./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann04.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann04.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/Ackermann04.c ../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann04.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 20:24:30,850 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 20:24:30,943 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 20:24:30,950 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 20:24:30,950 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 20:24:30,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 20:24:30,980 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 20:24:30,980 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 20:24:30,981 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 20:24:30,984 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 20:24:30,985 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 20:24:30,985 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 20:24:30,986 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 20:24:30,986 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 20:24:30,987 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 20:24:30,987 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 20:24:30,987 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 20:24:30,987 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 20:24:30,988 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 20:24:30,988 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 20:24:30,988 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 20:24:30,990 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 20:24:30,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 20:24:30,990 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 20:24:30,991 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 20:24:30,991 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 20:24:30,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 20:24:30,992 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 20:24:30,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 20:24:30,993 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 20:24:30,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 20:24:30,994 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 20:24:30,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 20:24:30,994 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 20:24:30,995 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 20:24:30,995 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 20:24:30,995 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 20:24:30,996 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 20:24:30,996 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 20:24:30,996 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 20:24:30,997 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 20:24:30,997 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 20:24:30,997 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-15 20:24:31,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 20:24:31,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 20:24:31,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 20:24:31,381 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 20:24:31,381 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 20:24:31,382 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive/Ackermann04.c [2024-09-15 20:24:33,048 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 20:24:33,247 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 20:24:33,248 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive/Ackermann04.c [2024-09-15 20:24:33,259 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f710d2a89/2aeec4e081424ac4a52ac9b0885e1779/FLAG70c179d99 [2024-09-15 20:24:33,632 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f710d2a89/2aeec4e081424ac4a52ac9b0885e1779 [2024-09-15 20:24:33,635 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-15 20:24:33,636 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-15 20:24:33,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/Ackermann04.yml/witness-2.1.yml [2024-09-15 20:24:33,683 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 20:24:33,685 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-15 20:24:33,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 20:24:33,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 20:24:33,693 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 20:24:33,694 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 08:24:33" (1/2) ... [2024-09-15 20:24:33,695 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dbd88a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:33, skipping insertion in model container [2024-09-15 20:24:33,695 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 08:24:33" (1/2) ... [2024-09-15 20:24:33,697 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4e1f094c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 08:24:33, skipping insertion in model container [2024-09-15 20:24:33,697 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 08:24:33" (2/2) ... [2024-09-15 20:24:33,697 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dbd88a0 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:33, skipping insertion in model container [2024-09-15 20:24:33,697 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 08:24:33" (2/2) ... [2024-09-15 20:24:33,706 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-15 20:24:33,706 INFO L1541 ArrayList]: Function contract at [L16]: requires null, ensures (((\old(n) < \result) || (\old(m) != 0)) && ((0 < \old(m)) || (\old(m) == 0))) [2024-09-15 20:24:33,727 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 20:24:33,920 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/Ackermann04.c[1166,1179] [2024-09-15 20:24:33,925 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 20:24:33,941 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global [2024-09-15 20:24:33,985 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/Ackermann04.c[1166,1179] [2024-09-15 20:24:33,987 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 20:24:34,008 INFO L204 MainTranslator]: Completed translation [2024-09-15 20:24:34,009 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 15.09 08:24:34 WrapperNode [2024-09-15 20:24:34,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 20:24:34,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 20:24:34,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 20:24:34,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 20:24:34,017 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,023 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,037 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2024-09-15 20:24:34,038 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 20:24:34,039 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 20:24:34,039 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 20:24:34,040 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 20:24:34,049 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,050 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,051 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,066 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 20:24:34,066 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,066 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,073 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,076 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,077 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,079 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,080 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 20:24:34,081 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 20:24:34,083 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 20:24:34,083 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 20:24:34,084 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 08:24:34" (1/1) ... [2024-09-15 20:24:34,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 20:24:34,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:34,113 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 20:24:34,119 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 20:24:34,159 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 20:24:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 20:24:34,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 20:24:34,161 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2024-09-15 20:24:34,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2024-09-15 20:24:34,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-15 20:24:34,226 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 20:24:34,228 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 20:24:34,393 INFO L? ?]: Removed 18 outVars from TransFormulas that were not future-live. [2024-09-15 20:24:34,394 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 20:24:34,418 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 20:24:34,418 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-15 20:24:34,421 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 08:24:34 BoogieIcfgContainer [2024-09-15 20:24:34,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 20:24:34,424 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 20:24:34,424 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 20:24:34,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 20:24:34,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 08:24:33" (1/4) ... [2024-09-15 20:24:34,430 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a6c01b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 08:24:34, skipping insertion in model container [2024-09-15 20:24:34,431 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 08:24:33" (2/4) ... [2024-09-15 20:24:34,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a6c01b and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 15.09 08:24:34, skipping insertion in model container [2024-09-15 20:24:34,431 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 08:24:34" (3/4) ... [2024-09-15 20:24:34,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a6c01b and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 15.09 08:24:34, skipping insertion in model container [2024-09-15 20:24:34,432 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 08:24:34" (4/4) ... [2024-09-15 20:24:34,433 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2024-09-15 20:24:34,450 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 20:24:34,451 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-09-15 20:24:34,509 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 20:24:34,515 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;@43735741, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 20:24:34,515 INFO L337 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2024-09-15 20:24:34,518 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 20:24:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-09-15 20:24:34,525 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:34,526 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:34,527 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:34,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:34,533 INFO L85 PathProgramCache]: Analyzing trace with hash -26348941, now seen corresponding path program 1 times [2024-09-15 20:24:34,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:34,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75527977] [2024-09-15 20:24:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:34,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:34,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:34,928 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 20:24:34,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:34,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75527977] [2024-09-15 20:24:34,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75527977] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:34,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:34,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 20:24:34,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538308074] [2024-09-15 20:24:34,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:34,936 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 20:24:34,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 20:24:34,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 20:24:34,964 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 20:24:35,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:35,136 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-15 20:24:35,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 20:24:35,142 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 20:24:35,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:35,149 INFO L225 Difference]: With dead ends: 39 [2024-09-15 20:24:35,149 INFO L226 Difference]: Without dead ends: 36 [2024-09-15 20:24:35,151 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 20:24:35,155 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 12 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:35,157 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:24:35,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-15 20:24:35,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2024-09-15 20:24:35,197 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 20:24:35,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2024-09-15 20:24:35,200 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 7 [2024-09-15 20:24:35,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:35,200 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2024-09-15 20:24:35,200 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 20:24:35,201 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2024-09-15 20:24:35,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 20:24:35,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:35,202 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:35,203 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 20:24:35,203 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:35,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:35,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1506041859, now seen corresponding path program 1 times [2024-09-15 20:24:35,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:35,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611623293] [2024-09-15 20:24:35,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:35,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:35,378 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 20:24:35,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:35,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611623293] [2024-09-15 20:24:35,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611623293] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:35,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:35,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 20:24:35,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012644418] [2024-09-15 20:24:35,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:35,380 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:24:35,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:35,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:24:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:24:35,386 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 20:24:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:35,462 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2024-09-15 20:24:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:24:35,463 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 20:24:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:35,464 INFO L225 Difference]: With dead ends: 42 [2024-09-15 20:24:35,464 INFO L226 Difference]: Without dead ends: 42 [2024-09-15 20:24:35,465 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 20:24:35,466 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:35,466 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 20:24:35,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-15 20:24:35,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2024-09-15 20:24:35,473 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 20:24:35,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2024-09-15 20:24:35,475 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 11 [2024-09-15 20:24:35,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:35,475 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2024-09-15 20:24:35,475 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 20:24:35,476 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2024-09-15 20:24:35,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 20:24:35,476 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:35,476 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:35,476 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 20:24:35,477 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:35,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:35,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1508872004, now seen corresponding path program 1 times [2024-09-15 20:24:35,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:35,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004687280] [2024-09-15 20:24:35,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:35,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:24:35,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:35,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004687280] [2024-09-15 20:24:35,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004687280] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:35,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:35,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 20:24:35,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028321812] [2024-09-15 20:24:35,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:35,607 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 20:24:35,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:35,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 20:24:35,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 20:24:35,610 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:35,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:35,689 INFO L93 Difference]: Finished difference Result 47 states and 69 transitions. [2024-09-15 20:24:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 20:24:35,690 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-09-15 20:24:35,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:35,691 INFO L225 Difference]: With dead ends: 47 [2024-09-15 20:24:35,693 INFO L226 Difference]: Without dead ends: 47 [2024-09-15 20:24:35,693 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 20:24:35,695 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:35,696 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:24:35,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-15 20:24:35,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2024-09-15 20:24:35,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 31 states have internal predecessors, (38), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-15 20:24:35,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2024-09-15 20:24:35,711 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 11 [2024-09-15 20:24:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:35,711 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2024-09-15 20:24:35,711 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 20:24:35,711 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2024-09-15 20:24:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-15 20:24:35,712 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:35,712 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:35,712 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 20:24:35,713 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:35,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:35,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1484759222, now seen corresponding path program 1 times [2024-09-15 20:24:35,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:35,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763972891] [2024-09-15 20:24:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:35,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:35,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:35,823 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 20:24:35,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:35,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763972891] [2024-09-15 20:24:35,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763972891] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:35,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 20:24:35,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 20:24:35,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561581227] [2024-09-15 20:24:35,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:35,825 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:24:35,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:35,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:24:35,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 20:24:35,829 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 20:24:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:35,886 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2024-09-15 20:24:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 20:24:35,887 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 20:24:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:35,888 INFO L225 Difference]: With dead ends: 61 [2024-09-15 20:24:35,889 INFO L226 Difference]: Without dead ends: 57 [2024-09-15 20:24:35,889 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 20:24:35,890 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:35,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 42 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:24:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-15 20:24:35,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 51. [2024-09-15 20:24:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 10 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-15 20:24:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 80 transitions. [2024-09-15 20:24:35,901 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 80 transitions. Word has length 11 [2024-09-15 20:24:35,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:35,901 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 80 transitions. [2024-09-15 20:24:35,902 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 20:24:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 80 transitions. [2024-09-15 20:24:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 20:24:35,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:35,903 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:35,903 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-15 20:24:35,903 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ackermannErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:35,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1264662995, now seen corresponding path program 1 times [2024-09-15 20:24:35,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:35,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264574001] [2024-09-15 20:24:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:35,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:35,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-15 20:24:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 20:24:36,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:36,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264574001] [2024-09-15 20:24:36,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264574001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:36,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265366392] [2024-09-15 20:24:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:36,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:36,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:36,025 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 20:24:36,027 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 20:24:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-15 20:24:36,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 20:24:36,145 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 20:24:36,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265366392] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 20:24:36,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 20:24:36,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2024-09-15 20:24:36,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960687971] [2024-09-15 20:24:36,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 20:24:36,146 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 20:24:36,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 20:24:36,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-15 20:24:36,147 INFO L87 Difference]: Start difference. First operand 51 states and 80 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 20:24:36,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:36,207 INFO L93 Difference]: Finished difference Result 58 states and 101 transitions. [2024-09-15 20:24:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 20:24:36,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-15 20:24:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:36,212 INFO L225 Difference]: With dead ends: 58 [2024-09-15 20:24:36,212 INFO L226 Difference]: Without dead ends: 52 [2024-09-15 20:24:36,212 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-09-15 20:24:36,213 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:36,213 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 20:24:36,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-15 20:24:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2024-09-15 20:24:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2024-09-15 20:24:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 65 transitions. [2024-09-15 20:24:36,223 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 65 transitions. Word has length 14 [2024-09-15 20:24:36,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:36,223 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 65 transitions. [2024-09-15 20:24:36,223 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 20:24:36,223 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 65 transitions. [2024-09-15 20:24:36,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 20:24:36,224 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:36,224 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:36,237 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 20:24:36,425 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 20:24:36,425 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:36,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash -507496426, now seen corresponding path program 1 times [2024-09-15 20:24:36,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:36,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997500194] [2024-09-15 20:24:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:36,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:36,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,524 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 20:24:36,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:36,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997500194] [2024-09-15 20:24:36,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997500194] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:36,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699625991] [2024-09-15 20:24:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:36,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:36,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:36,527 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 20:24:36,529 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 20:24:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:36,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-15 20:24:36,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:36,602 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 20:24:36,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:36,694 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 20:24:36,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699625991] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:36,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:36,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-09-15 20:24:36,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200021085] [2024-09-15 20:24:36,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:36,698 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 20:24:36,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:36,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 20:24:36,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-15 20:24:36,699 INFO L87 Difference]: Start difference. First operand 44 states and 65 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-15 20:24:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:36,867 INFO L93 Difference]: Finished difference Result 62 states and 102 transitions. [2024-09-15 20:24:36,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 20:24:36,867 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 20:24:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:36,869 INFO L225 Difference]: With dead ends: 62 [2024-09-15 20:24:36,869 INFO L226 Difference]: Without dead ends: 53 [2024-09-15 20:24:36,869 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 20:24:36,870 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:36,870 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 56 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:24:36,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-15 20:24:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2024-09-15 20:24:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 9 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (21), 10 states have call predecessors, (21), 9 states have call successors, (21) [2024-09-15 20:24:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2024-09-15 20:24:36,887 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 18 [2024-09-15 20:24:36,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:36,888 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2024-09-15 20:24:36,888 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 20:24:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2024-09-15 20:24:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 20:24:36,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:36,891 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 20:24:36,908 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 20:24:37,091 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 20:24:37,092 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:37,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:37,093 INFO L85 PathProgramCache]: Analyzing trace with hash -506552652, now seen corresponding path program 1 times [2024-09-15 20:24:37,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:37,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881838871] [2024-09-15 20:24:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:37,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:37,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,375 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 20:24:37,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881838871] [2024-09-15 20:24:37,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881838871] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131184599] [2024-09-15 20:24:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:37,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:37,380 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 20:24:37,387 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 20:24:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:37,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 20:24:37,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:37,519 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 20:24:37,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:38,077 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 20:24:38,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131184599] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:38,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:38,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2024-09-15 20:24:38,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295360262] [2024-09-15 20:24:38,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:38,078 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-15 20:24:38,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-15 20:24:38,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-09-15 20:24:38,079 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-15 20:24:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:38,177 INFO L93 Difference]: Finished difference Result 76 states and 108 transitions. [2024-09-15 20:24:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 20:24:38,178 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 20:24:38,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:38,179 INFO L225 Difference]: With dead ends: 76 [2024-09-15 20:24:38,179 INFO L226 Difference]: Without dead ends: 58 [2024-09-15 20:24:38,180 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 93 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2024-09-15 20:24:38,180 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:38,180 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 59 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 20:24:38,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-15 20:24:38,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2024-09-15 20:24:38,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 10 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (23), 12 states have call predecessors, (23), 10 states have call successors, (23) [2024-09-15 20:24:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-09-15 20:24:38,188 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 44 [2024-09-15 20:24:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:38,189 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-09-15 20:24:38,189 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 20:24:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-09-15 20:24:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-15 20:24:38,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:38,195 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:38,213 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 20:24:38,396 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 20:24:38,396 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:38,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:38,397 INFO L85 PathProgramCache]: Analyzing trace with hash 320389373, now seen corresponding path program 2 times [2024-09-15 20:24:38,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:38,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969730411] [2024-09-15 20:24:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:38,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:38,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:38,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:38,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,041 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 20:24:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:39,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 20:24:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 114 proven. 279 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-15 20:24:39,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:39,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969730411] [2024-09-15 20:24:39,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969730411] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:39,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820571403] [2024-09-15 20:24:39,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 20:24:39,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:39,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:39,284 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 20:24:39,285 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 20:24:39,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 20:24:39,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:39,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-15 20:24:39,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-15 20:24:39,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:41,291 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2024-09-15 20:24:41,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820571403] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:41,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:41,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 32 [2024-09-15 20:24:41,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437548920] [2024-09-15 20:24:41,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:41,293 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 20:24:41,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:41,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 20:24:41,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2024-09-15 20:24:41,295 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2024-09-15 20:24:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:42,072 INFO L93 Difference]: Finished difference Result 94 states and 135 transitions. [2024-09-15 20:24:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 20:24:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) Word has length 118 [2024-09-15 20:24:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:42,075 INFO L225 Difference]: With dead ends: 94 [2024-09-15 20:24:42,075 INFO L226 Difference]: Without dead ends: 94 [2024-09-15 20:24:42,077 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=539, Invalid=2767, Unknown=0, NotChecked=0, Total=3306 [2024-09-15 20:24:42,077 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:42,078 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 102 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:24:42,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-15 20:24:42,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2024-09-15 20:24:42,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 55 states have internal predecessors, (59), 16 states have call successors, (16), 7 states have call predecessors, (16), 11 states have return successors, (41), 18 states have call predecessors, (41), 16 states have call successors, (41) [2024-09-15 20:24:42,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 116 transitions. [2024-09-15 20:24:42,087 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 116 transitions. Word has length 118 [2024-09-15 20:24:42,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:42,087 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 116 transitions. [2024-09-15 20:24:42,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2024-09-15 20:24:42,088 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 116 transitions. [2024-09-15 20:24:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-15 20:24:42,091 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:42,091 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 9, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:42,114 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-15 20:24:42,292 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 20:24:42,292 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:42,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:42,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1065367807, now seen corresponding path program 3 times [2024-09-15 20:24:42,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:42,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410111052] [2024-09-15 20:24:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:42,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:42,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:42,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 20:24:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:43,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-15 20:24:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:43,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:43,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:43,126 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 148 proven. 171 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2024-09-15 20:24:43,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:43,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410111052] [2024-09-15 20:24:43,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410111052] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:43,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831147203] [2024-09-15 20:24:43,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 20:24:43,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:43,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:43,129 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 20:24:43,131 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 20:24:43,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-15 20:24:43,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:43,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 20:24:43,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:43,317 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 190 proven. 71 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-15 20:24:43,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:44,548 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 208 proven. 61 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2024-09-15 20:24:44,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831147203] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:44,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:44,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12, 15] total 28 [2024-09-15 20:24:44,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182062253] [2024-09-15 20:24:44,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:44,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 20:24:44,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 20:24:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-09-15 20:24:44,551 INFO L87 Difference]: Start difference. First operand 81 states and 116 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 23 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (24), 14 states have call predecessors, (24), 11 states have call successors, (24) [2024-09-15 20:24:45,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:45,056 INFO L93 Difference]: Finished difference Result 102 states and 146 transitions. [2024-09-15 20:24:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-15 20:24:45,058 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 23 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (24), 14 states have call predecessors, (24), 11 states have call successors, (24) Word has length 104 [2024-09-15 20:24:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:45,060 INFO L225 Difference]: With dead ends: 102 [2024-09-15 20:24:45,060 INFO L226 Difference]: Without dead ends: 99 [2024-09-15 20:24:45,061 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 226 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2024-09-15 20:24:45,064 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:45,064 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 104 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:24:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-15 20:24:45,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-15 20:24:45,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 66 states have internal predecessors, (71), 19 states have call successors, (19), 8 states have call predecessors, (19), 14 states have return successors, (49), 24 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-15 20:24:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 139 transitions. [2024-09-15 20:24:45,079 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 139 transitions. Word has length 104 [2024-09-15 20:24:45,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:45,080 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 139 transitions. [2024-09-15 20:24:45,080 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 23 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (24), 14 states have call predecessors, (24), 11 states have call successors, (24) [2024-09-15 20:24:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 139 transitions. [2024-09-15 20:24:45,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-09-15 20:24:45,082 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:45,082 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:45,099 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 20:24:45,286 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 20:24:45,287 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:45,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:45,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1993615657, now seen corresponding path program 4 times [2024-09-15 20:24:45,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:45,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670265590] [2024-09-15 20:24:45,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:45,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:45,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:45,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:45,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:45,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:45,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:45,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:45,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:45,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:45,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:45,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 20:24:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:45,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:46,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-15 20:24:46,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:46,111 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 139 proven. 307 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2024-09-15 20:24:46,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:46,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670265590] [2024-09-15 20:24:46,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670265590] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:46,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16315982] [2024-09-15 20:24:46,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 20:24:46,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:46,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:46,120 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 20:24:46,122 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 20:24:46,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 20:24:46,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:46,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-15 20:24:46,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-15 20:24:46,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:47,866 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 155 proven. 295 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-15 20:24:47,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16315982] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:47,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:47,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2024-09-15 20:24:47,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19365124] [2024-09-15 20:24:47,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:47,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 20:24:47,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:47,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 20:24:47,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-09-15 20:24:47,872 INFO L87 Difference]: Start difference. First operand 99 states and 139 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 21 states have internal predecessors, (69), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2024-09-15 20:24:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:48,331 INFO L93 Difference]: Finished difference Result 121 states and 175 transitions. [2024-09-15 20:24:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 20:24:48,332 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 21 states have internal predecessors, (69), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) Word has length 130 [2024-09-15 20:24:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:48,333 INFO L225 Difference]: With dead ends: 121 [2024-09-15 20:24:48,333 INFO L226 Difference]: Without dead ends: 121 [2024-09-15 20:24:48,334 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 282 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=1575, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 20:24:48,335 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:48,335 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 102 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 20:24:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-15 20:24:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 114. [2024-09-15 20:24:48,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 75 states have internal predecessors, (80), 22 states have call successors, (22), 8 states have call predecessors, (22), 17 states have return successors, (62), 30 states have call predecessors, (62), 22 states have call successors, (62) [2024-09-15 20:24:48,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 164 transitions. [2024-09-15 20:24:48,359 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 164 transitions. Word has length 130 [2024-09-15 20:24:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:48,359 INFO L474 AbstractCegarLoop]: Abstraction has 114 states and 164 transitions. [2024-09-15 20:24:48,359 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 21 states have internal predecessors, (69), 12 states have call successors, (18), 2 states have call predecessors, (18), 11 states have return successors, (27), 11 states have call predecessors, (27), 12 states have call successors, (27) [2024-09-15 20:24:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 164 transitions. [2024-09-15 20:24:48,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-15 20:24:48,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:48,361 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 20:24:48,381 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 20:24:48,561 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 20:24:48,562 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:48,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:48,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1800834689, now seen corresponding path program 5 times [2024-09-15 20:24:48,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:48,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874216105] [2024-09-15 20:24:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:48,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:48,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 20:24:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:49,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:24:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-15 20:24:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:49,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:49,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:24:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 308 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2024-09-15 20:24:49,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:49,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874216105] [2024-09-15 20:24:49,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874216105] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:49,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527846762] [2024-09-15 20:24:49,929 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 20:24:49,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:49,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:49,931 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 20:24:49,934 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 20:24:50,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-15 20:24:50,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:50,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 20:24:50,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2024-09-15 20:24:50,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:24:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2024-09-15 20:24:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527846762] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:24:54,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:24:54,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2024-09-15 20:24:54,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450502248] [2024-09-15 20:24:54,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:24:54,293 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-15 20:24:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:24:54,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-15 20:24:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1230, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 20:24:54,295 INFO L87 Difference]: Start difference. First operand 114 states and 164 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-15 20:24:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:24:55,070 INFO L93 Difference]: Finished difference Result 143 states and 219 transitions. [2024-09-15 20:24:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 20:24:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) Word has length 156 [2024-09-15 20:24:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:24:55,073 INFO L225 Difference]: With dead ends: 143 [2024-09-15 20:24:55,073 INFO L226 Difference]: Without dead ends: 143 [2024-09-15 20:24:55,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 335 SyntacticMatches, 14 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=752, Invalid=3408, Unknown=0, NotChecked=0, Total=4160 [2024-09-15 20:24:55,076 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:24:55,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 120 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:24:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-15 20:24:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 129. [2024-09-15 20:24:55,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 83 states have (on average 1.072289156626506) internal successors, (89), 84 states have internal predecessors, (89), 25 states have call successors, (25), 8 states have call predecessors, (25), 20 states have return successors, (83), 36 states have call predecessors, (83), 25 states have call successors, (83) [2024-09-15 20:24:55,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 197 transitions. [2024-09-15 20:24:55,096 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 197 transitions. Word has length 156 [2024-09-15 20:24:55,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:24:55,097 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 197 transitions. [2024-09-15 20:24:55,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 32 states have internal predecessors, (82), 16 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (35), 18 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-15 20:24:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 197 transitions. [2024-09-15 20:24:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2024-09-15 20:24:55,101 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:24:55,102 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:24:55,119 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 20:24:55,302 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 20:24:55,303 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:24:55,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:24:55,303 INFO L85 PathProgramCache]: Analyzing trace with hash -707320168, now seen corresponding path program 6 times [2024-09-15 20:24:55,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:24:55,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035877886] [2024-09-15 20:24:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:24:55,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:24:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:55,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 20:24:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:24:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-15 20:24:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:24:56,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:24:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:24:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:24:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 20:24:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:24:56,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 400 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2024-09-15 20:24:56,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:24:56,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035877886] [2024-09-15 20:24:56,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035877886] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:24:56,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283159182] [2024-09-15 20:24:56,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 20:24:56,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:24:56,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:24:56,810 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 20:24:56,811 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 20:24:57,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2024-09-15 20:24:57,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 20:24:57,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-15 20:24:57,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:24:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2024-09-15 20:24:57,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2024-09-15 20:25:00,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283159182] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:00,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:00,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 28] total 35 [2024-09-15 20:25:00,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872083265] [2024-09-15 20:25:00,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:00,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-15 20:25:00,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:00,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-15 20:25:00,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2024-09-15 20:25:00,970 INFO L87 Difference]: Start difference. First operand 129 states and 197 transitions. Second operand has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2024-09-15 20:25:01,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:01,720 INFO L93 Difference]: Finished difference Result 165 states and 263 transitions. [2024-09-15 20:25:01,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-15 20:25:01,723 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) Word has length 169 [2024-09-15 20:25:01,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:01,725 INFO L225 Difference]: With dead ends: 165 [2024-09-15 20:25:01,726 INFO L226 Difference]: Without dead ends: 165 [2024-09-15 20:25:01,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 364 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=3340, Unknown=0, NotChecked=0, Total=4160 [2024-09-15 20:25:01,728 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 119 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:01,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 124 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 20:25:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-15 20:25:01,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 144. [2024-09-15 20:25:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 92 states have (on average 1.065217391304348) internal successors, (98), 93 states have internal predecessors, (98), 28 states have call successors, (28), 8 states have call predecessors, (28), 23 states have return successors, (104), 42 states have call predecessors, (104), 28 states have call successors, (104) [2024-09-15 20:25:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 230 transitions. [2024-09-15 20:25:01,752 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 230 transitions. Word has length 169 [2024-09-15 20:25:01,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:01,753 INFO L474 AbstractCegarLoop]: Abstraction has 144 states and 230 transitions. [2024-09-15 20:25:01,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.3714285714285714) internal successors, (83), 31 states have internal predecessors, (83), 17 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (36), 16 states have call predecessors, (36), 17 states have call successors, (36) [2024-09-15 20:25:01,753 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 230 transitions. [2024-09-15 20:25:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-15 20:25:01,756 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 20:25:01,756 INFO L216 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:01,775 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 20:25:01,957 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 20:25:01,957 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ackermannErr0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-15 20:25:01,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 20:25:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1950095843, now seen corresponding path program 7 times [2024-09-15 20:25:01,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 20:25:01,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051184219] [2024-09-15 20:25:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 20:25:01,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 20:25:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 20:25:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:25:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:25:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-15 20:25:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:02,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:02,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 20:25:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 20:25:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 20:25:03,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 20:25:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 20:25:03,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-15 20:25:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2024-09-15 20:25:03,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 20:25:03,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051184219] [2024-09-15 20:25:03,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051184219] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 20:25:03,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487592946] [2024-09-15 20:25:03,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 20:25:03,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 20:25:03,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 20:25:03,451 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 20:25:03,453 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 20:25:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 20:25:03,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-15 20:25:03,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 20:25:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2024-09-15 20:25:03,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 20:25:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2024-09-15 20:25:10,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487592946] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 20:25:10,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 20:25:10,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 33] total 37 [2024-09-15 20:25:10,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474424609] [2024-09-15 20:25:10,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 20:25:10,082 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-15 20:25:10,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 20:25:10,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-15 20:25:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 20:25:10,084 INFO L87 Difference]: Start difference. First operand 144 states and 230 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 30 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-15 20:25:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 20:25:11,324 INFO L93 Difference]: Finished difference Result 160 states and 252 transitions. [2024-09-15 20:25:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-15 20:25:11,325 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 30 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 182 [2024-09-15 20:25:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 20:25:11,326 INFO L225 Difference]: With dead ends: 160 [2024-09-15 20:25:11,326 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 20:25:11,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 396 SyntacticMatches, 20 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=766, Invalid=3790, Unknown=0, NotChecked=0, Total=4556 [2024-09-15 20:25:11,328 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 938 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 20:25:11,328 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 72 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 938 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 20:25:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 20:25:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 20:25:11,329 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 20:25:11,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 20:25:11,329 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 182 [2024-09-15 20:25:11,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 20:25:11,329 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 20:25:11,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 30 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-15 20:25:11,329 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 20:25:11,329 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 20:25:11,331 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2024-09-15 20:25:11,332 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ackermannErr0ENSURES_VIOLATIONPOST_CONDITION (0 of 2 remaining) [2024-09-15 20:25:11,346 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 20:25:11,532 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 20:25:11,536 INFO L408 BasicCegarLoop]: Path program histogram: [7, 1, 1, 1, 1, 1, 1] [2024-09-15 20:25:11,538 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 20:25:11,541 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 08:25:11 BoogieIcfgContainer [2024-09-15 20:25:11,541 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 20:25:11,542 INFO L158 Benchmark]: Toolchain (without parser) took 37857.04ms. Allocated memory was 73.4MB in the beginning and 488.6MB in the end (delta: 415.2MB). Free memory was 39.9MB in the beginning and 331.4MB in the end (delta: -291.4MB). Peak memory consumption was 125.1MB. Max. memory is 16.1GB. [2024-09-15 20:25:11,542 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 52.4MB. Free memory is still 35.9MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:11,542 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 41.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 20:25:11,542 INFO L158 Benchmark]: CACSL2BoogieTranslator took 321.88ms. Allocated memory is still 73.4MB. Free memory was 39.7MB in the beginning and 47.1MB in the end (delta: -7.4MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2024-09-15 20:25:11,543 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.54ms. Allocated memory is still 73.4MB. Free memory was 47.1MB in the beginning and 45.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 20:25:11,543 INFO L158 Benchmark]: Boogie Preprocessor took 41.15ms. Allocated memory is still 73.4MB. Free memory was 45.6MB in the beginning and 43.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 20:25:11,543 INFO L158 Benchmark]: RCFGBuilder took 340.85ms. Allocated memory is still 73.4MB. Free memory was 43.9MB in the beginning and 32.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-15 20:25:11,544 INFO L158 Benchmark]: TraceAbstraction took 37117.07ms. Allocated memory was 73.4MB in the beginning and 488.6MB in the end (delta: 415.2MB). Free memory was 31.3MB in the beginning and 331.4MB in the end (delta: -300.1MB). Peak memory consumption was 113.8MB. Max. memory is 16.1GB. [2024-09-15 20:25:11,545 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 52.4MB. Free memory is still 35.9MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 41.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 321.88ms. Allocated memory is still 73.4MB. Free memory was 39.7MB in the beginning and 47.1MB in the end (delta: -7.4MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.54ms. Allocated memory is still 73.4MB. Free memory was 47.1MB in the beginning and 45.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.15ms. Allocated memory is still 73.4MB. Free memory was 45.6MB in the beginning and 43.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 340.85ms. Allocated memory is still 73.4MB. Free memory was 43.9MB in the beginning and 32.3MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 37117.07ms. Allocated memory was 73.4MB in the beginning and 488.6MB in the end (delta: 415.2MB). Free memory was 31.3MB in the beginning and 331.4MB in the end (delta: -300.1MB). Peak memory consumption was 113.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 16]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 37.1s, OverallIterations: 13, TraceHistogramMax: 27, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 478 SdHoareTripleChecker+Valid, 2.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 449 mSDsluCounter, 946 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 738 mSDsCounter, 547 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4287 IncrementalHoareTripleChecker+Invalid, 4834 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 547 mSolverCounterUnsat, 208 mSDtfsCounter, 4287 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2454 GetRequests, 2002 SyntacticMatches, 75 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4103 ImplicationChecksByTransitivity, 5.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=144occurred in iteration=12, InterpolantAutomatonStates: 221, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 95 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 28.0s InterpolantComputationTime, 1910 NumberOfCodeBlocks, 1857 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 2801 ConstructedInterpolants, 0 QuantifiedInterpolants, 5671 SizeOfPredicates, 28 NumberOfNonLiveVariables, 2870 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 30 InterpolantComputations, 5 PerfectInterpolantSequences, 15744/19669 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-15 20:25:11,580 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE