/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 06:48:07,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 06:48:07,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 06:48:07,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 06:48:08,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 06:48:08,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 06:48:08,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 06:48:08,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 06:48:08,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 06:48:08,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 06:48:08,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 06:48:08,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 06:48:08,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 06:48:08,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 06:48:08,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 06:48:08,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 06:48:08,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 06:48:08,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 06:48:08,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 06:48:08,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 06:48:08,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 06:48:08,059 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 06:48:08,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 06:48:08,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 06:48:08,061 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 06:48:08,062 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 06:48:08,062 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 06:48:08,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 06:48:08,062 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 06:48:08,063 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 06:48:08,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 06:48:08,063 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 06:48:08,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 06:48:08,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 06:48:08,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 06:48:08,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 06:48:08,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 06:48:08,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 06:48:08,064 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 06:48:08,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 06:48:08,064 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 06:48:08,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 06:48:08,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 06:48:08,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 06:48:08,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 06:48:08,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:48:08,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 06:48:08,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 06:48:08,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 06:48:08,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 06:48:08,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 06:48:08,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 06:48:08,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 06:48:08,066 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 06:48:08,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 06:48:08,067 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 06:48:08,067 INFO L138 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 06:48:08,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 06:48:08,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 06:48:08,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 06:48:08,349 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 06:48:08,350 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 06:48:08,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:48:09,588 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 06:48:09,849 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 06:48:09,850 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:48:09,862 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68888ebd8/c4781d2a26be4a99af6664f4f7dff02f/FLAG4a39ded9f [2023-04-02 06:48:09,877 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68888ebd8/c4781d2a26be4a99af6664f4f7dff02f [2023-04-02 06:48:09,880 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 06:48:09,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 06:48:09,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 06:48:09,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 06:48:09,887 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 06:48:09,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:48:09" (1/1) ... [2023-04-02 06:48:09,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc4d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:09, skipping insertion in model container [2023-04-02 06:48:09,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 06:48:09" (1/1) ... [2023-04-02 06:48:09,896 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 06:48:09,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 06:48:10,177 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2023-04-02 06:48:10,218 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:48:10,232 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 06:48:10,267 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7752,7765] [2023-04-02 06:48:10,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 06:48:10,297 INFO L208 MainTranslator]: Completed translation [2023-04-02 06:48:10,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10 WrapperNode [2023-04-02 06:48:10,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 06:48:10,299 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 06:48:10,299 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 06:48:10,299 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 06:48:10,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (1/1) ... [2023-04-02 06:48:10,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (1/1) ... [2023-04-02 06:48:10,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (1/1) ... [2023-04-02 06:48:10,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (1/1) ... [2023-04-02 06:48:10,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (1/1) ... [2023-04-02 06:48:10,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (1/1) ... [2023-04-02 06:48:10,367 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (1/1) ... [2023-04-02 06:48:10,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (1/1) ... [2023-04-02 06:48:10,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 06:48:10,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 06:48:10,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 06:48:10,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 06:48:10,375 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (1/1) ... [2023-04-02 06:48:10,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 06:48:10,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 06:48:10,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 06:48:10,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 06:48:10,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 06:48:10,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 06:48:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 06:48:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 06:48:10,461 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 06:48:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 06:48:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 06:48:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 06:48:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 06:48:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-04-02 06:48:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-02 06:48:10,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 06:48:10,463 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 06:48:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 06:48:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 06:48:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 06:48:10,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 06:48:10,601 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 06:48:10,602 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 06:48:11,167 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 06:48:11,178 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 06:48:11,179 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 06:48:11,181 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:48:11 BoogieIcfgContainer [2023-04-02 06:48:11,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 06:48:11,183 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 06:48:11,183 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 06:48:11,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 06:48:11,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 06:48:09" (1/3) ... [2023-04-02 06:48:11,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c04e839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:48:11, skipping insertion in model container [2023-04-02 06:48:11,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 06:48:10" (2/3) ... [2023-04-02 06:48:11,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c04e839 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 06:48:11, skipping insertion in model container [2023-04-02 06:48:11,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 06:48:11" (3/3) ... [2023-04-02 06:48:11,192 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-04-02 06:48:11,211 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 06:48:11,211 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 06:48:11,278 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 06:48:11,284 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@269accc3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 06:48:11,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 06:48:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand has 160 states, 148 states have (on average 1.7297297297297298) internal successors, (256), 155 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 06:48:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-04-02 06:48:11,304 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:11,306 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:11,306 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:11,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:11,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2128326862, now seen corresponding path program 1 times [2023-04-02 06:48:11,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:11,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757063976] [2023-04-02 06:48:11,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:11,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:12,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:12,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:12,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757063976] [2023-04-02 06:48:12,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757063976] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:12,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:12,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:12,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482939623] [2023-04-02 06:48:12,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:12,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:12,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:12,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:12,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:12,104 INFO L87 Difference]: Start difference. First operand has 160 states, 148 states have (on average 1.7297297297297298) internal successors, (256), 155 states have internal predecessors, (256), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:13,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:13,026 INFO L93 Difference]: Finished difference Result 358 states and 566 transitions. [2023-04-02 06:48:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:13,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 2 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 60 [2023-04-02 06:48:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:13,041 INFO L225 Difference]: With dead ends: 358 [2023-04-02 06:48:13,041 INFO L226 Difference]: Without dead ends: 234 [2023-04-02 06:48:13,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:13,048 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 155 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:13,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 458 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:48:13,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-04-02 06:48:13,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2023-04-02 06:48:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 227 states have (on average 1.5330396475770924) internal successors, (348), 227 states have internal predecessors, (348), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 351 transitions. [2023-04-02 06:48:13,131 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 351 transitions. Word has length 60 [2023-04-02 06:48:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:13,133 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 351 transitions. [2023-04-02 06:48:13,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 351 transitions. [2023-04-02 06:48:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-02 06:48:13,142 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:13,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:13,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 06:48:13,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:13,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash 268780399, now seen corresponding path program 1 times [2023-04-02 06:48:13,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:13,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258309568] [2023-04-02 06:48:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:13,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:13,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:13,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258309568] [2023-04-02 06:48:13,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258309568] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:13,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:13,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:13,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636630357] [2023-04-02 06:48:13,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:13,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:13,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:13,466 INFO L87 Difference]: Start difference. First operand 231 states and 351 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:14,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:14,100 INFO L93 Difference]: Finished difference Result 567 states and 879 transitions. [2023-04-02 06:48:14,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:14,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 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 62 [2023-04-02 06:48:14,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:14,103 INFO L225 Difference]: With dead ends: 567 [2023-04-02 06:48:14,104 INFO L226 Difference]: Without dead ends: 391 [2023-04-02 06:48:14,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:14,106 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 128 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:14,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 412 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:14,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-04-02 06:48:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 387. [2023-04-02 06:48:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 383 states have (on average 1.5430809399477807) internal successors, (591), 383 states have internal predecessors, (591), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 594 transitions. [2023-04-02 06:48:14,154 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 594 transitions. Word has length 62 [2023-04-02 06:48:14,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:14,155 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 594 transitions. [2023-04-02 06:48:14,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:14,155 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 594 transitions. [2023-04-02 06:48:14,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-02 06:48:14,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:14,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:14,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 06:48:14,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:14,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash -349005296, now seen corresponding path program 1 times [2023-04-02 06:48:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:14,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955731931] [2023-04-02 06:48:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:14,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955731931] [2023-04-02 06:48:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955731931] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:14,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:14,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449109193] [2023-04-02 06:48:14,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:14,488 INFO L87 Difference]: Start difference. First operand 387 states and 594 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:15,101 INFO L93 Difference]: Finished difference Result 1019 states and 1580 transitions. [2023-04-02 06:48:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:15,101 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 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 64 [2023-04-02 06:48:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:15,106 INFO L225 Difference]: With dead ends: 1019 [2023-04-02 06:48:15,106 INFO L226 Difference]: Without dead ends: 687 [2023-04-02 06:48:15,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:15,115 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 122 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:15,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 413 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2023-04-02 06:48:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 681. [2023-04-02 06:48:15,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 677 states have (on average 1.5406203840472674) internal successors, (1043), 677 states have internal predecessors, (1043), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:15,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1046 transitions. [2023-04-02 06:48:15,167 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1046 transitions. Word has length 64 [2023-04-02 06:48:15,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:15,168 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 1046 transitions. [2023-04-02 06:48:15,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:15,168 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1046 transitions. [2023-04-02 06:48:15,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-04-02 06:48:15,169 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:15,169 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:15,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-02 06:48:15,169 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:15,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:15,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1174626703, now seen corresponding path program 1 times [2023-04-02 06:48:15,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:15,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388235703] [2023-04-02 06:48:15,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:15,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:15,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388235703] [2023-04-02 06:48:15,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388235703] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:15,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:15,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:48:15,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760337802] [2023-04-02 06:48:15,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:15,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:48:15,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:15,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:48:15,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:15,486 INFO L87 Difference]: Start difference. First operand 681 states and 1046 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:16,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:16,307 INFO L93 Difference]: Finished difference Result 2955 states and 4624 transitions. [2023-04-02 06:48:16,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-02 06:48:16,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (2), 2 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 66 [2023-04-02 06:48:16,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:16,319 INFO L225 Difference]: With dead ends: 2955 [2023-04-02 06:48:16,320 INFO L226 Difference]: Without dead ends: 2319 [2023-04-02 06:48:16,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-04-02 06:48:16,331 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 972 mSDsluCounter, 1318 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:16,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 1537 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:16,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2319 states. [2023-04-02 06:48:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2319 to 1209. [2023-04-02 06:48:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 1205 states have (on average 1.5576763485477179) internal successors, (1877), 1205 states have internal predecessors, (1877), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:16,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 1880 transitions. [2023-04-02 06:48:16,457 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 1880 transitions. Word has length 66 [2023-04-02 06:48:16,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:16,458 INFO L495 AbstractCegarLoop]: Abstraction has 1209 states and 1880 transitions. [2023-04-02 06:48:16,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:16,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 1880 transitions. [2023-04-02 06:48:16,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-02 06:48:16,460 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:16,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:16,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-02 06:48:16,461 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:16,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:16,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2115299878, now seen corresponding path program 1 times [2023-04-02 06:48:16,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:16,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656000460] [2023-04-02 06:48:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:16,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:16,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:16,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:16,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656000460] [2023-04-02 06:48:16,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656000460] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:16,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:16,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:48:16,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679639373] [2023-04-02 06:48:16,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:16,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:48:16,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:16,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:48:16,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:16,720 INFO L87 Difference]: Start difference. First operand 1209 states and 1880 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:17,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:17,440 INFO L93 Difference]: Finished difference Result 3533 states and 5541 transitions. [2023-04-02 06:48:17,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:48:17,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (2), 2 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 67 [2023-04-02 06:48:17,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:17,450 INFO L225 Difference]: With dead ends: 3533 [2023-04-02 06:48:17,450 INFO L226 Difference]: Without dead ends: 2379 [2023-04-02 06:48:17,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:48:17,454 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 434 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:17,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 671 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:17,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2379 states. [2023-04-02 06:48:17,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2379 to 1782. [2023-04-02 06:48:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1778 states have (on average 1.5590551181102361) internal successors, (2772), 1778 states have internal predecessors, (2772), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2775 transitions. [2023-04-02 06:48:17,581 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2775 transitions. Word has length 67 [2023-04-02 06:48:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:17,582 INFO L495 AbstractCegarLoop]: Abstraction has 1782 states and 2775 transitions. [2023-04-02 06:48:17,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2775 transitions. [2023-04-02 06:48:17,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:48:17,583 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:17,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:17,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-02 06:48:17,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:17,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1854067680, now seen corresponding path program 1 times [2023-04-02 06:48:17,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:17,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491786516] [2023-04-02 06:48:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:17,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:17,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:17,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:17,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491786516] [2023-04-02 06:48:17,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491786516] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:17,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:17,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:17,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90856844] [2023-04-02 06:48:17,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:17,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:17,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:17,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:17,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:17,813 INFO L87 Difference]: Start difference. First operand 1782 states and 2775 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:18,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:18,697 INFO L93 Difference]: Finished difference Result 3900 states and 6085 transitions. [2023-04-02 06:48:18,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:18,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 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 70 [2023-04-02 06:48:18,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:18,707 INFO L225 Difference]: With dead ends: 3900 [2023-04-02 06:48:18,708 INFO L226 Difference]: Without dead ends: 2665 [2023-04-02 06:48:18,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:18,711 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 133 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:18,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 508 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:48:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2023-04-02 06:48:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2663. [2023-04-02 06:48:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2659 states have (on average 1.5487025197442648) internal successors, (4118), 2659 states have internal predecessors, (4118), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 4121 transitions. [2023-04-02 06:48:18,903 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 4121 transitions. Word has length 70 [2023-04-02 06:48:18,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:18,903 INFO L495 AbstractCegarLoop]: Abstraction has 2663 states and 4121 transitions. [2023-04-02 06:48:18,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:18,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 4121 transitions. [2023-04-02 06:48:18,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:48:18,904 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:18,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:18,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-04-02 06:48:18,905 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:18,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:18,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1218108420, now seen corresponding path program 1 times [2023-04-02 06:48:18,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:18,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593186766] [2023-04-02 06:48:18,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:18,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:19,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:19,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:19,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593186766] [2023-04-02 06:48:19,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593186766] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:19,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:19,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:19,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388453346] [2023-04-02 06:48:19,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:19,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:19,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:19,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:19,135 INFO L87 Difference]: Start difference. First operand 2663 states and 4121 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:20,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:20,008 INFO L93 Difference]: Finished difference Result 5197 states and 8051 transitions. [2023-04-02 06:48:20,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:20,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 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 70 [2023-04-02 06:48:20,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:20,023 INFO L225 Difference]: With dead ends: 5197 [2023-04-02 06:48:20,023 INFO L226 Difference]: Without dead ends: 3712 [2023-04-02 06:48:20,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:20,027 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 121 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:20,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 450 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:20,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2023-04-02 06:48:20,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3710. [2023-04-02 06:48:20,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3710 states, 3706 states have (on average 1.5364274150026984) internal successors, (5694), 3706 states have internal predecessors, (5694), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:20,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3710 states to 3710 states and 5697 transitions. [2023-04-02 06:48:20,332 INFO L78 Accepts]: Start accepts. Automaton has 3710 states and 5697 transitions. Word has length 70 [2023-04-02 06:48:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:20,333 INFO L495 AbstractCegarLoop]: Abstraction has 3710 states and 5697 transitions. [2023-04-02 06:48:20,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3710 states and 5697 transitions. [2023-04-02 06:48:20,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-02 06:48:20,338 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:20,338 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:20,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-02 06:48:20,338 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:20,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:20,339 INFO L85 PathProgramCache]: Analyzing trace with hash 717652942, now seen corresponding path program 1 times [2023-04-02 06:48:20,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:20,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489054455] [2023-04-02 06:48:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:20,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:20,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:20,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:20,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489054455] [2023-04-02 06:48:20,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489054455] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:20,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:20,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:20,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860557988] [2023-04-02 06:48:20,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:20,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:20,594 INFO L87 Difference]: Start difference. First operand 3710 states and 5697 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:21,619 INFO L93 Difference]: Finished difference Result 7044 states and 10827 transitions. [2023-04-02 06:48:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 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 70 [2023-04-02 06:48:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:21,640 INFO L225 Difference]: With dead ends: 7044 [2023-04-02 06:48:21,640 INFO L226 Difference]: Without dead ends: 5002 [2023-04-02 06:48:21,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:21,647 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 127 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:21,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 490 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:48:21,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5002 states. [2023-04-02 06:48:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5002 to 5000. [2023-04-02 06:48:22,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5000 states, 4996 states have (on average 1.522417934347478) internal successors, (7606), 4996 states have internal predecessors, (7606), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:22,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5000 states to 5000 states and 7609 transitions. [2023-04-02 06:48:22,107 INFO L78 Accepts]: Start accepts. Automaton has 5000 states and 7609 transitions. Word has length 70 [2023-04-02 06:48:22,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:22,107 INFO L495 AbstractCegarLoop]: Abstraction has 5000 states and 7609 transitions. [2023-04-02 06:48:22,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:22,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5000 states and 7609 transitions. [2023-04-02 06:48:22,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-02 06:48:22,108 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:22,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:22,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-04-02 06:48:22,109 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:22,109 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:22,109 INFO L85 PathProgramCache]: Analyzing trace with hash -448841490, now seen corresponding path program 1 times [2023-04-02 06:48:22,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:22,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504181991] [2023-04-02 06:48:22,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:22,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:22,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:22,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:22,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:22,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504181991] [2023-04-02 06:48:22,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504181991] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:22,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:22,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:48:22,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940684528] [2023-04-02 06:48:22,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:22,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:48:22,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:22,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:48:22,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:22,552 INFO L87 Difference]: Start difference. First operand 5000 states and 7609 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:23,751 INFO L93 Difference]: Finished difference Result 8321 states and 12578 transitions. [2023-04-02 06:48:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:48:23,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 2 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 75 [2023-04-02 06:48:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:23,781 INFO L225 Difference]: With dead ends: 8321 [2023-04-02 06:48:23,782 INFO L226 Difference]: Without dead ends: 8319 [2023-04-02 06:48:23,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-04-02 06:48:23,785 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 278 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:23,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 1058 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:48:23,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8319 states. [2023-04-02 06:48:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8319 to 5104. [2023-04-02 06:48:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5104 states, 5100 states have (on average 1.5064705882352942) internal successors, (7683), 5100 states have internal predecessors, (7683), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:24,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5104 states to 5104 states and 7686 transitions. [2023-04-02 06:48:24,360 INFO L78 Accepts]: Start accepts. Automaton has 5104 states and 7686 transitions. Word has length 75 [2023-04-02 06:48:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:24,360 INFO L495 AbstractCegarLoop]: Abstraction has 5104 states and 7686 transitions. [2023-04-02 06:48:24,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 5104 states and 7686 transitions. [2023-04-02 06:48:24,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:48:24,362 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:24,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:24,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-04-02 06:48:24,363 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:24,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:24,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1029744082, now seen corresponding path program 1 times [2023-04-02 06:48:24,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:24,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118123816] [2023-04-02 06:48:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:24,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:24,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:48:24,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:24,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118123816] [2023-04-02 06:48:24,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118123816] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:24,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:24,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:48:24,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78091937] [2023-04-02 06:48:24,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:24,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:48:24,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:48:24,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:24,675 INFO L87 Difference]: Start difference. First operand 5104 states and 7686 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:26,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:26,420 INFO L93 Difference]: Finished difference Result 13770 states and 20785 transitions. [2023-04-02 06:48:26,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:48:26,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 1 states have call successors, (2), 2 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 101 [2023-04-02 06:48:26,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:26,458 INFO L225 Difference]: With dead ends: 13770 [2023-04-02 06:48:26,459 INFO L226 Difference]: Without dead ends: 11644 [2023-04-02 06:48:26,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:48:26,466 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 544 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 957 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:26,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 957 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:48:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11644 states. [2023-04-02 06:48:27,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11644 to 8348. [2023-04-02 06:48:27,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8348 states, 8344 states have (on average 1.5027564717162032) internal successors, (12539), 8344 states have internal predecessors, (12539), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8348 states to 8348 states and 12542 transitions. [2023-04-02 06:48:27,379 INFO L78 Accepts]: Start accepts. Automaton has 8348 states and 12542 transitions. Word has length 101 [2023-04-02 06:48:27,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:27,379 INFO L495 AbstractCegarLoop]: Abstraction has 8348 states and 12542 transitions. [2023-04-02 06:48:27,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 5 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:27,380 INFO L276 IsEmpty]: Start isEmpty. Operand 8348 states and 12542 transitions. [2023-04-02 06:48:27,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:48:27,381 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:27,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:27,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-04-02 06:48:27,382 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:27,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1665703342, now seen corresponding path program 1 times [2023-04-02 06:48:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:27,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581636522] [2023-04-02 06:48:27,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:27,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:27,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-02 06:48:27,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:27,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581636522] [2023-04-02 06:48:27,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581636522] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:27,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:27,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:48:27,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644699199] [2023-04-02 06:48:27,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:27,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:48:27,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:27,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:48:27,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:27,698 INFO L87 Difference]: Start difference. First operand 8348 states and 12542 transitions. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:29,476 INFO L93 Difference]: Finished difference Result 16605 states and 25048 transitions. [2023-04-02 06:48:29,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:48:29,478 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 1 states have call successors, (2), 2 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 101 [2023-04-02 06:48:29,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:29,508 INFO L225 Difference]: With dead ends: 16605 [2023-04-02 06:48:29,508 INFO L226 Difference]: Without dead ends: 13201 [2023-04-02 06:48:29,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:48:29,519 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 556 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:29,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1001 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:48:29,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13201 states. [2023-04-02 06:48:30,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13201 to 11794. [2023-04-02 06:48:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11794 states, 11790 states have (on average 1.503392705682782) internal successors, (17725), 11790 states have internal predecessors, (17725), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11794 states to 11794 states and 17728 transitions. [2023-04-02 06:48:30,850 INFO L78 Accepts]: Start accepts. Automaton has 11794 states and 17728 transitions. Word has length 101 [2023-04-02 06:48:30,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:30,850 INFO L495 AbstractCegarLoop]: Abstraction has 11794 states and 17728 transitions. [2023-04-02 06:48:30,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 5 states have internal predecessors, (85), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 11794 states and 17728 transitions. [2023-04-02 06:48:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-04-02 06:48:30,852 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:30,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:30,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-04-02 06:48:30,853 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:30,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:30,853 INFO L85 PathProgramCache]: Analyzing trace with hash -693502592, now seen corresponding path program 1 times [2023-04-02 06:48:30,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:30,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833234901] [2023-04-02 06:48:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:30,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:31,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:31,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-02 06:48:31,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:31,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833234901] [2023-04-02 06:48:31,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833234901] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:31,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:31,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 06:48:31,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073042523] [2023-04-02 06:48:31,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:31,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 06:48:31,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:31,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 06:48:31,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:31,186 INFO L87 Difference]: Start difference. First operand 11794 states and 17728 transitions. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:33,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:33,109 INFO L93 Difference]: Finished difference Result 18554 states and 27978 transitions. [2023-04-02 06:48:33,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 06:48:33,111 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 1 states have call successors, (2), 2 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 101 [2023-04-02 06:48:33,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:33,147 INFO L225 Difference]: With dead ends: 18554 [2023-04-02 06:48:33,147 INFO L226 Difference]: Without dead ends: 15150 [2023-04-02 06:48:33,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-04-02 06:48:33,161 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 550 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:33,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1091 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-02 06:48:33,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15150 states. [2023-04-02 06:48:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15150 to 14178. [2023-04-02 06:48:34,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14178 states, 14174 states have (on average 1.5035981374347396) internal successors, (21312), 14174 states have internal predecessors, (21312), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14178 states to 14178 states and 21315 transitions. [2023-04-02 06:48:34,600 INFO L78 Accepts]: Start accepts. Automaton has 14178 states and 21315 transitions. Word has length 101 [2023-04-02 06:48:34,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:34,601 INFO L495 AbstractCegarLoop]: Abstraction has 14178 states and 21315 transitions. [2023-04-02 06:48:34,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 5 states have internal predecessors, (91), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:34,601 INFO L276 IsEmpty]: Start isEmpty. Operand 14178 states and 21315 transitions. [2023-04-02 06:48:34,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-02 06:48:34,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:34,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:34,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-04-02 06:48:34,604 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:34,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:34,605 INFO L85 PathProgramCache]: Analyzing trace with hash 427249434, now seen corresponding path program 1 times [2023-04-02 06:48:34,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:34,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360173981] [2023-04-02 06:48:34,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:34,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:34,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:48:34,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:34,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360173981] [2023-04-02 06:48:34,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360173981] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:34,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:34,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:34,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123074593] [2023-04-02 06:48:34,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:34,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:34,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:34,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:34,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:34,867 INFO L87 Difference]: Start difference. First operand 14178 states and 21315 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:37,113 INFO L93 Difference]: Finished difference Result 30622 states and 46203 transitions. [2023-04-02 06:48:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:37,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 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 102 [2023-04-02 06:48:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:37,167 INFO L225 Difference]: With dead ends: 30622 [2023-04-02 06:48:37,168 INFO L226 Difference]: Without dead ends: 22778 [2023-04-02 06:48:37,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:37,192 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 112 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:37,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 398 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:48:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22778 states. [2023-04-02 06:48:39,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22778 to 22726. [2023-04-02 06:48:39,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22726 states, 22722 states have (on average 1.5041809699850366) internal successors, (34178), 22722 states have internal predecessors, (34178), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:39,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22726 states to 22726 states and 34181 transitions. [2023-04-02 06:48:39,417 INFO L78 Accepts]: Start accepts. Automaton has 22726 states and 34181 transitions. Word has length 102 [2023-04-02 06:48:39,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:39,418 INFO L495 AbstractCegarLoop]: Abstraction has 22726 states and 34181 transitions. [2023-04-02 06:48:39,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:39,418 INFO L276 IsEmpty]: Start isEmpty. Operand 22726 states and 34181 transitions. [2023-04-02 06:48:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-02 06:48:39,421 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:39,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:39,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-04-02 06:48:39,421 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:39,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:39,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1795685017, now seen corresponding path program 1 times [2023-04-02 06:48:39,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:39,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656277189] [2023-04-02 06:48:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:39,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:39,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:39,716 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 06:48:39,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:39,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656277189] [2023-04-02 06:48:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656277189] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:39,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 06:48:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360762577] [2023-04-02 06:48:39,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:39,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 06:48:39,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 06:48:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:39,719 INFO L87 Difference]: Start difference. First operand 22726 states and 34181 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:42,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:42,706 INFO L93 Difference]: Finished difference Result 38532 states and 58157 transitions. [2023-04-02 06:48:42,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 06:48:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 2 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 102 [2023-04-02 06:48:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:42,758 INFO L225 Difference]: With dead ends: 38532 [2023-04-02 06:48:42,759 INFO L226 Difference]: Without dead ends: 30555 [2023-04-02 06:48:42,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-02 06:48:42,783 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 244 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:42,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 773 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-02 06:48:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30555 states. [2023-04-02 06:48:45,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30555 to 28750. [2023-04-02 06:48:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28750 states, 28746 states have (on average 1.502852570792458) internal successors, (43201), 28746 states have internal predecessors, (43201), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:45,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28750 states to 28750 states and 43204 transitions. [2023-04-02 06:48:45,452 INFO L78 Accepts]: Start accepts. Automaton has 28750 states and 43204 transitions. Word has length 102 [2023-04-02 06:48:45,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:45,453 INFO L495 AbstractCegarLoop]: Abstraction has 28750 states and 43204 transitions. [2023-04-02 06:48:45,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:45,453 INFO L276 IsEmpty]: Start isEmpty. Operand 28750 states and 43204 transitions. [2023-04-02 06:48:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-02 06:48:45,458 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:45,459 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:45,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-04-02 06:48:45,459 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:45,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1522220688, now seen corresponding path program 1 times [2023-04-02 06:48:45,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:45,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465474890] [2023-04-02 06:48:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:45,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:45,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:45,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:45,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465474890] [2023-04-02 06:48:45,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465474890] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:45,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:45,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:45,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046809745] [2023-04-02 06:48:45,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:45,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:45,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:45,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:45,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:45,719 INFO L87 Difference]: Start difference. First operand 28750 states and 43204 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:50,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:48:50,809 INFO L93 Difference]: Finished difference Result 84345 states and 126488 transitions. [2023-04-02 06:48:50,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:48:50,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 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 103 [2023-04-02 06:48:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:48:50,908 INFO L225 Difference]: With dead ends: 84345 [2023-04-02 06:48:50,909 INFO L226 Difference]: Without dead ends: 55670 [2023-04-02 06:48:50,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:48:50,950 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 148 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:48:50,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 493 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:48:51,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55670 states. [2023-04-02 06:48:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55670 to 55668. [2023-04-02 06:48:56,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55668 states, 55664 states have (on average 1.488089249784421) internal successors, (82833), 55664 states have internal predecessors, (82833), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55668 states to 55668 states and 82836 transitions. [2023-04-02 06:48:56,273 INFO L78 Accepts]: Start accepts. Automaton has 55668 states and 82836 transitions. Word has length 103 [2023-04-02 06:48:56,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:48:56,273 INFO L495 AbstractCegarLoop]: Abstraction has 55668 states and 82836 transitions. [2023-04-02 06:48:56,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:48:56,274 INFO L276 IsEmpty]: Start isEmpty. Operand 55668 states and 82836 transitions. [2023-04-02 06:48:56,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-04-02 06:48:56,277 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:48:56,277 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:48:56,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-04-02 06:48:56,277 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:48:56,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:48:56,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1243674406, now seen corresponding path program 1 times [2023-04-02 06:48:56,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:48:56,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98146787] [2023-04-02 06:48:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:48:56,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:48:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:56,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:48:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:48:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 06:48:56,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:48:56,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98146787] [2023-04-02 06:48:56,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98146787] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:48:56,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:48:56,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:48:56,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707504666] [2023-04-02 06:48:56,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:48:56,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:48:56,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:48:56,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:48:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:48:56,673 INFO L87 Difference]: Start difference. First operand 55668 states and 82836 transitions. Second operand has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:07,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:07,598 INFO L93 Difference]: Finished difference Result 163239 states and 242337 transitions. [2023-04-02 06:49:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 06:49:07,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 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 103 [2023-04-02 06:49:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:07,976 INFO L225 Difference]: With dead ends: 163239 [2023-04-02 06:49:07,976 INFO L226 Difference]: Without dead ends: 107719 [2023-04-02 06:49:08,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 06:49:08,057 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 167 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:08,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 531 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 06:49:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107719 states. [2023-04-02 06:49:18,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107719 to 107717. [2023-04-02 06:49:18,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107717 states, 107713 states have (on average 1.4724128006832973) internal successors, (158598), 107713 states have internal predecessors, (158598), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107717 states to 107717 states and 158601 transitions. [2023-04-02 06:49:18,931 INFO L78 Accepts]: Start accepts. Automaton has 107717 states and 158601 transitions. Word has length 103 [2023-04-02 06:49:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:18,932 INFO L495 AbstractCegarLoop]: Abstraction has 107717 states and 158601 transitions. [2023-04-02 06:49:18,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.0) internal successors, (100), 3 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 107717 states and 158601 transitions. [2023-04-02 06:49:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 06:49:18,938 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:18,938 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:18,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-04-02 06:49:18,939 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:18,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash 156897213, now seen corresponding path program 1 times [2023-04-02 06:49:18,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:18,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217007193] [2023-04-02 06:49:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:18,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:18,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:19,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-04-02 06:49:19,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:19,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217007193] [2023-04-02 06:49:19,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217007193] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:19,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:19,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:19,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138067619] [2023-04-02 06:49:19,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:19,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:19,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:19,177 INFO L87 Difference]: Start difference. First operand 107717 states and 158601 transitions. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:34,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 06:49:34,839 INFO L93 Difference]: Finished difference Result 256219 states and 378781 transitions. [2023-04-02 06:49:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 06:49:34,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 2 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 104 [2023-04-02 06:49:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 06:49:35,368 INFO L225 Difference]: With dead ends: 256219 [2023-04-02 06:49:35,368 INFO L226 Difference]: Without dead ends: 148757 [2023-04-02 06:49:35,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:35,492 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 132 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-02 06:49:35,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 425 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-02 06:49:35,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148757 states. [2023-04-02 06:49:50,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148757 to 143547. [2023-04-02 06:49:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143547 states, 143543 states have (on average 1.4608862849459743) internal successors, (209700), 143543 states have internal predecessors, (209700), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:50,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143547 states to 143547 states and 209703 transitions. [2023-04-02 06:49:50,690 INFO L78 Accepts]: Start accepts. Automaton has 143547 states and 209703 transitions. Word has length 104 [2023-04-02 06:49:50,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 06:49:50,691 INFO L495 AbstractCegarLoop]: Abstraction has 143547 states and 209703 transitions. [2023-04-02 06:49:50,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 3 states have internal predecessors, (90), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 06:49:50,691 INFO L276 IsEmpty]: Start isEmpty. Operand 143547 states and 209703 transitions. [2023-04-02 06:49:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-04-02 06:49:50,697 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 06:49:50,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 06:49:50,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-04-02 06:49:50,698 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 06:49:50,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 06:49:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1194779357, now seen corresponding path program 1 times [2023-04-02 06:49:50,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 06:49:50,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33018382] [2023-04-02 06:49:50,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 06:49:50,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 06:49:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:50,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 06:49:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 06:49:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-04-02 06:49:50,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 06:49:50,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33018382] [2023-04-02 06:49:50,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33018382] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 06:49:50,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 06:49:50,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 06:49:50,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129718117] [2023-04-02 06:49:50,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 06:49:50,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 06:49:50,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 06:49:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 06:49:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 06:49:50,964 INFO L87 Difference]: Start difference. First operand 143547 states and 209703 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)