./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann03.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann03.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 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/Ackermann03.c ../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann03.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-04d6fb3-m [2024-09-15 20:24:29,471 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 20:24:29,523 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 20:24:29,527 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 20:24:29,528 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 20:24:29,557 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 20:24:29,557 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 20:24:29,558 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 20:24:29,558 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 20:24:29,558 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 20:24:29,559 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 20:24:29,559 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 20:24:29,559 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 20:24:29,560 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 20:24:29,560 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 20:24:29,560 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 20:24:29,560 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 20:24:29,561 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 20:24:29,561 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 20:24:29,561 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 20:24:29,562 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 20:24:29,566 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 20:24:29,566 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 20:24:29,567 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 20:24:29,567 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 20:24:29,567 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 20:24:29,567 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 20:24:29,568 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 20:24:29,568 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 20:24:29,568 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 20:24:29,568 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 20:24:29,569 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 20:24:29,569 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 20:24:29,569 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 20:24:29,569 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 20:24:29,570 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 20:24:29,570 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 20:24:29,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 20:24:29,571 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 20:24:29,571 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 20:24:29,571 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 20:24:29,572 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 20:24:29,572 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-15 20:24:29,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 20:24:29,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 20:24:29,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 20:24:29,850 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 20:24:29,850 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 20:24:29,851 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/Ackermann03.c [2024-09-15 20:24:31,318 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 20:24:31,552 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 20:24:31,556 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann03.c [2024-09-15 20:24:31,564 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c00882a19/8561582ef2cb422c98e5ab3d3e937d2a/FLAGf8c19d3ed [2024-09-15 20:24:31,892 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c00882a19/8561582ef2cb422c98e5ab3d3e937d2a [2024-09-15 20:24:31,894 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-15 20:24:31,895 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-15 20:24:31,896 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann03.yml/witness-2.1.yml [2024-09-15 20:24:31,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 20:24:31,941 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-15 20:24:31,942 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 20:24:31,943 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 20:24:31,947 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 20:24:31,948 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 08:24:31" (1/2) ... [2024-09-15 20:24:31,951 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e108a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:31, skipping insertion in model container [2024-09-15 20:24:31,951 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 08:24:31" (1/2) ... [2024-09-15 20:24:31,952 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6d21461e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:31, skipping insertion in model container [2024-09-15 20:24:31,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 15.09 08:24:31" (2/2) ... [2024-09-15 20:24:31,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43e108a and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:31, skipping insertion in model container [2024-09-15 20:24:31,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 15.09 08:24:31" (2/2) ... [2024-09-15 20:24:31,958 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-15 20:24:31,961 INFO L1541 ArrayList]: Function contract at [L16]: requires null, ensures (((((((((((((((((\result == 5) && (\old(n) == 3)) || (((\result == 3) && (\old(n) == 1)) && (\old(m) == 1))) || (\old(m) == 0)) || (((2 <= \old(m)) && (3 <= \old(n))) && (5 <= \result))) || (((\old(n) == 0) && (\result == 2)) && (\old(m) == 1))) || (((2 <= \old(m)) && (2 <= \old(n))) && (\result == 7))) || ((\result == 5) && (\old(n) == 1))) || (((\result == 7) && (5 <= \old(n))) && (\old(m) == 1))) || (((\old(n) == 0) && (2 <= \old(m))) && (\result == 3))) || ((\result == 6) && (\old(n) == 4))) || (((5 <= \result) && (6 <= \old(n))) && (\old(m) == 1))) || (((\result == 4) && (\old(n) == 2)) && (\old(m) == 1))) || ((3 <= \old(m)) && (3 <= \result))) && ((0 < \old(m)) || (\result == ((long long) \old(n) + 1)))) && (((((\result == 3) && (\old(m) == 1)) || (1 < \old(m))) || (\result == 2)) || (\old(n) != 1))) && (((\old(m) == 0) || (\old(n) == 0)) || (0 < \old(n)))) [2024-09-15 20:24:31,977 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 20:24:32,105 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2024-09-15 20:24:32,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 20:24:32,121 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-15 20:24:32,166 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann03.c[1168,1181] [2024-09-15 20:24:32,167 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 20:24:32,179 INFO L204 MainTranslator]: Completed translation [2024-09-15 20:24:32,179 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32 WrapperNode [2024-09-15 20:24:32,180 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 20:24:32,181 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 20:24:32,181 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 20:24:32,181 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 20:24:32,186 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,190 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,204 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-09-15 20:24:32,205 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 20:24:32,205 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 20:24:32,205 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 20:24:32,206 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 20:24:32,213 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,213 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,218 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,224 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 [2024-09-15 20:24:32,224 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,224 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,227 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,229 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,231 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,233 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 20:24:32,238 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 20:24:32,238 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 20:24:32,238 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 20:24:32,238 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (1/1) ... [2024-09-15 20:24:32,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 20:24:32,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:32,270 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) [2024-09-15 20:24:32,272 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 [2024-09-15 20:24:32,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 20:24:32,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 20:24:32,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 20:24:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-09-15 20:24:32,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-09-15 20:24:32,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-15 20:24:32,401 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 20:24:32,402 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 20:24:32,600 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-15 20:24:32,600 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 20:24:32,620 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 20:24:32,622 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-15 20:24:32,622 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 08:24:32 BoogieIcfgContainer [2024-09-15 20:24:32,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 20:24:32,624 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 20:24:32,624 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 20:24:32,627 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 20:24:32,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 08:24:31" (1/4) ... [2024-09-15 20:24:32,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db129fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 08:24:32, skipping insertion in model container [2024-09-15 20:24:32,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 15.09 08:24:31" (2/4) ... [2024-09-15 20:24:32,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db129fd and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 15.09 08:24:32, skipping insertion in model container [2024-09-15 20:24:32,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:32" (3/4) ... [2024-09-15 20:24:32,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db129fd and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 15.09 08:24:32, skipping insertion in model container [2024-09-15 20:24:32,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 08:24:32" (4/4) ... [2024-09-15 20:24:32,630 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2024-09-15 20:24:32,642 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 20:24:32,642 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-15 20:24:32,681 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 20:24:32,687 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;@6f5955ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 20:24:32,687 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-15 20:24:32,690 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) [2024-09-15 20:24:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-09-15 20:24:32,694 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:32,695 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:32,695 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:32,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:32,701 INFO L85 PathProgramCache]: Analyzing trace with hash -26348941, now seen corresponding path program 1 times [2024-09-15 20:24:32,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:32,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431311128] [2024-09-15 20:24:32,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:32,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:33,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:33,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:33,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431311128] [2024-09-15 20:24:33,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431311128] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:33,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:33,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 20:24:33,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562832081] [2024-09-15 20:24:33,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:33,070 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 20:24:33,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:33,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 20:24:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 20:24:33,090 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) [2024-09-15 20:24:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:33,190 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-15 20:24:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 20:24:33,192 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 [2024-09-15 20:24:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:33,197 INFO L225 Difference]: With dead ends: 39 [2024-09-15 20:24:33,197 INFO L226 Difference]: Without dead ends: 36 [2024-09-15 20:24:33,200 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 20:24:33,202 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:33,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:24:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-15 20:24:33,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2024-09-15 20:24:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-15 20:24:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-09-15 20:24:33,229 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 7 [2024-09-15 20:24:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:33,230 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-09-15 20:24:33,230 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) [2024-09-15 20:24:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-09-15 20:24:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 20:24:33,231 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:33,231 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:33,231 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 20:24:33,231 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:33,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1506041859, now seen corresponding path program 1 times [2024-09-15 20:24:33,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:33,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008054193] [2024-09-15 20:24:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:33,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:33,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:33,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008054193] [2024-09-15 20:24:33,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008054193] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:33,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:33,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 20:24:33,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081835130] [2024-09-15 20:24:33,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:33,396 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:24:33,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:24:33,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:24:33,396 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:33,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:33,465 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-09-15 20:24:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:24:33,465 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 [2024-09-15 20:24:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:33,466 INFO L225 Difference]: With dead ends: 42 [2024-09-15 20:24:33,468 INFO L226 Difference]: Without dead ends: 42 [2024-09-15 20:24:33,468 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 [2024-09-15 20:24:33,469 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:33,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 56 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:24:33,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-15 20:24:33,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-09-15 20:24:33,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 28 states have internal predecessors, (35), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-15 20:24:33,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-09-15 20:24:33,478 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 11 [2024-09-15 20:24:33,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:33,479 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-09-15 20:24:33,479 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) [2024-09-15 20:24:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-09-15 20:24:33,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 20:24:33,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:33,479 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:33,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 20:24:33,480 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:33,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:33,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1508872004, now seen corresponding path program 1 times [2024-09-15 20:24:33,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:33,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577524555] [2024-09-15 20:24:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:33,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:33,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577524555] [2024-09-15 20:24:33,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577524555] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:33,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:33,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 20:24:33,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561794841] [2024-09-15 20:24:33,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:33,553 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 20:24:33,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:33,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 20:24:33,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 20:24:33,554 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:33,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:33,607 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2024-09-15 20:24:33,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:24:33,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-15 20:24:33,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:33,609 INFO L225 Difference]: With dead ends: 57 [2024-09-15 20:24:33,610 INFO L226 Difference]: Without dead ends: 57 [2024-09-15 20:24:33,610 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:24:33,611 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:33,613 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 69 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:24:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-15 20:24:33,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-09-15 20:24:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 37 states have internal predecessors, (46), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2024-09-15 20:24:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 73 transitions. [2024-09-15 20:24:33,626 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 73 transitions. Word has length 11 [2024-09-15 20:24:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:33,627 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 73 transitions. [2024-09-15 20:24:33,627 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:33,627 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 73 transitions. [2024-09-15 20:24:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 20:24:33,627 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:33,627 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:33,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 20:24:33,628 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:33,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1484759222, now seen corresponding path program 1 times [2024-09-15 20:24:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:33,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71523000] [2024-09-15 20:24:33,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:33,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:33,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:33,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:33,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71523000] [2024-09-15 20:24:33,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71523000] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:33,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:33,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 20:24:33,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665848670] [2024-09-15 20:24:33,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:33,707 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:24:33,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:33,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:24:33,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:24:33,708 INFO L87 Difference]: Start difference. First operand 53 states and 73 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 20:24:33,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:33,753 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2024-09-15 20:24:33,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:24:33,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-15 20:24:33,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:33,755 INFO L225 Difference]: With dead ends: 58 [2024-09-15 20:24:33,755 INFO L226 Difference]: Without dead ends: 54 [2024-09-15 20:24:33,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:24:33,756 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:33,756 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:24:33,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-15 20:24:33,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2024-09-15 20:24:33,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 36 states have internal predecessors, (44), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2024-09-15 20:24:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2024-09-15 20:24:33,763 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 11 [2024-09-15 20:24:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:33,764 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2024-09-15 20:24:33,764 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 20:24:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2024-09-15 20:24:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 20:24:33,764 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:33,764 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:33,765 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-15 20:24:33,765 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:33,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:33,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1264662995, now seen corresponding path program 1 times [2024-09-15 20:24:33,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:33,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321805104] [2024-09-15 20:24:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:33,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:33,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-15 20:24:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:34,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:34,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321805104] [2024-09-15 20:24:34,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321805104] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:34,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207418892] [2024-09-15 20:24:34,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:34,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:34,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:34,088 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) [2024-09-15 20:24:34,091 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 20:24:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:34,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-15 20:24:34,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:34,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:34,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 20:24:35,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207418892] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:35,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:35,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2024-09-15 20:24:35,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942713012] [2024-09-15 20:24:35,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:35,286 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 20:24:35,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 20:24:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-15 20:24:35,289 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 20:24:35,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:35,911 INFO L93 Difference]: Finished difference Result 76 states and 118 transitions. [2024-09-15 20:24:35,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 20:24:35,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 14 [2024-09-15 20:24:35,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:35,913 INFO L225 Difference]: With dead ends: 76 [2024-09-15 20:24:35,914 INFO L226 Difference]: Without dead ends: 76 [2024-09-15 20:24:35,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2024-09-15 20:24:35,915 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:35,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 85 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:24:35,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-15 20:24:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2024-09-15 20:24:35,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 11 states have call predecessors, (16), 11 states have call successors, (16) [2024-09-15 20:24:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2024-09-15 20:24:35,932 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 72 transitions. Word has length 14 [2024-09-15 20:24:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:35,932 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 72 transitions. [2024-09-15 20:24:35,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 20:24:35,932 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 72 transitions. [2024-09-15 20:24:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 20:24:35,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:35,934 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:35,957 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 20:24:36,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:36,135 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:36,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:36,137 INFO L85 PathProgramCache]: Analyzing trace with hash -507496426, now seen corresponding path program 1 times [2024-09-15 20:24:36,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:36,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951282394] [2024-09-15 20:24:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:36,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:24:36,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:36,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951282394] [2024-09-15 20:24:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951282394] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:36,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553822419] [2024-09-15 20:24:36,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:36,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:36,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:36,216 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) [2024-09-15 20:24:36,217 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 20:24:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-15 20:24:36,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:24:36,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:24:36,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553822419] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:36,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:36,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-09-15 20:24:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306134974] [2024-09-15 20:24:36,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:36,327 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 20:24:36,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:36,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 20:24:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-15 20:24:36,328 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-15 20:24:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:36,432 INFO L93 Difference]: Finished difference Result 77 states and 120 transitions. [2024-09-15 20:24:36,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 20:24:36,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 18 [2024-09-15 20:24:36,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:36,434 INFO L225 Difference]: With dead ends: 77 [2024-09-15 20:24:36,434 INFO L226 Difference]: Without dead ends: 72 [2024-09-15 20:24:36,434 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-15 20:24:36,435 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:36,435 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 54 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:24:36,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-15 20:24:36,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2024-09-15 20:24:36,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 12 states have call successors, (12), 4 states have call predecessors, (12), 5 states have return successors, (16), 13 states have call predecessors, (16), 12 states have call successors, (16) [2024-09-15 20:24:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 75 transitions. [2024-09-15 20:24:36,441 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 75 transitions. Word has length 18 [2024-09-15 20:24:36,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:36,442 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 75 transitions. [2024-09-15 20:24:36,442 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-15 20:24:36,442 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 75 transitions. [2024-09-15 20:24:36,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 20:24:36,443 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:36,443 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] [2024-09-15 20:24:36,456 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 20:24:36,643 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 20:24:36,644 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:36,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:36,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1491759416, now seen corresponding path program 1 times [2024-09-15 20:24:36,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:36,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989922373] [2024-09-15 20:24:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:36,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 20:24:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 20:24:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 20:24:37,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989922373] [2024-09-15 20:24:37,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989922373] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:37,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923698790] [2024-09-15 20:24:37,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:37,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:37,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:37,098 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) [2024-09-15 20:24:37,102 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 20:24:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-15 20:24:37,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 20:24:37,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 20:24:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923698790] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:38,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:38,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-09-15 20:24:38,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662866338] [2024-09-15 20:24:38,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:38,556 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 20:24:38,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:38,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 20:24:38,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-09-15 20:24:38,557 INFO L87 Difference]: Start difference. First operand 57 states and 75 transitions. Second operand has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-15 20:24:40,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:40,248 INFO L93 Difference]: Finished difference Result 133 states and 232 transitions. [2024-09-15 20:24:40,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 20:24:40,249 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 31 [2024-09-15 20:24:40,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:40,251 INFO L225 Difference]: With dead ends: 133 [2024-09-15 20:24:40,251 INFO L226 Difference]: Without dead ends: 129 [2024-09-15 20:24:40,252 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=433, Invalid=2117, Unknown=0, NotChecked=0, Total=2550 [2024-09-15 20:24:40,253 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 128 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:40,257 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 85 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 20:24:40,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-09-15 20:24:40,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2024-09-15 20:24:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 68 states have (on average 1.161764705882353) internal successors, (79), 66 states have internal predecessors, (79), 19 states have call successors, (19), 6 states have call predecessors, (19), 13 states have return successors, (61), 29 states have call predecessors, (61), 19 states have call successors, (61) [2024-09-15 20:24:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 159 transitions. [2024-09-15 20:24:40,273 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 159 transitions. Word has length 31 [2024-09-15 20:24:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:40,276 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 159 transitions. [2024-09-15 20:24:40,276 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.826086956521739) internal successors, (42), 21 states have internal predecessors, (42), 8 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-15 20:24:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 159 transitions. [2024-09-15 20:24:40,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-15 20:24:40,278 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:40,278 INFO L216 NwaCegarLoop]: trace histogram [10, 7, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-15 20:24:40,303 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 20:24:40,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-15 20:24:40,480 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:40,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1840574351, now seen corresponding path program 2 times [2024-09-15 20:24:40,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:40,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522062275] [2024-09-15 20:24:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:40,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:40,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-15 20:24:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:40,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:40,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:40,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:40,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:40,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:40,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:40,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-15 20:24:40,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 56 proven. 28 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-09-15 20:24:40,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522062275] [2024-09-15 20:24:40,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522062275] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:40,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470691401] [2024-09-15 20:24:40,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:24:40,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:40,817 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) [2024-09-15 20:24:40,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 20:24:40,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 20:24:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:40,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 20:24:40,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 69 proven. 49 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-15 20:24:40,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 42 proven. 58 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 20:24:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470691401] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:41,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:41,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 19 [2024-09-15 20:24:41,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368552053] [2024-09-15 20:24:41,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:41,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 20:24:41,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:41,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 20:24:41,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-09-15 20:24:41,095 INFO L87 Difference]: Start difference. First operand 102 states and 159 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 15 states have internal predecessors, (52), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-15 20:24:41,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:41,567 INFO L93 Difference]: Finished difference Result 152 states and 275 transitions. [2024-09-15 20:24:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 20:24:41,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 15 states have internal predecessors, (52), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) Word has length 59 [2024-09-15 20:24:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:41,569 INFO L225 Difference]: With dead ends: 152 [2024-09-15 20:24:41,569 INFO L226 Difference]: Without dead ends: 147 [2024-09-15 20:24:41,570 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 117 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 20:24:41,570 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 92 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:41,570 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 133 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:24:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-15 20:24:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2024-09-15 20:24:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 76 states have internal predecessors, (92), 22 states have call successors, (22), 7 states have call predecessors, (22), 15 states have return successors, (65), 36 states have call predecessors, (65), 22 states have call successors, (65) [2024-09-15 20:24:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 179 transitions. [2024-09-15 20:24:41,585 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 179 transitions. Word has length 59 [2024-09-15 20:24:41,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:41,585 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 179 transitions. [2024-09-15 20:24:41,585 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 15 states have internal predecessors, (52), 10 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (14), 6 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-15 20:24:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 179 transitions. [2024-09-15 20:24:41,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 20:24:41,587 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:41,587 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:41,600 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 20:24:41,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:41,792 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:41,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash -506552652, now seen corresponding path program 1 times [2024-09-15 20:24:41,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:41,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823367574] [2024-09-15 20:24:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:41,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:41,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:41,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:41,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:41,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:41,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:41,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:42,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-15 20:24:42,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:42,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823367574] [2024-09-15 20:24:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823367574] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:42,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981214930] [2024-09-15 20:24:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:42,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:42,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:42,019 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) [2024-09-15 20:24:42,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 20:24:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 20:24:42,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-15 20:24:42,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-15 20:24:42,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981214930] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:42,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:42,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2024-09-15 20:24:42,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325648847] [2024-09-15 20:24:42,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:42,431 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 20:24:42,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:42,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 20:24:42,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-09-15 20:24:42,432 INFO L87 Difference]: Start difference. First operand 120 states and 179 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-15 20:24:42,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:42,505 INFO L93 Difference]: Finished difference Result 144 states and 195 transitions. [2024-09-15 20:24:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 20:24:42,505 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2024-09-15 20:24:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:42,508 INFO L225 Difference]: With dead ends: 144 [2024-09-15 20:24:42,508 INFO L226 Difference]: Without dead ends: 121 [2024-09-15 20:24:42,508 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-09-15 20:24:42,509 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:42,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 73 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:24:42,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-15 20:24:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 100. [2024-09-15 20:24:42,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 65 states have internal predecessors, (75), 20 states have call successors, (20), 6 states have call predecessors, (20), 12 states have return successors, (34), 28 states have call predecessors, (34), 20 states have call successors, (34) [2024-09-15 20:24:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 129 transitions. [2024-09-15 20:24:42,529 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 129 transitions. Word has length 44 [2024-09-15 20:24:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:42,529 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 129 transitions. [2024-09-15 20:24:42,530 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-15 20:24:42,530 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 129 transitions. [2024-09-15 20:24:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-15 20:24:42,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:42,531 INFO L216 NwaCegarLoop]: trace histogram [10, 7, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:42,547 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 20:24:42,731 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:42,732 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:42,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:42,732 INFO L85 PathProgramCache]: Analyzing trace with hash -585932244, now seen corresponding path program 3 times [2024-09-15 20:24:42,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:42,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452194698] [2024-09-15 20:24:42,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:42,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 20:24:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:43,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-15 20:24:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 36 proven. 71 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-15 20:24:43,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:43,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452194698] [2024-09-15 20:24:43,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452194698] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:43,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866359056] [2024-09-15 20:24:43,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 20:24:43,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:43,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:43,682 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) [2024-09-15 20:24:43,688 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 20:24:43,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-15 20:24:43,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:43,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-15 20:24:43,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:44,062 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2024-09-15 20:24:44,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 44 proven. 81 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-15 20:24:46,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866359056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:46,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:46,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 25] total 47 [2024-09-15 20:24:46,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472682326] [2024-09-15 20:24:46,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:46,057 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 20:24:46,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:46,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 20:24:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1976, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 20:24:46,059 INFO L87 Difference]: Start difference. First operand 100 states and 129 transitions. Second operand has 48 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 40 states have internal predecessors, (76), 17 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-15 20:24:47,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:47,755 INFO L93 Difference]: Finished difference Result 152 states and 224 transitions. [2024-09-15 20:24:47,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-15 20:24:47,756 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 40 states have internal predecessors, (76), 17 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) Word has length 61 [2024-09-15 20:24:47,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:47,759 INFO L225 Difference]: With dead ends: 152 [2024-09-15 20:24:47,759 INFO L226 Difference]: Without dead ends: 144 [2024-09-15 20:24:47,760 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=796, Invalid=4460, Unknown=0, NotChecked=0, Total=5256 [2024-09-15 20:24:47,761 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:47,762 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 109 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 20:24:47,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-15 20:24:47,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2024-09-15 20:24:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 72 states have (on average 1.125) internal successors, (81), 71 states have internal predecessors, (81), 22 states have call successors, (22), 6 states have call predecessors, (22), 14 states have return successors, (40), 32 states have call predecessors, (40), 22 states have call successors, (40) [2024-09-15 20:24:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 143 transitions. [2024-09-15 20:24:47,776 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 143 transitions. Word has length 61 [2024-09-15 20:24:47,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:47,776 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 143 transitions. [2024-09-15 20:24:47,777 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 40 states have internal predecessors, (76), 17 states have call successors, (18), 1 states have call predecessors, (18), 12 states have return successors, (21), 15 states have call predecessors, (21), 16 states have call successors, (21) [2024-09-15 20:24:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 143 transitions. [2024-09-15 20:24:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-15 20:24:47,778 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:47,778 INFO L216 NwaCegarLoop]: trace histogram [10, 7, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-15 20:24:47,796 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 20:24:47,984 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 20:24:47,985 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:47,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:47,985 INFO L85 PathProgramCache]: Analyzing trace with hash -704301563, now seen corresponding path program 4 times [2024-09-15 20:24:47,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:47,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142908505] [2024-09-15 20:24:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:48,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 20:24:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:48,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:48,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:48,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:48,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:48,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:48,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-15 20:24:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:48,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 43 proven. 40 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-15 20:24:48,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:48,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142908505] [2024-09-15 20:24:48,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142908505] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:48,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323641859] [2024-09-15 20:24:48,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 20:24:48,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:48,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:48,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:24:48,296 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 20:24:48,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 20:24:48,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:48,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-15 20:24:48,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 47 proven. 59 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-15 20:24:48,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:48,769 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 47 proven. 61 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-09-15 20:24:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323641859] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:48,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:48,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 13] total 31 [2024-09-15 20:24:48,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298197865] [2024-09-15 20:24:48,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:48,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-15 20:24:48,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:48,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-15 20:24:48,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2024-09-15 20:24:48,771 INFO L87 Difference]: Start difference. First operand 110 states and 143 transitions. Second operand has 31 states, 25 states have (on average 2.48) internal successors, (62), 28 states have internal predecessors, (62), 11 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-15 20:24:49,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:49,233 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2024-09-15 20:24:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 20:24:49,233 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.48) internal successors, (62), 28 states have internal predecessors, (62), 11 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) Word has length 62 [2024-09-15 20:24:49,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:49,234 INFO L225 Difference]: With dead ends: 134 [2024-09-15 20:24:49,234 INFO L226 Difference]: Without dead ends: 125 [2024-09-15 20:24:49,235 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=492, Invalid=2160, Unknown=0, NotChecked=0, Total=2652 [2024-09-15 20:24:49,235 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:49,235 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 91 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:24:49,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-15 20:24:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2024-09-15 20:24:49,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 22 states have call successors, (22), 6 states have call predecessors, (22), 14 states have return successors, (38), 31 states have call predecessors, (38), 21 states have call successors, (38) [2024-09-15 20:24:49,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 140 transitions. [2024-09-15 20:24:49,255 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 140 transitions. Word has length 62 [2024-09-15 20:24:49,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:49,256 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 140 transitions. [2024-09-15 20:24:49,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.48) internal successors, (62), 28 states have internal predecessors, (62), 11 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (19), 12 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-15 20:24:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 140 transitions. [2024-09-15 20:24:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-15 20:24:49,257 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:49,257 INFO L216 NwaCegarLoop]: trace histogram [11, 9, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-09-15 20:24:49,280 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 20:24:49,457 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:49,458 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:49,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash 258141017, now seen corresponding path program 5 times [2024-09-15 20:24:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:49,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271378233] [2024-09-15 20:24:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:49,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 20:24:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:50,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:50,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 20:24:50,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:50,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:50,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:50,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:50,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:50,251 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 59 proven. 78 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2024-09-15 20:24:50,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:50,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271378233] [2024-09-15 20:24:50,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271378233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:50,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619751389] [2024-09-15 20:24:50,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 20:24:50,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:50,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:50,253 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:24:50,255 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 20:24:50,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-15 20:24:50,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:50,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 20:24:50,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:50,436 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 59 proven. 71 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2024-09-15 20:24:50,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 77 proven. 61 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2024-09-15 20:24:51,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619751389] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:51,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:51,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 16] total 28 [2024-09-15 20:24:51,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244428102] [2024-09-15 20:24:51,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:51,247 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 20:24:51,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:51,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 20:24:51,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2024-09-15 20:24:51,248 INFO L87 Difference]: Start difference. First operand 109 states and 140 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 12 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-15 20:24:51,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:51,645 INFO L93 Difference]: Finished difference Result 126 states and 162 transitions. [2024-09-15 20:24:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 20:24:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 12 states have call predecessors, (18), 10 states have call successors, (18) Word has length 71 [2024-09-15 20:24:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:51,648 INFO L225 Difference]: With dead ends: 126 [2024-09-15 20:24:51,649 INFO L226 Difference]: Without dead ends: 121 [2024-09-15 20:24:51,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=366, Invalid=1704, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 20:24:51,653 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:51,653 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 86 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:24:51,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-15 20:24:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2024-09-15 20:24:51,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 22 states have call successors, (22), 6 states have call predecessors, (22), 14 states have return successors, (37), 31 states have call predecessors, (37), 21 states have call successors, (37) [2024-09-15 20:24:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 139 transitions. [2024-09-15 20:24:51,666 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 139 transitions. Word has length 71 [2024-09-15 20:24:51,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:51,666 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 139 transitions. [2024-09-15 20:24:51,667 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (12), 1 states have call predecessors, (12), 11 states have return successors, (18), 12 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-15 20:24:51,667 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 139 transitions. [2024-09-15 20:24:51,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-15 20:24:51,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:51,667 INFO L216 NwaCegarLoop]: trace histogram [15, 13, 9, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-09-15 20:24:51,681 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 20:24:51,868 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:51,869 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:51,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:51,869 INFO L85 PathProgramCache]: Analyzing trace with hash 400355383, now seen corresponding path program 6 times [2024-09-15 20:24:51,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:51,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398862059] [2024-09-15 20:24:51,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:51,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:52,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 20:24:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:52,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:52,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:52,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:52,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:52,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 20:24:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:52,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:52,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:52,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:53,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:53,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:53,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:53,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:53,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:24:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 69 proven. 234 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2024-09-15 20:24:53,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:53,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398862059] [2024-09-15 20:24:53,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398862059] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:53,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858011786] [2024-09-15 20:24:53,123 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 20:24:53,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:53,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:53,125 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:24:53,126 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 20:24:53,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-15 20:24:53,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:53,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-15 20:24:53,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:53,352 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 98 proven. 197 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-15 20:24:53,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 102 proven. 214 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2024-09-15 20:24:54,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858011786] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:54,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:54,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 31] total 46 [2024-09-15 20:24:54,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744323649] [2024-09-15 20:24:54,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:54,692 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-15 20:24:54,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:54,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-15 20:24:54,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=1918, Unknown=0, NotChecked=0, Total=2162 [2024-09-15 20:24:54,694 INFO L87 Difference]: Start difference. First operand 109 states and 139 transitions. Second operand has 47 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 16 states have call successors, (21), 1 states have call predecessors, (21), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) [2024-09-15 20:25:02,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:02,013 INFO L93 Difference]: Finished difference Result 375 states and 667 transitions. [2024-09-15 20:25:02,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-09-15 20:25:02,014 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 16 states have call successors, (21), 1 states have call predecessors, (21), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) Word has length 97 [2024-09-15 20:25:02,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:02,016 INFO L225 Difference]: With dead ends: 375 [2024-09-15 20:25:02,016 INFO L226 Difference]: Without dead ends: 348 [2024-09-15 20:25:02,021 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 213 SyntacticMatches, 2 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7700 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4772, Invalid=23620, Unknown=0, NotChecked=0, Total=28392 [2024-09-15 20:25:02,022 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 260 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 4044 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 4044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:02,022 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 243 Invalid, 4505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 4044 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-15 20:25:02,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2024-09-15 20:25:02,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 199. [2024-09-15 20:25:02,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 126 states have internal predecessors, (155), 37 states have call successors, (37), 11 states have call predecessors, (37), 25 states have return successors, (137), 61 states have call predecessors, (137), 35 states have call successors, (137) [2024-09-15 20:25:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 329 transitions. [2024-09-15 20:25:02,038 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 329 transitions. Word has length 97 [2024-09-15 20:25:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:02,038 INFO L474 AbstractCegarLoop]: Abstraction has 199 states and 329 transitions. [2024-09-15 20:25:02,039 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 16 states have call successors, (21), 1 states have call predecessors, (21), 15 states have return successors, (28), 16 states have call predecessors, (28), 16 states have call successors, (28) [2024-09-15 20:25:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 329 transitions. [2024-09-15 20:25:02,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-15 20:25:02,040 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:02,040 INFO L216 NwaCegarLoop]: trace histogram [17, 15, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-09-15 20:25:02,061 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-15 20:25:02,244 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 20:25:02,245 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:02,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:02,245 INFO L85 PathProgramCache]: Analyzing trace with hash 914157467, now seen corresponding path program 7 times [2024-09-15 20:25:02,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:02,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270926324] [2024-09-15 20:25:02,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 20:25:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 20:25:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:03,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:25:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:25:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 20:25:03,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 151 proven. 223 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2024-09-15 20:25:03,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:03,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270926324] [2024-09-15 20:25:03,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270926324] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:03,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859069964] [2024-09-15 20:25:03,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 20:25:03,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:03,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:03,094 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:03,096 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 20:25:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-15 20:25:03,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:03,302 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 159 proven. 196 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-09-15 20:25:03,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 175 proven. 217 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2024-09-15 20:25:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859069964] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:04,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:04,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 21] total 29 [2024-09-15 20:25:04,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016713716] [2024-09-15 20:25:04,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:04,444 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-15 20:25:04,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-15 20:25:04,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2024-09-15 20:25:04,445 INFO L87 Difference]: Start difference. First operand 199 states and 329 transitions. Second operand has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 26 states have internal predecessors, (69), 15 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (27), 12 states have call predecessors, (27), 15 states have call successors, (27) [2024-09-15 20:25:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:05,071 INFO L93 Difference]: Finished difference Result 324 states and 793 transitions. [2024-09-15 20:25:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 20:25:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 26 states have internal predecessors, (69), 15 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (27), 12 states have call predecessors, (27), 15 states have call successors, (27) Word has length 110 [2024-09-15 20:25:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:05,074 INFO L225 Difference]: With dead ends: 324 [2024-09-15 20:25:05,074 INFO L226 Difference]: Without dead ends: 324 [2024-09-15 20:25:05,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 233 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1782, Unknown=0, NotChecked=0, Total=2162 [2024-09-15 20:25:05,075 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 80 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:05,075 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 154 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 20:25:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-09-15 20:25:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 271. [2024-09-15 20:25:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 185 states have (on average 1.162162162162162) internal successors, (215), 168 states have internal predecessors, (215), 47 states have call successors, (47), 11 states have call predecessors, (47), 37 states have return successors, (339), 91 states have call predecessors, (339), 45 states have call successors, (339) [2024-09-15 20:25:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 601 transitions. [2024-09-15 20:25:05,101 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 601 transitions. Word has length 110 [2024-09-15 20:25:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:05,101 INFO L474 AbstractCegarLoop]: Abstraction has 271 states and 601 transitions. [2024-09-15 20:25:05,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4642857142857144) internal successors, (69), 26 states have internal predecessors, (69), 15 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (27), 12 states have call predecessors, (27), 15 states have call successors, (27) [2024-09-15 20:25:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 601 transitions. [2024-09-15 20:25:05,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-15 20:25:05,103 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:05,104 INFO L216 NwaCegarLoop]: trace histogram [14, 11, 9, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-09-15 20:25:05,117 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-15 20:25:05,304 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 20:25:05,305 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:05,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:05,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1379601416, now seen corresponding path program 8 times [2024-09-15 20:25:05,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:05,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592458805] [2024-09-15 20:25:05,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:05,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:05,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 20:25:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:05,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:05,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-15 20:25:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:25:05,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 90 proven. 125 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-09-15 20:25:05,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592458805] [2024-09-15 20:25:05,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592458805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:05,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144043227] [2024-09-15 20:25:05,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:25:05,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:05,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:05,783 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:05,790 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 20:25:05,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 20:25:05,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:05,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-15 20:25:05,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 90 proven. 114 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-15 20:25:05,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 106 proven. 112 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2024-09-15 20:25:06,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144043227] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:06,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:06,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 17] total 25 [2024-09-15 20:25:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776780435] [2024-09-15 20:25:06,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:06,651 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 20:25:06,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:06,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 20:25:06,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-15 20:25:06,652 INFO L87 Difference]: Start difference. First operand 271 states and 601 transitions. Second operand has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 11 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-15 20:25:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:07,117 INFO L93 Difference]: Finished difference Result 174 states and 261 transitions. [2024-09-15 20:25:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-15 20:25:07,118 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 11 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) Word has length 88 [2024-09-15 20:25:07,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:07,119 INFO L225 Difference]: With dead ends: 174 [2024-09-15 20:25:07,119 INFO L226 Difference]: Without dead ends: 167 [2024-09-15 20:25:07,120 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 184 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=432, Invalid=1730, Unknown=0, NotChecked=0, Total=2162 [2024-09-15 20:25:07,120 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:07,120 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 81 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:25:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-15 20:25:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2024-09-15 20:25:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 99 states have (on average 1.1414141414141414) internal successors, (113), 97 states have internal predecessors, (113), 30 states have call successors, (30), 6 states have call predecessors, (30), 22 states have return successors, (83), 49 states have call predecessors, (83), 29 states have call successors, (83) [2024-09-15 20:25:07,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 226 transitions. [2024-09-15 20:25:07,127 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 226 transitions. Word has length 88 [2024-09-15 20:25:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:07,127 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 226 transitions. [2024-09-15 20:25:07,127 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.375) internal successors, (57), 22 states have internal predecessors, (57), 11 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (19), 10 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-15 20:25:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 226 transitions. [2024-09-15 20:25:07,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-15 20:25:07,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:07,128 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:07,142 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 20:25:07,332 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 20:25:07,333 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:07,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash -120782228, now seen corresponding path program 9 times [2024-09-15 20:25:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:07,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876096588] [2024-09-15 20:25:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:07,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-15 20:25:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:08,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:08,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:25:08,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:25:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 20:25:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 20:25:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 12 proven. 172 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-15 20:25:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876096588] [2024-09-15 20:25:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876096588] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964027563] [2024-09-15 20:25:08,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 20:25:08,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:08,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:08,954 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:08,957 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 20:25:09,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-15 20:25:09,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:09,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-15 20:25:09,041 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 61 proven. 32 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2024-09-15 20:25:09,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:11,239 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 12 [2024-09-15 20:25:18,718 WARN L293 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 438 DAG size of output: 58 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-15 20:25:21,649 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-15 20:25:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964027563] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:21,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:21,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 11, 8] total 41 [2024-09-15 20:25:21,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611186449] [2024-09-15 20:25:21,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:21,651 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-15 20:25:21,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-15 20:25:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1569, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 20:25:21,656 INFO L87 Difference]: Start difference. First operand 153 states and 226 transitions. Second operand has 42 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 14 states have call successors, (17), 2 states have call predecessors, (17), 11 states have return successors, (18), 16 states have call predecessors, (18), 13 states have call successors, (18) [2024-09-15 20:25:24,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:24,053 INFO L93 Difference]: Finished difference Result 198 states and 311 transitions. [2024-09-15 20:25:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-15 20:25:24,053 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 14 states have call successors, (17), 2 states have call predecessors, (17), 11 states have return successors, (18), 16 states have call predecessors, (18), 13 states have call successors, (18) Word has length 79 [2024-09-15 20:25:24,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:24,058 INFO L225 Difference]: With dead ends: 198 [2024-09-15 20:25:24,058 INFO L226 Difference]: Without dead ends: 180 [2024-09-15 20:25:24,059 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=684, Invalid=5016, Unknown=0, NotChecked=0, Total=5700 [2024-09-15 20:25:24,059 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:24,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 108 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 20:25:24,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-15 20:25:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2024-09-15 20:25:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 90 states have internal predecessors, (91), 27 states have call successors, (27), 8 states have call predecessors, (27), 22 states have return successors, (61), 39 states have call predecessors, (61), 27 states have call successors, (61) [2024-09-15 20:25:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2024-09-15 20:25:24,076 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 79 [2024-09-15 20:25:24,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:24,076 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2024-09-15 20:25:24,076 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 14 states have call successors, (17), 2 states have call predecessors, (17), 11 states have return successors, (18), 16 states have call predecessors, (18), 13 states have call successors, (18) [2024-09-15 20:25:24,076 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2024-09-15 20:25:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-15 20:25:24,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:24,080 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:24,097 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 20:25:24,283 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 20:25:24,284 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:24,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1800834689, now seen corresponding path program 2 times [2024-09-15 20:25:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:24,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39034932] [2024-09-15 20:25:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:24,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:24,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:24,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 20:25:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:25:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:25:25,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-15 20:25:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:25:25,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:25:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 311 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2024-09-15 20:25:25,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:25,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39034932] [2024-09-15 20:25:25,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39034932] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:25,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925863367] [2024-09-15 20:25:25,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:25:25,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:25,750 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 20:25:25,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 20:25:25,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-15 20:25:25,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:25:25,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 20:25:25,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 1224 trivial. 0 not checked. [2024-09-15 20:25:26,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 20:25:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925863367] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:25:26,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 20:25:26,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [24] total 27 [2024-09-15 20:25:26,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268303791] [2024-09-15 20:25:26,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:25:26,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:25:26,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:26,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:25:26,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2024-09-15 20:25:26,240 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 20:25:26,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:26,275 INFO L93 Difference]: Finished difference Result 136 states and 177 transitions. [2024-09-15 20:25:26,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:25:26,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 156 [2024-09-15 20:25:26,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:26,275 INFO L225 Difference]: With dead ends: 136 [2024-09-15 20:25:26,275 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 20:25:26,276 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2024-09-15 20:25:26,277 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:26,277 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:25:26,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 20:25:26,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 20:25:26,277 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) [2024-09-15 20:25:26,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 20:25:26,277 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 156 [2024-09-15 20:25:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:26,278 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 20:25:26,278 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 20:25:26,278 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 20:25:26,278 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 20:25:26,281 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-15 20:25:26,281 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ackermannErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-15 20:25:26,293 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-15 20:25:26,485 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-15 20:25:26,489 INFO L408 BasicCegarLoop]: Path program histogram: [9, 2, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:26,491 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 20:25:26,493 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 08:25:26 BoogieIcfgContainer [2024-09-15 20:25:26,493 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 20:25:26,494 INFO L158 Benchmark]: Toolchain (without parser) took 54552.62ms. Allocated memory was 81.8MB in the beginning and 740.3MB in the end (delta: 658.5MB). Free memory was 56.3MB in the beginning and 621.1MB in the end (delta: -564.8MB). Peak memory consumption was 94.5MB. Max. memory is 16.1GB. [2024-09-15 20:25:26,495 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 41.2MB in the beginning and 41.1MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:26,495 INFO L158 Benchmark]: Witness Parser took 0.11ms. Allocated memory is still 81.8MB. Free memory is still 58.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:26,495 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.74ms. Allocated memory is still 81.8MB. Free memory was 56.0MB in the beginning and 42.8MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-15 20:25:26,495 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.15ms. Allocated memory is still 81.8MB. Free memory was 42.8MB in the beginning and 41.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 20:25:26,496 INFO L158 Benchmark]: Boogie Preprocessor took 31.67ms. Allocated memory is still 81.8MB. Free memory was 41.3MB in the beginning and 39.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:26,496 INFO L158 Benchmark]: RCFGBuilder took 385.34ms. Allocated memory is still 81.8MB. Free memory was 39.8MB in the beginning and 46.7MB in the end (delta: -6.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-09-15 20:25:26,496 INFO L158 Benchmark]: TraceAbstraction took 53869.31ms. Allocated memory was 81.8MB in the beginning and 740.3MB in the end (delta: 658.5MB). Free memory was 46.1MB in the beginning and 621.1MB in the end (delta: -575.0MB). Peak memory consumption was 86.1MB. Max. memory is 16.1GB. [2024-09-15 20:25:26,497 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 58.7MB. Free memory was 41.2MB in the beginning and 41.1MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.11ms. Allocated memory is still 81.8MB. Free memory is still 58.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.74ms. Allocated memory is still 81.8MB. Free memory was 56.0MB in the beginning and 42.8MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.15ms. Allocated memory is still 81.8MB. Free memory was 42.8MB in the beginning and 41.3MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 31.67ms. Allocated memory is still 81.8MB. Free memory was 41.3MB in the beginning and 39.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 385.34ms. Allocated memory is still 81.8MB. Free memory was 39.8MB in the beginning and 46.7MB in the end (delta: -6.8MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 53869.31ms. Allocated memory was 81.8MB in the beginning and 740.3MB in the end (delta: 658.5MB). Free memory was 46.1MB in the beginning and 621.1MB in the end (delta: -575.0MB). Peak memory consumption was 86.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 16]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 53.8s, OverallIterations: 17, TraceHistogramMax: 23, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 16.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1086 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1018 mSDsluCounter, 1563 SdHoareTripleChecker+Invalid, 4.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1247 mSDsCounter, 1278 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10455 IncrementalHoareTripleChecker+Invalid, 11733 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1278 mSolverCounterUnsat, 316 mSDtfsCounter, 10455 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2435 GetRequests, 1713 SyntacticMatches, 55 SemanticMatches, 667 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12453 ImplicationChecksByTransitivity, 16.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=271occurred in iteration=14, InterpolantAutomatonStates: 409, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 446 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 32.8s InterpolantComputationTime, 1820 NumberOfCodeBlocks, 1612 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 2512 ConstructedInterpolants, 0 QuantifiedInterpolants, 11683 SizeOfPredicates, 46 NumberOfNonLiveVariables, 2511 ConjunctsInSsa, 360 ConjunctsInUnsatCore, 42 InterpolantComputations, 5 PerfectInterpolantSequences, 7297/10323 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! [2024-09-15 20:25:26,526 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE