./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label19.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/Problem19_label19.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 497507965304fa3958b4d8590ba6d10980c500d31bff8080fc78d47954487eca --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:09:20,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:09:20,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:09:20,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:09:20,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:09:20,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:09:20,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:09:20,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:09:20,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:09:20,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:09:20,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:09:20,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:09:20,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:09:20,900 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:09:20,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:09:20,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:09:20,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:09:20,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:09:20,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:09:20,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:09:20,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:09:20,925 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:09:20,926 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:09:20,927 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:09:20,934 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:09:20,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:09:20,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:09:20,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:09:20,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:09:20,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:09:20,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:09:20,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:09:20,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:09:20,941 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:09:20,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:09:20,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:09:20,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:09:20,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:09:20,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:09:20,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:09:20,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:09:20,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:09:20,973 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:09:20,974 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:09:20,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:09:20,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:09:20,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:09:20,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:09:20,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:09:20,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:09:20,976 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:09:20,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:09:20,977 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:09:20,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:09:20,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:09:20,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:09:20,978 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:09:20,978 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:09:20,978 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:09:20,978 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:09:20,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:09:20,979 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:09:20,979 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:09:20,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:09:20,979 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:09:20,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:09:20,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:09:20,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:09:20,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:09:20,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:09:20,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:09:20,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:09:20,982 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:09:20,982 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:09:20,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:09:20,982 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:09:20,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497507965304fa3958b4d8590ba6d10980c500d31bff8080fc78d47954487eca [2021-12-15 23:09:21,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:09:21,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:09:21,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:09:21,219 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:09:21,219 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:09:21,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label19.c [2021-12-15 23:09:21,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44047c135/6c0163a7d5dd4d32879178a4e6859ffa/FLAGbeafeb931 [2021-12-15 23:09:21,888 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:09:21,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label19.c [2021-12-15 23:09:21,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44047c135/6c0163a7d5dd4d32879178a4e6859ffa/FLAGbeafeb931 [2021-12-15 23:09:22,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44047c135/6c0163a7d5dd4d32879178a4e6859ffa [2021-12-15 23:09:22,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:09:22,011 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:09:22,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:09:22,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:09:22,016 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:09:22,016 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:09:22" (1/1) ... [2021-12-15 23:09:22,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12d81c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:22, skipping insertion in model container [2021-12-15 23:09:22,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:09:22" (1/1) ... [2021-12-15 23:09:22,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:09:22,219 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:09:22,512 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/Problem19_label19.c[3491,3504] [2021-12-15 23:09:23,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:09:23,424 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:09:23,441 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/Problem19_label19.c[3491,3504] [2021-12-15 23:09:23,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:09:23,943 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:09:23,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23 WrapperNode [2021-12-15 23:09:23,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:09:23,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:09:23,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:09:23,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:09:23,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:24,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:24,660 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-15 23:09:24,661 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:09:24,662 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:09:24,662 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:09:24,662 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:09:24,667 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:24,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:24,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:24,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:25,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:25,207 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:25,256 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:25,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:09:25,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:09:25,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:09:25,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:09:25,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (1/1) ... [2021-12-15 23:09:25,455 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:09:25,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:09:25,492 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) [2021-12-15 23:09:25,498 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 [2021-12-15 23:09:25,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:09:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:09:25,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:09:25,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:09:25,621 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:09:25,622 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:09:31,053 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:09:31,075 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:09:31,076 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:09:31,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:09:31 BoogieIcfgContainer [2021-12-15 23:09:31,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:09:31,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:09:31,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:09:31,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:09:31,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:09:22" (1/3) ... [2021-12-15 23:09:31,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b42528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:09:31, skipping insertion in model container [2021-12-15 23:09:31,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:09:23" (2/3) ... [2021-12-15 23:09:31,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16b42528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:09:31, skipping insertion in model container [2021-12-15 23:09:31,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:09:31" (3/3) ... [2021-12-15 23:09:31,086 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label19.c [2021-12-15 23:09:31,089 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:09:31,089 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:09:31,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:09:31,128 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 23:09:31,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:09:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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) [2021-12-15 23:09:31,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-15 23:09:31,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:09:31,157 INFO L514 BasicCegarLoop]: 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] [2021-12-15 23:09:31,158 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:09:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:09:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2021-12-15 23:09:31,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:09:31,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519068249] [2021-12-15 23:09:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:31,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:09:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:09:31,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:09:31,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519068249] [2021-12-15 23:09:31,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519068249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:09:31,282 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:09:31,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:09:31,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79807487] [2021-12-15 23:09:31,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:09:31,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:09:31,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:09:31,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:09:31,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:09:31,308 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2021-12-15 23:09:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:09:37,477 INFO L93 Difference]: Finished difference Result 4975 states and 9416 transitions. [2021-12-15 23:09:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:09:37,479 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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 24 [2021-12-15 23:09:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:09:37,546 INFO L225 Difference]: With dead ends: 4975 [2021-12-15 23:09:37,546 INFO L226 Difference]: Without dead ends: 3163 [2021-12-15 23:09:37,561 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:09:37,564 INFO L933 BasicCegarLoop]: 1353 mSDtfsCounter, 1522 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 4670 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1522 SdHoareTripleChecker+Valid, 1524 SdHoareTripleChecker+Invalid, 5793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 4670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:09:37,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1522 Valid, 1524 Invalid, 5793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 4670 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-12-15 23:09:37,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3163 states. [2021-12-15 23:09:37,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3163 to 3123. [2021-12-15 23:09:37,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3123 states, 3122 states have (on average 1.6268417680973735) internal successors, (5079), 3122 states have internal predecessors, (5079), 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) [2021-12-15 23:09:37,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3123 states to 3123 states and 5079 transitions. [2021-12-15 23:09:37,673 INFO L78 Accepts]: Start accepts. Automaton has 3123 states and 5079 transitions. Word has length 24 [2021-12-15 23:09:37,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:09:37,673 INFO L470 AbstractCegarLoop]: Abstraction has 3123 states and 5079 transitions. [2021-12-15 23:09:37,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2021-12-15 23:09:37,674 INFO L276 IsEmpty]: Start isEmpty. Operand 3123 states and 5079 transitions. [2021-12-15 23:09:37,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-15 23:09:37,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:09:37,678 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 23:09:37,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:09:37,679 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:09:37,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:09:37,682 INFO L85 PathProgramCache]: Analyzing trace with hash 792084509, now seen corresponding path program 1 times [2021-12-15 23:09:37,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:09:37,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942444990] [2021-12-15 23:09:37,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:37,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:09:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:09:37,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:09:37,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942444990] [2021-12-15 23:09:37,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942444990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:09:37,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:09:37,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:09:37,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056135560] [2021-12-15 23:09:37,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:09:37,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:09:37,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:09:37,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:09:37,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:09:37,839 INFO L87 Difference]: Start difference. First operand 3123 states and 5079 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 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) [2021-12-15 23:09:43,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:09:43,413 INFO L93 Difference]: Finished difference Result 9175 states and 14984 transitions. [2021-12-15 23:09:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:09:43,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 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 [2021-12-15 23:09:43,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:09:43,430 INFO L225 Difference]: With dead ends: 9175 [2021-12-15 23:09:43,431 INFO L226 Difference]: Without dead ends: 6054 [2021-12-15 23:09:43,434 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:09:43,435 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1776 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4196 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1776 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 5626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:09:43,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1776 Valid, 1617 Invalid, 5626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4196 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-15 23:09:43,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6054 states. [2021-12-15 23:09:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6054 to 6040. [2021-12-15 23:09:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6040 states, 6039 states have (on average 1.4207650273224044) internal successors, (8580), 6039 states have internal predecessors, (8580), 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) [2021-12-15 23:09:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6040 states to 6040 states and 8580 transitions. [2021-12-15 23:09:43,511 INFO L78 Accepts]: Start accepts. Automaton has 6040 states and 8580 transitions. Word has length 95 [2021-12-15 23:09:43,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:09:43,511 INFO L470 AbstractCegarLoop]: Abstraction has 6040 states and 8580 transitions. [2021-12-15 23:09:43,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 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) [2021-12-15 23:09:43,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6040 states and 8580 transitions. [2021-12-15 23:09:43,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-15 23:09:43,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:09:43,514 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 23:09:43,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:09:43,514 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:09:43,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:09:43,515 INFO L85 PathProgramCache]: Analyzing trace with hash -594542770, now seen corresponding path program 1 times [2021-12-15 23:09:43,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:09:43,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578388010] [2021-12-15 23:09:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:43,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:09:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:09:43,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:09:43,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578388010] [2021-12-15 23:09:43,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578388010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:09:43,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:09:43,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:09:43,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725147905] [2021-12-15 23:09:43,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:09:43,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:09:43,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:09:43,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:09:43,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:09:43,658 INFO L87 Difference]: Start difference. First operand 6040 states and 8580 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-15 23:09:52,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:09:52,628 INFO L93 Difference]: Finished difference Result 20362 states and 28348 transitions. [2021-12-15 23:09:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:09:52,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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 106 [2021-12-15 23:09:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:09:52,666 INFO L225 Difference]: With dead ends: 20362 [2021-12-15 23:09:52,667 INFO L226 Difference]: Without dead ends: 14324 [2021-12-15 23:09:52,678 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:09:52,679 INFO L933 BasicCegarLoop]: 1813 mSDtfsCounter, 4030 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 9663 mSolverCounterSat, 1294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4030 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 10957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1294 IncrementalHoareTripleChecker+Valid, 9663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-15 23:09:52,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4030 Valid, 2176 Invalid, 10957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1294 Valid, 9663 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-12-15 23:09:52,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14324 states. [2021-12-15 23:09:52,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14324 to 14285. [2021-12-15 23:09:52,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14285 states, 14284 states have (on average 1.2219266311957435) internal successors, (17454), 14284 states have internal predecessors, (17454), 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) [2021-12-15 23:09:52,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14285 states to 14285 states and 17454 transitions. [2021-12-15 23:09:52,895 INFO L78 Accepts]: Start accepts. Automaton has 14285 states and 17454 transitions. Word has length 106 [2021-12-15 23:09:52,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:09:52,895 INFO L470 AbstractCegarLoop]: Abstraction has 14285 states and 17454 transitions. [2021-12-15 23:09:52,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 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) [2021-12-15 23:09:52,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14285 states and 17454 transitions. [2021-12-15 23:09:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-15 23:09:52,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:09:52,903 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 23:09:52,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:09:52,903 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:09:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:09:52,904 INFO L85 PathProgramCache]: Analyzing trace with hash -366703381, now seen corresponding path program 1 times [2021-12-15 23:09:52,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:09:52,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682548660] [2021-12-15 23:09:52,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:52,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:09:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:09:53,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:09:53,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682548660] [2021-12-15 23:09:53,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682548660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:09:53,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:09:53,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:09:53,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691635187] [2021-12-15 23:09:53,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:09:53,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:09:53,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:09:53,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:09:53,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:09:53,053 INFO L87 Difference]: Start difference. First operand 14285 states and 17454 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-12-15 23:09:58,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:09:58,370 INFO L93 Difference]: Finished difference Result 35426 states and 44630 transitions. [2021-12-15 23:09:58,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:09:58,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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 259 [2021-12-15 23:09:58,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:09:58,431 INFO L225 Difference]: With dead ends: 35426 [2021-12-15 23:09:58,431 INFO L226 Difference]: Without dead ends: 23873 [2021-12-15 23:09:58,444 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:09:58,445 INFO L933 BasicCegarLoop]: 3099 mSDtfsCounter, 1455 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3735 mSolverCounterSat, 1895 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1455 SdHoareTripleChecker+Valid, 3291 SdHoareTripleChecker+Invalid, 5630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1895 IncrementalHoareTripleChecker+Valid, 3735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:09:58,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1455 Valid, 3291 Invalid, 5630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1895 Valid, 3735 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-15 23:09:58,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23873 states. [2021-12-15 23:09:58,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23873 to 23869. [2021-12-15 23:09:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23869 states, 23868 states have (on average 1.1554382436735378) internal successors, (27578), 23868 states have internal predecessors, (27578), 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) [2021-12-15 23:09:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23869 states to 23869 states and 27578 transitions. [2021-12-15 23:09:58,714 INFO L78 Accepts]: Start accepts. Automaton has 23869 states and 27578 transitions. Word has length 259 [2021-12-15 23:09:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:09:58,715 INFO L470 AbstractCegarLoop]: Abstraction has 23869 states and 27578 transitions. [2021-12-15 23:09:58,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-12-15 23:09:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 23869 states and 27578 transitions. [2021-12-15 23:09:58,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-12-15 23:09:58,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:09:58,719 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:09:58,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:09:58,719 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:09:58,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:09:58,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1290046617, now seen corresponding path program 1 times [2021-12-15 23:09:58,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:09:58,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579380145] [2021-12-15 23:09:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:09:58,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:09:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:09:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 110 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:09:58,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:09:58,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579380145] [2021-12-15 23:09:58,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579380145] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:09:58,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:09:58,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:09:58,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047838462] [2021-12-15 23:09:58,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:09:58,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:09:58,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:09:58,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:09:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:09:58,939 INFO L87 Difference]: Start difference. First operand 23869 states and 27578 transitions. Second operand has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 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) [2021-12-15 23:10:04,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:10:04,446 INFO L93 Difference]: Finished difference Result 45037 states and 52437 transitions. [2021-12-15 23:10:04,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:10:04,447 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 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 327 [2021-12-15 23:10:04,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:10:04,481 INFO L225 Difference]: With dead ends: 45037 [2021-12-15 23:10:04,482 INFO L226 Difference]: Without dead ends: 23869 [2021-12-15 23:10:04,502 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:10:04,503 INFO L933 BasicCegarLoop]: 1773 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5713 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1952 SdHoareTripleChecker+Invalid, 5721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:10:04,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1952 Invalid, 5721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5713 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-15 23:10:04,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23869 states. [2021-12-15 23:10:04,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23869 to 23869. [2021-12-15 23:10:04,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23869 states, 23868 states have (on average 1.1548935813641696) internal successors, (27565), 23868 states have internal predecessors, (27565), 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) [2021-12-15 23:10:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23869 states to 23869 states and 27565 transitions. [2021-12-15 23:10:04,761 INFO L78 Accepts]: Start accepts. Automaton has 23869 states and 27565 transitions. Word has length 327 [2021-12-15 23:10:04,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:10:04,761 INFO L470 AbstractCegarLoop]: Abstraction has 23869 states and 27565 transitions. [2021-12-15 23:10:04,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.75) internal successors, (327), 3 states have internal predecessors, (327), 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) [2021-12-15 23:10:04,762 INFO L276 IsEmpty]: Start isEmpty. Operand 23869 states and 27565 transitions. [2021-12-15 23:10:04,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2021-12-15 23:10:04,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:10:04,768 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:10:04,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 23:10:04,769 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:10:04,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:10:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1818554780, now seen corresponding path program 1 times [2021-12-15 23:10:04,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:10:04,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892111418] [2021-12-15 23:10:04,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:10:04,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:10:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:10:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:10:04,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:10:04,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892111418] [2021-12-15 23:10:04,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892111418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:10:04,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872539624] [2021-12-15 23:10:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:10:04,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:10:04,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:10:04,997 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) [2021-12-15 23:10:05,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 23:10:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:10:05,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:10:05,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:10:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 23:10:06,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:10:06,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872539624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:10:06,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:10:06,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 23:10:06,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240863874] [2021-12-15 23:10:06,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:10:06,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:10:06,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:10:06,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:10:06,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:10:06,076 INFO L87 Difference]: Start difference. First operand 23869 states and 27565 transitions. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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) [2021-12-15 23:10:12,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:10:12,212 INFO L93 Difference]: Finished difference Result 55945 states and 66251 transitions. [2021-12-15 23:10:12,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:10:12,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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 511 [2021-12-15 23:10:12,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:10:12,257 INFO L225 Difference]: With dead ends: 55945 [2021-12-15 23:10:12,257 INFO L226 Difference]: Without dead ends: 34808 [2021-12-15 23:10:12,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 510 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:10:12,284 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 1006 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 4885 mSolverCounterSat, 1026 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1771 SdHoareTripleChecker+Invalid, 5911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1026 IncrementalHoareTripleChecker+Valid, 4885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-15 23:10:12,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 1771 Invalid, 5911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1026 Valid, 4885 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-15 23:10:12,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34808 states. [2021-12-15 23:10:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34808 to 34805. [2021-12-15 23:10:12,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34805 states, 34804 states have (on average 1.1441500976899206) internal successors, (39821), 34804 states have internal predecessors, (39821), 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) [2021-12-15 23:10:12,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34805 states to 34805 states and 39821 transitions. [2021-12-15 23:10:12,606 INFO L78 Accepts]: Start accepts. Automaton has 34805 states and 39821 transitions. Word has length 511 [2021-12-15 23:10:12,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:10:12,607 INFO L470 AbstractCegarLoop]: Abstraction has 34805 states and 39821 transitions. [2021-12-15 23:10:12,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 2 states have internal predecessors, (491), 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) [2021-12-15 23:10:12,607 INFO L276 IsEmpty]: Start isEmpty. Operand 34805 states and 39821 transitions. [2021-12-15 23:10:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2021-12-15 23:10:12,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:10:12,611 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:10:12,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 23:10:12,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 23:10:12,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:10:12,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:10:12,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1094817382, now seen corresponding path program 1 times [2021-12-15 23:10:12,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:10:12,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238892507] [2021-12-15 23:10:12,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:10:12,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:10:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:10:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-15 23:10:13,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:10:13,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238892507] [2021-12-15 23:10:13,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238892507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:10:13,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:10:13,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:10:13,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716856350] [2021-12-15 23:10:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:10:13,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:10:13,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:10:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:10:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:10:13,027 INFO L87 Difference]: Start difference. First operand 34805 states and 39821 transitions. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 2 states have internal predecessors, (513), 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) [2021-12-15 23:10:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:10:17,730 INFO L93 Difference]: Finished difference Result 76442 states and 87780 transitions. [2021-12-15 23:10:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:10:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 2 states have internal predecessors, (513), 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 596 [2021-12-15 23:10:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:10:17,794 INFO L225 Difference]: With dead ends: 76442 [2021-12-15 23:10:17,794 INFO L226 Difference]: Without dead ends: 44369 [2021-12-15 23:10:17,818 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:10:17,820 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 1386 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1668 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1386 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 5593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1668 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-15 23:10:17,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1386 Valid, 751 Invalid, 5593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1668 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-12-15 23:10:17,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44369 states. [2021-12-15 23:10:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44369 to 44361. [2021-12-15 23:10:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44361 states, 44360 states have (on average 1.118575293056808) internal successors, (49620), 44360 states have internal predecessors, (49620), 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) [2021-12-15 23:10:18,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44361 states to 44361 states and 49620 transitions. [2021-12-15 23:10:18,181 INFO L78 Accepts]: Start accepts. Automaton has 44361 states and 49620 transitions. Word has length 596 [2021-12-15 23:10:18,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:10:18,182 INFO L470 AbstractCegarLoop]: Abstraction has 44361 states and 49620 transitions. [2021-12-15 23:10:18,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.0) internal successors, (513), 2 states have internal predecessors, (513), 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) [2021-12-15 23:10:18,182 INFO L276 IsEmpty]: Start isEmpty. Operand 44361 states and 49620 transitions. [2021-12-15 23:10:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2021-12-15 23:10:18,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:10:18,187 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:10:18,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 23:10:18,187 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:10:18,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:10:18,188 INFO L85 PathProgramCache]: Analyzing trace with hash -940574170, now seen corresponding path program 1 times [2021-12-15 23:10:18,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:10:18,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147381787] [2021-12-15 23:10:18,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:10:18,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:10:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:10:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-15 23:10:18,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:10:18,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147381787] [2021-12-15 23:10:18,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147381787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:10:18,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:10:18,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:10:18,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127247374] [2021-12-15 23:10:18,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:10:18,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:10:18,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:10:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:10:18,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:10:18,358 INFO L87 Difference]: Start difference. First operand 44361 states and 49620 transitions. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 2 states have internal predecessors, (515), 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) [2021-12-15 23:10:24,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:10:24,101 INFO L93 Difference]: Finished difference Result 124413 states and 140004 transitions. [2021-12-15 23:10:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:10:24,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 2 states have internal predecessors, (515), 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 630 [2021-12-15 23:10:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:10:24,189 INFO L225 Difference]: With dead ends: 124413 [2021-12-15 23:10:24,189 INFO L226 Difference]: Without dead ends: 81417 [2021-12-15 23:10:24,229 INFO L932 BasicCegarLoop]: 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 [2021-12-15 23:10:24,230 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 2109 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 5111 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2109 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 5545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-15 23:10:24,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2109 Valid, 978 Invalid, 5545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5111 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-15 23:10:24,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81417 states. [2021-12-15 23:10:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81417 to 78684. [2021-12-15 23:10:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78684 states, 78683 states have (on average 1.1110150858508192) internal successors, (87418), 78683 states have internal predecessors, (87418), 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) [2021-12-15 23:10:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78684 states to 78684 states and 87418 transitions. [2021-12-15 23:10:24,897 INFO L78 Accepts]: Start accepts. Automaton has 78684 states and 87418 transitions. Word has length 630 [2021-12-15 23:10:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:10:24,898 INFO L470 AbstractCegarLoop]: Abstraction has 78684 states and 87418 transitions. [2021-12-15 23:10:24,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 2 states have internal predecessors, (515), 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) [2021-12-15 23:10:24,899 INFO L276 IsEmpty]: Start isEmpty. Operand 78684 states and 87418 transitions. [2021-12-15 23:10:24,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 731 [2021-12-15 23:10:24,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:10:24,903 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:10:24,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 23:10:24,904 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:10:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:10:24,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1054223041, now seen corresponding path program 1 times [2021-12-15 23:10:24,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:10:24,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123674678] [2021-12-15 23:10:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:10:24,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:10:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:10:25,212 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 65 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:10:25,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:10:25,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123674678] [2021-12-15 23:10:25,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123674678] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 23:10:25,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76666074] [2021-12-15 23:10:25,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:10:25,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 23:10:25,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:10:25,232 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) [2021-12-15 23:10:25,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 23:10:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:10:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 23:10:25,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:10:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2021-12-15 23:10:26,334 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:10:26,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76666074] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:10:26,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 23:10:26,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-15 23:10:26,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123083213] [2021-12-15 23:10:26,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:10:26,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:10:26,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:10:26,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:10:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-15 23:10:26,337 INFO L87 Difference]: Start difference. First operand 78684 states and 87418 transitions. Second operand has 3 states, 3 states have (on average 171.0) internal successors, (513), 3 states have internal predecessors, (513), 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)