./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/java_Nested.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/java_Nested.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0baccb6c9a05802d446420fb16b8e65dc76eab5e ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 02:58:31,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:58:31,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:58:31,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:58:31,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:58:31,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:58:31,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:58:31,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:58:31,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:58:31,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:58:31,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:58:31,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:58:31,844 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:58:31,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:58:31,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:58:31,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:58:31,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:58:31,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:58:31,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:58:31,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:58:31,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:58:31,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:58:31,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:58:31,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:58:31,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:58:31,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:58:31,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:58:31,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:58:31,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:58:31,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:58:31,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:58:31,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:58:31,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:58:31,884 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:58:31,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:58:31,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:58:31,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:58:31,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:58:31,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:58:31,887 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:58:31,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:58:31,891 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-28 02:58:31,919 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:58:31,919 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:58:31,921 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:58:31,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:58:31,921 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:58:31,921 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 02:58:31,921 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 02:58:31,922 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 02:58:31,922 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 02:58:31,922 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 02:58:31,922 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 02:58:31,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:58:31,923 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 02:58:31,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:58:31,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:58:31,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 02:58:31,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 02:58:31,923 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 02:58:31,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:58:31,924 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 02:58:31,924 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:58:31,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 02:58:31,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:58:31,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:58:31,926 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 02:58:31,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:58:31,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:58:31,927 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:58:31,928 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 02:58:31,930 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 02:58:31,930 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0baccb6c9a05802d446420fb16b8e65dc76eab5e [2020-11-28 02:58:32,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:58:32,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:58:32,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:58:32,208 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:58:32,217 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:58:32,218 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/java_Nested.c [2020-11-28 02:58:32,311 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/data/e062a3c4f/98d86993ac7d4fee8d84a3dd7bc346a1/FLAG2fc5833a8 [2020-11-28 02:58:32,738 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:58:32,738 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/sv-benchmarks/c/termination-restricted-15/java_Nested.c [2020-11-28 02:58:32,750 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/data/e062a3c4f/98d86993ac7d4fee8d84a3dd7bc346a1/FLAG2fc5833a8 [2020-11-28 02:58:33,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/data/e062a3c4f/98d86993ac7d4fee8d84a3dd7bc346a1 [2020-11-28 02:58:33,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:58:33,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:58:33,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:33,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:58:33,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:58:33,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7136efe4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33, skipping insertion in model container [2020-11-28 02:58:33,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:58:33,179 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:58:33,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:33,302 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:58:33,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:58:33,355 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:58:33,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33 WrapperNode [2020-11-28 02:58:33,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:58:33,359 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:33,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:58:33,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:58:33,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,391 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:58:33,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:58:33,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:58:33,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:58:33,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,402 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,404 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... [2020-11-28 02:58:33,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:58:33,412 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:58:33,412 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:58:33,412 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:58:33,413 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:33,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:58:33,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:58:33,686 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:58:33,687 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 02:58:33,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:33 BoogieIcfgContainer [2020-11-28 02:58:33,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:58:33,691 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 02:58:33,691 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 02:58:33,695 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 02:58:33,696 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 02:58:33,697 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 02:58:33" (1/3) ... [2020-11-28 02:58:33,698 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7662dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:58:33, skipping insertion in model container [2020-11-28 02:58:33,698 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 02:58:33,699 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:58:33" (2/3) ... [2020-11-28 02:58:33,699 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7662dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 02:58:33, skipping insertion in model container [2020-11-28 02:58:33,699 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 02:58:33,700 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:33" (3/3) ... [2020-11-28 02:58:33,701 INFO L373 chiAutomizerObserver]: Analyzing ICFG java_Nested.c [2020-11-28 02:58:33,765 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 02:58:33,765 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 02:58:33,766 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 02:58:33,766 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:58:33,766 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:58:33,766 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 02:58:33,766 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:58:33,767 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 02:58:33,782 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-28 02:58:33,805 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 02:58:33,806 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:33,806 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:33,812 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:33,812 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 02:58:33,812 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 02:58:33,813 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2020-11-28 02:58:33,814 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 02:58:33,814 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:33,815 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:33,815 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:33,815 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 02:58:33,822 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 7#L10-2true [2020-11-28 02:58:33,823 INFO L796 eck$LassoCheckResult]: Loop: 7#L10-2true assume !!(main_~i~0 < 10);main_~j~0 := 3; 3#L12-2true assume !(main_~j~0 < 12); 10#L12-3true main_~i~0 := 1 + main_~i~0; 7#L10-2true [2020-11-28 02:58:33,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:33,829 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-28 02:58:33,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:33,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585818916] [2020-11-28 02:58:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:33,916 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:33,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:33,938 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2020-11-28 02:58:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:33,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637157502] [2020-11-28 02:58:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:33,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:34,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637157502] [2020-11-28 02:58:34,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:58:34,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:58:34,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476248515] [2020-11-28 02:58:34,097 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:34,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:34,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 02:58:34,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 02:58:34,143 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2020-11-28 02:58:34,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:34,258 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-28 02:58:34,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:58:34,262 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-11-28 02:58:34,263 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-28 02:58:34,267 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2020-11-28 02:58:34,268 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2020-11-28 02:58:34,270 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-11-28 02:58:34,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2020-11-28 02:58:34,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:34,272 INFO L691 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-11-28 02:58:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2020-11-28 02:58:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2020-11-28 02:58:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-28 02:58:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2020-11-28 02:58:34,305 INFO L714 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-11-28 02:58:34,305 INFO L594 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2020-11-28 02:58:34,305 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 02:58:34,306 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2020-11-28 02:58:34,307 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-28 02:58:34,307 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:34,307 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:34,308 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:34,308 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-28 02:58:34,308 INFO L794 eck$LassoCheckResult]: Stem: 28#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 29#L10-2 [2020-11-28 02:58:34,309 INFO L796 eck$LassoCheckResult]: Loop: 29#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 26#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 27#L12-2 assume !(main_~j~0 < 12); 30#L12-3 main_~i~0 := 1 + main_~i~0; 29#L10-2 [2020-11-28 02:58:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-11-28 02:58:34,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:34,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458369176] [2020-11-28 02:58:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:34,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:34,319 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:34,323 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:34,324 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:34,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2020-11-28 02:58:34,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:34,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005727381] [2020-11-28 02:58:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:34,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005727381] [2020-11-28 02:58:34,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623089015] [2020-11-28 02:58:34,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:34,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 02:58:34,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:34,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:34,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-11-28 02:58:34,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926837887] [2020-11-28 02:58:34,491 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:34,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:34,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:58:34,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:58:34,493 INFO L87 Difference]: Start difference. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand 4 states. [2020-11-28 02:58:34,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:34,524 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2020-11-28 02:58:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:58:34,526 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6 states and 7 transitions. [2020-11-28 02:58:34,527 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 02:58:34,527 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6 states to 6 states and 7 transitions. [2020-11-28 02:58:34,528 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-28 02:58:34,528 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2020-11-28 02:58:34,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 7 transitions. [2020-11-28 02:58:34,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:34,528 INFO L691 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-28 02:58:34,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 7 transitions. [2020-11-28 02:58:34,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-11-28 02:58:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-28 02:58:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2020-11-28 02:58:34,529 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-28 02:58:34,529 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-11-28 02:58:34,530 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 02:58:34,530 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2020-11-28 02:58:34,530 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 02:58:34,530 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:34,530 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:34,530 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:34,531 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2020-11-28 02:58:34,531 INFO L794 eck$LassoCheckResult]: Stem: 55#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 56#L10-2 [2020-11-28 02:58:34,531 INFO L796 eck$LassoCheckResult]: Loop: 56#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 53#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 54#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 58#L12-2 assume !(main_~j~0 < 12); 57#L12-3 main_~i~0 := 1 + main_~i~0; 56#L10-2 [2020-11-28 02:58:34,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:34,531 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2020-11-28 02:58:34,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:34,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562714667] [2020-11-28 02:58:34,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:34,547 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:34,551 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:34,552 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:34,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:34,555 INFO L82 PathProgramCache]: Analyzing trace with hash 38449199, now seen corresponding path program 2 times [2020-11-28 02:58:34,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:34,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387674866] [2020-11-28 02:58:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:34,624 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:34,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387674866] [2020-11-28 02:58:34,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963455810] [2020-11-28 02:58:34,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-28 02:58:34,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:34,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:34,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:34,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:34,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:34,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-11-28 02:58:34,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611177332] [2020-11-28 02:58:34,682 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:34,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:58:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:58:34,683 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand 5 states. [2020-11-28 02:58:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:34,708 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2020-11-28 02:58:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:58:34,709 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 8 transitions. [2020-11-28 02:58:34,709 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-28 02:58:34,710 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 8 transitions. [2020-11-28 02:58:34,710 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-11-28 02:58:34,710 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-28 02:58:34,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2020-11-28 02:58:34,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:34,711 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-28 02:58:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2020-11-28 02:58:34,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-11-28 02:58:34,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 02:58:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-11-28 02:58:34,712 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-28 02:58:34,712 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-28 02:58:34,712 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 02:58:34,713 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2020-11-28 02:58:34,713 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-28 02:58:34,713 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:34,713 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:34,714 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:34,714 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 1, 1, 1] [2020-11-28 02:58:34,714 INFO L794 eck$LassoCheckResult]: Stem: 88#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 89#L10-2 [2020-11-28 02:58:34,714 INFO L796 eck$LassoCheckResult]: Loop: 89#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 86#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 87#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 92#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 91#L12-2 assume !(main_~j~0 < 12); 90#L12-3 main_~i~0 := 1 + main_~i~0; 89#L10-2 [2020-11-28 02:58:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:34,715 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2020-11-28 02:58:34,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:34,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459167121] [2020-11-28 02:58:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:34,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:34,722 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:34,724 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:34,725 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:34,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:34,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1191926928, now seen corresponding path program 3 times [2020-11-28 02:58:34,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:34,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405669977] [2020-11-28 02:58:34,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:34,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405669977] [2020-11-28 02:58:34,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432230247] [2020-11-28 02:58:34,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:34,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-28 02:58:34,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:34,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 02:58:34,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:34,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:34,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:34,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-28 02:58:34,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272395530] [2020-11-28 02:58:34,977 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:34,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:34,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 02:58:34,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:58:34,979 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 6 states. [2020-11-28 02:58:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:35,007 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2020-11-28 02:58:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 02:58:35,009 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2020-11-28 02:58:35,009 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-28 02:58:35,010 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 8 states and 9 transitions. [2020-11-28 02:58:35,010 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-28 02:58:35,010 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-28 02:58:35,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2020-11-28 02:58:35,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:35,010 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-28 02:58:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2020-11-28 02:58:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-28 02:58:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 02:58:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-11-28 02:58:35,012 INFO L714 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-28 02:58:35,012 INFO L594 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-28 02:58:35,012 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-28 02:58:35,012 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2020-11-28 02:58:35,012 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2020-11-28 02:58:35,013 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:35,013 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:35,013 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:35,013 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 1, 1, 1] [2020-11-28 02:58:35,013 INFO L794 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 128#L10-2 [2020-11-28 02:58:35,013 INFO L796 eck$LassoCheckResult]: Loop: 128#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 125#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 126#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 132#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 131#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 130#L12-2 assume !(main_~j~0 < 12); 129#L12-3 main_~i~0 := 1 + main_~i~0; 128#L10-2 [2020-11-28 02:58:35,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,014 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 5 times [2020-11-28 02:58:35,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958346684] [2020-11-28 02:58:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,020 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,032 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,034 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:35,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1704969137, now seen corresponding path program 4 times [2020-11-28 02:58:35,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359277352] [2020-11-28 02:58:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:35,131 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:35,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359277352] [2020-11-28 02:58:35,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505574197] [2020-11-28 02:58:35,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-28 02:58:35,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-28 02:58:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 02:58:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:35,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:35,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-28 02:58:35,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398879735] [2020-11-28 02:58:35,191 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:35,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:35,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 02:58:35,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:58:35,193 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 7 states. [2020-11-28 02:58:35,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:35,223 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-28 02:58:35,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 02:58:35,224 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-11-28 02:58:35,224 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-28 02:58:35,225 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2020-11-28 02:58:35,225 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-28 02:58:35,225 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-11-28 02:58:35,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2020-11-28 02:58:35,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:35,225 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-28 02:58:35,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2020-11-28 02:58:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-28 02:58:35,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-28 02:58:35,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-28 02:58:35,227 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-28 02:58:35,227 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-28 02:58:35,227 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-28 02:58:35,227 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2020-11-28 02:58:35,228 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-28 02:58:35,228 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:35,228 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:35,228 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:35,228 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [5, 1, 1, 1] [2020-11-28 02:58:35,228 INFO L794 eck$LassoCheckResult]: Stem: 172#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 173#L10-2 [2020-11-28 02:58:35,229 INFO L796 eck$LassoCheckResult]: Loop: 173#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 170#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 171#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 178#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 177#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 176#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 175#L12-2 assume !(main_~j~0 < 12); 174#L12-3 main_~i~0 := 1 + main_~i~0; 173#L10-2 [2020-11-28 02:58:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,229 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 6 times [2020-11-28 02:58:35,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019491547] [2020-11-28 02:58:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,233 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,234 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,241 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1314433936, now seen corresponding path program 5 times [2020-11-28 02:58:35,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146479483] [2020-11-28 02:58:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:35,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146479483] [2020-11-28 02:58:35,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480605479] [2020-11-28 02:58:35,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-28 02:58:35,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-28 02:58:35,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:35,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 02:58:35,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:35,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:35,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-28 02:58:35,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914621824] [2020-11-28 02:58:35,393 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:35,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:35,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 02:58:35,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-28 02:58:35,395 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 8 states. [2020-11-28 02:58:35,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:35,428 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2020-11-28 02:58:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 02:58:35,428 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2020-11-28 02:58:35,429 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-28 02:58:35,429 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2020-11-28 02:58:35,429 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2020-11-28 02:58:35,430 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-28 02:58:35,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2020-11-28 02:58:35,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:35,430 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-28 02:58:35,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2020-11-28 02:58:35,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 02:58:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 02:58:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-28 02:58:35,431 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-28 02:58:35,431 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-28 02:58:35,431 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-28 02:58:35,432 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2020-11-28 02:58:35,432 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-28 02:58:35,432 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:35,432 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:35,432 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:35,432 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 1, 1, 1] [2020-11-28 02:58:35,433 INFO L794 eck$LassoCheckResult]: Stem: 223#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 224#L10-2 [2020-11-28 02:58:35,433 INFO L796 eck$LassoCheckResult]: Loop: 224#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 221#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 222#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 230#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 229#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 228#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 227#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 226#L12-2 assume !(main_~j~0 < 12); 225#L12-3 main_~i~0 := 1 + main_~i~0; 224#L10-2 [2020-11-28 02:58:35,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,433 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 7 times [2020-11-28 02:58:35,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336815604] [2020-11-28 02:58:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,440 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,442 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,443 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2092744593, now seen corresponding path program 6 times [2020-11-28 02:58:35,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526604742] [2020-11-28 02:58:35,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:35,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526604742] [2020-11-28 02:58:35,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584535464] [2020-11-28 02:58:35,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:35,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-28 02:58:35,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:35,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 02:58:35,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:35,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:35,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-28 02:58:35,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093358767] [2020-11-28 02:58:35,634 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:35,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 02:58:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-28 02:58:35,635 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 9 states. [2020-11-28 02:58:35,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:35,663 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2020-11-28 02:58:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 02:58:35,663 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2020-11-28 02:58:35,664 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 02:58:35,665 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2020-11-28 02:58:35,665 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-28 02:58:35,665 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-28 02:58:35,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2020-11-28 02:58:35,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:35,665 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 02:58:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2020-11-28 02:58:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-28 02:58:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 02:58:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-28 02:58:35,667 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 02:58:35,667 INFO L594 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 02:58:35,667 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-28 02:58:35,668 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2020-11-28 02:58:35,668 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 02:58:35,668 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:35,668 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:35,669 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:35,669 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [7, 1, 1, 1] [2020-11-28 02:58:35,669 INFO L794 eck$LassoCheckResult]: Stem: 280#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 281#L10-2 [2020-11-28 02:58:35,669 INFO L796 eck$LassoCheckResult]: Loop: 281#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 278#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 279#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 288#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 287#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 286#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 285#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 284#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 283#L12-2 assume !(main_~j~0 < 12); 282#L12-3 main_~i~0 := 1 + main_~i~0; 281#L10-2 [2020-11-28 02:58:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,670 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 8 times [2020-11-28 02:58:35,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620153140] [2020-11-28 02:58:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,676 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,679 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,683 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:35,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,683 INFO L82 PathProgramCache]: Analyzing trace with hash -450571184, now seen corresponding path program 7 times [2020-11-28 02:58:35,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302149750] [2020-11-28 02:58:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:35,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302149750] [2020-11-28 02:58:35,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404695317] [2020-11-28 02:58:35,804 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-28 02:58:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:35,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-28 02:58:35,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:35,886 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:35,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:35,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-28 02:58:35,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810765280] [2020-11-28 02:58:35,887 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:35,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 02:58:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-28 02:58:35,888 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand 10 states. [2020-11-28 02:58:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:35,920 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-28 02:58:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 02:58:35,921 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2020-11-28 02:58:35,921 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-11-28 02:58:35,922 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2020-11-28 02:58:35,922 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2020-11-28 02:58:35,922 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-11-28 02:58:35,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2020-11-28 02:58:35,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:35,922 INFO L691 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-28 02:58:35,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2020-11-28 02:58:35,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-28 02:58:35,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-28 02:58:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-11-28 02:58:35,924 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-28 02:58:35,924 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-11-28 02:58:35,924 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-28 02:58:35,924 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2020-11-28 02:58:35,925 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-11-28 02:58:35,925 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:35,925 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:35,928 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:35,928 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [8, 1, 1, 1] [2020-11-28 02:58:35,929 INFO L794 eck$LassoCheckResult]: Stem: 343#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 344#L10-2 [2020-11-28 02:58:35,929 INFO L796 eck$LassoCheckResult]: Loop: 344#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 341#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 342#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 352#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 351#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 350#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 349#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 348#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 347#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 346#L12-2 assume !(main_~j~0 < 12); 345#L12-3 main_~i~0 := 1 + main_~i~0; 344#L10-2 [2020-11-28 02:58:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,930 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 9 times [2020-11-28 02:58:35,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007260288] [2020-11-28 02:58:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,937 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:35,939 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:35,940 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:35,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:35,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1082803057, now seen corresponding path program 8 times [2020-11-28 02:58:35,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:35,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847903497] [2020-11-28 02:58:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:36,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847903497] [2020-11-28 02:58:36,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333831141] [2020-11-28 02:58:36,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 02:58:36,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 02:58:36,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 02:58:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 02:58:36,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:36,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 02:58:36,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-28 02:58:36,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832405641] [2020-11-28 02:58:36,139 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 02:58:36,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:58:36,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 02:58:36,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-28 02:58:36,142 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 11 states. [2020-11-28 02:58:36,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:58:36,181 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-11-28 02:58:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 02:58:36,183 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2020-11-28 02:58:36,184 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-11-28 02:58:36,185 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2020-11-28 02:58:36,185 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-28 02:58:36,185 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2020-11-28 02:58:36,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2020-11-28 02:58:36,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:36,185 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-28 02:58:36,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2020-11-28 02:58:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-28 02:58:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 02:58:36,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-11-28 02:58:36,187 INFO L714 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-28 02:58:36,187 INFO L594 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-11-28 02:58:36,187 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-28 02:58:36,187 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2020-11-28 02:58:36,187 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-11-28 02:58:36,187 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:36,187 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:36,187 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-28 02:58:36,187 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [9, 1, 1, 1] [2020-11-28 02:58:36,188 INFO L794 eck$LassoCheckResult]: Stem: 412#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 413#L10-2 [2020-11-28 02:58:36,188 INFO L796 eck$LassoCheckResult]: Loop: 413#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 410#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 411#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 422#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 421#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 420#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 419#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 418#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 417#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 416#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 415#L12-2 assume !(main_~j~0 < 12); 414#L12-3 main_~i~0 := 1 + main_~i~0; 413#L10-2 [2020-11-28 02:58:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 10 times [2020-11-28 02:58:36,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:36,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248651831] [2020-11-28 02:58:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:36,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:36,191 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:36,193 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:36,193 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:36,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:36,194 INFO L82 PathProgramCache]: Analyzing trace with hash 792845360, now seen corresponding path program 9 times [2020-11-28 02:58:36,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:36,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778159059] [2020-11-28 02:58:36,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:36,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:36,207 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:36,216 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:36,218 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:36,219 INFO L82 PathProgramCache]: Analyzing trace with hash 287286735, now seen corresponding path program 1 times [2020-11-28 02:58:36,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:36,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055541391] [2020-11-28 02:58:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:36,229 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:36,238 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:36,241 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:36,461 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-11-28 02:58:36,489 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:36,489 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:36,489 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:36,490 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:36,490 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 02:58:36,490 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:36,490 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:36,490 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:36,490 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration10_Loop [2020-11-28 02:58:36,491 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:36,491 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:36,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:36,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:36,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:36,525 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:36,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:36,601 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:36,602 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:36,612 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:36,612 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:36,621 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:36,621 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:36,665 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:36,665 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:36,670 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:36,671 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:36,717 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:36,718 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:36,721 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:36,721 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~j~0=12} Honda state: {ULTIMATE.start_main_~j~0=12} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:36,785 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:36,785 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:36,834 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 02:58:36,834 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:36,875 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 02:58:36,877 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:36,877 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:36,877 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:36,877 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:36,877 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 02:58:36,877 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:36,877 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:36,877 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:36,878 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration10_Loop [2020-11-28 02:58:36,878 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:36,878 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:36,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:36,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:36,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:36,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:36,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:37,003 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:37,009 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,017 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 02:58:37,020 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:37,020 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:37,020 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:37,020 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:37,025 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 02:58:37,026 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-28 02:58:37,030 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,054 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 02:58:37,055 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:37,055 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 02:58:37,056 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:37,056 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:37,056 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:37,057 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 02:58:37,057 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 02:58:37,059 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,085 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 02:58:37,087 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:37,088 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:37,088 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:37,088 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:37,096 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 02:58:37,097 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-28 02:58:37,104 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,148 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 02:58:37,150 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:37,150 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 02:58:37,150 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:37,150 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:37,150 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:37,152 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 02:58:37,152 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 02:58:37,154 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 02:58:37,165 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 02:58:37,165 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:37,170 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 02:58:37,170 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 02:58:37,170 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 02:58:37,171 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 19 Supporting invariants [] Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,193 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 02:58:37,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:37,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:37,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:37,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:37,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:37,430 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-28 02:58:37,438 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-28 02:58:37,438 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-28 02:58:37,472 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 25 states and 28 transitions. Complement of second has 4 states. [2020-11-28 02:58:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 02:58:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-28 02:58:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-28 02:58:37,475 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 12 letters. [2020-11-28 02:58:37,476 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:37,476 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 13 letters. Loop has 12 letters. [2020-11-28 02:58:37,476 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:37,476 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 24 letters. [2020-11-28 02:58:37,477 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:37,477 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 28 transitions. [2020-11-28 02:58:37,478 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-28 02:58:37,479 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 27 transitions. [2020-11-28 02:58:37,479 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-28 02:58:37,479 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-11-28 02:58:37,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 27 transitions. [2020-11-28 02:58:37,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 02:58:37,479 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-28 02:58:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 27 transitions. [2020-11-28 02:58:37,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2020-11-28 02:58:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 02:58:37,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-11-28 02:58:37,481 INFO L714 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-28 02:58:37,481 INFO L594 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-28 02:58:37,481 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-28 02:58:37,481 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2020-11-28 02:58:37,482 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-28 02:58:37,482 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:37,482 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:37,482 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 02:58:37,482 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-28 02:58:37,483 INFO L794 eck$LassoCheckResult]: Stem: 510#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 511#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 507#L12-2 [2020-11-28 02:58:37,483 INFO L796 eck$LassoCheckResult]: Loop: 507#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 507#L12-2 [2020-11-28 02:58:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:37,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-28 02:58:37,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:37,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109067419] [2020-11-28 02:58:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:37,491 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:37,494 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:37,495 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:37,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:37,498 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2020-11-28 02:58:37,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:37,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149713662] [2020-11-28 02:58:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:37,504 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:37,509 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:37,510 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:37,511 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2020-11-28 02:58:37,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:37,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817471156] [2020-11-28 02:58:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:37,515 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:37,520 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:37,522 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:37,541 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:37,541 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:37,541 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:37,541 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:37,541 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 02:58:37,541 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,541 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:37,541 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:37,541 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration11_Loop [2020-11-28 02:58:37,541 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:37,542 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:37,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:37,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:37,553 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:37,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:37,654 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:37,654 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:37,672 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:37,672 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,677 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:37,677 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,720 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:37,721 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:37,724 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:37,724 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:37,768 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:37,768 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:37,819 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 02:58:37,819 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,837 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:37,837 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~c~0=0} Honda state: {ULTIMATE.start_main_~c~0=0} Generalized eigenvectors: [{ULTIMATE.start_main_~c~0=3}, {ULTIMATE.start_main_~c~0=3}, {ULTIMATE.start_main_~c~0=-5}] Lambdas: [0, 1, 1] Nus: [1, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,882 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:37,882 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,921 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 02:58:37,922 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:37,949 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 02:58:37,951 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:37,951 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:37,951 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:37,951 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:37,951 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 02:58:37,952 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:37,952 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:37,952 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:37,952 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration11_Loop [2020-11-28 02:58:37,952 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:37,952 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:37,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:37,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:37,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:37,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:38,041 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:38,042 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:38,045 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 02:58:38,047 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:38,047 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:38,047 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:38,047 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:38,050 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 02:58:38,050 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,055 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,087 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 02:58:38,089 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:38,089 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:38,089 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:38,089 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:38,099 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-28 02:58:38,099 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-28 02:58:38,104 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,131 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 02:58:38,132 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:38,132 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 02:58:38,132 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:38,132 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:38,132 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:38,133 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 02:58:38,133 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 02:58:38,134 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,158 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 02:58:38,159 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:38,160 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 02:58:38,160 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:38,160 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:38,160 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:38,161 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 02:58:38,161 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 02:58:38,169 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 02:58:38,178 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 02:58:38,178 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:38,182 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 02:58:38,182 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 02:58:38,182 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 02:58:38,182 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = -2*ULTIMATE.start_main_~j~0 + 23 Supporting invariants [] Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,218 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 02:58:38,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:38,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:38,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:38,260 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-28 02:58:38,260 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 2 states. [2020-11-28 02:58:38,273 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 31 states and 36 transitions. Complement of second has 5 states. [2020-11-28 02:58:38,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 02:58:38,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-28 02:58:38,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-28 02:58:38,274 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2020-11-28 02:58:38,275 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:38,275 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2020-11-28 02:58:38,275 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:38,275 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-11-28 02:58:38,275 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:38,275 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 36 transitions. [2020-11-28 02:58:38,276 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-28 02:58:38,277 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 27 states and 31 transitions. [2020-11-28 02:58:38,277 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2020-11-28 02:58:38,277 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2020-11-28 02:58:38,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 31 transitions. [2020-11-28 02:58:38,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 02:58:38,277 INFO L691 BuchiCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-28 02:58:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 31 transitions. [2020-11-28 02:58:38,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2020-11-28 02:58:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-28 02:58:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-28 02:58:38,279 INFO L714 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-28 02:58:38,280 INFO L594 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-28 02:58:38,280 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-11-28 02:58:38,280 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2020-11-28 02:58:38,280 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2020-11-28 02:58:38,280 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 02:58:38,280 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 02:58:38,281 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [9, 2, 1, 1, 1] [2020-11-28 02:58:38,281 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1] [2020-11-28 02:58:38,281 INFO L794 eck$LassoCheckResult]: Stem: 585#ULTIMATE.startENTRY havoc main_#res;havoc main_~i~0, main_~j~0, main_~c~0;havoc main_~i~0;havoc main_~j~0;havoc main_~c~0;main_~c~0 := 0;main_~i~0 := 0; 586#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 583#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 584#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 596#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 595#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 594#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 593#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 592#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 591#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 590#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 589#L12-2 assume !(main_~j~0 < 12); 588#L12-3 main_~i~0 := 1 + main_~i~0; 587#L10-2 assume !!(main_~i~0 < 10);main_~j~0 := 3; 582#L12-2 [2020-11-28 02:58:38,281 INFO L796 eck$LassoCheckResult]: Loop: 582#L12-2 assume !!(main_~j~0 < 12);main_~j~0 := main_~j~0 - 1;main_~c~0 := 1 + main_~c~0;main_~j~0 := 2 + main_~j~0; 582#L12-2 [2020-11-28 02:58:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:38,282 INFO L82 PathProgramCache]: Analyzing trace with hash 315954203, now seen corresponding path program 2 times [2020-11-28 02:58:38,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:38,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484794114] [2020-11-28 02:58:38,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:38,307 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:38,332 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:38,335 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:38,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2020-11-28 02:58:38,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:38,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950381870] [2020-11-28 02:58:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:38,338 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:38,340 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:38,341 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:38,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:38,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1204645720, now seen corresponding path program 3 times [2020-11-28 02:58:38,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:58:38,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261474686] [2020-11-28 02:58:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:58:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:38,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:38,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:58:38,358 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:58:38,360 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:58:38,384 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:38,384 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:38,384 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:38,384 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:38,384 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 02:58:38,384 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,384 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:38,384 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:38,384 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration12_Loop [2020-11-28 02:58:38,384 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:38,384 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:38,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:38,393 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:38,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:38,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:38,474 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:38,474 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,478 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:38,478 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,509 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 02:58:38,509 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:38,523 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:38,523 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~c~0=0} Honda state: {ULTIMATE.start_main_~c~0=0} Generalized eigenvectors: [{ULTIMATE.start_main_~c~0=3}, {ULTIMATE.start_main_~c~0=3}, {ULTIMATE.start_main_~c~0=-5}] Lambdas: [0, 1, 1] Nus: [1, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,546 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:38,546 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:38,549 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 02:58:38,550 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,574 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 02:58:38,574 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,600 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 02:58:38,600 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 02:58:38,643 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 02:58:38,644 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 02:58:38,645 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 02:58:38,645 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 02:58:38,645 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 02:58:38,645 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 02:58:38,645 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,645 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 02:58:38,645 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 02:58:38,645 INFO L133 ssoRankerPreferences]: Filename of dumped script: java_Nested.c_Iteration12_Loop [2020-11-28 02:58:38,645 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 02:58:38,645 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 02:58:38,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:38,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:38,689 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:38,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 02:58:38,788 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 02:58:38,788 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 02:58:38,794 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,795 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:38,795 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 02:58:38,795 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:38,795 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:38,796 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:38,796 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 02:58:38,796 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 02:58:38,798 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,820 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 02:58:38,821 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 02:58:38,821 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 02:58:38,821 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 02:58:38,821 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 02:58:38,821 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 02:58:38,822 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 02:58:38,822 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 02:58:38,824 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 02:58:38,826 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 02:58:38,826 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c16cfd06-725c-4c1f-b228-58b570cb8187/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 02:58:38,829 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 02:58:38,829 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 02:58:38,830 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 02:58:38,830 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0) = -2*ULTIMATE.start_main_~j~0 + 23 Supporting invariants [] [2020-11-28 02:58:38,852 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 02:58:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:38,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:38,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:38,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:38,901 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-28 02:58:38,901 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-28 02:58:38,915 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2020-11-28 02:58:38,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 02:58:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-28 02:58:38,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-28 02:58:38,917 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-28 02:58:38,917 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:38,917 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 02:58:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:38,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:38,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:38,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:38,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:38,962 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-28 02:58:38,962 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-28 02:58:38,973 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2020-11-28 02:58:38,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 02:58:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-28 02:58:38,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-11-28 02:58:38,976 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-28 02:58:38,976 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:38,976 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 02:58:38,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:58:39,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:39,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 02:58:39,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:39,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:58:39,021 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 02:58:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 02:58:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 02:58:39,022 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-28 02:58:39,022 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2020-11-28 02:58:39,035 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 18 states and 20 transitions. Complement of second has 4 states. [2020-11-28 02:58:39,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 02:58:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2020-11-28 02:58:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2020-11-28 02:58:39,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 1 letters. [2020-11-28 02:58:39,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:39,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 15 letters. Loop has 1 letters. [2020-11-28 02:58:39,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:39,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 2 letters. [2020-11-28 02:58:39,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 02:58:39,039 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2020-11-28 02:58:39,039 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 02:58:39,039 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2020-11-28 02:58:39,039 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 02:58:39,039 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 02:58:39,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 02:58:39,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 02:58:39,040 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:39,040 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:39,040 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 02:58:39,040 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-11-28 02:58:39,040 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-28 02:58:39,040 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 02:58:39,040 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-28 02:58:39,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 02:58:39 BoogieIcfgContainer [2020-11-28 02:58:39,049 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 02:58:39,050 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:58:39,050 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:58:39,050 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:58:39,051 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:58:33" (3/4) ... [2020-11-28 02:58:39,054 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 02:58:39,054 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:58:39,062 INFO L168 Benchmark]: Toolchain (without parser) took 5912.63 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 79.3 MB in the beginning and 74.4 MB in the end (delta: 4.9 MB). Peak memory consumption was 28.0 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,063 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 73.4 MB. Free memory was 31.8 MB in the beginning and 31.7 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:39,063 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.08 ms. Allocated memory is still 111.1 MB. Free memory was 79.1 MB in the beginning and 89.7 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,063 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.45 ms. Allocated memory is still 111.1 MB. Free memory was 89.7 MB in the beginning and 88.9 MB in the end (delta: 778.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:39,064 INFO L168 Benchmark]: Boogie Preprocessor took 19.14 ms. Allocated memory is still 111.1 MB. Free memory was 88.9 MB in the beginning and 87.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:39,064 INFO L168 Benchmark]: RCFGBuilder took 278.66 ms. Allocated memory is still 111.1 MB. Free memory was 87.8 MB in the beginning and 79.4 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,065 INFO L168 Benchmark]: BuchiAutomizer took 5358.50 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 79.4 MB in the beginning and 74.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2020-11-28 02:58:39,065 INFO L168 Benchmark]: Witness Printer took 3.91 ms. Allocated memory is still 134.2 MB. Free memory is still 74.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:58:39,073 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 73.4 MB. Free memory was 31.8 MB in the beginning and 31.7 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 209.08 ms. Allocated memory is still 111.1 MB. Free memory was 79.1 MB in the beginning and 89.7 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.45 ms. Allocated memory is still 111.1 MB. Free memory was 89.7 MB in the beginning and 88.9 MB in the end (delta: 778.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.14 ms. Allocated memory is still 111.1 MB. Free memory was 88.9 MB in the beginning and 87.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 278.66 ms. Allocated memory is still 111.1 MB. Free memory was 87.8 MB in the beginning and 79.4 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 5358.50 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 79.4 MB in the beginning and 74.4 MB in the end (delta: 5.0 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. * Witness Printer took 3.91 ms. Allocated memory is still 134.2 MB. Free memory is still 74.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (9 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -2 * i + 19 and consists of 3 locations. One deterministic module has affine ranking function -2 * j + 23 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * j + 23 and consists of 3 locations. 9 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.2s and 13 iterations. TraceHistogramMax:9. Analysis of lassos took 4.1s. Construction of modules took 0.2s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 10. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 10. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 45/45 HoareTripleCheckerStatistics: 62 SDtfs, 21 SDslu, 50 SDs, 0 SdLazy, 157 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI9 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax170 hnf97 lsp34 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 20ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...