./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann01-2.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/recursive/Ackermann01-2.c ../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann01-2.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 19:52:03,265 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:52:03,338 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:52:03,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:52:03,345 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:52:03,374 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:52:03,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:52:03,377 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:52:03,378 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:52:03,382 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:52:03,382 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:52:03,382 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:52:03,383 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:52:03,383 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:52:03,383 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:52:03,383 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:52:03,384 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:52:03,384 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:52:03,385 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:52:03,386 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:52:03,386 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:52:03,386 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:52:03,387 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:52:03,387 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:52:03,388 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:52:03,388 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:52:03,388 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:52:03,389 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:52:03,389 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:52:03,389 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:52:03,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:52:03,390 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:52:03,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:52:03,390 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:52:03,391 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:52:03,391 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:52:03,391 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:52:03,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:52:03,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:52:03,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:52:03,392 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:52:03,393 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:52:03,393 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-17 19:52:03,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:52:03,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:52:03,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:52:03,684 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-17 19:52:03,685 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-17 19:52:03,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann01-2.yml/witness-2.1.yml [2024-09-17 19:52:03,746 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:52:03,747 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:52:03,747 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/Ackermann01-2.c [2024-09-17 19:52:05,144 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:52:05,335 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:52:05,335 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann01-2.c [2024-09-17 19:52:05,342 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9b815034c/ff7af8b234aa46fc8922a9ea1dd48c36/FLAG20b77f625 [2024-09-17 19:52:05,719 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9b815034c/ff7af8b234aa46fc8922a9ea1dd48c36 [2024-09-17 19:52:05,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:52:05,721 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-17 19:52:05,722 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:52:05,722 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:52:05,728 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:52:05,729 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:03" (1/2) ... [2024-09-17 19:52:05,730 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd3024b and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:52:05, skipping insertion in model container [2024-09-17 19:52:05,732 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:03" (1/2) ... [2024-09-17 19:52:05,733 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5d291a6d and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:52:05, skipping insertion in model container [2024-09-17 19:52:05,734 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:52:05" (2/2) ... [2024-09-17 19:52:05,734 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd3024b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:05, skipping insertion in model container [2024-09-17 19:52:05,734 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:52:05" (2/2) ... [2024-09-17 19:52:05,740 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-17 19:52:05,741 INFO L1541 ArrayList]: Function contract at [L17]: requires null, ensures (((0 < \old(m)) || ((\old(m) == 0) && (((long long) \old(n) + 1) <= \result))) && (((((((2 <= \old(m)) && (0 <= \result)) && (\old(n) <= 0)) || ((\old(m) == 1) && (3 <= \result))) || (\old(m) < 1)) || (((2 <= \result) && (\old(n) <= 0)) && (\old(m) == 1))) || ((2 <= \old(m)) && (0 <= \result)))) [2024-09-17 19:52:05,761 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:52:05,943 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2024-09-17 19:52:05,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:52:05,976 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-17 19:52:06,017 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2024-09-17 19:52:06,018 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:52:06,032 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:52:06,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06 WrapperNode [2024-09-17 19:52:06,033 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:52:06,034 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:52:06,034 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:52:06,034 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:52:06,041 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,047 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,062 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-09-17 19:52:06,063 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:52:06,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:52:06,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:52:06,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:52:06,071 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,071 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,073 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,081 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 [2024-09-17 19:52:06,082 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,082 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,086 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,088 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,088 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,089 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,091 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:52:06,092 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:52:06,092 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:52:06,092 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:52:06,093 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (1/1) ... [2024-09-17 19:52:06,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:52:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:06,121 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) [2024-09-17 19:52:06,122 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 [2024-09-17 19:52:06,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:52:06,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:52:06,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:52:06,168 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-09-17 19:52:06,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-09-17 19:52:06,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-17 19:52:06,219 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:52:06,220 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:52:06,361 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-17 19:52:06,361 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:52:06,384 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:52:06,384 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-17 19:52:06,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:52:06 BoogieIcfgContainer [2024-09-17 19:52:06,385 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:52:06,388 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:52:06,388 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:52:06,392 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:52:06,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:03" (1/4) ... [2024-09-17 19:52:06,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ca68cf and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 17.09 07:52:06, skipping insertion in model container [2024-09-17 19:52:06,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:52:05" (2/4) ... [2024-09-17 19:52:06,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ca68cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:52:06, skipping insertion in model container [2024-09-17 19:52:06,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:06" (3/4) ... [2024-09-17 19:52:06,394 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74ca68cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:52:06, skipping insertion in model container [2024-09-17 19:52:06,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:52:06" (4/4) ... [2024-09-17 19:52:06,396 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2024-09-17 19:52:06,419 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:52:06,420 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-17 19:52:06,478 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:52:06,486 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;@4607a023, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:52:06,487 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-17 19:52:06,491 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) [2024-09-17 19:52:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-09-17 19:52:06,498 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:06,499 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:06,499 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:06,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash -26348941, now seen corresponding path program 1 times [2024-09-17 19:52:06,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:06,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528412874] [2024-09-17 19:52:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:06,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:06,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:06,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528412874] [2024-09-17 19:52:06,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528412874] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:06,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:06,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 19:52:06,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068080557] [2024-09-17 19:52:06,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:06,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 19:52:06,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:06,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 19:52:06,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 19:52:06,942 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) [2024-09-17 19:52:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:07,113 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2024-09-17 19:52:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 19:52:07,119 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 [2024-09-17 19:52:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:07,127 INFO L225 Difference]: With dead ends: 39 [2024-09-17 19:52:07,127 INFO L226 Difference]: Without dead ends: 36 [2024-09-17 19:52:07,129 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 [2024-09-17 19:52:07,134 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:07,137 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 51 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:07,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-17 19:52:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2024-09-17 19:52:07,179 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, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-17 19:52:07,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2024-09-17 19:52:07,183 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 7 [2024-09-17 19:52:07,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:07,184 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2024-09-17 19:52:07,184 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) [2024-09-17 19:52:07,185 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2024-09-17 19:52:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-17 19:52:07,188 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:07,188 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:07,189 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:52:07,189 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:07,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:07,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1506041859, now seen corresponding path program 1 times [2024-09-17 19:52:07,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:07,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544108729] [2024-09-17 19:52:07,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:07,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:07,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:07,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544108729] [2024-09-17 19:52:07,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544108729] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:07,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:07,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-17 19:52:07,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984655024] [2024-09-17 19:52:07,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:07,513 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:52:07,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:52:07,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:52:07,516 INFO L87 Difference]: Start difference. First operand 30 states and 40 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) [2024-09-17 19:52:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:07,585 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-09-17 19:52:07,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:52:07,587 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 [2024-09-17 19:52:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:07,588 INFO L225 Difference]: With dead ends: 42 [2024-09-17 19:52:07,588 INFO L226 Difference]: Without dead ends: 42 [2024-09-17 19:52:07,588 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 [2024-09-17 19:52:07,589 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:07,590 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 48 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-17 19:52:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-09-17 19:52:07,602 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, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-17 19:52:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 53 transitions. [2024-09-17 19:52:07,605 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 53 transitions. Word has length 11 [2024-09-17 19:52:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:07,606 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 53 transitions. [2024-09-17 19:52:07,606 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) [2024-09-17 19:52:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 53 transitions. [2024-09-17 19:52:07,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-17 19:52:07,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:07,608 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:07,608 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 19:52:07,609 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:07,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1484759222, now seen corresponding path program 1 times [2024-09-17 19:52:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:07,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403812883] [2024-09-17 19:52:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:07,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:07,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:07,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:07,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403812883] [2024-09-17 19:52:07,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403812883] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:07,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:07,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-17 19:52:07,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047898155] [2024-09-17 19:52:07,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:07,776 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-17 19:52:07,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:07,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-17 19:52:07,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-17 19:52:07,779 INFO L87 Difference]: Start difference. First operand 40 states and 53 transitions. Second operand has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 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) [2024-09-17 19:52:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:07,905 INFO L93 Difference]: Finished difference Result 58 states and 83 transitions. [2024-09-17 19:52:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 19:52:07,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 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 [2024-09-17 19:52:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:07,907 INFO L225 Difference]: With dead ends: 58 [2024-09-17 19:52:07,907 INFO L226 Difference]: Without dead ends: 56 [2024-09-17 19:52:07,907 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-17 19:52:07,908 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:07,909 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 55 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:07,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-17 19:52:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-09-17 19:52:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.303030303030303) internal successors, (43), 34 states have internal predecessors, (43), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) [2024-09-17 19:52:07,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 73 transitions. [2024-09-17 19:52:07,925 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 73 transitions. Word has length 11 [2024-09-17 19:52:07,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:07,925 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 73 transitions. [2024-09-17 19:52:07,925 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.5) internal successors, (9), 7 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) [2024-09-17 19:52:07,925 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 73 transitions. [2024-09-17 19:52:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-17 19:52:07,926 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:07,926 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:07,927 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-17 19:52:07,927 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:07,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:07,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1264662995, now seen corresponding path program 1 times [2024-09-17 19:52:07,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:07,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009647809] [2024-09-17 19:52:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:07,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:08,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-17 19:52:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:08,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:08,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:08,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009647809] [2024-09-17 19:52:08,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009647809] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:08,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448993383] [2024-09-17 19:52:08,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:08,232 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) [2024-09-17 19:52:08,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:52:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:08,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 19:52:08,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:08,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:52:08,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:09,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448993383] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:09,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:09,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2024-09-17 19:52:09,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643370773] [2024-09-17 19:52:09,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:09,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 19:52:09,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 19:52:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-09-17 19:52:09,011 INFO L87 Difference]: Start difference. First operand 50 states and 73 transitions. Second operand has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 19:52:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:09,426 INFO L93 Difference]: Finished difference Result 65 states and 99 transitions. [2024-09-17 19:52:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 19:52:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 14 [2024-09-17 19:52:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:09,428 INFO L225 Difference]: With dead ends: 65 [2024-09-17 19:52:09,430 INFO L226 Difference]: Without dead ends: 65 [2024-09-17 19:52:09,431 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=457, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:52:09,432 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:09,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 68 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:09,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-17 19:52:09,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 47. [2024-09-17 19:52:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 34 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-17 19:52:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 68 transitions. [2024-09-17 19:52:09,450 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 68 transitions. Word has length 14 [2024-09-17 19:52:09,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:09,450 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 68 transitions. [2024-09-17 19:52:09,451 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 15 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 19:52:09,451 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 68 transitions. [2024-09-17 19:52:09,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-17 19:52:09,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:09,452 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:09,470 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:09,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:09,657 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:09,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash -507496426, now seen corresponding path program 1 times [2024-09-17 19:52:09,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:09,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89755696] [2024-09-17 19:52:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:09,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:09,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:09,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:09,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89755696] [2024-09-17 19:52:09,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89755696] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:09,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940528052] [2024-09-17 19:52:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:09,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:09,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:09,810 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) [2024-09-17 19:52:09,811 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:52:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:09,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 19:52:09,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:09,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:09,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:10,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940528052] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:10,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-17 19:52:10,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 16 [2024-09-17 19:52:10,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376665835] [2024-09-17 19:52:10,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:10,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-17 19:52:10,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:10,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-17 19:52:10,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2024-09-17 19:52:10,080 INFO L87 Difference]: Start difference. First operand 47 states and 68 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 19:52:10,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:10,189 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2024-09-17 19:52:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 19:52:10,190 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-17 19:52:10,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:10,191 INFO L225 Difference]: With dead ends: 50 [2024-09-17 19:52:10,191 INFO L226 Difference]: Without dead ends: 48 [2024-09-17 19:52:10,191 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-09-17 19:52:10,192 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:10,193 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:10,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-17 19:52:10,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2024-09-17 19:52:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 34 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2024-09-17 19:52:10,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 67 transitions. [2024-09-17 19:52:10,199 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 67 transitions. Word has length 18 [2024-09-17 19:52:10,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:10,199 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 67 transitions. [2024-09-17 19:52:10,200 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-17 19:52:10,200 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 67 transitions. [2024-09-17 19:52:10,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 19:52:10,201 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:10,201 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] [2024-09-17 19:52:10,218 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 19:52:10,405 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:10,406 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:10,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:10,406 INFO L85 PathProgramCache]: Analyzing trace with hash -578914823, now seen corresponding path program 1 times [2024-09-17 19:52:10,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:10,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594201856] [2024-09-17 19:52:10,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:10,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:10,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:52:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:10,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:10,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 19:52:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-17 19:52:10,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:10,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594201856] [2024-09-17 19:52:10,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594201856] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:10,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119671666] [2024-09-17 19:52:10,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:10,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:10,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:10,783 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) [2024-09-17 19:52:10,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:52:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:10,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 19:52:10,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:52:10,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-17 19:52:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119671666] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:11,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:11,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 24 [2024-09-17 19:52:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66554531] [2024-09-17 19:52:11,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:11,543 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 19:52:11,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:11,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 19:52:11,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:52:11,544 INFO L87 Difference]: Start difference. First operand 47 states and 67 transitions. Second operand has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:52:12,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:12,080 INFO L93 Difference]: Finished difference Result 89 states and 145 transitions. [2024-09-17 19:52:12,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 19:52:12,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 31 [2024-09-17 19:52:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:12,084 INFO L225 Difference]: With dead ends: 89 [2024-09-17 19:52:12,084 INFO L226 Difference]: Without dead ends: 89 [2024-09-17 19:52:12,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=286, Invalid=1120, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 19:52:12,085 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:12,085 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 74 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:52:12,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-17 19:52:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2024-09-17 19:52:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 50 states have (on average 1.16) internal successors, (58), 53 states have internal predecessors, (58), 15 states have call successors, (15), 4 states have call predecessors, (15), 12 states have return successors, (62), 21 states have call predecessors, (62), 14 states have call successors, (62) [2024-09-17 19:52:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 135 transitions. [2024-09-17 19:52:12,098 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 135 transitions. Word has length 31 [2024-09-17 19:52:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:12,099 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 135 transitions. [2024-09-17 19:52:12,099 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 22 states have internal predecessors, (44), 7 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:52:12,099 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 135 transitions. [2024-09-17 19:52:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 19:52:12,101 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:12,101 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:12,118 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:12,304 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-17 19:52:12,305 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:12,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:12,305 INFO L85 PathProgramCache]: Analyzing trace with hash -367364245, now seen corresponding path program 1 times [2024-09-17 19:52:12,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:12,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203185814] [2024-09-17 19:52:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:12,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:12,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:12,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:12,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:12,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:52:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:12,553 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-17 19:52:12,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:12,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203185814] [2024-09-17 19:52:12,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203185814] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:12,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028688140] [2024-09-17 19:52:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:12,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:12,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:12,556 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) [2024-09-17 19:52:12,558 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:52:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:12,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 19:52:12,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-17 19:52:12,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-17 19:52:13,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028688140] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:13,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:13,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 13] total 24 [2024-09-17 19:52:13,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268066357] [2024-09-17 19:52:13,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:13,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 19:52:13,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:13,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 19:52:13,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-09-17 19:52:13,202 INFO L87 Difference]: Start difference. First operand 79 states and 135 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 19:52:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:13,715 INFO L93 Difference]: Finished difference Result 135 states and 288 transitions. [2024-09-17 19:52:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 19:52:13,715 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) Word has length 31 [2024-09-17 19:52:13,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:13,718 INFO L225 Difference]: With dead ends: 135 [2024-09-17 19:52:13,718 INFO L226 Difference]: Without dead ends: 121 [2024-09-17 19:52:13,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 19:52:13,720 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:13,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 66 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:13,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-17 19:52:13,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 68. [2024-09-17 19:52:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.186046511627907) internal successors, (51), 45 states have internal predecessors, (51), 14 states have call successors, (14), 4 states have call predecessors, (14), 10 states have return successors, (47), 18 states have call predecessors, (47), 12 states have call successors, (47) [2024-09-17 19:52:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 112 transitions. [2024-09-17 19:52:13,738 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 112 transitions. Word has length 31 [2024-09-17 19:52:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:13,739 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 112 transitions. [2024-09-17 19:52:13,739 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (5), 1 states have call predecessors, (5), 7 states have return successors, (8), 8 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 19:52:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 112 transitions. [2024-09-17 19:52:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-17 19:52:13,741 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:13,741 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-17 19:52:13,758 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:13,942 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:13,942 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:13,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash -257983826, now seen corresponding path program 2 times [2024-09-17 19:52:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:13,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649997579] [2024-09-17 19:52:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:13,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:14,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:52:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:14,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:14,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:14,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:14,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:52:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:14,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 19:52:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 19:52:14,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:14,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649997579] [2024-09-17 19:52:14,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649997579] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:14,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801790591] [2024-09-17 19:52:14,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:52:14,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:14,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:14,224 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) [2024-09-17 19:52:14,225 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:52:14,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:52:14,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:14,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 19:52:14,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 43 proven. 22 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 19:52:14,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:14,787 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 43 proven. 30 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-17 19:52:14,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801790591] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:14,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:14,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 16 [2024-09-17 19:52:14,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793729958] [2024-09-17 19:52:14,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:14,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 19:52:14,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 19:52:14,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2024-09-17 19:52:14,793 INFO L87 Difference]: Start difference. First operand 68 states and 112 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 7 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (13), 4 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-17 19:52:14,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:14,949 INFO L93 Difference]: Finished difference Result 89 states and 146 transitions. [2024-09-17 19:52:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 19:52:14,949 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 7 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (13), 4 states have call predecessors, (13), 7 states have call successors, (13) Word has length 51 [2024-09-17 19:52:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:14,950 INFO L225 Difference]: With dead ends: 89 [2024-09-17 19:52:14,950 INFO L226 Difference]: Without dead ends: 76 [2024-09-17 19:52:14,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 103 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2024-09-17 19:52:14,951 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:14,951 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 79 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-17 19:52:14,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 66. [2024-09-17 19:52:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 45 states have internal predecessors, (53), 13 states have call successors, (13), 6 states have call predecessors, (13), 8 states have return successors, (36), 14 states have call predecessors, (36), 12 states have call successors, (36) [2024-09-17 19:52:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 102 transitions. [2024-09-17 19:52:14,966 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 102 transitions. Word has length 51 [2024-09-17 19:52:14,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:14,966 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 102 transitions. [2024-09-17 19:52:14,966 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 7 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (13), 4 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-17 19:52:14,966 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 102 transitions. [2024-09-17 19:52:14,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-17 19:52:14,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:14,969 INFO L216 NwaCegarLoop]: trace histogram [12, 10, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-09-17 19:52:14,986 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:15,173 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-17 19:52:15,174 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:15,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:15,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2013581845, now seen corresponding path program 3 times [2024-09-17 19:52:15,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:15,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482610548] [2024-09-17 19:52:15,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:15,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 19:52:15,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:15,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:52:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 19:52:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 19:52:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 78 proven. 89 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-17 19:52:15,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:15,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482610548] [2024-09-17 19:52:15,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482610548] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:15,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092538525] [2024-09-17 19:52:15,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:52:15,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:15,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:15,622 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) [2024-09-17 19:52:15,624 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:52:15,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-17 19:52:15,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:15,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-17 19:52:15,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 91 proven. 75 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2024-09-17 19:52:15,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:16,793 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 97 proven. 72 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-17 19:52:16,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092538525] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:16,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:16,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 18] total 30 [2024-09-17 19:52:16,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569724815] [2024-09-17 19:52:16,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:16,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 19:52:16,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:16,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 19:52:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:52:16,796 INFO L87 Difference]: Start difference. First operand 66 states and 102 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 24 states have internal predecessors, (61), 8 states have call successors, (13), 3 states have call predecessors, (13), 11 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-17 19:52:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:17,950 INFO L93 Difference]: Finished difference Result 97 states and 161 transitions. [2024-09-17 19:52:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-17 19:52:17,951 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 24 states have internal predecessors, (61), 8 states have call successors, (13), 3 states have call predecessors, (13), 11 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 78 [2024-09-17 19:52:17,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:17,952 INFO L225 Difference]: With dead ends: 97 [2024-09-17 19:52:17,952 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 19:52:17,953 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 145 SyntacticMatches, 12 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=742, Invalid=3418, Unknown=0, NotChecked=0, Total=4160 [2024-09-17 19:52:17,953 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:17,954 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 50 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 19:52:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 19:52:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 19:52:17,955 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) [2024-09-17 19:52:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 19:52:17,955 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 78 [2024-09-17 19:52:17,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:17,955 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 19:52:17,956 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 24 states have internal predecessors, (61), 8 states have call successors, (13), 3 states have call predecessors, (13), 11 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-17 19:52:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 19:52:17,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 19:52:17,958 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-17 19:52:17,959 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ackermannErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-17 19:52:17,972 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:18,160 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:18,163 INFO L408 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:18,165 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 19:52:18,167 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 07:52:18 BoogieIcfgContainer [2024-09-17 19:52:18,167 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 19:52:18,168 INFO L158 Benchmark]: Toolchain (without parser) took 12446.92ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 87.2MB in the beginning and 223.8MB in the end (delta: -136.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:18,168 INFO L158 Benchmark]: Witness Parser took 0.20ms. Allocated memory is still 92.3MB. Free memory is still 46.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:18,168 INFO L158 Benchmark]: CDTParser took 0.78ms. Allocated memory is still 155.2MB. Free memory was 123.0MB in the beginning and 122.9MB in the end (delta: 25.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:18,168 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.96ms. Allocated memory is still 155.2MB. Free memory was 87.2MB in the beginning and 122.9MB in the end (delta: -35.6MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2024-09-17 19:52:18,169 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.72ms. Allocated memory is still 155.2MB. Free memory was 122.9MB in the beginning and 121.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:52:18,169 INFO L158 Benchmark]: Boogie Preprocessor took 27.65ms. Allocated memory is still 155.2MB. Free memory was 121.4MB in the beginning and 120.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:18,169 INFO L158 Benchmark]: RCFGBuilder took 293.55ms. Allocated memory is still 155.2MB. Free memory was 120.0MB in the beginning and 106.2MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-17 19:52:18,169 INFO L158 Benchmark]: TraceAbstraction took 11779.78ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 105.6MB in the beginning and 223.8MB in the end (delta: -118.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:18,171 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 0.20ms. Allocated memory is still 92.3MB. Free memory is still 46.2MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.78ms. Allocated memory is still 155.2MB. Free memory was 123.0MB in the beginning and 122.9MB in the end (delta: 25.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 310.96ms. Allocated memory is still 155.2MB. Free memory was 87.2MB in the beginning and 122.9MB in the end (delta: -35.6MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.72ms. Allocated memory is still 155.2MB. Free memory was 122.9MB in the beginning and 121.4MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.65ms. Allocated memory is still 155.2MB. Free memory was 121.4MB in the beginning and 120.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 293.55ms. Allocated memory is still 155.2MB. Free memory was 120.0MB in the beginning and 106.2MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 11779.78ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 105.6MB in the beginning and 223.8MB in the end (delta: -118.2MB). There was no memory consumed. 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: 46]: 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: 17]: 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: 11.7s, OverallIterations: 9, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 380 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 347 mSDsluCounter, 567 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 430 mSDsCounter, 351 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2283 IncrementalHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 351 mSolverCounterUnsat, 137 mSDtfsCounter, 2283 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 649 GetRequests, 416 SyntacticMatches, 22 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1564 ImplicationChecksByTransitivity, 3.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=79occurred in iteration=6, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 106 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 475 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 677 ConstructedInterpolants, 0 QuantifiedInterpolants, 2262 SizeOfPredicates, 12 NumberOfNonLiveVariables, 685 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 21 InterpolantComputations, 4 PerfectInterpolantSequences, 1007/1388 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! [2024-09-17 19:52:18,202 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE