./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:17:31,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:17:31,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:17:31,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:17:31,163 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:17:31,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:17:31,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:17:31,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:17:31,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:17:31,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:17:31,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:17:31,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:17:31,186 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:17:31,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:17:31,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:17:31,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:17:31,194 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:17:31,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:17:31,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:17:31,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:17:31,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:17:31,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:17:31,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:17:31,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:17:31,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:17:31,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:17:31,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:17:31,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:17:31,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:17:31,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:17:31,228 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:17:31,229 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:17:31,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:17:31,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:17:31,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:17:31,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:17:31,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:17:31,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:17:31,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:17:31,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:17:31,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:17:31,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-28 03:17:31,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:17:31,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:17:31,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:17:31,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:17:31,267 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:17:31,267 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:17:31,267 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:17:31,267 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:17:31,268 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:17:31,268 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:17:31,269 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:17:31,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:17:31,269 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:17:31,270 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:17:31,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:17:31,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:17:31,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:17:31,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:17:31,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:17:31,271 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:17:31,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:17:31,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:17:31,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:17:31,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:17:31,272 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:17:31,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:17:31,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:17:31,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:17:31,273 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:17:31,275 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:17:31,275 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 [2020-11-28 03:17:31,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:17:31,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:17:31,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:17:31,603 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:17:31,603 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:17:31,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2020-11-28 03:17:31,673 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/data/5e34659af/3528f45186694df2b97e811edecb2b91/FLAGf9be1ed90 [2020-11-28 03:17:32,119 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:17:32,120 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2020-11-28 03:17:32,126 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/data/5e34659af/3528f45186694df2b97e811edecb2b91/FLAGf9be1ed90 [2020-11-28 03:17:32,509 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/data/5e34659af/3528f45186694df2b97e811edecb2b91 [2020-11-28 03:17:32,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:17:32,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:17:32,518 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:32,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:17:32,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:17:32,522 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@160dbee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32, skipping insertion in model container [2020-11-28 03:17:32,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:17:32,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:17:32,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:32,770 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:17:32,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:17:32,807 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:17:32,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32 WrapperNode [2020-11-28 03:17:32,808 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:17:32,810 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:17:32,810 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:17:32,810 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:17:32,817 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:17:32,836 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:17:32,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:17:32,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:17:32,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,849 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... [2020-11-28 03:17:32,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:17:32,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:17:32,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:17:32,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:17:32,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-11-28 03:17:32,923 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-11-28 03:17:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-11-28 03:17:32,923 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-11-28 03:17:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:17:32,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:17:33,106 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:17:33,106 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-28 03:17:33,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:33 BoogieIcfgContainer [2020-11-28 03:17:33,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:17:33,108 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:17:33,109 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:17:33,117 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:17:33,117 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:17:33,117 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:17:32" (1/3) ... [2020-11-28 03:17:33,118 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6076a4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:17:33, skipping insertion in model container [2020-11-28 03:17:33,118 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:17:33,119 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:17:32" (2/3) ... [2020-11-28 03:17:33,119 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6076a4b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:17:33, skipping insertion in model container [2020-11-28 03:17:33,119 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:17:33,119 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:33" (3/3) ... [2020-11-28 03:17:33,120 INFO L373 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c.c [2020-11-28 03:17:33,174 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:17:33,174 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:17:33,174 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:17:33,174 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:17:33,175 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:17:33,175 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:17:33,175 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:17:33,175 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:17:33,188 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-28 03:17:33,209 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-28 03:17:33,209 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:17:33,209 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:17:33,216 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:17:33,216 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:17:33,216 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:17:33,217 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2020-11-28 03:17:33,219 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-28 03:17:33,220 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:17:33,220 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:17:33,220 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:17:33,220 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:17:33,227 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 [2020-11-28 03:17:33,227 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec2(~j - 1);< 3#rec2ENTRYtrue [2020-11-28 03:17:33,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:33,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2020-11-28 03:17:33,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:33,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636866766] [2020-11-28 03:17:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:33,318 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:33,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:33,322 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:33,338 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:17:33,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:33,340 INFO L82 PathProgramCache]: Analyzing trace with hash 39867, now seen corresponding path program 1 times [2020-11-28 03:17:33,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:33,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474037656] [2020-11-28 03:17:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:33,353 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:33,357 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:33,358 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:17:33,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash 48182123, now seen corresponding path program 1 times [2020-11-28 03:17:33,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:33,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114565682] [2020-11-28 03:17:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:33,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:33,367 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:33,371 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:33,373 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:17:33,599 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:17:33,600 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:17:33,600 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:17:33,600 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:17:33,601 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:17:33,601 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:33,601 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:17:33,601 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:17:33,602 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2020-11-28 03:17:33,602 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:17:33,602 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:17:33,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:33,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:33,636 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:33,644 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:33,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:33,718 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:17:33,719 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:33,733 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:33,734 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:17:33,739 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:17:33,739 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:33,766 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:33,766 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:17:33,776 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:17:33,776 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:33,797 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:33,797 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:17:33,804 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:17:33,804 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:33,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:33,830 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:33,867 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:17:33,868 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:17:33,917 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:17:33,919 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:17:33,919 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:17:33,919 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:17:33,919 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:17:33,920 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:17:33,920 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:33,920 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:17:33,920 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:17:33,920 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2020-11-28 03:17:33,920 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:17:33,920 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:17:33,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:33,935 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:33,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:33,950 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:33,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:34,187 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:17:34,191 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:34,195 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:17:34,198 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:17:34,198 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:17:34,198 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:17:34,199 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:17:34,199 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:17:34,200 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:17:34,201 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:17:34,203 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:34,225 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:17:34,227 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:17:34,227 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:17:34,227 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:17:34,227 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:17:34,227 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:17:34,230 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:17:34,230 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:17:34,233 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:17:34,237 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:17:34,237 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:34,241 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:17:34,241 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:17:34,241 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:17:34,242 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2020-11-28 03:17:34,264 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:17:34,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:34,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:17:34,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:17:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:34,403 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 [2020-11-28 03:17:34,404 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 4 states. [2020-11-28 03:17:34,565 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 4 states. Result 36 states and 44 transitions. Complement of second has 12 states. [2020-11-28 03:17:34,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-28 03:17:34,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-28 03:17:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2020-11-28 03:17:34,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2020-11-28 03:17:34,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:34,573 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2020-11-28 03:17:34,573 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:34,574 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2020-11-28 03:17:34,574 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:34,575 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 44 transitions. [2020-11-28 03:17:34,579 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:17:34,585 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 23 states and 30 transitions. [2020-11-28 03:17:34,586 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-11-28 03:17:34,586 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-11-28 03:17:34,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2020-11-28 03:17:34,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:17:34,589 INFO L691 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2020-11-28 03:17:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2020-11-28 03:17:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2020-11-28 03:17:34,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:17:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2020-11-28 03:17:34,613 INFO L714 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-11-28 03:17:34,613 INFO L594 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2020-11-28 03:17:34,614 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:17:34,614 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 24 transitions. [2020-11-28 03:17:34,615 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:17:34,615 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:17:34,615 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:17:34,616 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:34,616 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:17:34,616 INFO L794 eck$LassoCheckResult]: Stem: 125#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; 108#L25 call main_#t~ret6 := rec2(main_~x~0);< 107#rec2ENTRY ~j := #in~j; 109#L18 assume !(~j <= 0); 111#L20 call #t~ret3 := rec2(~j - 1);< 110#rec2ENTRY ~j := #in~j; 112#L18 assume ~j <= 0;#res := 0; 121#rec2FINAL assume true; 122#rec2EXIT >#33#return; 117#L20-1 call #t~ret4 := rec1(#t~ret3);< 113#rec1ENTRY [2020-11-28 03:17:34,616 INFO L796 eck$LassoCheckResult]: Loop: 113#rec1ENTRY ~i := #in~i; 118#L12 assume !(~i <= 0); 114#L14 call #t~ret0 := rec1(~i - 2);< 113#rec1ENTRY [2020-11-28 03:17:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1361947899, now seen corresponding path program 1 times [2020-11-28 03:17:34,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:34,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604696804] [2020-11-28 03:17:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:34,624 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:34,630 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:34,632 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:17:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:34,633 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2020-11-28 03:17:34,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:34,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399990108] [2020-11-28 03:17:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:34,639 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:34,642 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:34,643 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:17:34,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:34,644 INFO L82 PathProgramCache]: Analyzing trace with hash 766186353, now seen corresponding path program 1 times [2020-11-28 03:17:34,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:34,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923657428] [2020-11-28 03:17:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:34,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:17:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 03:17:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923657428] [2020-11-28 03:17:34,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:34,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:17:34,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816882592] [2020-11-28 03:17:34,829 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:17:34,829 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:17:34,829 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:17:34,829 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:17:34,829 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:17:34,829 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:34,829 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:17:34,830 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:17:34,830 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2020-11-28 03:17:34,830 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:17:34,830 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:17:34,831 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:34,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:34,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:34,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:34,859 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:34,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:34,925 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:17:34,925 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:17:34,934 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:34,934 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:17:34,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:17:34,984 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:35,062 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:17:35,063 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:17:35,064 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:17:35,064 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:17:35,064 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:17:35,064 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:17:35,064 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:35,064 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:17:35,064 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:17:35,064 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2020-11-28 03:17:35,065 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:17:35,065 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:17:35,066 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:35,091 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:35,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:35,100 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:35,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:35,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:35,177 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:17:35,177 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:35,183 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:17:35,185 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:17:35,185 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:17:35,185 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:17:35,185 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:17:35,185 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:17:35,187 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:17:35,187 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:17:35,192 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:17:35,201 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:17:35,201 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:17:35,207 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:17:35,207 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:17:35,207 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:17:35,208 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:35,241 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:17:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:17:35,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:17:35,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:35,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:35,446 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 [2020-11-28 03:17:35,446 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7 Second operand 5 states. [2020-11-28 03:17:35,612 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7. Second operand 5 states. Result 43 states and 58 transitions. Complement of second has 14 states. [2020-11-28 03:17:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-28 03:17:35,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-28 03:17:35,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2020-11-28 03:17:35,617 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 3 letters. [2020-11-28 03:17:35,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:35,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 13 letters. Loop has 3 letters. [2020-11-28 03:17:35,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:35,619 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 6 letters. [2020-11-28 03:17:35,619 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:35,619 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 58 transitions. [2020-11-28 03:17:35,624 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:17:35,628 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 37 states and 50 transitions. [2020-11-28 03:17:35,630 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-11-28 03:17:35,631 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2020-11-28 03:17:35,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 50 transitions. [2020-11-28 03:17:35,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:17:35,631 INFO L691 BuchiCegarLoop]: Abstraction has 37 states and 50 transitions. [2020-11-28 03:17:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 50 transitions. [2020-11-28 03:17:35,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-11-28 03:17:35,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 03:17:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2020-11-28 03:17:35,647 INFO L714 BuchiCegarLoop]: Abstraction has 35 states and 46 transitions. [2020-11-28 03:17:35,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:35,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:17:35,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:17:35,651 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2020-11-28 03:17:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:35,717 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2020-11-28 03:17:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:17:35,719 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 43 transitions. [2020-11-28 03:17:35,721 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:17:35,722 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 31 states and 40 transitions. [2020-11-28 03:17:35,723 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-11-28 03:17:35,723 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2020-11-28 03:17:35,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 40 transitions. [2020-11-28 03:17:35,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:17:35,723 INFO L691 BuchiCegarLoop]: Abstraction has 31 states and 40 transitions. [2020-11-28 03:17:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 40 transitions. [2020-11-28 03:17:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-11-28 03:17:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:17:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-28 03:17:35,736 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-28 03:17:35,736 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-28 03:17:35,736 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 03:17:35,736 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2020-11-28 03:17:35,741 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:17:35,741 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:17:35,741 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:17:35,742 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:17:35,745 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:17:35,745 INFO L794 eck$LassoCheckResult]: Stem: 347#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; 324#L25 call main_#t~ret6 := rec2(main_~x~0);< 323#rec2ENTRY ~j := #in~j; 325#L18 assume !(~j <= 0); 327#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 330#L18 assume !(~j <= 0); 328#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 329#L18 assume ~j <= 0;#res := 0; 340#rec2FINAL assume true; 341#rec2EXIT >#33#return; 332#L20-1 call #t~ret4 := rec1(#t~ret3);< 331#rec1ENTRY ~i := #in~i; 333#L12 assume ~i <= 0;#res := 0; 344#rec1FINAL assume true; 345#rec1EXIT >#35#return; 346#L20-2 #res := #t~ret4 - 1;havoc #t~ret3;havoc #t~ret4; 348#rec2FINAL assume true; 350#rec2EXIT >#33#return; 337#L20-1 call #t~ret4 := rec1(#t~ret3);< 342#rec1ENTRY [2020-11-28 03:17:35,745 INFO L796 eck$LassoCheckResult]: Loop: 342#rec1ENTRY ~i := #in~i; 349#L12 assume !(~i <= 0); 335#L14 call #t~ret0 := rec1(~i - 2);< 342#rec1ENTRY [2020-11-28 03:17:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:35,746 INFO L82 PathProgramCache]: Analyzing trace with hash -196165858, now seen corresponding path program 1 times [2020-11-28 03:17:35,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:35,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445757114] [2020-11-28 03:17:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:35,760 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:35,786 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:35,789 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:17:35,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:35,798 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2020-11-28 03:17:35,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:35,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688303938] [2020-11-28 03:17:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:35,802 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:35,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:17:35,807 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:17:35,809 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:17:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1473414328, now seen corresponding path program 1 times [2020-11-28 03:17:35,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:17:35,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149898970] [2020-11-28 03:17:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:17:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:17:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-28 03:17:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-28 03:17:35,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:17:35,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149898970] [2020-11-28 03:17:35,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:17:35,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-28 03:17:35,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610469510] [2020-11-28 03:17:35,996 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:17:35,996 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:17:35,996 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:17:35,996 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:17:35,997 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:17:35,997 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:35,997 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:17:35,997 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:17:35,997 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2020-11-28 03:17:35,997 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:17:35,997 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:17:35,998 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,008 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,010 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,013 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,020 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,076 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:17:36,076 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:17:36,086 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:36,086 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,090 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:17:36,090 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,120 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:36,121 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:17:36,123 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:17:36,123 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,148 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:36,149 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:17:36,151 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:17:36,151 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,172 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:36,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:17:36,175 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:17:36,175 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,196 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:36,196 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:17:36,198 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:17:36,198 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:36,226 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:17:36,226 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:36,264 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:17:36,264 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:17:36,326 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:17:36,327 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:17:36,327 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:17:36,327 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:17:36,327 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:17:36,327 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:17:36,327 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,328 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:17:36,328 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:17:36,328 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2020-11-28 03:17:36,328 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:17:36,328 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:17:36,329 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,346 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:17:36,427 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:17:36,427 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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) [2020-11-28 03:17:36,442 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:17:36,443 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:17:36,443 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:17:36,444 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:17:36,444 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:17:36,444 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:17:36,445 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:17:36,445 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,451 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:17:36,497 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:17:36,498 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:17:36,498 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:17:36,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:17:36,499 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:17:36,499 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:17:36,500 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:17:36,500 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,503 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:17:36,541 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:17:36,543 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:17:36,543 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:17:36,544 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:17:36,544 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:17:36,544 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:17:36,545 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:17:36,545 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,546 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,568 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:17:36,569 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:17:36,569 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:17:36,569 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:17:36,569 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:17:36,570 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:17:36,570 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:17:36,570 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:17:36,595 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:17:36,621 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:17:36,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:17:36,624 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:17:36,624 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:17:36,625 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:17:36,625 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:17:36,626 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:17:36,626 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:17:36,631 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:17:36,634 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:17:36,634 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_6af0a370-ef26-4ae7-9ca1-ae2704feb2d3/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 [2020-11-28 03:17:36,644 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:17:36,644 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:17:36,644 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:17:36,644 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2020-11-28 03:17:36,671 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:17:36,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:36,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:17:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:36,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:36,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:36,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:36,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:17:36,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:36,890 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 [2020-11-28 03:17:36,891 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2020-11-28 03:17:36,970 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2020-11-28 03:17:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 03:17:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-28 03:17:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-28 03:17:36,973 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2020-11-28 03:17:36,973 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:36,973 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:17:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:37,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:37,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:17:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:37,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:37,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:37,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:17:37,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:37,158 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 [2020-11-28 03:17:37,159 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2020-11-28 03:17:37,227 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2020-11-28 03:17:37,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 03:17:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-28 03:17:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2020-11-28 03:17:37,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2020-11-28 03:17:37,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:37,228 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:17:37,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:17:37,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:17:37,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:37,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:37,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:17:37,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:17:37,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:17:37,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:17:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:17:37,387 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 [2020-11-28 03:17:37,387 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2020-11-28 03:17:37,500 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 53 states and 65 transitions. Complement of second has 13 states. [2020-11-28 03:17:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-28 03:17:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-28 03:17:37,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 28 transitions. [2020-11-28 03:17:37,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 3 letters. [2020-11-28 03:17:37,501 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:37,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 24 letters. Loop has 3 letters. [2020-11-28 03:17:37,501 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:37,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 6 letters. [2020-11-28 03:17:37,502 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:17:37,502 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 65 transitions. [2020-11-28 03:17:37,504 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-28 03:17:37,506 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 41 states and 52 transitions. [2020-11-28 03:17:37,506 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2020-11-28 03:17:37,506 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2020-11-28 03:17:37,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 52 transitions. [2020-11-28 03:17:37,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:17:37,507 INFO L691 BuchiCegarLoop]: Abstraction has 41 states and 52 transitions. [2020-11-28 03:17:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 52 transitions. [2020-11-28 03:17:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-28 03:17:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 03:17:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-11-28 03:17:37,511 INFO L714 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-11-28 03:17:37,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:17:37,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:17:37,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:17:37,512 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2020-11-28 03:17:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:17:37,580 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-11-28 03:17:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 03:17:37,581 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 29 transitions. [2020-11-28 03:17:37,582 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:17:37,582 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 0 states and 0 transitions. [2020-11-28 03:17:37,582 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 03:17:37,582 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 03:17:37,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 03:17:37,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:17:37,582 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:17:37,583 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:17:37,583 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:17:37,583 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 03:17:37,583 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:17:37,583 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:17:37,583 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-28 03:17:37,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:17:37 BoogieIcfgContainer [2020-11-28 03:17:37,587 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:17:37,587 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:17:37,588 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:17:37,588 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:17:37,588 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:17:33" (3/4) ... [2020-11-28 03:17:37,591 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 03:17:37,591 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:17:37,593 INFO L168 Benchmark]: Toolchain (without parser) took 5078.09 ms. Allocated memory was 83.9 MB in the beginning and 121.6 MB in the end (delta: 37.7 MB). Free memory was 46.8 MB in the beginning and 70.8 MB in the end (delta: -24.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:37,593 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory is still 63.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:17:37,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.32 ms. Allocated memory is still 83.9 MB. Free memory was 46.6 MB in the beginning and 62.8 MB in the end (delta: -16.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:37,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.68 ms. Allocated memory is still 83.9 MB. Free memory was 62.8 MB in the beginning and 61.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:17:37,595 INFO L168 Benchmark]: Boogie Preprocessor took 14.74 ms. Allocated memory is still 83.9 MB. Free memory was 61.6 MB in the beginning and 60.7 MB in the end (delta: 878.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:17:37,595 INFO L168 Benchmark]: RCFGBuilder took 256.25 ms. Allocated memory is still 83.9 MB. Free memory was 60.7 MB in the beginning and 51.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:37,596 INFO L168 Benchmark]: BuchiAutomizer took 4478.62 ms. Allocated memory was 83.9 MB in the beginning and 121.6 MB in the end (delta: 37.7 MB). Free memory was 51.5 MB in the beginning and 71.8 MB in the end (delta: -20.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:17:37,597 INFO L168 Benchmark]: Witness Printer took 3.57 ms. Allocated memory is still 121.6 MB. Free memory is still 70.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:17:37,600 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 83.9 MB. Free memory is still 63.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.32 ms. Allocated memory is still 83.9 MB. Free memory was 46.6 MB in the beginning and 62.8 MB in the end (delta: -16.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.68 ms. Allocated memory is still 83.9 MB. Free memory was 62.8 MB in the beginning and 61.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.74 ms. Allocated memory is still 83.9 MB. Free memory was 61.6 MB in the beginning and 60.7 MB in the end (delta: 878.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 256.25 ms. Allocated memory is still 83.9 MB. Free memory was 60.7 MB in the beginning and 51.5 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4478.62 ms. Allocated memory was 83.9 MB in the beginning and 121.6 MB in the end (delta: 37.7 MB). Free memory was 51.5 MB in the beginning and 71.8 MB in the end (delta: -20.3 MB). Peak memory consumption was 17.9 MB. Max. memory is 16.1 GB. * Witness Printer took 3.57 ms. Allocated memory is still 121.6 MB. Free memory is still 70.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 2 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.4s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 2.6s. Construction of modules took 0.2s. Büchi inclusion checks took 1.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 88 SDtfs, 94 SDslu, 174 SDs, 0 SdLazy, 126 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf92 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq150 hnf94 smp100 dnf100 smp100 tf111 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 11ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...