./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem18_label01.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem18_label01.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d0f957f5b0e83c1c14555e9ea8bf41ba11ff21748daf88fa4699e5464ac5d4ed --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:45:15,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:45:15,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:45:16,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:45:16,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:45:16,005 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:45:16,006 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:45:16,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:45:16,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:45:16,009 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:45:16,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:45:16,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:45:16,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:45:16,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:45:16,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:45:16,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:45:16,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:45:16,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:45:16,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:45:16,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:45:16,017 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:45:16,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:45:16,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:45:16,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:45:16,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:45:16,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:45:16,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:45:16,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:45:16,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:45:16,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:45:16,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:45:16,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:45:16,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:45:16,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:45:16,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:45:16,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:45:16,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:45:16,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:45:16,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:45:16,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:45:16,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:45:16,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:45:16,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:45:16,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:45:16,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:45:16,062 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:45:16,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:45:16,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:45:16,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:45:16,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:45:16,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:45:16,064 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:45:16,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:45:16,065 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:45:16,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:45:16,065 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:45:16,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:45:16,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:45:16,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:45:16,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:45:16,066 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:45:16,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:45:16,066 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:45:16,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:45:16,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:45:16,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:45:16,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:45:16,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:45:16,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:45:16,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:45:16,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:45:16,068 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:45:16,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:45:16,068 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:45:16,068 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:45:16,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:45:16,069 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d0f957f5b0e83c1c14555e9ea8bf41ba11ff21748daf88fa4699e5464ac5d4ed [2022-07-19 12:45:16,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:45:16,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:45:16,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:45:16,290 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:45:16,290 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:45:16,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem18_label01.c [2022-07-19 12:45:16,331 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e20a2ffa/5f43ccaee9b44f019052d5387e90287f/FLAG0552171f5 [2022-07-19 12:45:16,838 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:45:16,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label01.c [2022-07-19 12:45:16,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e20a2ffa/5f43ccaee9b44f019052d5387e90287f/FLAG0552171f5 [2022-07-19 12:45:17,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e20a2ffa/5f43ccaee9b44f019052d5387e90287f [2022-07-19 12:45:17,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:45:17,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:45:17,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:45:17,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:45:17,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:45:17,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:45:17" (1/1) ... [2022-07-19 12:45:17,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bcd7d8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:17, skipping insertion in model container [2022-07-19 12:45:17,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:45:17" (1/1) ... [2022-07-19 12:45:17,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:45:17,164 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:45:17,371 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label01.c[2998,3011] [2022-07-19 12:45:17,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:45:17,789 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:45:17,810 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem18_label01.c[2998,3011] [2022-07-19 12:45:18,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:45:18,112 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:45:18,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18 WrapperNode [2022-07-19 12:45:18,113 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:45:18,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:45:18,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:45:18,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:45:18,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,281 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2022-07-19 12:45:18,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:45:18,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:45:18,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:45:18,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:45:18,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,437 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:45:18,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:45:18,439 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:45:18,439 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:45:18,440 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (1/1) ... [2022-07-19 12:45:18,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:45:18,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:45:18,537 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) [2022-07-19 12:45:18,539 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 [2022-07-19 12:45:18,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:45:18,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:45:18,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:45:18,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:45:18,650 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:45:18,651 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:45:20,893 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:45:20,909 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:45:20,909 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:45:20,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:45:20 BoogieIcfgContainer [2022-07-19 12:45:20,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:45:20,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:45:20,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:45:20,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:45:20,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:45:17" (1/3) ... [2022-07-19 12:45:20,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785a0b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:45:20, skipping insertion in model container [2022-07-19 12:45:20,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:45:18" (2/3) ... [2022-07-19 12:45:20,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@785a0b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:45:20, skipping insertion in model container [2022-07-19 12:45:20,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:45:20" (3/3) ... [2022-07-19 12:45:20,919 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label01.c [2022-07-19 12:45:20,930 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:45:20,930 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:45:20,975 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:45:20,980 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4ad87020, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@121429f5 [2022-07-19 12:45:20,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:45:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:20,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 12:45:20,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:20,991 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] [2022-07-19 12:45:20,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:20,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash 678582746, now seen corresponding path program 1 times [2022-07-19 12:45:21,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:21,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015882544] [2022-07-19 12:45:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:21,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:45:21,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015882544] [2022-07-19 12:45:21,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015882544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:21,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:21,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:45:21,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548117658] [2022-07-19 12:45:21,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:21,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:21,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:21,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:21,186 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:23,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:23,893 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2022-07-19 12:45:23,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:23,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 12:45:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:23,912 INFO L225 Difference]: With dead ends: 2205 [2022-07-19 12:45:23,912 INFO L226 Difference]: Without dead ends: 1384 [2022-07-19 12:45:23,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:23,923 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 722 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2018 mSolverCounterSat, 967 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 967 IncrementalHoareTripleChecker+Valid, 2018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:23,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 291 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [967 Valid, 2018 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:45:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-07-19 12:45:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2022-07-19 12:45:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.7339117859725235) internal successors, (2398), 1383 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:23,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2398 transitions. [2022-07-19 12:45:23,997 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2398 transitions. Word has length 26 [2022-07-19 12:45:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:23,997 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 2398 transitions. [2022-07-19 12:45:23,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2398 transitions. [2022-07-19 12:45:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 12:45:24,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:24,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:45:24,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:45:24,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash 427147808, now seen corresponding path program 1 times [2022-07-19 12:45:24,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:24,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981963181] [2022-07-19 12:45:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:24,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:45:24,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:24,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981963181] [2022-07-19 12:45:24,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981963181] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:24,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:24,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:45:24,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744612490] [2022-07-19 12:45:24,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:24,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:45:24,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:24,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:45:24,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:24,119 INFO L87 Difference]: Start difference. First operand 1384 states and 2398 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:27,483 INFO L93 Difference]: Finished difference Result 4842 states and 8275 transitions. [2022-07-19 12:45:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 12:45:27,484 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-19 12:45:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:27,493 INFO L225 Difference]: With dead ends: 4842 [2022-07-19 12:45:27,493 INFO L226 Difference]: Without dead ends: 3460 [2022-07-19 12:45:27,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:45:27,496 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2035 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 1421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2035 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 4689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1421 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:27,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2035 Valid, 135 Invalid, 4689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1421 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 12:45:27,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-07-19 12:45:27,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3454. [2022-07-19 12:45:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3454 states, 3453 states have (on average 1.5409788589632203) internal successors, (5321), 3453 states have internal predecessors, (5321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:27,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3454 states to 3454 states and 5321 transitions. [2022-07-19 12:45:27,547 INFO L78 Accepts]: Start accepts. Automaton has 3454 states and 5321 transitions. Word has length 95 [2022-07-19 12:45:27,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:27,548 INFO L495 AbstractCegarLoop]: Abstraction has 3454 states and 5321 transitions. [2022-07-19 12:45:27,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:27,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3454 states and 5321 transitions. [2022-07-19 12:45:27,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-19 12:45:27,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:27,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:27,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:45:27,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:27,559 INFO L85 PathProgramCache]: Analyzing trace with hash 567080769, now seen corresponding path program 1 times [2022-07-19 12:45:27,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:27,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242903019] [2022-07-19 12:45:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:27,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:27,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:45:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:27,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242903019] [2022-07-19 12:45:27,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242903019] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:27,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:27,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:45:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11393934] [2022-07-19 12:45:27,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:27,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:45:27,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:27,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:45:27,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:27,768 INFO L87 Difference]: Start difference. First operand 3454 states and 5321 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:31,188 INFO L93 Difference]: Finished difference Result 11048 states and 17166 transitions. [2022-07-19 12:45:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:45:31,193 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-07-19 12:45:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:31,222 INFO L225 Difference]: With dead ends: 11048 [2022-07-19 12:45:31,222 INFO L226 Difference]: Without dead ends: 7596 [2022-07-19 12:45:31,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:45:31,236 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 1874 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4380 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 5009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 4380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:31,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1874 Valid, 649 Invalid, 5009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 4380 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-19 12:45:31,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7596 states. [2022-07-19 12:45:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7596 to 6904. [2022-07-19 12:45:31,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.3273938867159205) internal successors, (9163), 6903 states have internal predecessors, (9163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 9163 transitions. [2022-07-19 12:45:31,383 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 9163 transitions. Word has length 144 [2022-07-19 12:45:31,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:31,384 INFO L495 AbstractCegarLoop]: Abstraction has 6904 states and 9163 transitions. [2022-07-19 12:45:31,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:31,385 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 9163 transitions. [2022-07-19 12:45:31,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-07-19 12:45:31,392 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:31,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:31,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:45:31,393 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:31,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:31,395 INFO L85 PathProgramCache]: Analyzing trace with hash -337805403, now seen corresponding path program 1 times [2022-07-19 12:45:31,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717762470] [2022-07-19 12:45:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:31,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:45:31,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:31,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717762470] [2022-07-19 12:45:31,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717762470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:31,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:31,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:45:31,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369150047] [2022-07-19 12:45:31,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:31,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:45:31,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:31,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:45:31,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:31,650 INFO L87 Difference]: Start difference. First operand 6904 states and 9163 transitions. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:33,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:33,632 INFO L93 Difference]: Finished difference Result 16621 states and 22106 transitions. [2022-07-19 12:45:33,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:45:33,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 285 [2022-07-19 12:45:33,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:33,683 INFO L225 Difference]: With dead ends: 16621 [2022-07-19 12:45:33,686 INFO L226 Difference]: Without dead ends: 9666 [2022-07-19 12:45:33,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:45:33,715 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 517 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3039 mSolverCounterSat, 688 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 3727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 688 IncrementalHoareTripleChecker+Valid, 3039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:33,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 639 Invalid, 3727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [688 Valid, 3039 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 12:45:33,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9666 states. [2022-07-19 12:45:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9666 to 9664. [2022-07-19 12:45:34,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9664 states, 9663 states have (on average 1.1779985511745834) internal successors, (11383), 9663 states have internal predecessors, (11383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9664 states to 9664 states and 11383 transitions. [2022-07-19 12:45:34,056 INFO L78 Accepts]: Start accepts. Automaton has 9664 states and 11383 transitions. Word has length 285 [2022-07-19 12:45:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:34,057 INFO L495 AbstractCegarLoop]: Abstraction has 9664 states and 11383 transitions. [2022-07-19 12:45:34,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:34,058 INFO L276 IsEmpty]: Start isEmpty. Operand 9664 states and 11383 transitions. [2022-07-19 12:45:34,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 841 [2022-07-19 12:45:34,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:34,087 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:34,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:45:34,088 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:34,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:34,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1767080750, now seen corresponding path program 1 times [2022-07-19 12:45:34,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:34,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100121685] [2022-07-19 12:45:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:34,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 313 trivial. 0 not checked. [2022-07-19 12:45:34,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:34,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100121685] [2022-07-19 12:45:34,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100121685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:45:34,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196368847] [2022-07-19 12:45:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:34,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:34,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:45:34,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:45:34,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:45:34,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:34,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 964 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:45:35,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:45:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2022-07-19 12:45:35,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:45:35,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196368847] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:35,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:45:35,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 12:45:35,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098048888] [2022-07-19 12:45:35,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:35,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:35,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:35,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:35,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:45:35,912 INFO L87 Difference]: Start difference. First operand 9664 states and 11383 transitions. Second operand has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:37,910 INFO L93 Difference]: Finished difference Result 22086 states and 26238 transitions. [2022-07-19 12:45:37,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 840 [2022-07-19 12:45:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:37,959 INFO L225 Difference]: With dead ends: 22086 [2022-07-19 12:45:37,960 INFO L226 Difference]: Without dead ends: 12424 [2022-07-19 12:45:37,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 839 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:45:37,971 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 195 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:37,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 275 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 12:45:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12424 states. [2022-07-19 12:45:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12424 to 11734. [2022-07-19 12:45:38,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11734 states, 11733 states have (on average 1.1751470212221937) internal successors, (13788), 11733 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:38,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11734 states to 11734 states and 13788 transitions. [2022-07-19 12:45:38,146 INFO L78 Accepts]: Start accepts. Automaton has 11734 states and 13788 transitions. Word has length 840 [2022-07-19 12:45:38,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:38,152 INFO L495 AbstractCegarLoop]: Abstraction has 11734 states and 13788 transitions. [2022-07-19 12:45:38,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.33333333333334) internal successors, (520), 2 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:38,153 INFO L276 IsEmpty]: Start isEmpty. Operand 11734 states and 13788 transitions. [2022-07-19 12:45:38,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 911 [2022-07-19 12:45:38,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:38,176 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:38,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 12:45:38,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:38,397 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:38,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1900721073, now seen corresponding path program 1 times [2022-07-19 12:45:38,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:38,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221225705] [2022-07-19 12:45:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:38,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:38,919 INFO L134 CoverageAnalysis]: Checked inductivity of 508 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2022-07-19 12:45:38,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:38,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221225705] [2022-07-19 12:45:38,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221225705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:38,920 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:38,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:45:38,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209793138] [2022-07-19 12:45:38,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:38,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:38,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:38,921 INFO L87 Difference]: Start difference. First operand 11734 states and 13788 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:40,877 INFO L93 Difference]: Finished difference Result 28296 states and 34141 transitions. [2022-07-19 12:45:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:40,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 910 [2022-07-19 12:45:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:40,902 INFO L225 Difference]: With dead ends: 28296 [2022-07-19 12:45:40,902 INFO L226 Difference]: Without dead ends: 16564 [2022-07-19 12:45:40,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:40,915 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 226 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1667 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 2269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:40,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 389 Invalid, 2269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1667 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 12:45:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16564 states. [2022-07-19 12:45:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16564 to 14494. [2022-07-19 12:45:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14494 states, 14493 states have (on average 1.155937349065066) internal successors, (16753), 14493 states have internal predecessors, (16753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14494 states to 14494 states and 16753 transitions. [2022-07-19 12:45:41,204 INFO L78 Accepts]: Start accepts. Automaton has 14494 states and 16753 transitions. Word has length 910 [2022-07-19 12:45:41,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:41,207 INFO L495 AbstractCegarLoop]: Abstraction has 14494 states and 16753 transitions. [2022-07-19 12:45:41,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:41,207 INFO L276 IsEmpty]: Start isEmpty. Operand 14494 states and 16753 transitions. [2022-07-19 12:45:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 926 [2022-07-19 12:45:41,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:41,215 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:41,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:45:41,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:41,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1528893440, now seen corresponding path program 1 times [2022-07-19 12:45:41,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:41,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144890798] [2022-07-19 12:45:41,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:41,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 538 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2022-07-19 12:45:41,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:41,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144890798] [2022-07-19 12:45:41,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144890798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:41,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:41,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:45:41,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487374749] [2022-07-19 12:45:41,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:41,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:41,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:41,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:41,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:41,489 INFO L87 Difference]: Start difference. First operand 14494 states and 16753 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:43,359 INFO L93 Difference]: Finished difference Result 32436 states and 37375 transitions. [2022-07-19 12:45:43,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 925 [2022-07-19 12:45:43,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:43,411 INFO L225 Difference]: With dead ends: 32436 [2022-07-19 12:45:43,411 INFO L226 Difference]: Without dead ends: 17944 [2022-07-19 12:45:43,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:43,436 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 249 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 2308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 517 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:43,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 77 Invalid, 2308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [517 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:45:43,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17944 states. [2022-07-19 12:45:43,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17944 to 17944. [2022-07-19 12:45:43,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17944 states, 17943 states have (on average 1.1281836928049935) internal successors, (20243), 17943 states have internal predecessors, (20243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:43,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17944 states to 17944 states and 20243 transitions. [2022-07-19 12:45:43,643 INFO L78 Accepts]: Start accepts. Automaton has 17944 states and 20243 transitions. Word has length 925 [2022-07-19 12:45:43,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:43,644 INFO L495 AbstractCegarLoop]: Abstraction has 17944 states and 20243 transitions. [2022-07-19 12:45:43,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 2 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 17944 states and 20243 transitions. [2022-07-19 12:45:43,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2022-07-19 12:45:43,650 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:43,651 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:43,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:45:43,651 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:43,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:43,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1497919545, now seen corresponding path program 1 times [2022-07-19 12:45:43,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:43,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973500317] [2022-07-19 12:45:43,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:43,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:43,956 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-19 12:45:43,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:43,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973500317] [2022-07-19 12:45:43,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973500317] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:43,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:45:43,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:45:43,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308661050] [2022-07-19 12:45:43,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:43,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:43,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:43,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:43,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:43,958 INFO L87 Difference]: Start difference. First operand 17944 states and 20243 transitions. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:45,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:45,801 INFO L93 Difference]: Finished difference Result 43476 states and 49395 transitions. [2022-07-19 12:45:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:45,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 958 [2022-07-19 12:45:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:45,863 INFO L225 Difference]: With dead ends: 43476 [2022-07-19 12:45:45,863 INFO L226 Difference]: Without dead ends: 25534 [2022-07-19 12:45:45,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:45:45,880 INFO L413 NwaCegarLoop]: 1009 mSDtfsCounter, 576 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1985 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 2329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 1985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:45,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1015 Invalid, 2329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [344 Valid, 1985 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:45:45,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25534 states. [2022-07-19 12:45:46,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25534 to 25534. [2022-07-19 12:45:46,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25534 states, 25533 states have (on average 1.1112286061175733) internal successors, (28373), 25533 states have internal predecessors, (28373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:46,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25534 states to 25534 states and 28373 transitions. [2022-07-19 12:45:46,188 INFO L78 Accepts]: Start accepts. Automaton has 25534 states and 28373 transitions. Word has length 958 [2022-07-19 12:45:46,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:46,189 INFO L495 AbstractCegarLoop]: Abstraction has 25534 states and 28373 transitions. [2022-07-19 12:45:46,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 25534 states and 28373 transitions. [2022-07-19 12:45:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 966 [2022-07-19 12:45:46,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:46,203 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:46,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:45:46,204 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:46,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:46,204 INFO L85 PathProgramCache]: Analyzing trace with hash -67821150, now seen corresponding path program 1 times [2022-07-19 12:45:46,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:46,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714090193] [2022-07-19 12:45:46,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:46,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 321 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:45:46,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:46,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714090193] [2022-07-19 12:45:46,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714090193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:45:46,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044855612] [2022-07-19 12:45:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:46,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:46,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:45:46,613 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:45:46,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:45:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:45:46,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:45:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-07-19 12:45:46,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:45:46,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044855612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:46,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:45:46,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 12:45:46,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486100378] [2022-07-19 12:45:46,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:46,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:46,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:46,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:46,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:45:46,974 INFO L87 Difference]: Start difference. First operand 25534 states and 28373 transitions. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:48,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:48,619 INFO L93 Difference]: Finished difference Result 51066 states and 56744 transitions. [2022-07-19 12:45:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:48,620 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 965 [2022-07-19 12:45:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:48,650 INFO L225 Difference]: With dead ends: 51066 [2022-07-19 12:45:48,650 INFO L226 Difference]: Without dead ends: 25534 [2022-07-19 12:45:48,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 965 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:45:48,669 INFO L413 NwaCegarLoop]: 773 mSDtfsCounter, 771 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1974 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 2165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:48,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [771 Valid, 780 Invalid, 2165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1974 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:45:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25534 states. [2022-07-19 12:45:48,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25534 to 25534. [2022-07-19 12:45:48,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25534 states, 25533 states have (on average 1.093330200133161) internal successors, (27916), 25533 states have internal predecessors, (27916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:49,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25534 states to 25534 states and 27916 transitions. [2022-07-19 12:45:49,070 INFO L78 Accepts]: Start accepts. Automaton has 25534 states and 27916 transitions. Word has length 965 [2022-07-19 12:45:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:49,071 INFO L495 AbstractCegarLoop]: Abstraction has 25534 states and 27916 transitions. [2022-07-19 12:45:49,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:49,071 INFO L276 IsEmpty]: Start isEmpty. Operand 25534 states and 27916 transitions. [2022-07-19 12:45:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2022-07-19 12:45:49,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:49,086 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:49,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 12:45:49,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-19 12:45:49,305 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:49,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1725054057, now seen corresponding path program 1 times [2022-07-19 12:45:49,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:49,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884616206] [2022-07-19 12:45:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:49,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:49,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 464 proven. 578 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-19 12:45:49,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:49,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884616206] [2022-07-19 12:45:49,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884616206] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:45:49,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877204155] [2022-07-19 12:45:49,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:49,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:45:49,868 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:45:49,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 12:45:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:50,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:45:50,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:45:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 438 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2022-07-19 12:45:50,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:45:50,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877204155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:50,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:45:50,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 12:45:50,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563000614] [2022-07-19 12:45:50,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:50,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:50,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:50,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:50,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:45:50,190 INFO L87 Difference]: Start difference. First operand 25534 states and 27916 transitions. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:51,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:51,907 INFO L93 Difference]: Finished difference Result 58656 states and 65007 transitions. [2022-07-19 12:45:51,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:51,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1078 [2022-07-19 12:45:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:51,945 INFO L225 Difference]: With dead ends: 58656 [2022-07-19 12:45:51,946 INFO L226 Difference]: Without dead ends: 33124 [2022-07-19 12:45:51,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 1078 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:45:51,963 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 699 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1821 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 1821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:51,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 165 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 1821 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-19 12:45:51,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33124 states. [2022-07-19 12:45:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33124 to 33124. [2022-07-19 12:45:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33124 states, 33123 states have (on average 1.094043413941974) internal successors, (36238), 33123 states have internal predecessors, (36238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:52,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33124 states to 33124 states and 36238 transitions. [2022-07-19 12:45:52,345 INFO L78 Accepts]: Start accepts. Automaton has 33124 states and 36238 transitions. Word has length 1078 [2022-07-19 12:45:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:52,346 INFO L495 AbstractCegarLoop]: Abstraction has 33124 states and 36238 transitions. [2022-07-19 12:45:52,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 33124 states and 36238 transitions. [2022-07-19 12:45:52,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1102 [2022-07-19 12:45:52,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:52,361 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:52,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 12:45:52,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:52,576 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:52,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:52,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1244000598, now seen corresponding path program 1 times [2022-07-19 12:45:52,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:52,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808265807] [2022-07-19 12:45:52,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:52,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:52,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:52,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 380 proven. 555 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2022-07-19 12:45:53,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:53,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808265807] [2022-07-19 12:45:53,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808265807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:45:53,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461779703] [2022-07-19 12:45:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:53,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:53,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:45:53,016 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:45:53,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 12:45:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:53,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:45:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:45:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 723 trivial. 0 not checked. [2022-07-19 12:45:53,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:45:53,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461779703] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:53,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:45:53,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 12:45:53,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574348997] [2022-07-19 12:45:53,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:53,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:45:53,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:53,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:45:53,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:45:53,352 INFO L87 Difference]: Start difference. First operand 33124 states and 36238 transitions. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:55,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:55,344 INFO L93 Difference]: Finished difference Result 73146 states and 80366 transitions. [2022-07-19 12:45:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:45:55,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1101 [2022-07-19 12:45:55,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:55,383 INFO L225 Difference]: With dead ends: 73146 [2022-07-19 12:45:55,384 INFO L226 Difference]: Without dead ends: 38644 [2022-07-19 12:45:55,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:45:55,402 INFO L413 NwaCegarLoop]: 967 mSDtfsCounter, 649 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1703 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 1703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:55,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 973 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 1703 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:45:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38644 states. [2022-07-19 12:45:55,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38644 to 35884. [2022-07-19 12:45:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35884 states, 35883 states have (on average 1.0488810857509128) internal successors, (37637), 35883 states have internal predecessors, (37637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35884 states to 35884 states and 37637 transitions. [2022-07-19 12:45:55,712 INFO L78 Accepts]: Start accepts. Automaton has 35884 states and 37637 transitions. Word has length 1101 [2022-07-19 12:45:55,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:55,712 INFO L495 AbstractCegarLoop]: Abstraction has 35884 states and 37637 transitions. [2022-07-19 12:45:55,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:55,713 INFO L276 IsEmpty]: Start isEmpty. Operand 35884 states and 37637 transitions. [2022-07-19 12:45:55,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1241 [2022-07-19 12:45:55,727 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:55,728 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:55,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 12:45:55,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:55,936 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:55,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash 118988770, now seen corresponding path program 1 times [2022-07-19 12:45:55,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:55,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762029020] [2022-07-19 12:45:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:55,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:45:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:56,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 923 proven. 768 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 12:45:56,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:45:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762029020] [2022-07-19 12:45:56,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762029020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:45:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538226690] [2022-07-19 12:45:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:56,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:45:56,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:45:56,489 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:45:56,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 12:45:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:45:56,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 12:45:56,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:45:57,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1715 backedges. 1019 proven. 0 refuted. 0 times theorem prover too weak. 696 trivial. 0 not checked. [2022-07-19 12:45:57,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:45:57,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538226690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:45:57,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:45:57,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-07-19 12:45:57,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10479015] [2022-07-19 12:45:57,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:45:57,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:45:57,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:45:57,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:45:57,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-19 12:45:57,341 INFO L87 Difference]: Start difference. First operand 35884 states and 37637 transitions. Second operand has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:59,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:45:59,333 INFO L93 Difference]: Finished difference Result 71884 states and 75434 transitions. [2022-07-19 12:45:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 12:45:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1240 [2022-07-19 12:45:59,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:45:59,365 INFO L225 Difference]: With dead ends: 71884 [2022-07-19 12:45:59,365 INFO L226 Difference]: Without dead ends: 36692 [2022-07-19 12:45:59,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1250 GetRequests, 1240 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-07-19 12:45:59,383 INFO L413 NwaCegarLoop]: 994 mSDtfsCounter, 1190 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 1655 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:45:59,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1190 Valid, 1655 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2001 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:45:59,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36692 states. [2022-07-19 12:45:59,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36692 to 36574. [2022-07-19 12:45:59,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36574 states, 36573 states have (on average 1.0480135619172615) internal successors, (38329), 36573 states have internal predecessors, (38329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36574 states to 36574 states and 38329 transitions. [2022-07-19 12:45:59,724 INFO L78 Accepts]: Start accepts. Automaton has 36574 states and 38329 transitions. Word has length 1240 [2022-07-19 12:45:59,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:45:59,725 INFO L495 AbstractCegarLoop]: Abstraction has 36574 states and 38329 transitions. [2022-07-19 12:45:59,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:45:59,725 INFO L276 IsEmpty]: Start isEmpty. Operand 36574 states and 38329 transitions. [2022-07-19 12:45:59,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1258 [2022-07-19 12:45:59,743 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:45:59,744 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:45:59,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 12:45:59,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 12:45:59,962 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:45:59,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:45:59,963 INFO L85 PathProgramCache]: Analyzing trace with hash 438114686, now seen corresponding path program 1 times [2022-07-19 12:45:59,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:45:59,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483149706] [2022-07-19 12:45:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:45:59,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:00,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 957 proven. 819 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 12:46:00,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:00,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483149706] [2022-07-19 12:46:00,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483149706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:46:00,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112642588] [2022-07-19 12:46:00,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:00,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:46:00,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:46:00,498 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:46:00,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 12:46:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:00,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:46:00,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:46:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 1181 proven. 0 refuted. 0 times theorem prover too weak. 619 trivial. 0 not checked. [2022-07-19 12:46:00,846 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:46:00,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112642588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:00,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:46:00,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-07-19 12:46:00,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463241310] [2022-07-19 12:46:00,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:00,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:00,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:00,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:00,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-19 12:46:00,849 INFO L87 Difference]: Start difference. First operand 36574 states and 38329 transitions. Second operand has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:02,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:02,164 INFO L93 Difference]: Finished difference Result 82806 states and 87157 transitions. [2022-07-19 12:46:02,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:02,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1257 [2022-07-19 12:46:02,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:02,213 INFO L225 Difference]: With dead ends: 82806 [2022-07-19 12:46:02,214 INFO L226 Difference]: Without dead ends: 46234 [2022-07-19 12:46:02,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1265 GetRequests, 1257 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-19 12:46:02,241 INFO L413 NwaCegarLoop]: 967 mSDtfsCounter, 609 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:02,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 974 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1792 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 12:46:02,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46234 states. [2022-07-19 12:46:02,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46234 to 46234. [2022-07-19 12:46:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46234 states, 46233 states have (on average 1.0454653602405208) internal successors, (48335), 46233 states have internal predecessors, (48335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:02,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46234 states to 46234 states and 48335 transitions. [2022-07-19 12:46:02,615 INFO L78 Accepts]: Start accepts. Automaton has 46234 states and 48335 transitions. Word has length 1257 [2022-07-19 12:46:02,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:02,616 INFO L495 AbstractCegarLoop]: Abstraction has 46234 states and 48335 transitions. [2022-07-19 12:46:02,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:02,616 INFO L276 IsEmpty]: Start isEmpty. Operand 46234 states and 48335 transitions. [2022-07-19 12:46:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1277 [2022-07-19 12:46:02,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:02,633 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:02,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 12:46:02,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:46:02,851 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:02,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash 33998152, now seen corresponding path program 1 times [2022-07-19 12:46:02,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:02,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818970147] [2022-07-19 12:46:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:02,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:03,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:03,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 1198 proven. 0 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-07-19 12:46:03,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:03,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818970147] [2022-07-19 12:46:03,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818970147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:03,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:03,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:03,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059051258] [2022-07-19 12:46:03,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:03,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:03,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:03,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:03,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:03,569 INFO L87 Difference]: Start difference. First operand 46234 states and 48335 transitions. Second operand has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:05,214 INFO L93 Difference]: Finished difference Result 117306 states and 122973 transitions. [2022-07-19 12:46:05,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:05,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1276 [2022-07-19 12:46:05,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:05,289 INFO L225 Difference]: With dead ends: 117306 [2022-07-19 12:46:05,290 INFO L226 Difference]: Without dead ends: 71764 [2022-07-19 12:46:05,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:05,324 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 614 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1771 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:05,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 253 Invalid, 2027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1771 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:46:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71764 states. [2022-07-19 12:46:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71764 to 71074. [2022-07-19 12:46:05,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71074 states, 71073 states have (on average 1.0421679118652654) internal successors, (74070), 71073 states have internal predecessors, (74070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:06,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71074 states to 71074 states and 74070 transitions. [2022-07-19 12:46:06,215 INFO L78 Accepts]: Start accepts. Automaton has 71074 states and 74070 transitions. Word has length 1276 [2022-07-19 12:46:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:06,223 INFO L495 AbstractCegarLoop]: Abstraction has 71074 states and 74070 transitions. [2022-07-19 12:46:06,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:06,223 INFO L276 IsEmpty]: Start isEmpty. Operand 71074 states and 74070 transitions. [2022-07-19 12:46:06,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1371 [2022-07-19 12:46:06,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:06,251 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:06,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:46:06,251 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:06,252 INFO L85 PathProgramCache]: Analyzing trace with hash 106590780, now seen corresponding path program 1 times [2022-07-19 12:46:06,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:06,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918873671] [2022-07-19 12:46:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:06,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2111 backedges. 1434 proven. 0 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-07-19 12:46:06,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:06,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918873671] [2022-07-19 12:46:06,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918873671] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:06,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:06,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:06,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317460875] [2022-07-19 12:46:06,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:06,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:46:06,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:06,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:46:06,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:46:06,911 INFO L87 Difference]: Start difference. First operand 71074 states and 74070 transitions. Second operand has 4 states, 4 states have (on average 207.25) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:09,170 INFO L93 Difference]: Finished difference Result 149046 states and 155525 transitions. [2022-07-19 12:46:09,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:46:09,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1370 [2022-07-19 12:46:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:09,264 INFO L225 Difference]: With dead ends: 149046 [2022-07-19 12:46:09,264 INFO L226 Difference]: Without dead ends: 78664 [2022-07-19 12:46:09,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:46:09,306 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 792 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 792 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:09,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [792 Valid, 75 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 2734 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-19 12:46:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78664 states. [2022-07-19 12:46:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78664 to 78664. [2022-07-19 12:46:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78664 states, 78663 states have (on average 1.0408069867663323) internal successors, (81873), 78663 states have internal predecessors, (81873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:10,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78664 states to 78664 states and 81873 transitions. [2022-07-19 12:46:10,185 INFO L78 Accepts]: Start accepts. Automaton has 78664 states and 81873 transitions. Word has length 1370 [2022-07-19 12:46:10,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:10,186 INFO L495 AbstractCegarLoop]: Abstraction has 78664 states and 81873 transitions. [2022-07-19 12:46:10,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 207.25) internal successors, (829), 3 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:10,186 INFO L276 IsEmpty]: Start isEmpty. Operand 78664 states and 81873 transitions. [2022-07-19 12:46:10,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1418 [2022-07-19 12:46:10,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:10,206 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:10,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:46:10,206 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:10,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:10,206 INFO L85 PathProgramCache]: Analyzing trace with hash -867342427, now seen corresponding path program 1 times [2022-07-19 12:46:10,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:10,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464868713] [2022-07-19 12:46:10,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:10,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2613 backedges. 1167 proven. 1315 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-19 12:46:10,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464868713] [2022-07-19 12:46:10,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464868713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:46:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906394511] [2022-07-19 12:46:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:10,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:46:10,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:46:10,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:46:10,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 12:46:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:46:11,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:46:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2613 backedges. 1568 proven. 0 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-07-19 12:46:11,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:46:11,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906394511] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:11,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:46:11,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2022-07-19 12:46:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730065116] [2022-07-19 12:46:11,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:11,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:11,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-19 12:46:11,438 INFO L87 Difference]: Start difference. First operand 78664 states and 81873 transitions. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:13,264 INFO L93 Difference]: Finished difference Result 157326 states and 163744 transitions. [2022-07-19 12:46:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:13,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1417 [2022-07-19 12:46:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:13,351 INFO L225 Difference]: With dead ends: 157326 [2022-07-19 12:46:13,351 INFO L226 Difference]: Without dead ends: 78664 [2022-07-19 12:46:13,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1425 GetRequests, 1417 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-19 12:46:13,386 INFO L413 NwaCegarLoop]: 885 mSDtfsCounter, 617 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:13,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [617 Valid, 892 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:46:13,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78664 states. [2022-07-19 12:46:14,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78664 to 75904. [2022-07-19 12:46:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75904 states, 75903 states have (on average 1.0367179162878937) internal successors, (78690), 75903 states have internal predecessors, (78690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75904 states to 75904 states and 78690 transitions. [2022-07-19 12:46:14,238 INFO L78 Accepts]: Start accepts. Automaton has 75904 states and 78690 transitions. Word has length 1417 [2022-07-19 12:46:14,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:14,239 INFO L495 AbstractCegarLoop]: Abstraction has 75904 states and 78690 transitions. [2022-07-19 12:46:14,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 75904 states and 78690 transitions. [2022-07-19 12:46:14,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1532 [2022-07-19 12:46:14,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:14,264 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:14,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 12:46:14,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:46:14,476 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:14,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:14,476 INFO L85 PathProgramCache]: Analyzing trace with hash 17647821, now seen corresponding path program 1 times [2022-07-19 12:46:14,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:14,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091534517] [2022-07-19 12:46:14,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:14,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3026 backedges. 1948 proven. 0 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2022-07-19 12:46:15,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:15,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091534517] [2022-07-19 12:46:15,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091534517] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:15,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:15,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:15,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952038209] [2022-07-19 12:46:15,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:15,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:15,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:15,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:15,026 INFO L87 Difference]: Start difference. First operand 75904 states and 78690 transitions. Second operand has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:16,883 INFO L93 Difference]: Finished difference Result 162848 states and 168873 transitions. [2022-07-19 12:46:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1531 [2022-07-19 12:46:16,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:17,084 INFO L225 Difference]: With dead ends: 162848 [2022-07-19 12:46:17,084 INFO L226 Difference]: Without dead ends: 87636 [2022-07-19 12:46:17,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:17,122 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 518 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:17,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 271 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:46:17,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87636 states. [2022-07-19 12:46:17,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87636 to 84874. [2022-07-19 12:46:17,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84873 states have (on average 1.0358300048307472) internal successors, (87914), 84873 states have internal predecessors, (87914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 87914 transitions. [2022-07-19 12:46:18,112 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 87914 transitions. Word has length 1531 [2022-07-19 12:46:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:18,113 INFO L495 AbstractCegarLoop]: Abstraction has 84874 states and 87914 transitions. [2022-07-19 12:46:18,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:18,114 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 87914 transitions. [2022-07-19 12:46:18,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1559 [2022-07-19 12:46:18,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:18,165 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:18,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 12:46:18,166 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:18,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:18,167 INFO L85 PathProgramCache]: Analyzing trace with hash 816008112, now seen corresponding path program 1 times [2022-07-19 12:46:18,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:18,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056580812] [2022-07-19 12:46:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:18,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3047 backedges. 946 proven. 0 refuted. 0 times theorem prover too weak. 2101 trivial. 0 not checked. [2022-07-19 12:46:18,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056580812] [2022-07-19 12:46:18,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056580812] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:18,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:18,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:18,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889366736] [2022-07-19 12:46:18,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:18,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:18,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:18,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:18,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:18,919 INFO L87 Difference]: Start difference. First operand 84874 states and 87914 transitions. Second operand has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:20,924 INFO L93 Difference]: Finished difference Result 175956 states and 182405 transitions. [2022-07-19 12:46:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1558 [2022-07-19 12:46:20,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:21,012 INFO L225 Difference]: With dead ends: 175956 [2022-07-19 12:46:21,012 INFO L226 Difference]: Without dead ends: 91084 [2022-07-19 12:46:21,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:21,026 INFO L413 NwaCegarLoop]: 883 mSDtfsCounter, 578 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 890 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:21,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 890 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:46:21,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91084 states. [2022-07-19 12:46:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91084 to 89704. [2022-07-19 12:46:21,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89704 states, 89703 states have (on average 1.0304226168578532) internal successors, (92432), 89703 states have internal predecessors, (92432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89704 states to 89704 states and 92432 transitions. [2022-07-19 12:46:21,843 INFO L78 Accepts]: Start accepts. Automaton has 89704 states and 92432 transitions. Word has length 1558 [2022-07-19 12:46:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:21,844 INFO L495 AbstractCegarLoop]: Abstraction has 89704 states and 92432 transitions. [2022-07-19 12:46:21,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.33333333333334) internal successors, (691), 3 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 89704 states and 92432 transitions. [2022-07-19 12:46:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1740 [2022-07-19 12:46:21,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:21,880 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:21,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 12:46:21,880 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:21,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1961468620, now seen corresponding path program 1 times [2022-07-19 12:46:21,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:21,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144035179] [2022-07-19 12:46:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:21,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4065 backedges. 1104 proven. 0 refuted. 0 times theorem prover too weak. 2961 trivial. 0 not checked. [2022-07-19 12:46:22,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:22,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144035179] [2022-07-19 12:46:22,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144035179] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:22,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:22,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:22,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539588832] [2022-07-19 12:46:22,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:22,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:22,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:22,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:22,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:22,681 INFO L87 Difference]: Start difference. First operand 89704 states and 92432 transitions. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:24,487 INFO L93 Difference]: Finished difference Result 187686 states and 193472 transitions. [2022-07-19 12:46:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:24,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1739 [2022-07-19 12:46:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:24,611 INFO L225 Difference]: With dead ends: 187686 [2022-07-19 12:46:24,612 INFO L226 Difference]: Without dead ends: 98674 [2022-07-19 12:46:24,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:24,656 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 553 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:24,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [553 Valid, 274 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 12:46:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98674 states. [2022-07-19 12:46:25,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98674 to 89014. [2022-07-19 12:46:25,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89014 states, 89013 states have (on average 1.030321413726085) internal successors, (91712), 89013 states have internal predecessors, (91712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89014 states to 89014 states and 91712 transitions. [2022-07-19 12:46:25,830 INFO L78 Accepts]: Start accepts. Automaton has 89014 states and 91712 transitions. Word has length 1739 [2022-07-19 12:46:25,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:25,831 INFO L495 AbstractCegarLoop]: Abstraction has 89014 states and 91712 transitions. [2022-07-19 12:46:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 89014 states and 91712 transitions. [2022-07-19 12:46:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1757 [2022-07-19 12:46:26,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:26,119 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:26,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 12:46:26,119 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:26,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:26,120 INFO L85 PathProgramCache]: Analyzing trace with hash 288674508, now seen corresponding path program 1 times [2022-07-19 12:46:26,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:26,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696767599] [2022-07-19 12:46:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:26,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4019 backedges. 2403 proven. 0 refuted. 0 times theorem prover too weak. 1616 trivial. 0 not checked. [2022-07-19 12:46:26,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:26,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696767599] [2022-07-19 12:46:26,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696767599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:26,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:26,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 12:46:26,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456947391] [2022-07-19 12:46:26,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:26,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 12:46:26,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:26,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 12:46:26,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 12:46:26,616 INFO L87 Difference]: Start difference. First operand 89014 states and 91712 transitions. Second operand has 5 states, 5 states have (on average 193.4) internal successors, (967), 5 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:29,647 INFO L93 Difference]: Finished difference Result 178437 states and 183850 transitions. [2022-07-19 12:46:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 12:46:29,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 193.4) internal successors, (967), 5 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1756 [2022-07-19 12:46:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:29,735 INFO L225 Difference]: With dead ends: 178437 [2022-07-19 12:46:29,736 INFO L226 Difference]: Without dead ends: 90115 [2022-07-19 12:46:29,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 12:46:29,787 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 1585 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 5803 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 994 SdHoareTripleChecker+Invalid, 6210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 5803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:29,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1585 Valid, 994 Invalid, 6210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 5803 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:46:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90115 states. [2022-07-19 12:46:30,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90115 to 89704. [2022-07-19 12:46:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89704 states, 89703 states have (on average 1.0275018672731124) internal successors, (92170), 89703 states have internal predecessors, (92170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89704 states to 89704 states and 92170 transitions. [2022-07-19 12:46:31,198 INFO L78 Accepts]: Start accepts. Automaton has 89704 states and 92170 transitions. Word has length 1756 [2022-07-19 12:46:31,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:31,199 INFO L495 AbstractCegarLoop]: Abstraction has 89704 states and 92170 transitions. [2022-07-19 12:46:31,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 193.4) internal successors, (967), 5 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:31,200 INFO L276 IsEmpty]: Start isEmpty. Operand 89704 states and 92170 transitions. [2022-07-19 12:46:31,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1758 [2022-07-19 12:46:31,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:31,241 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:31,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 12:46:31,241 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:31,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1138805750, now seen corresponding path program 1 times [2022-07-19 12:46:31,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:31,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100193206] [2022-07-19 12:46:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3651 backedges. 990 proven. 0 refuted. 0 times theorem prover too weak. 2661 trivial. 0 not checked. [2022-07-19 12:46:31,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:31,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100193206] [2022-07-19 12:46:31,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100193206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:31,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:31,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:31,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730059318] [2022-07-19 12:46:31,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:31,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:31,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:31,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:31,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:31,724 INFO L87 Difference]: Start difference. First operand 89704 states and 92170 transitions. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:33,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:33,560 INFO L93 Difference]: Finished difference Result 182166 states and 187121 transitions. [2022-07-19 12:46:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:33,560 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1757 [2022-07-19 12:46:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:33,658 INFO L225 Difference]: With dead ends: 182166 [2022-07-19 12:46:33,658 INFO L226 Difference]: Without dead ends: 89704 [2022-07-19 12:46:33,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:33,708 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 555 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:33,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 933 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 12:46:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89704 states. [2022-07-19 12:46:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89704 to 89014. [2022-07-19 12:46:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89014 states, 89013 states have (on average 1.020221765360116) internal successors, (90813), 89013 states have internal predecessors, (90813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:34,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89014 states to 89014 states and 90813 transitions. [2022-07-19 12:46:34,733 INFO L78 Accepts]: Start accepts. Automaton has 89014 states and 90813 transitions. Word has length 1757 [2022-07-19 12:46:34,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:34,734 INFO L495 AbstractCegarLoop]: Abstraction has 89014 states and 90813 transitions. [2022-07-19 12:46:34,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 89014 states and 90813 transitions. [2022-07-19 12:46:34,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1761 [2022-07-19 12:46:34,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:34,775 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:34,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 12:46:34,775 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:34,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:34,776 INFO L85 PathProgramCache]: Analyzing trace with hash 275883314, now seen corresponding path program 1 times [2022-07-19 12:46:34,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:34,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545904525] [2022-07-19 12:46:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:34,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3694 backedges. 1878 proven. 0 refuted. 0 times theorem prover too weak. 1816 trivial. 0 not checked. [2022-07-19 12:46:35,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:35,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545904525] [2022-07-19 12:46:35,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545904525] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:35,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:35,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:35,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820666199] [2022-07-19 12:46:35,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:35,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:35,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:35,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:35,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:35,609 INFO L87 Difference]: Start difference. First operand 89014 states and 90813 transitions. Second operand has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:37,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:37,637 INFO L93 Difference]: Finished difference Result 176646 states and 180203 transitions. [2022-07-19 12:46:37,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:37,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1760 [2022-07-19 12:46:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:37,734 INFO L225 Difference]: With dead ends: 176646 [2022-07-19 12:46:37,734 INFO L226 Difference]: Without dead ends: 87634 [2022-07-19 12:46:37,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:37,773 INFO L413 NwaCegarLoop]: 830 mSDtfsCounter, 497 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 1951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:37,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [497 Valid, 837 Invalid, 1951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:46:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87634 states. [2022-07-19 12:46:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87634 to 85564. [2022-07-19 12:46:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85564 states, 85563 states have (on average 1.0185126748711475) internal successors, (87147), 85563 states have internal predecessors, (87147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85564 states to 85564 states and 87147 transitions. [2022-07-19 12:46:38,686 INFO L78 Accepts]: Start accepts. Automaton has 85564 states and 87147 transitions. Word has length 1760 [2022-07-19 12:46:38,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:38,687 INFO L495 AbstractCegarLoop]: Abstraction has 85564 states and 87147 transitions. [2022-07-19 12:46:38,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 299.6666666666667) internal successors, (899), 3 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:38,688 INFO L276 IsEmpty]: Start isEmpty. Operand 85564 states and 87147 transitions. [2022-07-19 12:46:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1823 [2022-07-19 12:46:38,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:38,729 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:38,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 12:46:38,729 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:38,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1036524502, now seen corresponding path program 1 times [2022-07-19 12:46:38,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:38,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536051057] [2022-07-19 12:46:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:38,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:39,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4092 backedges. 1701 proven. 1702 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2022-07-19 12:46:39,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536051057] [2022-07-19 12:46:39,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536051057] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:46:39,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655955505] [2022-07-19 12:46:39,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:39,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:46:39,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:46:39,720 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:46:39,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 12:46:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:40,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:46:40,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:46:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4092 backedges. 1740 proven. 0 refuted. 0 times theorem prover too weak. 2352 trivial. 0 not checked. [2022-07-19 12:46:40,186 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:46:40,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655955505] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:40,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:46:40,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-19 12:46:40,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667501026] [2022-07-19 12:46:40,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:40,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:40,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:40,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:40,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:46:40,188 INFO L87 Difference]: Start difference. First operand 85564 states and 87147 transitions. Second operand has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:42,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:42,080 INFO L93 Difference]: Finished difference Result 170436 states and 173601 transitions. [2022-07-19 12:46:42,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:42,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1822 [2022-07-19 12:46:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:42,173 INFO L225 Difference]: With dead ends: 170436 [2022-07-19 12:46:42,174 INFO L226 Difference]: Without dead ends: 85564 [2022-07-19 12:46:42,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1828 GetRequests, 1822 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:46:42,209 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 640 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 640 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:42,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [640 Valid, 885 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 12:46:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85564 states. [2022-07-19 12:46:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85564 to 84874. [2022-07-19 12:46:43,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84874 states, 84873 states have (on average 1.0141034251175285) internal successors, (86070), 84873 states have internal predecessors, (86070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:43,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84874 states to 84874 states and 86070 transitions. [2022-07-19 12:46:43,306 INFO L78 Accepts]: Start accepts. Automaton has 84874 states and 86070 transitions. Word has length 1822 [2022-07-19 12:46:43,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:43,307 INFO L495 AbstractCegarLoop]: Abstraction has 84874 states and 86070 transitions. [2022-07-19 12:46:43,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.6666666666667) internal successors, (785), 3 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:43,307 INFO L276 IsEmpty]: Start isEmpty. Operand 84874 states and 86070 transitions. [2022-07-19 12:46:43,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1846 [2022-07-19 12:46:43,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:43,351 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:43,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 12:46:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 12:46:43,566 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash 424358867, now seen corresponding path program 1 times [2022-07-19 12:46:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:43,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27925741] [2022-07-19 12:46:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:43,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:44,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4423 backedges. 2667 proven. 0 refuted. 0 times theorem prover too weak. 1756 trivial. 0 not checked. [2022-07-19 12:46:44,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:44,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27925741] [2022-07-19 12:46:44,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27925741] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:44,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:46:44,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:46:44,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062023835] [2022-07-19 12:46:44,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:44,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:46:44,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:44,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:46:44,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:44,215 INFO L87 Difference]: Start difference. First operand 84874 states and 86070 transitions. Second operand has 3 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:45,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:45,953 INFO L93 Difference]: Finished difference Result 169056 states and 171447 transitions. [2022-07-19 12:46:45,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:46:45,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1845 [2022-07-19 12:46:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:46,040 INFO L225 Difference]: With dead ends: 169056 [2022-07-19 12:46:46,041 INFO L226 Difference]: Without dead ends: 84874 [2022-07-19 12:46:46,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:46:46,091 INFO L413 NwaCegarLoop]: 914 mSDtfsCounter, 435 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1650 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:46,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 921 Invalid, 1754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1650 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-19 12:46:46,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84874 states. [2022-07-19 12:46:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84874 to 82804. [2022-07-19 12:46:46,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82804 states, 82803 states have (on average 1.0121613951185344) internal successors, (83810), 82803 states have internal predecessors, (83810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:46,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82804 states to 82804 states and 83810 transitions. [2022-07-19 12:46:46,997 INFO L78 Accepts]: Start accepts. Automaton has 82804 states and 83810 transitions. Word has length 1845 [2022-07-19 12:46:46,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:46:46,998 INFO L495 AbstractCegarLoop]: Abstraction has 82804 states and 83810 transitions. [2022-07-19 12:46:46,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.6666666666667) internal successors, (941), 3 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 82804 states and 83810 transitions. [2022-07-19 12:46:47,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1930 [2022-07-19 12:46:47,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:46:47,051 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:46:47,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-19 12:46:47,051 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:46:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:46:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1559665092, now seen corresponding path program 1 times [2022-07-19 12:46:47,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:46:47,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185734815] [2022-07-19 12:46:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:47,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:46:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:47,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 2989 proven. 448 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2022-07-19 12:46:47,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:46:47,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185734815] [2022-07-19 12:46:47,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185734815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:46:47,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052432486] [2022-07-19 12:46:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:46:47,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:46:47,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:46:47,929 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:46:47,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 12:46:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:46:48,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 2198 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 12:46:48,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:46:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4012 backedges. 2218 proven. 0 refuted. 0 times theorem prover too weak. 1794 trivial. 0 not checked. [2022-07-19 12:46:58,159 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:46:58,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052432486] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:46:58,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:46:58,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-19 12:46:58,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450223970] [2022-07-19 12:46:58,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:46:58,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:46:58,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:46:58,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:46:58,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:46:58,162 INFO L87 Difference]: Start difference. First operand 82804 states and 83810 transitions. Second operand has 4 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:46:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:46:59,537 INFO L93 Difference]: Finished difference Result 93156 states and 94250 transitions. [2022-07-19 12:46:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:46:59,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1929 [2022-07-19 12:46:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:46:59,619 INFO L225 Difference]: With dead ends: 93156 [2022-07-19 12:46:59,619 INFO L226 Difference]: Without dead ends: 92464 [2022-07-19 12:46:59,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1934 GetRequests, 1784 SyntacticMatches, 144 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-19 12:46:59,642 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 946 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 4042 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2130 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:46:59,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 117 Invalid, 4042 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1675 Invalid, 0 Unknown, 2130 Unchecked, 1.1s Time] [2022-07-19 12:46:59,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92464 states. [2022-07-19 12:47:00,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92464 to 84184. [2022-07-19 12:47:00,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84184 states, 84183 states have (on average 1.0121877338655072) internal successors, (85209), 84183 states have internal predecessors, (85209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:47:00,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84184 states to 84184 states and 85209 transitions. [2022-07-19 12:47:00,677 INFO L78 Accepts]: Start accepts. Automaton has 84184 states and 85209 transitions. Word has length 1929 [2022-07-19 12:47:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:47:00,678 INFO L495 AbstractCegarLoop]: Abstraction has 84184 states and 85209 transitions. [2022-07-19 12:47:00,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.25) internal successors, (1033), 4 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:47:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 84184 states and 85209 transitions. [2022-07-19 12:47:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1983 [2022-07-19 12:47:00,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:47:00,732 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:47:00,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 12:47:00,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 12:47:00,954 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:47:00,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:47:00,954 INFO L85 PathProgramCache]: Analyzing trace with hash -395212537, now seen corresponding path program 1 times [2022-07-19 12:47:00,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:47:00,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870845203] [2022-07-19 12:47:00,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:47:00,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:47:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:47:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4120 backedges. 2837 proven. 581 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2022-07-19 12:47:01,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:47:01,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870845203] [2022-07-19 12:47:01,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870845203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:47:01,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641851396] [2022-07-19 12:47:01,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:47:01,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:47:01,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:47:01,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:47:01,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 12:47:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:47:02,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 2249 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 12:47:02,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:47:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4120 backedges. 2843 proven. 0 refuted. 0 times theorem prover too weak. 1277 trivial. 0 not checked. [2022-07-19 12:47:03,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:47:03,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641851396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:47:03,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:47:03,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-07-19 12:47:03,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407563109] [2022-07-19 12:47:03,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:47:03,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:47:03,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:47:03,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:47:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 12:47:03,196 INFO L87 Difference]: Start difference. First operand 84184 states and 85209 transitions. Second operand has 4 states, 4 states have (on average 260.0) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:47:05,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:47:05,439 INFO L93 Difference]: Finished difference Result 180786 states and 183040 transitions. [2022-07-19 12:47:05,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:47:05,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 260.0) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1982 [2022-07-19 12:47:05,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:47:05,535 INFO L225 Difference]: With dead ends: 180786 [2022-07-19 12:47:05,536 INFO L226 Difference]: Without dead ends: 97294 [2022-07-19 12:47:05,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1989 GetRequests, 1980 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-19 12:47:05,574 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 784 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3309 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 784 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 3600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 3309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:47:05,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [784 Valid, 84 Invalid, 3600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 3309 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 12:47:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97294 states. [2022-07-19 12:47:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97294 to 93154. [2022-07-19 12:47:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93154 states, 93153 states have (on average 1.0121627859542903) internal successors, (94286), 93153 states have internal predecessors, (94286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:47:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93154 states to 93154 states and 94286 transitions. [2022-07-19 12:47:06,587 INFO L78 Accepts]: Start accepts. Automaton has 93154 states and 94286 transitions. Word has length 1982 [2022-07-19 12:47:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:47:06,589 INFO L495 AbstractCegarLoop]: Abstraction has 93154 states and 94286 transitions. [2022-07-19 12:47:06,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 260.0) internal successors, (1040), 3 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:47:06,589 INFO L276 IsEmpty]: Start isEmpty. Operand 93154 states and 94286 transitions. [2022-07-19 12:47:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1984 [2022-07-19 12:47:06,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:47:06,647 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:47:06,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 12:47:06,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 12:47:06,863 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:47:06,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:47:06,864 INFO L85 PathProgramCache]: Analyzing trace with hash -848356536, now seen corresponding path program 1 times [2022-07-19 12:47:06,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:47:06,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329112524] [2022-07-19 12:47:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:47:06,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:47:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat