:39,998 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 [2024-09-13 10:27:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:39,999 INFO L225 Difference]: With dead ends: 126 [2024-09-13 10:27:39,999 INFO L226 Difference]: Without dead ends: 121 [2024-09-13 10:27:40,000 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 [2024-09-13 10:27:40,000 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 [2024-09-13 10:27:40,000 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] [2024-09-13 10:27:40,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-13 10:27:40,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2024-09-13 10:27:40,005 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) [2024-09-13 10:27:40,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2024-09-13 10:27:40,006 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 71 [2024-09-13 10:27:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:40,006 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2024-09-13 10:27:40,007 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) [2024-09-13 10:27:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2024-09-13 10:27:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-13 10:27:40,008 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:40,008 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] [2024-09-13 10:27:40,025 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 10:27:40,212 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:40,213 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:40,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:40,213 INFO L85 PathProgramCache]: Analyzing trace with hash 400355383, now seen corresponding path program 6 times [2024-09-13 10:27:40,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:40,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406905257] [2024-09-13 10:27:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:40,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:40,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 10:27:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:41,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-13 10:27:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:27:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:27:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 69 proven. 234 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-09-13 10:27:41,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:41,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406905257] [2024-09-13 10:27:41,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406905257] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:41,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817167347] [2024-09-13 10:27:41,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 10:27:41,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:41,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:41,785 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:27:41,786 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 10:27:41,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-13 10:27:41,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:41,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 10:27:41,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 98 proven. 197 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-13 10:27:42,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 102 proven. 214 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-09-13 10:27:43,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817167347] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:43,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:43,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 31] total 46 [2024-09-13 10:27:43,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596339119] [2024-09-13 10:27:43,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:43,605 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-13 10:27:43,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:43,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-13 10:27:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2024-09-13 10:27:43,607 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) [2024-09-13 10:27:50,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:50,785 INFO L93 Difference]: Finished difference Result 375 states and 667 transitions. [2024-09-13 10:27:50,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-09-13 10:27:50,786 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 [2024-09-13 10:27:50,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:50,789 INFO L225 Difference]: With dead ends: 375 [2024-09-13 10:27:50,789 INFO L226 Difference]: Without dead ends: 348 [2024-09-13 10:27:50,796 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 213 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7688 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4772, Invalid=23620, Unknown=0, NotChecked=0, Total=28392 [2024-09-13 10:27:50,797 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 263 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 4022 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 4484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 4022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:27:50,798 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 250 Invalid, 4484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 4022 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-13 10:27:50,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-13 10:27:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 199. [2024-09-13 10:27:50,818 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) [2024-09-13 10:27:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 329 transitions. [2024-09-13 10:27:50,821 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 329 transitions. Word has length 97 [2024-09-13 10:27:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:50,822 INFO L474 AbstractCegarLoop]: Abstraction has 199 states and 329 transitions. [2024-09-13 10:27:50,822 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) [2024-09-13 10:27:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 329 transitions. [2024-09-13 10:27:50,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-13 10:27:50,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:50,824 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] [2024-09-13 10:27:50,841 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 10:27:51,028 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 10:27:51,029 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:51,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1237629466, now seen corresponding path program 7 times [2024-09-13 10:27:51,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:51,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558409813] [2024-09-13 10:27:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:51,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-13 10:27:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-13 10:27:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:51,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:51,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:27:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:27:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:27:51,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 48 proven. 348 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2024-09-13 10:27:51,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:51,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558409813] [2024-09-13 10:27:51,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558409813] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:51,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556326992] [2024-09-13 10:27:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 10:27:51,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:51,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:51,602 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) [2024-09-13 10:27:51,603 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 10:27:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:51,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 10:27:51,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:51,793 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 385 proven. 66 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2024-09-13 10:27:51,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 54 proven. 347 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2024-09-13 10:27:52,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556326992] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:52,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:52,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 19 [2024-09-13 10:27:52,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706069442] [2024-09-13 10:27:52,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:52,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 10:27:52,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:52,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 10:27:52,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-09-13 10:27:52,322 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) [2024-09-13 10:27:52,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:27:52,596 INFO L93 Difference]: Finished difference Result 256 states and 404 transitions. [2024-09-13 10:27:52,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 10:27:52,597 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 [2024-09-13 10:27:52,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:27:52,599 INFO L225 Difference]: With dead ends: 256 [2024-09-13 10:27:52,600 INFO L226 Difference]: Without dead ends: 251 [2024-09-13 10:27:52,600 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 252 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=683, Unknown=0, NotChecked=0, Total=930 [2024-09-13 10:27:52,601 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 [2024-09-13 10:27:52,601 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] [2024-09-13 10:27:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-13 10:27:52,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 231. [2024-09-13 10:27:52,613 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) [2024-09-13 10:27:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 370 transitions. [2024-09-13 10:27:52,615 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 370 transitions. Word has length 118 [2024-09-13 10:27:52,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:27:52,616 INFO L474 AbstractCegarLoop]: Abstraction has 231 states and 370 transitions. [2024-09-13 10:27:52,616 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) [2024-09-13 10:27:52,616 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 370 transitions. [2024-09-13 10:27:52,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-13 10:27:52,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:27:52,617 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] [2024-09-13 10:27:52,637 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 10:27:52,818 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 [2024-09-13 10:27:52,818 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:27:52,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:27:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1804134002, now seen corresponding path program 8 times [2024-09-13 10:27:52,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:27:52,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915884218] [2024-09-13 10:27:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:27:52,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:27:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:53,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-13 10:27:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:53,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:54,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:27:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:27:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:27:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:27:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:27:54,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 10:27:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:27:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 58 proven. 172 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-13 10:27:54,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:27:54,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915884218] [2024-09-13 10:27:54,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915884218] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:27:54,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530403406] [2024-09-13 10:27:54,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:27:54,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:27:54,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:27:54,846 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) [2024-09-13 10:27:54,848 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 10:27:54,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:27:54,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:27:54,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 111 conjuncts are in the unsatisfiable core [2024-09-13 10:27:54,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:27:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 52 proven. 166 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2024-09-13 10:27:55,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:27:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 78 proven. 210 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-13 10:27:58,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530403406] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:27:58,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:27:58,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 37] total 67 [2024-09-13 10:27:58,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142961082] [2024-09-13 10:27:58,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:27:58,706 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-13 10:27:58,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:27:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-13 10:27:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4099, Unknown=0, NotChecked=0, Total=4556 [2024-09-13 10:27:58,708 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) [2024-09-13 10:28:01,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:01,364 INFO L93 Difference]: Finished difference Result 275 states and 487 transitions. [2024-09-13 10:28:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-13 10:28:01,365 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 [2024-09-13 10:28:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:01,368 INFO L225 Difference]: With dead ends: 275 [2024-09-13 10:28:01,368 INFO L226 Difference]: Without dead ends: 267 [2024-09-13 10:28:01,371 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2400 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1462, Invalid=9668, Unknown=0, NotChecked=0, Total=11130 [2024-09-13 10:28:01,373 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 [2024-09-13 10:28:01,374 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] [2024-09-13 10:28:01,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-13 10:28:01,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 241. [2024-09-13 10:28:01,386 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) [2024-09-13 10:28:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 394 transitions. [2024-09-13 10:28:01,388 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 394 transitions. Word has length 87 [2024-09-13 10:28:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:01,389 INFO L474 AbstractCegarLoop]: Abstraction has 241 states and 394 transitions. [2024-09-13 10:28:01,389 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) [2024-09-13 10:28:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 394 transitions. [2024-09-13 10:28:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-13 10:28:01,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:01,391 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] [2024-09-13 10:28:01,405 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:01,591 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 [2024-09-13 10:28:01,591 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:01,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:01,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1629749785, now seen corresponding path program 9 times [2024-09-13 10:28:01,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:01,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843194983] [2024-09-13 10:28:01,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:01,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-13 10:28:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:01,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:01,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:01,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 10:28:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:02,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 91 proven. 125 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2024-09-13 10:28:02,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:02,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843194983] [2024-09-13 10:28:02,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843194983] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:02,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727534283] [2024-09-13 10:28:02,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:28:02,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:02,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:02,184 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) [2024-09-13 10:28:02,186 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 10:28:02,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-13 10:28:02,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:02,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-13 10:28:02,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 91 proven. 114 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2024-09-13 10:28:02,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 107 proven. 112 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-13 10:28:03,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727534283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:03,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:03,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 17] total 25 [2024-09-13 10:28:03,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277695607] [2024-09-13 10:28:03,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:03,206 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 10:28:03,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 10:28:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-13 10:28:03,207 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) [2024-09-13 10:28:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:03,640 INFO L93 Difference]: Finished difference Result 225 states and 339 transitions. [2024-09-13 10:28:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 10:28:03,641 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 [2024-09-13 10:28:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:03,642 INFO L225 Difference]: With dead ends: 225 [2024-09-13 10:28:03,642 INFO L226 Difference]: Without dead ends: 218 [2024-09-13 10:28:03,643 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 [2024-09-13 10:28:03,643 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 [2024-09-13 10:28:03,644 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] [2024-09-13 10:28:03,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-13 10:28:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 190. [2024-09-13 10:28:03,654 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) [2024-09-13 10:28:03,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 283 transitions. [2024-09-13 10:28:03,655 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 283 transitions. Word has length 88 [2024-09-13 10:28:03,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:03,656 INFO L474 AbstractCegarLoop]: Abstraction has 190 states and 283 transitions. [2024-09-13 10:28:03,657 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) [2024-09-13 10:28:03,657 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 283 transitions. [2024-09-13 10:28:03,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-09-13 10:28:03,658 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:03,658 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] [2024-09-13 10:28:03,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:03,858 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 [2024-09-13 10:28:03,859 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:03,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1107348169, now seen corresponding path program 10 times [2024-09-13 10:28:03,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:03,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610019538] [2024-09-13 10:28:03,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:03,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-13 10:28:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 10:28:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:28:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 170 proven. 223 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2024-09-13 10:28:04,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:04,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610019538] [2024-09-13 10:28:04,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610019538] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:04,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961697028] [2024-09-13 10:28:04,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:28:04,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:04,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:04,720 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) [2024-09-13 10:28:04,721 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 10:28:04,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:28:04,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:04,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-13 10:28:04,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 173 proven. 235 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2024-09-13 10:28:05,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 173 proven. 263 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2024-09-13 10:28:06,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961697028] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:06,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:06,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 21] total 38 [2024-09-13 10:28:06,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003805918] [2024-09-13 10:28:06,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:06,196 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 10:28:06,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:06,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 10:28:06,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1261, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 10:28:06,197 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) [2024-09-13 10:28:07,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:07,003 INFO L93 Difference]: Finished difference Result 242 states and 384 transitions. [2024-09-13 10:28:07,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 10:28:07,004 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 [2024-09-13 10:28:07,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:07,006 INFO L225 Difference]: With dead ends: 242 [2024-09-13 10:28:07,006 INFO L226 Difference]: Without dead ends: 242 [2024-09-13 10:28:07,007 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 241 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=649, Invalid=3133, Unknown=0, NotChecked=0, Total=3782 [2024-09-13 10:28:07,007 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 162 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:07,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 205 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 10:28:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2024-09-13 10:28:07,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 188. [2024-09-13 10:28:07,016 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) [2024-09-13 10:28:07,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 277 transitions. [2024-09-13 10:28:07,017 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 277 transitions. Word has length 114 [2024-09-13 10:28:07,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:07,017 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 277 transitions. [2024-09-13 10:28:07,018 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) [2024-09-13 10:28:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 277 transitions. [2024-09-13 10:28:07,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-13 10:28:07,020 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:07,020 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] [2024-09-13 10:28:07,039 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-13 10:28:07,220 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 [2024-09-13 10:28:07,221 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:07,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:07,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1149920590, now seen corresponding path program 11 times [2024-09-13 10:28:07,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:07,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263055694] [2024-09-13 10:28:07,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:07,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:07,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:28:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:08,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:09,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:09,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:09,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:09,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:10,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:28:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:28:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-13 10:28:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-13 10:28:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:10,447 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 117 proven. 218 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2024-09-13 10:28:10,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:10,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263055694] [2024-09-13 10:28:10,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263055694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:10,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009073592] [2024-09-13 10:28:10,448 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 10:28:10,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:10,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:10,452 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) [2024-09-13 10:28:10,453 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 10:28:10,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-13 10:28:10,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:10,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-13 10:28:10,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 113 proven. 262 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2024-09-13 10:28:11,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 153 proven. 304 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-13 10:28:22,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009073592] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:22,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:22,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 49] total 110 [2024-09-13 10:28:22,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841424959] [2024-09-13 10:28:22,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:22,498 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-13 10:28:22,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:22,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-13 10:28:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1305, Invalid=10905, Unknown=0, NotChecked=0, Total=12210 [2024-09-13 10:28:22,501 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) [2024-09-13 10:28:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:26,149 INFO L93 Difference]: Finished difference Result 354 states and 680 transitions. [2024-09-13 10:28:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-09-13 10:28:26,150 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 [2024-09-13 10:28:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:26,153 INFO L225 Difference]: With dead ends: 354 [2024-09-13 10:28:26,153 INFO L226 Difference]: Without dead ends: 347 [2024-09-13 10:28:26,157 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 164 SyntacticMatches, 7 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9835 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4701, Invalid=26451, Unknown=0, NotChecked=0, Total=31152 [2024-09-13 10:28:26,157 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2523 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:26,158 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 148 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2523 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 10:28:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2024-09-13 10:28:26,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 177. [2024-09-13 10:28:26,172 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) [2024-09-13 10:28:26,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 249 transitions. [2024-09-13 10:28:26,174 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 249 transitions. Word has length 105 [2024-09-13 10:28:26,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:26,174 INFO L474 AbstractCegarLoop]: Abstraction has 177 states and 249 transitions. [2024-09-13 10:28:26,174 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) [2024-09-13 10:28:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 249 transitions. [2024-09-13 10:28:26,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-09-13 10:28:26,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:26,176 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] [2024-09-13 10:28:26,194 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 10:28:26,376 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 [2024-09-13 10:28:26,377 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:26,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1482059844, now seen corresponding path program 12 times [2024-09-13 10:28:26,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:26,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108587533] [2024-09-13 10:28:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:26,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:26,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:28:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:26,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:28:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-13 10:28:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:27,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 399 proven. 311 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2024-09-13 10:28:27,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108587533] [2024-09-13 10:28:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108587533] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909325422] [2024-09-13 10:28:27,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 10:28:27,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:27,645 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) [2024-09-13 10:28:27,648 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 10:28:27,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-13 10:28:27,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:27,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-09-13 10:28:27,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 297 proven. 524 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2024-09-13 10:28:28,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:32,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 312 proven. 535 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2024-09-13 10:28:32,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909325422] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:32,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:32,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 34, 50] total 94 [2024-09-13 10:28:32,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821770479] [2024-09-13 10:28:32,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:32,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-09-13 10:28:32,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:32,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-09-13 10:28:32,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=469, Invalid=8273, Unknown=0, NotChecked=0, Total=8742 [2024-09-13 10:28:32,322 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) [2024-09-13 10:28:38,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:38,806 INFO L93 Difference]: Finished difference Result 275 states and 391 transitions. [2024-09-13 10:28:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2024-09-13 10:28:38,807 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 [2024-09-13 10:28:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:38,809 INFO L225 Difference]: With dead ends: 275 [2024-09-13 10:28:38,809 INFO L226 Difference]: Without dead ends: 258 [2024-09-13 10:28:38,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 280 SyntacticMatches, 2 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9714 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4157, Invalid=30253, Unknown=0, NotChecked=0, Total=34410 [2024-09-13 10:28:38,813 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 321 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3948 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 4493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 3948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:38,813 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 209 Invalid, 4493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 3948 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-13 10:28:38,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-09-13 10:28:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 210. [2024-09-13 10:28:38,820 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) [2024-09-13 10:28:38,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 289 transitions. [2024-09-13 10:28:38,821 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 289 transitions. Word has length 152 [2024-09-13 10:28:38,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:38,822 INFO L474 AbstractCegarLoop]: Abstraction has 210 states and 289 transitions. [2024-09-13 10:28:38,822 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) [2024-09-13 10:28:38,822 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 289 transitions. [2024-09-13 10:28:38,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-13 10:28:38,824 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:38,824 INFO L216 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:28:38,840 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:39,024 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 [2024-09-13 10:28:39,025 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:39,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:39,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1950095843, now seen corresponding path program 2 times [2024-09-13 10:28:39,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:39,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791771689] [2024-09-13 10:28:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:39,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:39,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:28:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-13 10:28:40,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:40,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:40,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:41,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:28:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:28:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 163 refuted. 0 times theorem prover too weak. 995 trivial. 0 not checked. [2024-09-13 10:28:41,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:41,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791771689] [2024-09-13 10:28:41,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791771689] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:41,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275221361] [2024-09-13 10:28:41,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:28:41,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:41,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:41,276 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) [2024-09-13 10:28:41,277 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 10:28:41,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 10:28:41,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:41,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 10:28:41,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 1715 trivial. 0 not checked. [2024-09-13 10:28:41,835 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:28:41,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275221361] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:28:41,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:28:41,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [25] total 28 [2024-09-13 10:28:41,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241773394] [2024-09-13 10:28:41,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:28:41,836 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:28:41,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:41,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:28:41,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=698, Unknown=0, NotChecked=0, Total=756 [2024-09-13 10:28:41,837 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) [2024-09-13 10:28:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:41,871 INFO L93 Difference]: Finished difference Result 208 states and 287 transitions. [2024-09-13 10:28:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:28:41,871 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 [2024-09-13 10:28:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:41,873 INFO L225 Difference]: With dead ends: 208 [2024-09-13 10:28:41,873 INFO L226 Difference]: Without dead ends: 193 [2024-09-13 10:28:41,873 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 [2024-09-13 10:28:41,873 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 [2024-09-13 10:28:41,874 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] [2024-09-13 10:28:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-13 10:28:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 183. [2024-09-13 10:28:41,882 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) [2024-09-13 10:28:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 233 transitions. [2024-09-13 10:28:41,883 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 233 transitions. Word has length 182 [2024-09-13 10:28:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:41,883 INFO L474 AbstractCegarLoop]: Abstraction has 183 states and 233 transitions. [2024-09-13 10:28:41,883 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) [2024-09-13 10:28:41,883 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 233 transitions. [2024-09-13 10:28:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-09-13 10:28:41,885 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:41,885 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] [2024-09-13 10:28:41,901 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-13 10:28:42,085 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 [2024-09-13 10:28:42,086 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:42,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:42,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1306550061, now seen corresponding path program 13 times [2024-09-13 10:28:42,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:42,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292411743] [2024-09-13 10:28:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:42,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:42,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:42,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:28:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:42,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:42,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:42,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:42,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:42,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:42,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:42,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:28:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:43,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-13 10:28:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:43,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:43,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:43,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:28:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 488 proven. 432 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2024-09-13 10:28:43,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:43,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292411743] [2024-09-13 10:28:43,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292411743] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:43,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388325568] [2024-09-13 10:28:43,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 10:28:43,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:43,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:43,505 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) [2024-09-13 10:28:43,506 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 10:28:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:43,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 10:28:43,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:43,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 488 proven. 401 refuted. 0 times theorem prover too weak. 691 trivial. 0 not checked. [2024-09-13 10:28:43,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 544 proven. 405 refuted. 0 times theorem prover too weak. 631 trivial. 0 not checked. [2024-09-13 10:28:47,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388325568] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:47,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:47,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 29] total 37 [2024-09-13 10:28:47,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728447159] [2024-09-13 10:28:47,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:47,685 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-13 10:28:47,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-13 10:28:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1161, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 10:28:47,685 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) [2024-09-13 10:28:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:48,423 INFO L93 Difference]: Finished difference Result 209 states and 262 transitions. [2024-09-13 10:28:48,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-13 10:28:48,424 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 [2024-09-13 10:28:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:48,426 INFO L225 Difference]: With dead ends: 209 [2024-09-13 10:28:48,426 INFO L226 Difference]: Without dead ends: 189 [2024-09-13 10:28:48,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 364 SyntacticMatches, 25 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=984, Invalid=4128, Unknown=0, NotChecked=0, Total=5112 [2024-09-13 10:28:48,427 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:28:48,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 64 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:28:48,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-09-13 10:28:48,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 170. [2024-09-13 10:28:48,432 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) [2024-09-13 10:28:48,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions. [2024-09-13 10:28:48,433 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 172 [2024-09-13 10:28:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:48,434 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 206 transitions. [2024-09-13 10:28:48,434 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) [2024-09-13 10:28:48,434 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions. [2024-09-13 10:28:48,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2024-09-13 10:28:48,436 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:48,436 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] [2024-09-13 10:28:48,455 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-13 10:28:48,637 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 [2024-09-13 10:28:48,637 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:48,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:48,638 INFO L85 PathProgramCache]: Analyzing trace with hash 920689794, now seen corresponding path program 14 times [2024-09-13 10:28:48,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:48,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137576716] [2024-09-13 10:28:48,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:48,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:48,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:28:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:28:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-13 10:28:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:28:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:28:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 451 proven. 500 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-09-13 10:28:49,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:28:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137576716] [2024-09-13 10:28:49,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137576716] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:28:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518436480] [2024-09-13 10:28:49,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:28:49,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:28:49,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:28:49,661 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) [2024-09-13 10:28:49,661 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 10:28:49,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:28:49,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:28:49,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 10:28:49,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:28:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 455 proven. 561 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2024-09-13 10:28:50,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:28:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1845 backedges. 455 proven. 592 refuted. 0 times theorem prover too weak. 798 trivial. 0 not checked. [2024-09-13 10:28:52,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518436480] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:28:52,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:28:52,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 15] total 20 [2024-09-13 10:28:52,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255638018] [2024-09-13 10:28:52,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:28:52,099 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 10:28:52,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:28:52,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 10:28:52,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2024-09-13 10:28:52,100 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) [2024-09-13 10:28:52,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:28:52,238 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2024-09-13 10:28:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 10:28:52,238 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 [2024-09-13 10:28:52,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:28:52,240 INFO L225 Difference]: With dead ends: 165 [2024-09-13 10:28:52,240 INFO L226 Difference]: Without dead ends: 165 [2024-09-13 10:28:52,240 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 [2024-09-13 10:28:52,240 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 [2024-09-13 10:28:52,241 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] [2024-09-13 10:28:52,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-13 10:28:52,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-09-13 10:28:52,245 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) [2024-09-13 10:28:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2024-09-13 10:28:52,245 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 185 [2024-09-13 10:28:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:28:52,246 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2024-09-13 10:28:52,246 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) [2024-09-13 10:28:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2024-09-13 10:28:52,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2024-09-13 10:28:52,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:28:52,254 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] [2024-09-13 10:28:52,272 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-13 10:28:52,454 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 [2024-09-13 10:28:52,454 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:28:52,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:28:52,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1286461764, now seen corresponding path program 15 times [2024-09-13 10:28:52,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:28:52,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705055647] [2024-09-13 10:28:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:28:52,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:28:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:28:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:28:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:54,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:28:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:28:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:28:54,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:54,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-13 10:28:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:28:58,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:28:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:00,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:00,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:01,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:02,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:29:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-13 10:29:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:29:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:29:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-13 10:29:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:02,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:03,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:29:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:29:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 265 [2024-09-13 10:29:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:29:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:29:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2024-09-13 10:29:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:03,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:03,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:29:03,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:29:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16728 backedges. 5729 proven. 2603 refuted. 0 times theorem prover too weak. 8396 trivial. 0 not checked. [2024-09-13 10:29:03,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:29:03,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705055647] [2024-09-13 10:29:03,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705055647] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:29:03,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198647713] [2024-09-13 10:29:03,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 10:29:03,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:29:03,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:29:03,673 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) [2024-09-13 10:29:03,674 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 10:29:03,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-13 10:29:03,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:29:03,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-09-13 10:29:03,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:29:04,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16728 backedges. 4577 proven. 822 refuted. 0 times theorem prover too weak. 11329 trivial. 0 not checked. [2024-09-13 10:29:04,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:29:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16728 backedges. 4200 proven. 692 refuted. 0 times theorem prover too weak. 11836 trivial. 0 not checked. [2024-09-13 10:29:06,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198647713] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:29:06,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:29:06,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 23, 23] total 68 [2024-09-13 10:29:06,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658249868] [2024-09-13 10:29:06,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:29:06,959 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-13 10:29:06,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:29:06,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-13 10:29:06,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=4158, Unknown=0, NotChecked=0, Total=4556 [2024-09-13 10:29:06,961 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) [2024-09-13 10:29:09,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:29:09,206 INFO L93 Difference]: Finished difference Result 219 states and 259 transitions. [2024-09-13 10:29:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-13 10:29:09,206 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 [2024-09-13 10:29:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:29:09,208 INFO L225 Difference]: With dead ends: 219 [2024-09-13 10:29:09,208 INFO L226 Difference]: Without dead ends: 219 [2024-09-13 10:29:09,211 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1366 GetRequests, 1230 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4927 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2486, Invalid=16420, Unknown=0, NotChecked=0, Total=18906 [2024-09-13 10:29:09,211 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, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 10:29:09,212 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 88 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 2213 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 10:29:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-13 10:29:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 191. [2024-09-13 10:29:09,218 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) [2024-09-13 10:29:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 223 transitions. [2024-09-13 10:29:09,219 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 223 transitions. Word has length 539 [2024-09-13 10:29:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:29:09,220 INFO L474 AbstractCegarLoop]: Abstraction has 191 states and 223 transitions. [2024-09-13 10:29:09,220 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) [2024-09-13 10:29:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 223 transitions. [2024-09-13 10:29:09,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2024-09-13 10:29:09,229 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:29:09,230 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] [2024-09-13 10:29:09,248 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-13 10:29:09,430 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 [2024-09-13 10:29:09,430 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-13 10:29:09,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:29:09,431 INFO L85 PathProgramCache]: Analyzing trace with hash -2030147053, now seen corresponding path program 16 times [2024-09-13 10:29:09,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:29:09,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419008093] [2024-09-13 10:29:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:29:09,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:29:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-13 10:29:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:11,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:11,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:11,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:29:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:11,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-13 10:29:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:13,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:14,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:14,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-13 10:29:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:15,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-13 10:29:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:15,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:29:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:29:15,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:15,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-13 10:29:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,399 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:29:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:29:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-13 10:29:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2024-09-13 10:29:16,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:29:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:29:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-13 10:29:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2024-09-13 10:29:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-13 10:29:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 10:29:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 10:29:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-13 10:29:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 10:29:16,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-13 10:29:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-13 10:29:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:29:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 19853 backedges. 3348 proven. 3066 refuted. 0 times theorem prover too weak. 13439 trivial. 0 not checked. [2024-09-13 10:29:16,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:29:16,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419008093] [2024-09-13 10:29:16,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419008093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:29:16,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103519064] [2024-09-13 10:29:16,582 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 10:29:16,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:29:16,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:29:16,584 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) [2024-09-13 10:29:16,585 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 10:29:17,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 10:29:17,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:29:17,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 1694 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-09-13 10:29:17,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:29:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 19853 backedges. 4047 proven. 4609 refuted. 0 times theorem prover too weak. 11197 trivial. 0 not checked. [2024-09-13 10:29:17,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:29:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 19853 backedges. 4084 proven. 4964 refuted. 0 times theorem prover too weak. 10805 trivial. 0 not checked. [2024-09-13 10:29:20,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103519064] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:29:20,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:29:20,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 20, 31] total 66 [2024-09-13 10:29:20,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989235443] [2024-09-13 10:29:20,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:29:20,757 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-13 10:29:20,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:29:20,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-13 10:29:20,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=3977, Unknown=0, NotChecked=0, Total=4290 [2024-09-13 10:29:20,758 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) [2024-09-13 10:29:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:29:23,601 INFO L93 Difference]: Finished difference Result 230 states and 271 transitions. [2024-09-13 10:29:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-09-13 10:29:23,602 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 [2024-09-13 10:29:23,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:29:23,603 INFO L225 Difference]: With dead ends: 230 [2024-09-13 10:29:23,603 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 10:29:23,606 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 [2024-09-13 10:29:23,607 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 366 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 419 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s 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 [2024-09-13 10:29:23,607 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] [2024-09-13 10:29:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 10:29:23,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 10:29:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:29:23,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 10:29:23,608 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 586 [2024-09-13 10:29:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:29:23,608 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 10:29:23,608 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) [2024-09-13 10:29:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 10:29:23,609 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 10:29:23,611 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-13 10:29:23,611 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ackermannErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-13 10:29:23,628 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-13 10:29:23,812 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 [2024-09-13 10:29:23,814 INFO L408 BasicCegarLoop]: Path program histogram: [16, 2, 1, 1, 1, 1, 1, 1] [2024-09-13 10:29:23,816 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 10:29:23,818 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 10:29:23 BoogieIcfgContainer [2024-09-13 10:29:23,818 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 10:29:23,818 INFO L158 Benchmark]: Toolchain (without parser) took 125772.60ms. Allocated memory was 161.5MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 104.2MB in the beginning and 1.1GB in the end (delta: -1.0GB). Peak memory consumption was 713.8MB. Max. memory is 16.1GB. [2024-09-13 10:29:23,818 INFO L158 Benchmark]: Witness Parser took 0.22ms. Allocated memory is still 161.5MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:29:23,818 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 161.5MB. Free memory is still 120.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:29:23,819 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.01ms. Allocated memory is still 161.5MB. Free memory was 103.7MB in the beginning and 90.7MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-13 10:29:23,819 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.99ms. Allocated memory is still 161.5MB. Free memory was 90.7MB in the beginning and 89.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:29:23,819 INFO L158 Benchmark]: Boogie Preprocessor took 41.22ms. Allocated memory is still 161.5MB. Free memory was 89.3MB in the beginning and 87.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:29:23,819 INFO L158 Benchmark]: RCFGBuilder took 377.71ms. Allocated memory is still 161.5MB. Free memory was 87.4MB in the beginning and 128.9MB in the end (delta: -41.5MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. [2024-09-13 10:29:23,819 INFO L158 Benchmark]: TraceAbstraction took 125032.64ms. Allocated memory was 161.5MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 128.6MB in the beginning and 1.1GB in the end (delta: -985.3MB). Peak memory consumption was 736.9MB. Max. memory is 16.1GB. [2024-09-13 10:29:23,820 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 0.22ms. Allocated memory is still 161.5MB. Free memory is still 122.1MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.12ms. Allocated memory is still 161.5MB. Free memory is still 120.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.01ms. Allocated memory is still 161.5MB. Free memory was 103.7MB in the beginning and 90.7MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.99ms. Allocated memory is still 161.5MB. Free memory was 90.7MB in the beginning and 89.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.22ms. Allocated memory is still 161.5MB. Free memory was 89.3MB in the beginning and 87.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 377.71ms. Allocated memory is still 161.5MB. Free memory was 87.4MB in the beginning and 128.9MB in the end (delta: -41.5MB). Peak memory consumption was 20.9MB. Max. memory is 16.1GB. * TraceAbstraction took 125032.64ms. Allocated memory was 161.5MB in the beginning and 1.9GB in the end (delta: 1.7GB). Free memory was 128.6MB in the beginning and 1.1GB in the end (delta: -985.3MB). Peak memory consumption was 736.9MB. 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: 125.0s, OverallIterations: 24, TraceHistogramMax: 90, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.1s, AutomataDifference: 33.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2565 SdHoareTripleChecker+Valid, 11.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2475 mSDsluCounter, 2617 SdHoareTripleChecker+Invalid, 9.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2141 mSDsCounter, 3238 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 25143 IncrementalHoareTripleChecker+Invalid, 28381 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3238 mSolverCounterUnsat, 476 mSDtfsCounter, 25143 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7361 GetRequests, 5771 SyntacticMatches, 108 SemanticMatches, 1482 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45695 ImplicationChecksByTransitivity, 36.4s 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: 0.3s AutomataMinimizationTime, 24 MinimizatonAttempts, 740 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 82.9s 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! [2024-09-13 10:29:23,854 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...