./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 cb528549fa76ae8087cf7043645dfa20323a0116 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-12-07 14:11:54,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-12-07 14:11:54,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-12-07 14:11:54,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-12-07 14:11:54,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-12-07 14:11:54,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-12-07 14:11:54,138 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-12-07 14:11:54,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-12-07 14:11:54,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-12-07 14:11:54,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-12-07 14:11:54,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-12-07 14:11:54,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-12-07 14:11:54,143 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-12-07 14:11:54,143 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-12-07 14:11:54,144 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-12-07 14:11:54,145 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-12-07 14:11:54,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-12-07 14:11:54,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-12-07 14:11:54,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-12-07 14:11:54,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-12-07 14:11:54,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-12-07 14:11:54,151 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-12-07 14:11:54,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-12-07 14:11:54,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-12-07 14:11:54,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-12-07 14:11:54,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-12-07 14:11:54,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-12-07 14:11:54,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-12-07 14:11:54,155 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-12-07 14:11:54,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-12-07 14:11:54,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-12-07 14:11:54,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-12-07 14:11:54,157 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-12-07 14:11:54,157 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-12-07 14:11:54,158 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-12-07 14:11:54,158 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-12-07 14:11:54,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-12-07 14:11:54,159 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-12-07 14:11:54,159 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-12-07 14:11:54,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-12-07 14:11:54,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-12-07 14:11:54,160 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-12-07 14:11:54,171 INFO L113 SettingsManager]: Loading preferences was successful [2019-12-07 14:11:54,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-12-07 14:11:54,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-12-07 14:11:54,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-12-07 14:11:54,172 INFO L138 SettingsManager]: * Use SBE=true [2019-12-07 14:11:54,172 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-12-07 14:11:54,172 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-12-07 14:11:54,172 INFO L138 SettingsManager]: * Use old map elimination=false [2019-12-07 14:11:54,172 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-12-07 14:11:54,173 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-12-07 14:11:54,173 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-12-07 14:11:54,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-12-07 14:11:54,173 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-12-07 14:11:54,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-12-07 14:11:54,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-12-07 14:11:54,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-12-07 14:11:54,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-12-07 14:11:54,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-12-07 14:11:54,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-12-07 14:11:54,174 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-12-07 14:11:54,174 INFO L138 SettingsManager]: * Use constant arrays=true [2019-12-07 14:11:54,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-12-07 14:11:54,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-12-07 14:11:54,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-12-07 14:11:54,174 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-12-07 14:11:54,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-12-07 14:11:54,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-12-07 14:11:54,175 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-12-07 14:11:54,175 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-12-07 14:11:54,175 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-12-07 14:11:54,175 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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_78b88798-941e-4e02-8530-c4598dac3e84/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 -> cb528549fa76ae8087cf7043645dfa20323a0116 [2019-12-07 14:11:54,273 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-12-07 14:11:54,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-12-07 14:11:54,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-12-07 14:11:54,287 INFO L271 PluginConnector]: Initializing CDTParser... [2019-12-07 14:11:54,288 INFO L275 PluginConnector]: CDTParser initialized [2019-12-07 14:11:54,288 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2019-12-07 14:11:54,336 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/data/e20d3b6ae/035d63dc667949668833bf566494f692/FLAGc2421935c [2019-12-07 14:11:54,691 INFO L306 CDTParser]: Found 1 translation units. [2019-12-07 14:11:54,691 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2019-12-07 14:11:54,695 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/data/e20d3b6ae/035d63dc667949668833bf566494f692/FLAGc2421935c [2019-12-07 14:11:54,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/data/e20d3b6ae/035d63dc667949668833bf566494f692 [2019-12-07 14:11:54,705 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-12-07 14:11:54,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-12-07 14:11:54,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-12-07 14:11:54,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-12-07 14:11:54,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-12-07 14:11:54,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e89f668 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54, skipping insertion in model container [2019-12-07 14:11:54,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-12-07 14:11:54,727 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-12-07 14:11:54,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:11:54,823 INFO L203 MainTranslator]: Completed pre-run [2019-12-07 14:11:54,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-12-07 14:11:54,875 INFO L208 MainTranslator]: Completed translation [2019-12-07 14:11:54,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54 WrapperNode [2019-12-07 14:11:54,876 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-12-07 14:11:54,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-12-07 14:11:54,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-12-07 14:11:54,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-12-07 14:11:54,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,895 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-12-07 14:11:54,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-12-07 14:11:54,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-12-07 14:11:54,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-12-07 14:11:54,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,904 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... [2019-12-07 14:11:54,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-12-07 14:11:54,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-12-07 14:11:54,908 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-12-07 14:11:54,908 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-12-07 14:11:54,909 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-12-07 14:11:54,955 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-12-07 14:11:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-12-07 14:11:54,955 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-12-07 14:11:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-12-07 14:11:54,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-12-07 14:11:55,047 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-12-07 14:11:55,047 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-12-07 14:11:55,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:11:55 BoogieIcfgContainer [2019-12-07 14:11:55,048 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-12-07 14:11:55,048 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-12-07 14:11:55,048 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-12-07 14:11:55,050 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-12-07 14:11:55,051 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 14:11:55,051 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 07.12 02:11:54" (1/3) ... [2019-12-07 14:11:55,052 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@79e02374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 02:11:55, skipping insertion in model container [2019-12-07 14:11:55,052 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 14:11:55,052 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 02:11:54" (2/3) ... [2019-12-07 14:11:55,052 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@79e02374 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 07.12 02:11:55, skipping insertion in model container [2019-12-07 14:11:55,052 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-12-07 14:11:55,052 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:11:55" (3/3) ... [2019-12-07 14:11:55,053 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2019-12-07 14:11:55,082 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-12-07 14:11:55,082 INFO L357 BuchiCegarLoop]: Hoare is false [2019-12-07 14:11:55,082 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-12-07 14:11:55,082 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-12-07 14:11:55,082 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-12-07 14:11:55,082 INFO L361 BuchiCegarLoop]: Difference is false [2019-12-07 14:11:55,082 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-12-07 14:11:55,083 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-12-07 14:11:55,092 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-12-07 14:11:55,108 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-12-07 14:11:55,108 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:11:55,108 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:11:55,113 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 14:11:55,113 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:11:55,113 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-12-07 14:11:55,113 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-12-07 14:11:55,115 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-12-07 14:11:55,115 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:11:55,115 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:11:55,116 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-12-07 14:11:55,116 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:11:55,121 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2019-12-07 14:11:55,121 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j - 1);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3);< 3#rec2ENTRYtrue [2019-12-07 14:11:55,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:55,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2019-12-07 14:11:55,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:55,131 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542615531] [2019-12-07 14:11:55,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:55,193 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2019-12-07 14:11:55,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:55,194 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078082963] [2019-12-07 14:11:55,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:55,209 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:55,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:55,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2019-12-07 14:11:55,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:55,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411545013] [2019-12-07 14:11:55,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:55,221 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:55,315 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:11:55,316 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:11:55,316 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:11:55,316 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:11:55,316 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:11:55,316 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,316 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:11:55,316 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:11:55,316 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2019-12-07 14:11:55,316 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:11:55,317 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:11:55,329 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,374 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:11:55,375 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 2 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 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,379 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:55,379 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:55,385 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:55,385 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 3 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 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,389 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:55,389 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:55,392 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:55,392 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 4 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 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,396 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:55,396 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:55,399 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:55,399 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 5 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,402 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:55,403 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:55,405 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:55,405 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 6 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,409 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:55,409 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 7 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,416 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:11:55,416 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:55,420 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:11:55,421 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:11:55,421 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:11:55,422 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:11:55,422 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:11:55,422 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:11:55,422 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,422 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:11:55,422 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:11:55,422 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2019-12-07 14:11:55,422 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:11:55,422 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:11:55,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:55,459 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:11:55,463 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 8 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,467 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 [2019-12-07 14:11:55,469 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:55,469 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:55,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:55,470 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:55,470 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:55,472 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:55,472 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:55,474 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 9 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,478 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 [2019-12-07 14:11:55,479 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:55,479 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:55,480 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:55,480 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:55,480 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:55,480 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:55,480 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:55,482 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,485 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 [2019-12-07 14:11:55,486 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:55,486 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:55,486 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:55,487 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:55,487 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:55,487 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:55,487 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:55,488 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,492 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 [2019-12-07 14:11:55,493 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:55,493 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:55,493 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:55,493 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:55,493 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:55,494 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:55,495 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:55,496 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:11:55,499 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-12-07 14:11:55,499 INFO L444 ModelExtractionUtils]: 1 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_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:55,502 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:11:55,502 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:11:55,502 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:11:55,503 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2019-12-07 14:11:55,506 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:11:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:55,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:55,531 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-12-07 14:11:55,532 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:11:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:55,549 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2019-12-07 14:11:55,550 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:11:55,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:11:55,606 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2019-12-07 14:11:55,607 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 7 states. [2019-12-07 14:11:55,958 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 7 states. Result 194 states and 279 transitions. Complement of second has 61 states. [2019-12-07 14:11:55,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2019-12-07 14:11:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-12-07 14:11:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2019-12-07 14:11:55,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2019-12-07 14:11:55,966 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:11:55,966 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2019-12-07 14:11:55,966 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:11:55,967 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2019-12-07 14:11:55,967 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:11:55,968 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2019-12-07 14:11:55,983 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-12-07 14:11:55,992 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2019-12-07 14:11:55,993 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2019-12-07 14:11:55,993 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2019-12-07 14:11:55,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2019-12-07 14:11:55,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:11:55,994 INFO L688 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2019-12-07 14:11:56,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2019-12-07 14:11:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2019-12-07 14:11:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-12-07 14:11:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2019-12-07 14:11:56,025 INFO L711 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2019-12-07 14:11:56,025 INFO L591 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2019-12-07 14:11:56,025 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-12-07 14:11:56,026 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2019-12-07 14:11:56,027 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-12-07 14:11:56,028 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:11:56,028 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:11:56,028 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:11:56,028 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 14:11:56,029 INFO L794 eck$LassoCheckResult]: Stem: 378#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 345#L25 call main_#t~ret6 := rec2(main_~x~0);< 344#rec2ENTRY ~j := #in~j; 347#L18 assume !(~j <= 0); 363#L20 call #t~ret3 := rec1(~j - 1);< 379#rec1ENTRY ~i := #in~i; 397#L12 assume !(~i <= 0); 351#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2019-12-07 14:11:56,029 INFO L796 eck$LassoCheckResult]: Loop: 350#rec1ENTRY ~i := #in~i; 358#L12 assume !(~i <= 0); 354#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2019-12-07 14:11:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2019-12-07 14:11:56,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,029 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500837138] [2019-12-07 14:11:56,029 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,042 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,042 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2019-12-07 14:11:56,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,043 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447108451] [2019-12-07 14:11:56,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,048 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,048 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2019-12-07 14:11:56,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,049 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558621953] [2019-12-07 14:11:56,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,060 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:56,081 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:11:56,081 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:11:56,081 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:11:56,081 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:11:56,081 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:11:56,081 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,081 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:11:56,081 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:11:56,081 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2019-12-07 14:11:56,081 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:11:56,082 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:11:56,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,112 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:11:56,112 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,115 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:56,115 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:56,118 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:56,118 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,122 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:56,122 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:56,125 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:56,125 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:56,128 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:56,130 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:56,131 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,134 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:56,134 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:56,136 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:56,137 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,140 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:56,140 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:56,142 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:56,143 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,146 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:56,146 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,152 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:11:56,152 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:56,157 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:11:56,158 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:11:56,159 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:11:56,159 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:11:56,159 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:11:56,159 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:11:56,159 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,159 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:11:56,159 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:11:56,159 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2019-12-07 14:11:56,159 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:11:56,159 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:11:56,160 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,166 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,196 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:11:56,196 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,200 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 [2019-12-07 14:11:56,201 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:56,201 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:56,201 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:56,201 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:56,201 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:56,202 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:56,202 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:56,203 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,207 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 [2019-12-07 14:11:56,208 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:56,208 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:56,208 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:56,208 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:56,208 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:56,209 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:56,209 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:56,210 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,213 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 [2019-12-07 14:11:56,214 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:56,215 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:56,215 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:56,215 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:56,215 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:56,215 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:56,215 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:56,216 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,221 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 [2019-12-07 14:11:56,222 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:56,222 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:56,222 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:56,222 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:56,222 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:56,223 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:56,223 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:56,224 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,228 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 [2019-12-07 14:11:56,229 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:56,229 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:56,229 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:56,230 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:56,230 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:56,231 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:56,231 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:56,232 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:11:56,234 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-12-07 14:11:56,234 INFO L444 ModelExtractionUtils]: 1 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_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,236 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:11:56,237 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:11:56,237 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:11:56,237 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-12-07 14:11:56,238 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:11:56,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,257 INFO L264 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 14:11:56,258 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:11:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,265 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 14:11:56,265 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:11:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:11:56,277 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-12-07 14:11:56,277 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 Second operand 4 states. [2019-12-07 14:11:56,312 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. Second operand 4 states. Result 105 states and 149 transitions. Complement of second has 13 states. [2019-12-07 14:11:56,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 14:11:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 14:11:56,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2019-12-07 14:11:56,313 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2019-12-07 14:11:56,314 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:11:56,314 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2019-12-07 14:11:56,314 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:11:56,314 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2019-12-07 14:11:56,314 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:11:56,314 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2019-12-07 14:11:56,318 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-12-07 14:11:56,322 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2019-12-07 14:11:56,322 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2019-12-07 14:11:56,322 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2019-12-07 14:11:56,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2019-12-07 14:11:56,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:11:56,324 INFO L688 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2019-12-07 14:11:56,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2019-12-07 14:11:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2019-12-07 14:11:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-12-07 14:11:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2019-12-07 14:11:56,334 INFO L711 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2019-12-07 14:11:56,334 INFO L591 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2019-12-07 14:11:56,334 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-12-07 14:11:56,334 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2019-12-07 14:11:56,335 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-12-07 14:11:56,336 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:11:56,336 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:11:56,336 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:11:56,336 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 14:11:56,337 INFO L794 eck$LassoCheckResult]: Stem: 613#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 614#L25 call main_#t~ret6 := rec2(main_~x~0);< 620#rec2ENTRY ~j := #in~j; 633#L18 assume !(~j <= 0); 615#L20 call #t~ret3 := rec1(~j - 1);< 642#rec1ENTRY ~i := #in~i; 637#L12 assume !(~i <= 0); 577#L14 call #t~ret0 := rec1(~i - 2);< 576#rec1ENTRY ~i := #in~i; 579#L12 assume ~i <= 0;#res := 0; 583#rec1FINAL assume true; 584#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 595#rec1ENTRY [2019-12-07 14:11:56,337 INFO L796 eck$LassoCheckResult]: Loop: 595#rec1ENTRY ~i := #in~i; 632#L12 assume !(~i <= 0); 589#L14 call #t~ret0 := rec1(~i - 2);< 595#rec1ENTRY [2019-12-07 14:11:56,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2019-12-07 14:11:56,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981454960] [2019-12-07 14:11:56,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,349 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:56,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,349 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2019-12-07 14:11:56,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740264714] [2019-12-07 14:11:56,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,353 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:56,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,353 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2019-12-07 14:11:56,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,353 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715371490] [2019-12-07 14:11:56,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 14:11:56,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715371490] [2019-12-07 14:11:56,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-12-07 14:11:56,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-12-07 14:11:56,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261686490] [2019-12-07 14:11:56,417 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:11:56,417 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:11:56,417 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:11:56,417 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:11:56,417 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:11:56,417 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,417 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:11:56,417 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:11:56,417 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2019-12-07 14:11:56,417 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:11:56,417 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:11:56,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,442 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:11:56,443 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:56,446 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:56,448 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:11:56,448 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,452 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:56,452 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,458 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:11:56,458 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:11:56,500 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:11:56,501 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:11:56,501 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:11:56,501 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:11:56,501 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:11:56,501 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:11:56,501 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,501 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:11:56,501 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:11:56,501 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2019-12-07 14:11:56,501 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:11:56,501 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:11:56,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,504 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,511 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:56,526 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:11:56,527 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,529 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 [2019-12-07 14:11:56,530 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:56,530 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:56,530 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:56,530 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:56,531 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:56,531 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:56,531 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:56,532 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:56,536 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 [2019-12-07 14:11:56,537 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:11:56,537 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:11:56,537 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:11:56,537 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:11:56,537 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:11:56,538 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:11:56,538 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:11:56,539 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:11:56,541 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-12-07 14:11:56,541 INFO L444 ModelExtractionUtils]: 1 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_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:56,543 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:11:56,543 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:11:56,544 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:11:56,544 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-12-07 14:11:56,545 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:11:56,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,565 INFO L264 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-12-07 14:11:56,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:11:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,583 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 14:11:56,584 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:11:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:11:56,596 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 14:11:56,596 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 Second operand 5 states. [2019-12-07 14:11:56,649 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. Second operand 5 states. Result 134 states and 193 transitions. Complement of second has 14 states. [2019-12-07 14:11:56,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 14:11:56,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 14:11:56,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2019-12-07 14:11:56,650 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2019-12-07 14:11:56,650 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:11:56,650 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2019-12-07 14:11:56,650 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:11:56,650 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2019-12-07 14:11:56,651 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:11:56,651 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2019-12-07 14:11:56,655 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-12-07 14:11:56,658 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2019-12-07 14:11:56,658 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2019-12-07 14:11:56,658 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2019-12-07 14:11:56,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2019-12-07 14:11:56,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:11:56,658 INFO L688 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2019-12-07 14:11:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2019-12-07 14:11:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2019-12-07 14:11:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-07 14:11:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2019-12-07 14:11:56,667 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2019-12-07 14:11:56,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:11:56,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:11:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:11:56,669 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand 6 states. [2019-12-07 14:11:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:11:56,699 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2019-12-07 14:11:56,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 14:11:56,700 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2019-12-07 14:11:56,702 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-12-07 14:11:56,705 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2019-12-07 14:11:56,705 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2019-12-07 14:11:56,706 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2019-12-07 14:11:56,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2019-12-07 14:11:56,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:11:56,706 INFO L688 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2019-12-07 14:11:56,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2019-12-07 14:11:56,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2019-12-07 14:11:56,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-12-07 14:11:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2019-12-07 14:11:56,716 INFO L711 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2019-12-07 14:11:56,716 INFO L591 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2019-12-07 14:11:56,716 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-12-07 14:11:56,716 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2019-12-07 14:11:56,717 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-12-07 14:11:56,717 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:11:56,717 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:11:56,718 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:11:56,718 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 14:11:56,718 INFO L794 eck$LassoCheckResult]: Stem: 1167#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1168#L25 call main_#t~ret6 := rec2(main_~x~0);< 1174#rec2ENTRY ~j := #in~j; 1185#L18 assume !(~j <= 0); 1146#L20 call #t~ret3 := rec1(~j - 1);< 1184#rec1ENTRY ~i := #in~i; 1183#L12 assume !(~i <= 0); 1156#L14 call #t~ret0 := rec1(~i - 2);< 1181#rec1ENTRY ~i := #in~i; 1179#L12 assume !(~i <= 0); 1161#L14 call #t~ret0 := rec1(~i - 2);< 1178#rec1ENTRY ~i := #in~i; 1180#L12 assume ~i <= 0;#res := 0; 1222#rec1FINAL assume true; 1166#rec1EXIT >#27#return; 1133#L14-1 [2019-12-07 14:11:56,719 INFO L796 eck$LassoCheckResult]: Loop: 1133#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1132#rec1ENTRY ~i := #in~i; 1135#L12 assume ~i <= 0;#res := 0; 1140#rec1FINAL assume true; 1141#rec1EXIT >#29#return; 1154#L14-2 call #t~ret2 := rec1(#t~ret1);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume !(~i <= 0); 1157#L14 call #t~ret0 := rec1(~i - 2);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume ~i <= 0;#res := 0; 1205#rec1FINAL assume true; 1213#rec1EXIT >#27#return; 1133#L14-1 [2019-12-07 14:11:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2019-12-07 14:11:56,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92095642] [2019-12-07 14:11:56,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,731 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2019-12-07 14:11:56,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023232627] [2019-12-07 14:11:56,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-12-07 14:11:56,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023232627] [2019-12-07 14:11:56,759 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002069944] [2019-12-07 14:11:56,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:11:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,776 INFO L264 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-12-07 14:11:56,776 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:11:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:11:56,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-12-07 14:11:56,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2019-12-07 14:11:56,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622662633] [2019-12-07 14:11:56,780 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-12-07 14:11:56,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:11:56,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-12-07 14:11:56,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-12-07 14:11:56,781 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand 6 states. [2019-12-07 14:11:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:11:56,808 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2019-12-07 14:11:56,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-12-07 14:11:56,809 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2019-12-07 14:11:56,810 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-12-07 14:11:56,812 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2019-12-07 14:11:56,812 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2019-12-07 14:11:56,812 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2019-12-07 14:11:56,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2019-12-07 14:11:56,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:11:56,813 INFO L688 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2019-12-07 14:11:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2019-12-07 14:11:56,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2019-12-07 14:11:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-12-07 14:11:56,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2019-12-07 14:11:56,818 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2019-12-07 14:11:56,818 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2019-12-07 14:11:56,818 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-12-07 14:11:56,819 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2019-12-07 14:11:56,819 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-12-07 14:11:56,819 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:11:56,819 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:11:56,820 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:11:56,820 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:11:56,821 INFO L794 eck$LassoCheckResult]: Stem: 1445#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1446#L25 call main_#t~ret6 := rec2(main_~x~0);< 1458#rec2ENTRY ~j := #in~j; 1471#L18 assume !(~j <= 0); 1422#L20 call #t~ret3 := rec1(~j - 1);< 1470#rec1ENTRY ~i := #in~i; 1469#L12 assume !(~i <= 0); 1418#L14 call #t~ret0 := rec1(~i - 2);< 1467#rec1ENTRY ~i := #in~i; 1440#L12 assume ~i <= 0;#res := 0; 1417#rec1FINAL assume true; 1419#rec1EXIT >#27#return; 1410#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1441#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1434#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1435#rec1FINAL assume true; 1464#rec1EXIT >#33#return; 1404#L20-1 [2019-12-07 14:11:56,821 INFO L796 eck$LassoCheckResult]: Loop: 1404#L20-1 call #t~ret4 := rec2(#t~ret3);< 1403#rec2ENTRY ~j := #in~j; 1405#L18 assume !(~j <= 0); 1452#L20 call #t~ret3 := rec1(~j - 1);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume !(~i <= 0); 1447#L14 call #t~ret0 := rec1(~i - 2);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume ~i <= 0;#res := 0; 1511#rec1FINAL assume true; 1507#rec1EXIT >#27#return; 1411#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1506#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1463#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1475#rec1FINAL assume true; 1461#rec1EXIT >#33#return; 1404#L20-1 [2019-12-07 14:11:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2019-12-07 14:11:56,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,821 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768407286] [2019-12-07 14:11:56,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,833 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,833 INFO L82 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2019-12-07 14:11:56,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308294840] [2019-12-07 14:11:56,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:11:56,844 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:11:56,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:11:56,844 INFO L82 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2019-12-07 14:11:56,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:11:56,845 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449782138] [2019-12-07 14:11:56,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:11:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-12-07 14:11:56,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449782138] [2019-12-07 14:11:56,947 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790096816] [2019-12-07 14:11:56,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:11:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:11:56,973 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 14:11:56,975 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:11:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-12-07 14:11:56,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:11:56,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-12-07 14:11:56,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910773696] [2019-12-07 14:11:57,147 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:11:57,147 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:11:57,147 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:11:57,148 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:11:57,148 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:11:57,148 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:11:57,148 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:11:57,148 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:11:57,148 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2019-12-07 14:11:57,148 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:11:57,148 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:11:57,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:57,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:57,158 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:11:57,183 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:11:57,183 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:57,187 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:11:57,188 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:11:57,196 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:11:57,196 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:12:00,242 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:12:00,245 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:12:00,245 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:12:00,245 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:12:00,245 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:12:00,245 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:12:00,245 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:00,245 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:12:00,245 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:12:00,246 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2019-12-07 14:12:00,246 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:12:00,246 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:12:00,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:00,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:00,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:00,284 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:12:00,284 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:00,287 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 [2019-12-07 14:12:00,288 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:12:00,288 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:12:00,288 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:12:00,288 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:12:00,288 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:12:00,289 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:12:00,289 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:12:00,290 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:12:00,294 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 [2019-12-07 14:12:00,295 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:12:00,295 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:12:00,295 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:12:00,295 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:12:00,295 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:12:00,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:12:00,295 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:12:00,297 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/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 [2019-12-07 14:12:00,300 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 [2019-12-07 14:12:00,301 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:12:00,302 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:12:00,302 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:12:00,302 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:12:00,302 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:12:00,303 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:12:00,303 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:12:00,305 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:12:00,308 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 14:12:00,308 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:00,311 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:12:00,311 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:12:00,312 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:12:00,312 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2019-12-07 14:12:00,313 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:12:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:00,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:00,337 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-12-07 14:12:00,339 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:00,353 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:00,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:00,361 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:00,383 INFO L264 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 14:12:00,385 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-07 14:12:00,463 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-12-07 14:12:00,464 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand 11 states. [2019-12-07 14:12:00,725 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand 11 states. Result 584 states and 903 transitions. Complement of second has 45 states. [2019-12-07 14:12:00,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2019-12-07 14:12:00,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 14:12:00,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2019-12-07 14:12:00,726 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2019-12-07 14:12:00,727 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:00,727 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2019-12-07 14:12:00,727 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:00,727 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2019-12-07 14:12:00,728 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:00,728 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2019-12-07 14:12:00,737 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-12-07 14:12:00,745 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2019-12-07 14:12:00,746 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2019-12-07 14:12:00,746 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2019-12-07 14:12:00,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2019-12-07 14:12:00,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:12:00,747 INFO L688 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2019-12-07 14:12:00,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2019-12-07 14:12:00,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2019-12-07 14:12:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2019-12-07 14:12:00,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2019-12-07 14:12:00,769 INFO L711 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2019-12-07 14:12:00,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:12:00,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-12-07 14:12:00,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-12-07 14:12:00,769 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand 12 states. [2019-12-07 14:12:00,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:12:00,894 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2019-12-07 14:12:00,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-12-07 14:12:00,894 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2019-12-07 14:12:00,900 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-12-07 14:12:00,904 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2019-12-07 14:12:00,904 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2019-12-07 14:12:00,905 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2019-12-07 14:12:00,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2019-12-07 14:12:00,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:12:00,907 INFO L688 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2019-12-07 14:12:00,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2019-12-07 14:12:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2019-12-07 14:12:00,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2019-12-07 14:12:00,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2019-12-07 14:12:00,918 INFO L711 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2019-12-07 14:12:00,918 INFO L591 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2019-12-07 14:12:00,918 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-12-07 14:12:00,919 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2019-12-07 14:12:00,921 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-12-07 14:12:00,921 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:12:00,921 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:12:00,922 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:12:00,922 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 14:12:00,922 INFO L794 eck$LassoCheckResult]: Stem: 3437#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3438#L25 call main_#t~ret6 := rec2(main_~x~0);< 3454#rec2ENTRY ~j := #in~j; 3476#L18 assume !(~j <= 0); 3456#L20 call #t~ret3 := rec1(~j - 1);< 3474#rec1ENTRY ~i := #in~i; 3490#L12 assume !(~i <= 0); 3483#L14 call #t~ret0 := rec1(~i - 2);< 3489#rec1ENTRY ~i := #in~i; 3494#L12 assume ~i <= 0;#res := 0; 3548#rec1FINAL assume true; 3545#rec1EXIT >#27#return; 3540#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3541#rec1ENTRY ~i := #in~i; 3544#L12 assume ~i <= 0;#res := 0; 3543#rec1FINAL assume true; 3539#rec1EXIT >#29#return; 3535#L14-2 call #t~ret2 := rec1(#t~ret1);< 3537#rec1ENTRY ~i := #in~i; 3542#L12 assume ~i <= 0;#res := 0; 3538#rec1FINAL assume true; 3536#rec1EXIT >#31#return; 3532#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 3568#rec1FINAL assume true; 3455#rec1EXIT >#33#return; 3386#L20-1 call #t~ret4 := rec2(#t~ret3);< 3385#rec2ENTRY ~j := #in~j; 3387#L18 assume !(~j <= 0); 3521#L20 call #t~ret3 := rec1(~j - 1);< 3461#rec1ENTRY ~i := #in~i; 3567#L12 assume !(~i <= 0); 3423#L14 call #t~ret0 := rec1(~i - 2);< 3440#rec1ENTRY [2019-12-07 14:12:00,922 INFO L796 eck$LassoCheckResult]: Loop: 3440#rec1ENTRY ~i := #in~i; 3553#L12 assume !(~i <= 0); 3420#L14 call #t~ret0 := rec1(~i - 2);< 3440#rec1ENTRY [2019-12-07 14:12:00,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:00,923 INFO L82 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2019-12-07 14:12:00,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:12:00,923 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29528571] [2019-12-07 14:12:00,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:12:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:00,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:00,981 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-12-07 14:12:00,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29528571] [2019-12-07 14:12:00,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530278420] [2019-12-07 14:12:00,981 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:12:01,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:12:01,001 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:12:01,001 INFO L264 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2019-12-07 14:12:01,003 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-12-07 14:12:01,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:12:01,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-12-07 14:12:01,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768202245] [2019-12-07 14:12:01,007 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-12-07 14:12:01,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:01,008 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2019-12-07 14:12:01,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:12:01,008 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067670838] [2019-12-07 14:12:01,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:12:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:01,010 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:12:01,026 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:12:01,026 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:12:01,026 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:12:01,026 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:12:01,026 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:12:01,026 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,026 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:12:01,026 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:12:01,026 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2019-12-07 14:12:01,026 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:12:01,026 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:12:01,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,028 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,033 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,051 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:12:01,051 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,055 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:12:01,055 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:12:01,057 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:12:01,058 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 42 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,063 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:12:01,063 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 43 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,071 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:12:01,071 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:12:01,113 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:12:01,115 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:12:01,115 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:12:01,115 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:12:01,115 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:12:01,115 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:12:01,115 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,115 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:12:01,115 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:12:01,115 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2019-12-07 14:12:01,115 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:12:01,116 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:12:01,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,124 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,138 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:12:01,138 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 44 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,141 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 [2019-12-07 14:12:01,142 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:12:01,142 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:12:01,142 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:12:01,142 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:12:01,142 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:12:01,143 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:12:01,143 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:12:01,144 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,148 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 [2019-12-07 14:12:01,149 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:12:01,149 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:12:01,149 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:12:01,149 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:12:01,149 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:12:01,149 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:12:01,150 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:12:01,151 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:12:01,152 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-12-07 14:12:01,153 INFO L444 ModelExtractionUtils]: 1 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_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,155 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:12:01,155 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:12:01,155 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:12:01,155 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-12-07 14:12:01,157 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:12:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:01,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:01,189 INFO L264 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 14:12:01,191 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:01,202 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:01,204 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:01,206 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:01,212 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 14:12:01,212 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:01,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:12:01,224 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 14:12:01,224 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-12-07 14:12:01,271 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2019-12-07 14:12:01,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 14:12:01,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 14:12:01,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-12-07 14:12:01,272 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2019-12-07 14:12:01,272 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:01,272 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 14:12:01,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:01,302 INFO L264 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 14:12:01,303 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:01,315 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:01,317 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:01,320 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:01,326 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 14:12:01,327 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:01,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:12:01,343 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 14:12:01,343 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-12-07 14:12:01,396 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2019-12-07 14:12:01,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 14:12:01,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 14:12:01,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-12-07 14:12:01,397 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2019-12-07 14:12:01,397 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:01,397 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 14:12:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:01,442 INFO L264 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-12-07 14:12:01,443 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:01,455 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:01,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:01,458 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:01,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:01,464 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 14:12:01,465 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:12:01,477 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-12-07 14:12:01,477 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-12-07 14:12:01,535 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 485 states and 616 transitions. Complement of second has 16 states. [2019-12-07 14:12:01,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-12-07 14:12:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-12-07 14:12:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2019-12-07 14:12:01,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2019-12-07 14:12:01,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:01,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2019-12-07 14:12:01,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:01,537 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2019-12-07 14:12:01,537 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:01,537 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2019-12-07 14:12:01,541 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2019-12-07 14:12:01,546 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2019-12-07 14:12:01,546 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2019-12-07 14:12:01,546 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2019-12-07 14:12:01,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2019-12-07 14:12:01,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:12:01,547 INFO L688 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2019-12-07 14:12:01,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2019-12-07 14:12:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2019-12-07 14:12:01,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-12-07 14:12:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2019-12-07 14:12:01,557 INFO L711 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2019-12-07 14:12:01,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:12:01,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-12-07 14:12:01,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-12-07 14:12:01,557 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand 10 states. [2019-12-07 14:12:01,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:12:01,620 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2019-12-07 14:12:01,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-12-07 14:12:01,620 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2019-12-07 14:12:01,624 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-12-07 14:12:01,625 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2019-12-07 14:12:01,625 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2019-12-07 14:12:01,625 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2019-12-07 14:12:01,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2019-12-07 14:12:01,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:12:01,625 INFO L688 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2019-12-07 14:12:01,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2019-12-07 14:12:01,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2019-12-07 14:12:01,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-12-07 14:12:01,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2019-12-07 14:12:01,628 INFO L711 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2019-12-07 14:12:01,628 INFO L591 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2019-12-07 14:12:01,628 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-12-07 14:12:01,628 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2019-12-07 14:12:01,629 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-12-07 14:12:01,629 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:12:01,629 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:12:01,629 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-12-07 14:12:01,629 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-12-07 14:12:01,629 INFO L794 eck$LassoCheckResult]: Stem: 6182#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6183#L25 call main_#t~ret6 := rec2(main_~x~0);< 6187#rec2ENTRY ~j := #in~j; 6213#L18 assume !(~j <= 0); 6210#L20 call #t~ret3 := rec1(~j - 1);< 6212#rec1ENTRY ~i := #in~i; 6211#L12 assume !(~i <= 0); 6172#L14 call #t~ret0 := rec1(~i - 2);< 6189#rec1ENTRY ~i := #in~i; 6177#L12 assume !(~i <= 0); 6170#L14 [2019-12-07 14:12:01,630 INFO L796 eck$LassoCheckResult]: Loop: 6170#L14 call #t~ret0 := rec1(~i - 2);< 6219#rec1ENTRY ~i := #in~i; 6177#L12 assume !(~i <= 0); 6170#L14 [2019-12-07 14:12:01,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:01,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2019-12-07 14:12:01,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:12:01,630 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937042591] [2019-12-07 14:12:01,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:12:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:01,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:01,634 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:12:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2019-12-07 14:12:01,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:12:01,635 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349479325] [2019-12-07 14:12:01,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:12:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:01,637 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:12:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:01,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2019-12-07 14:12:01,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:12:01,638 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73757455] [2019-12-07 14:12:01,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:12:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:01,642 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:12:01,664 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:12:01,664 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:12:01,665 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:12:01,665 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:12:01,665 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:12:01,665 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,665 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:12:01,665 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:12:01,665 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2019-12-07 14:12:01,665 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:12:01,665 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:12:01,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:01,692 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:12:01,692 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 47 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,695 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:12:01,695 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 48 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:01,710 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:12:01,710 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:12:07,044 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:12:07,046 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:12:07,046 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:12:07,046 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:12:07,046 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:12:07,046 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:12:07,046 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,046 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:12:07,046 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:12:07,046 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2019-12-07 14:12:07,046 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:12:07,046 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:12:07,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,052 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,054 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,072 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:12:07,072 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,075 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 [2019-12-07 14:12:07,076 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:12:07,076 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:12:07,076 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:12:07,076 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:12:07,076 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:12:07,077 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:12:07,077 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:12:07,079 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:12:07,080 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-12-07 14:12:07,080 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 50 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,083 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:12:07,083 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:12:07,083 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:12:07,083 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2019-12-07 14:12:07,084 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:12:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,101 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-12-07 14:12:07,101 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 14:12:07,107 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-12-07 14:12:07,118 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-12-07 14:12:07,118 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 Second operand 4 states. [2019-12-07 14:12:07,139 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 100 states and 124 transitions. Complement of second has 11 states. [2019-12-07 14:12:07,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-12-07 14:12:07,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-12-07 14:12:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2019-12-07 14:12:07,140 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2019-12-07 14:12:07,141 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:07,141 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2019-12-07 14:12:07,141 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:07,141 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2019-12-07 14:12:07,141 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:07,141 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2019-12-07 14:12:07,143 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-12-07 14:12:07,144 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2019-12-07 14:12:07,144 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2019-12-07 14:12:07,144 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2019-12-07 14:12:07,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2019-12-07 14:12:07,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:12:07,145 INFO L688 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2019-12-07 14:12:07,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2019-12-07 14:12:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-12-07 14:12:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-12-07 14:12:07,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2019-12-07 14:12:07,149 INFO L711 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2019-12-07 14:12:07,149 INFO L591 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2019-12-07 14:12:07,149 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-12-07 14:12:07,149 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2019-12-07 14:12:07,149 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-12-07 14:12:07,150 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-12-07 14:12:07,150 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-12-07 14:12:07,151 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-12-07 14:12:07,151 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-12-07 14:12:07,151 INFO L794 eck$LassoCheckResult]: Stem: 6436#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6405#L25 call main_#t~ret6 := rec2(main_~x~0);< 6404#rec2ENTRY ~j := #in~j; 6406#L18 assume !(~j <= 0); 6439#L20 call #t~ret3 := rec1(~j - 1);< 6440#rec1ENTRY ~i := #in~i; 6461#L12 assume !(~i <= 0); 6424#L14 call #t~ret0 := rec1(~i - 2);< 6458#rec1ENTRY ~i := #in~i; 6475#L12 assume !(~i <= 0); 6408#L14 call #t~ret0 := rec1(~i - 2);< 6407#rec1ENTRY ~i := #in~i; 6409#L12 assume ~i <= 0;#res := 0; 6495#rec1FINAL assume true; 6493#rec1EXIT >#27#return; 6417#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6423#rec1ENTRY ~i := #in~i; 6489#L12 assume ~i <= 0;#res := 0; 6488#rec1FINAL assume true; 6466#rec1EXIT >#29#return; 6467#L14-2 call #t~ret2 := rec1(#t~ret1);< 6479#rec1ENTRY ~i := #in~i; 6485#L12 assume ~i <= 0;#res := 0; 6484#rec1FINAL assume true; 6477#rec1EXIT >#31#return; 6476#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 6464#rec1FINAL assume true; 6465#rec1EXIT >#27#return; 6418#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6454#rec1ENTRY [2019-12-07 14:12:07,151 INFO L796 eck$LassoCheckResult]: Loop: 6454#rec1ENTRY ~i := #in~i; 6482#L12 assume !(~i <= 0); 6422#L14 call #t~ret0 := rec1(~i - 2);< 6437#rec1ENTRY ~i := #in~i; 6481#L12 assume !(~i <= 0); 6415#L14 call #t~ret0 := rec1(~i - 2);< 6438#rec1ENTRY ~i := #in~i; 6435#L12 assume ~i <= 0;#res := 0; 6414#rec1FINAL assume true; 6416#rec1EXIT >#27#return; 6417#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6423#rec1ENTRY ~i := #in~i; 6489#L12 assume ~i <= 0;#res := 0; 6488#rec1FINAL assume true; 6466#rec1EXIT >#29#return; 6467#L14-2 call #t~ret2 := rec1(#t~ret1);< 6479#rec1ENTRY ~i := #in~i; 6485#L12 assume ~i <= 0;#res := 0; 6484#rec1FINAL assume true; 6477#rec1EXIT >#31#return; 6476#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 6464#rec1FINAL assume true; 6465#rec1EXIT >#27#return; 6419#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6454#rec1ENTRY [2019-12-07 14:12:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2019-12-07 14:12:07,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:12:07,152 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663197778] [2019-12-07 14:12:07,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:12:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:07,163 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:12:07,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:07,164 INFO L82 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2019-12-07 14:12:07,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:12:07,164 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865202737] [2019-12-07 14:12:07,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:12:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-12-07 14:12:07,173 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-12-07 14:12:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:07,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2019-12-07 14:12:07,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-12-07 14:12:07,173 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229551486] [2019-12-07 14:12:07,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-12-07 14:12:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-12-07 14:12:07,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229551486] [2019-12-07 14:12:07,252 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136656029] [2019-12-07 14:12:07,252 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-12-07 14:12:07,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-12-07 14:12:07,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-12-07 14:12:07,276 INFO L264 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2019-12-07 14:12:07,277 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-12-07 14:12:07,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-12-07 14:12:07,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 11 [2019-12-07 14:12:07,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584029160] [2019-12-07 14:12:07,419 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:12:07,419 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:12:07,419 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:12:07,419 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:12:07,419 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-12-07 14:12:07,419 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,420 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:12:07,420 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:12:07,420 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2019-12-07 14:12:07,420 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:12:07,420 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:12:07,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,444 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:12:07,444 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 52 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,447 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:12:07,447 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:12:07,449 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:12:07,449 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 53 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:12:07,454 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:12:07,457 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:12:07,457 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 54 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,461 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:12:07,461 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:12:07,464 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-12-07 14:12:07,465 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,468 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-12-07 14:12:07,468 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 56 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,475 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-12-07 14:12:07,475 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-12-07 14:12:07,479 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-12-07 14:12:07,480 INFO L210 LassoAnalysis]: Preferences: [2019-12-07 14:12:07,480 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-12-07 14:12:07,480 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-12-07 14:12:07,480 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-12-07 14:12:07,481 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-12-07 14:12:07,481 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,481 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-12-07 14:12:07,481 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-12-07 14:12:07,481 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2019-12-07 14:12:07,481 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-12-07 14:12:07,481 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-12-07 14:12:07,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,483 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,487 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,488 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-12-07 14:12:07,505 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-12-07 14:12:07,505 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 57 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,507 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 [2019-12-07 14:12:07,508 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:12:07,508 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:12:07,509 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:12:07,509 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:12:07,509 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:12:07,509 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:12:07,509 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:12:07,510 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 58 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,513 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 [2019-12-07 14:12:07,514 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:12:07,514 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:12:07,515 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:12:07,515 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:12:07,515 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:12:07,515 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:12:07,515 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:12:07,516 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 59 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,520 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 [2019-12-07 14:12:07,521 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-12-07 14:12:07,521 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-12-07 14:12:07,521 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-12-07 14:12:07,521 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-12-07 14:12:07,521 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-12-07 14:12:07,522 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-12-07 14:12:07,522 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-12-07 14:12:07,524 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-12-07 14:12:07,525 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-12-07 14:12:07,526 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_78b88798-941e-4e02-8530-c4598dac3e84/bin/uautomizer/z3 Starting monitored process 60 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-12-07 14:12:07,535 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-12-07 14:12:07,535 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-12-07 14:12:07,535 INFO L510 LassoAnalysis]: Proved termination. [2019-12-07 14:12:07,535 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-12-07 14:12:07,536 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-12-07 14:12:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,564 INFO L264 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 14:12:07,565 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:07,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:07,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:07,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 14:12:07,597 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-07 14:12:07,665 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-12-07 14:12:07,665 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-12-07 14:12:07,704 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2019-12-07 14:12:07,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:12:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 14:12:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-12-07 14:12:07,705 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2019-12-07 14:12:07,705 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:07,705 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 14:12:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,731 INFO L264 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 14:12:07,732 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:07,742 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:07,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:07,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 14:12:07,761 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-07 14:12:07,838 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2019-12-07 14:12:07,838 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-12-07 14:12:07,880 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2019-12-07 14:12:07,880 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-12-07 14:12:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 14:12:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-12-07 14:12:07,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2019-12-07 14:12:07,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:07,881 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 14:12:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 14:12:07,907 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:07,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:07,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:07,921 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:07,937 INFO L264 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 14:12:07,938 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-07 14:12:08,011 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-12-07 14:12:08,011 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-12-07 14:12:08,182 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 257 states and 303 transitions. Complement of second has 31 states. [2019-12-07 14:12:08,183 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2019-12-07 14:12:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 14:12:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2019-12-07 14:12:08,183 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2019-12-07 14:12:08,184 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:08,184 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-12-07 14:12:08,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-12-07 14:12:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:08,210 INFO L264 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-12-07 14:12:08,211 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:08,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:08,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:08,223 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-12-07 14:12:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-12-07 14:12:08,239 INFO L264 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-12-07 14:12:08,239 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-12-07 14:12:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-12-07 14:12:08,306 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2019-12-07 14:12:08,306 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-12-07 14:12:08,618 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 409 states and 515 transitions. Complement of second has 80 states. [2019-12-07 14:12:08,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2019-12-07 14:12:08,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-12-07 14:12:08,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2019-12-07 14:12:08,619 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2019-12-07 14:12:08,619 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:08,619 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2019-12-07 14:12:08,620 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:08,620 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2019-12-07 14:12:08,620 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-12-07 14:12:08,620 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2019-12-07 14:12:08,623 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2019-12-07 14:12:08,626 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2019-12-07 14:12:08,626 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2019-12-07 14:12:08,626 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2019-12-07 14:12:08,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2019-12-07 14:12:08,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-12-07 14:12:08,626 INFO L688 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2019-12-07 14:12:08,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2019-12-07 14:12:08,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2019-12-07 14:12:08,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-12-07 14:12:08,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2019-12-07 14:12:08,632 INFO L711 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2019-12-07 14:12:08,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-12-07 14:12:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-12-07 14:12:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-12-07 14:12:08,632 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand 11 states. [2019-12-07 14:12:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-12-07 14:12:08,713 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-12-07 14:12:08,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-12-07 14:12:08,713 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2019-12-07 14:12:08,714 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 14:12:08,714 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2019-12-07 14:12:08,714 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-12-07 14:12:08,714 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-12-07 14:12:08,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-12-07 14:12:08,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-12-07 14:12:08,714 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:12:08,714 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:12:08,714 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-12-07 14:12:08,714 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-12-07 14:12:08,714 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-12-07 14:12:08,714 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-12-07 14:12:08,714 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-12-07 14:12:08,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 07.12 02:12:08 BoogieIcfgContainer [2019-12-07 14:12:08,719 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-12-07 14:12:08,719 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-12-07 14:12:08,719 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-12-07 14:12:08,719 INFO L275 PluginConnector]: Witness Printer initialized [2019-12-07 14:12:08,720 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 02:11:55" (3/4) ... [2019-12-07 14:12:08,722 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-12-07 14:12:08,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-12-07 14:12:08,723 INFO L168 Benchmark]: Toolchain (without parser) took 14016.55 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 166.2 MB). Free memory was 939.3 MB in the beginning and 887.2 MB in the end (delta: 52.1 MB). Peak memory consumption was 218.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:12:08,724 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 959.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:12:08,724 INFO L168 Benchmark]: CACSL2BoogieTranslator took 169.06 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -156.2 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. [2019-12-07 14:12:08,725 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:12:08,725 INFO L168 Benchmark]: Boogie Preprocessor took 11.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-12-07 14:12:08,725 INFO L168 Benchmark]: RCFGBuilder took 140.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-12-07 14:12:08,726 INFO L168 Benchmark]: BuchiAutomizer took 13670.59 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 887.2 MB in the end (delta: 187.2 MB). Peak memory consumption was 258.0 MB. Max. memory is 11.5 GB. [2019-12-07 14:12:08,726 INFO L168 Benchmark]: Witness Printer took 2.80 ms. Allocated memory is still 1.2 GB. Free memory is still 887.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-12-07 14:12:08,728 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 959.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 169.06 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 95.4 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -156.2 MB). Peak memory consumption was 20.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 11.76 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 140.26 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 13670.59 ms. Allocated memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 887.2 MB in the end (delta: 187.2 MB). Peak memory consumption was 258.0 MB. Max. memory is 11.5 GB. * Witness Printer took 2.80 ms. Allocated memory is still 1.2 GB. Free memory is still 887.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5628590a and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 13.6s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 10.4s. Construction of modules took 0.6s. Büchi inclusion checks took 2.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 284 SDtfs, 352 SDslu, 489 SDs, 0 SdLazy, 977 SolverSat, 338 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf98 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq154 hnf92 smp100 dnf100 smp100 tf111 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 10ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...